To see the other types of publications on this topic, follow the link: Feeding automation.
Dissertations / Theses on the topic 'Feeding automation'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 45 dissertations / theses for your research on the topic 'Feeding automation.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Krull, Christoph [Verfasser]. "Optimization and Automation of Artificial Tick Feeding / Christoph Krull." Berlin : Freie Universität Berlin, 2020. http://d-nb.info/1212031822/34.
Full text
2
Yutkowitz, Stephen J. "A practical, vision-guided part feeding algorithm for flexible manufacturing automation." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/17552.
Full text
3
Mattie-Suleiman, Eman A. "Instrumentation and control of an industrial sewing machine." Thesis, De Montfort University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391336.
Full text
4
Bisaglia, C. "AUTOMAZIONE DELLA PREPARAZIONE E DISTRIBUZIONE DI RAZIONI COMPLETAMENTE MISCELATE (TMR) O UNIFEED PER BOVINE DA LATTE: POSSIBILITA' TECNOLOGICHE E RICADUTE PRODUTTIVE, GESTIONALI ED ECONOMICHE." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/217573.
Full textAbstract:
Feeding Total Mixed Rations (TMR) has become a common practice for dairy cows as a result of the benefits for the animals and the labour savings for farmers. Characteristic for this feeding system are the man-operated mechanical mixers. Besides the advantages of the TMR technique, it has the same drawback as most traditional ad-libitum feeding systems that the discharge of feed is limited to once, maximum twice a day. During the last 5-8 years, technologies for automatically feeding cows with TMR have grown in popularity. Almost 20 manufacturers are working worldwide on different designs for automatic feeding systems (AFS) while an estimated 400-500 farms have adopted this technology, mostly located in Northern Europe, Canada and Japan. The different manufacturers offer a wide range of technical solutions. Some of the most important aspects that characterize these systems include the possibility of a high frequency to distribute the ration, to control the feeding times, to stimulate the cow activity and to manage the composition of the total daily ration with the objective to control the feed intake. The management possibilities and the quality of work seem to be strongly affected by the concepts of the technical solutions that are now available. The thesys discusses, in Chapter 1, the physiologic aspects affecting the possibility of mechanize the feeding operations of dairy cows. In Chapter 2 the different automatic feeding technolgies have been analyzed and classified for the first time. In Chapter 3 the results of a survey involving the Wageningen University and carried out in 22 Dutch farms that use automatic systems for milking and feeding cows have been described. In Chapter 4 an assessment of the main functional parameters of AFSs such as mixing uniformity, physical composition of the ration and cows behaviour has been reported. In Chapter 5 the thesis reports the economic analisys related to the introduction of AFS and the first problems encountered leading to propose further research actions.
5
Dunn, Zelda. "Improved feed utilisation in cage aquaculture by use of machine vision." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/2824.
Full textAbstract:
Thesis (MScEng (Process Engineering))--Stellenbosch University, 2008.With the harvesting of fish and other aquatic organisms from natural waters having reached its upper limit, aquaculture is vital in providing for the ever increasing demand for fishery products (Boyd, 1999). Not surprisingly, aquaculture has seen considerable growth over the last decade or more. With the rising importance of aquaculture, there is an increased emphasis on cost and reducing of waste for environmental reasons. Therefore, attempts to automate or increase efficiency of feeding are constantly being explored. On an aquaculture unit approximately 60% of all costs are for feed; therefore high quality feeding management is essential for all fish farmers. The rainbow trout farm at Jonkershoek Aquaculture Research farm near Stellenbosch currently have a feeding management system which makes use of traditional hand feeding. Handfeeding is not considered optimal, as the feed intake or pellet loss is not closely monitored resulting in higher operating costs. Automation of aquaculture systems will allow the industry to produce closer to markets, improve environmental control, reduce catastrophic losses, minimize environmental regulation by reducing effluents, reduce production costs and improve product quality. The history of automated control in aquaculture has been brief; most of the systems have been custom-designed, personal computer systems. A very popular approach for an automated feeding system is to monitor waste pellets beneath the feeding zone of the fish, with a feedback loop that can switch off the feeder if this waste exceeds a predetermined threshold. Other approaches use hydroacoustics to monitor waste pellets or demand feeders have also been implemented. These approaches however are not considered optimal as automatic feeders do not necessarily ensure optimal feed intake. Social dominance using demand feeders does not allow even feeding distribution among all sizes of fish. In this project it was investigated whether an automated feeding system can be developed based on fish feeding behaviour. After facing problems with poor visibility at the Jonkershoek Aquaculture farm near Stellenbosch, video data were acquired from the Two Oceans Aquarium in Cape Town. Since it was a feasibility study, the focus was rather to investigate whether a predictive model could be generated for fish feeding behaviour in a more ideal environment which can form a foundation for further research. The well-established multivariate methods of principal components
6
Melin, Martin. "Optimising cow traffic in automatic milking systems : with emphasis on feeding patterns, cow welfare and productivity /." Uppsala : Dept. of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200563.pdf.
Full text
7
Oostra, Huibert H. "Technical and management tools in dairy production : improvements in automatic milking systems and detection of cows with deviating behaviour /." Alnarp : Dept. of Agricultural Biosystems and Technology, Swedish Univ. of Agricultural Sciences, 2005. http://epsilon.slu.se/200511.pdf.
Full text
8
Loffreno, Michele. "Computer Vision and Machine Learning for a Spoon-feeding Robot : A prototype solution based on ABB YuMi and an Intel RealSense camera." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-182503.
Full textAbstract:
A lot of people worldwide are affected by limitations and disabilities that make it hard to do even essential actions and everyday tasks, such as eating. The impact of robotics on the lives of elder people or people having any kind of inability, which makes it hard everyday actions as to eat, was considered. The aim of this thesis is to study the implementation of a robotic system in order to achieve an automatic feeding process. Different kinds of robots and solutions were taken into account, for instance, the Obi and the prototype realized by the Washington University. The system considered uses an RGBD camera, an Intel RealSense D400 series camera, to detect pieces of cutlery and food on a table and a robotic arm, an ABB-YuMi, to pick up the identified objects. The spoon detection is based on the pre-trained convolutional neural network AlexNet provided by MATLAB. Two detectors were implemented. The first one can detect up to four different objects (spoon, plate, fork and knife), the second one can detect only spoon and plate. Different algorithms based on morphology were tested in order to compute the pose of the objects detected. RobotStudio was used to establish a connection between MATLAB and the robot. The goal was to make the whole process as automated as possible. The neural network trained on two objects reached 100% of accuracy during the training test. The detector based on it was tested on the real system. It was possible to detect the spoon and the plate and to draw a good centered boundary box. The accuracy reached can be considered satisfying since it has been possible to grasp a spoon using the YuMi based on a picture of the table. It was noticed that the lighting condition is the key factor to get a satisfying result or to miss the detection of the spoon. The best result was archived when the light is uniform and there are no reflections and shadows on the objects. The pictures which get a better result for the detection were taken in an apartment. Despite the limitations of the interface between MATLAB and the controller of the YuMi, a good level of automation was reached. The influence of lighting conditions in this setting was discussed and some practical suggestions and considerations were made.No
9
Oliveira, Luciano Caetano de [UNESP]. "Altas frequências de arraçoamento nas fases iniciais da criação de Tilápia em hapas." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/104868.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:33:31Z (GMT). No. of bitstreams: 0
Previous issue date: 2010-07-01Bitstream added on 2014-06-13T19:23:33Z : No. of bitstreams: 1
oliveira_lc_dr_botfmvz.pdf: 534359 bytes, checksum: 425a226d27182c56505937288cf1636e (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Universidade Estadual Paulista (UNESP)
O presente estudo tem como objetivos avaliar o efeito de elevadas frequências de alimentação nas fases iniciais de criação de tilápia (Oreochromis niloticus) da linhagem GIFT sobre o desempenho produtivo, reversão sexual. Foram utilizados 24 hapas com abertura de malhas de (1 mm e 7 mm) , distribuídos em um viveiro de 1000 m2, com profundidade média de 1,5 metros e renovação de água de 7 % do volume total. As pós-larvas de tilápias, com peso e comprimento médio 0,015 ± 0,002 g e 10 ± 4 mm respectivamente, foram alojadas na densidade de 2 larvas por litro totalizando 500 larvas por hapa. Um sistema automatizado de alimentação foi instalado individualmente nos hapas. As pós-larvas foram submetidas a quatro diferentes frequências alimentares durante o dia e a noite: T24 (24 vezes – hora em hora); T32 (32 vezes – 45 em 45minutos); T48 (48 vezes – 30 em 30 minutos) e T96 (96 vezes – 15 em 15minutos) com seis repetições por tratamento. O processo de reversão sexual foi de 14 dias de administração de hormônio incorporado a dieta, e consequentemente foram alimentados com outras dietas por um período de 70 dias. Semanalmente foram realizadas biometrias de 50 animas, de cada unidade experimental, para a correção da oferta de alimento. Todas as frequências utilizadas foram eficientes no processo de reversão sexual em 14 dias. A frequência de 48 vezes de alimentação apresentou os melhores resultados para ganho de peso, peso médio final, sobrevivência e reversão sexual. Na fase juvenil não houve diferença significativa entre as frequências alimentares
The present study has objectives to evaluate the effect high feeding frequency in the initial phases of tilapia (Oreochromis niloticus) of strain GIFT on the growth performance, sex reversal. Were used 24 hapas with opening of meshes of (1 mm and 7 mm), distributed in a pond of 1000 m2, with medium depth of 1,5 meters and renewal of water of 7% of the total volume. The fry with medium weight and length (0.015 ± 0.002 g and 10.4 mm) respectively, with in the density of 2 fry by liter. An automated feeding system was installed individually in the hapas. The fry were submitted to four different feeding frequencies during the day and the night: T24 (24 times - hour in hour); T32 (32 times - 45 in 45 minutes); T48 (48 times - 30 in 30 minutes) and T96 (96vezes - 15 in 15 minutes) with six repetitions for treatment. The sex reversal process was in 14 days of administration the hormone diet, and consequently they were fed with other diets by a period of 70 days. Weekly samplings of 50 fish were accomplished, of each experimental unit, for the correction of the food offer. The high feeding frequencies were effective in the sex reversal process in 14 days, The feeding frequency of 48 presented the best results for weight wining, final medium weight, survival and sex reversal.. In the juvenile there was not significant difference among feeding frequencies
10
Wredle, Ewa. "Automatic milking and grazing : factors and stimuli affecting cow motivation to visit the milking unit /." Uppsala : Dept. of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/2005116.pdf.
Full text
11
Oliveira, Luciano Caetano de 1978. "Altas frequências de arraçoamento nas fases iniciais da criação de Tilápia em hapas /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/104868.
Full textAbstract:
Orientador: Claudio Angelo AgostinhoBanca: Margarida Maria Barros
Banca: Luiz Edivaldo Pezzato
Banca: Maria Célia Portella
Banca: Robie Allan Bombardelli
Resumo: O presente estudo tem como objetivos avaliar o efeito de elevadas frequências de alimentação nas fases iniciais de criação de tilápia (Oreochromis niloticus) da linhagem GIFT sobre o desempenho produtivo, reversão sexual. Foram utilizados 24 hapas com abertura de malhas de (1 mm e 7 mm) , distribuídos em um viveiro de 1000 m2, com profundidade média de 1,5 metros e renovação de água de 7 % do volume total. As pós-larvas de tilápias, com peso e comprimento médio 0,015 ± 0,002 g e 10 ± 4 mm respectivamente, foram alojadas na densidade de 2 larvas por litro totalizando 500 larvas por hapa. Um sistema automatizado de alimentação foi instalado individualmente nos hapas. As pós-larvas foram submetidas a quatro diferentes frequências alimentares durante o dia e a noite: T24 (24 vezes - hora em hora); T32 (32 vezes - 45 em 45minutos); T48 (48 vezes - 30 em 30 minutos) e T96 (96 vezes - 15 em 15minutos) com seis repetições por tratamento. O processo de reversão sexual foi de 14 dias de administração de hormônio incorporado a dieta, e consequentemente foram alimentados com outras dietas por um período de 70 dias. Semanalmente foram realizadas biometrias de 50 animas, de cada unidade experimental, para a correção da oferta de alimento. Todas as frequências utilizadas foram eficientes no processo de reversão sexual em 14 dias. A frequência de 48 vezes de alimentação apresentou os melhores resultados para ganho de peso, peso médio final, sobrevivência e reversão sexual. Na fase juvenil não houve diferença significativa entre as frequências alimentares
Abstract: The present study has objectives to evaluate the effect high feeding frequency in the initial phases of tilapia (Oreochromis niloticus) of strain GIFT on the growth performance, sex reversal. Were used 24 hapas with opening of meshes of (1 mm and 7 mm), distributed in a pond of 1000 m2, with medium depth of 1,5 meters and renewal of water of 7% of the total volume. The fry with medium weight and length (0.015 ± 0.002 g and 10.4 mm) respectively, with in the density of 2 fry by liter. An automated feeding system was installed individually in the hapas. The fry were submitted to four different feeding frequencies during the day and the night: T24 (24 times - hour in hour); T32 (32 times - 45 in 45 minutes); T48 (48 times - 30 in 30 minutes) and T96 (96vezes - 15 in 15 minutes) with six repetitions for treatment. The sex reversal process was in 14 days of administration the hormone diet, and consequently they were fed with other diets by a period of 70 days. Weekly samplings of 50 fish were accomplished, of each experimental unit, for the correction of the food offer. The high feeding frequencies were effective in the sex reversal process in 14 days, The feeding frequency of 48 presented the best results for weight wining, final medium weight, survival and sex reversal.. In the juvenile there was not significant difference among feeding frequencies
Doutor
12
Furlong, Vitor Badiale. "Automation of a reactor for enzymatic hydrolysis of sugar cane bagasse : Computational intelligencebased adaptive control." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/7394.
Full textAbstract:
Submitted by Luciana Sebin (lusebin@ufscar.br) on 2016-09-21T13:52:44Z
No. of bitstreams: 1
DissVBF.pdf: 4418595 bytes, checksum: aaae3efb173c8760a1039251a31ea973 (MD5)Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-23T18:23:48Z (GMT) No. of bitstreams: 1 DissVBF.pdf: 4418595 bytes, checksum: aaae3efb173c8760a1039251a31ea973 (MD5)
Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-23T18:24:01Z (GMT) No. of bitstreams: 1 DissVBF.pdf: 4418595 bytes, checksum: aaae3efb173c8760a1039251a31ea973 (MD5)
Made available in DSpace on 2016-09-23T18:24:10Z (GMT). No. of bitstreams: 1 DissVBF.pdf: 4418595 bytes, checksum: aaae3efb173c8760a1039251a31ea973 (MD5) Previous issue date: 2015-03-20
Não recebi financiamento
The continuous demand growth for liquid fuels, alongside with the decrease of fossil oil reserves, unavoidable in the long term, induces investigations for new energy sources. A possible alternative is the use of bioethanol, produced by renewable resources such as sugarcane bagasse. Two thirds of the cultivated sugarcane biomass are sugarcane bagasse and leaves, not fermentable when the current, first-generation (1G) process is used. A great interest has been given to techniques capable of utilizing the carbohydrates from this material. Among them, production of second generation (2G) ethanol is a possible alternative. 2G ethanol requires two additional operations: a pretreatment and a hydrolysis stage. Regarding the hydrolysis, the dominant technical solution has been based on the use of enzymatic complexes to hydrolyze the lignocellulosic substrate. To ensure the feasibility of the process, a high final concentration of glucose after the enzymatic hydrolysis is desirable. To achieve this objective, a high solid consistency in the reactor is necessary. However, a high load of solids generates a series of operational difficulties within the reactor. This is a crucial bottleneck of the 2G process. A possible solution is using a fed-batch process, with feeding profiles of enzymes and substrate that enhance in the process yield and productivity. The main objective of this work was to implement and test a system to infer online concentrations of fermentable carbohydrates in the reactive system, and to optimize the feeding strategy of substrate and/or enzymatic complex, according to a model-based control strategy. Batch and fed-batch experiments were conducted in order to test the adherence of four simplified kinetic models. The model with best adherence to the experimental data (a modified Michaelis-Mentem model with inhibition by the product) was used to train an Artificial Neural Network (ANN) as a softsensor to predict glucose concentrations. Further, this ANN may be used in a closedloop control strategy. A feeding profile optimizer was implemented, based on the optimal control approach. The ANN was capable of inferring the product concentration from the available data with good adherence (Determination Coefficient of 0.972). The optimization algorithm generated profiles that increased a process performance index while maintaining operational levels within the reactor, reaching glucose concentrations close to those utilized in current first generation technology a (ranging between 156.0 g.L⁻¹ and 168.3 g.L⁻¹). However rough estimates for scaling up the reactor to industrial dimensions indicate that this conventional reactor design must be replaced by a two-stage reactor, to minimize the volume of liquid to be stirred.
A crescente demanda por combustíveis líquidos, bem como a diminuição das reservas de petróleo, inevitáveis a longo prazo, induzem pesquisas por novas fontes de energia. Uma possível solução é o uso do bioetanol, produzido de resíduos, como o bagaço de cana-deaçúcar. Dois terços da biomassa cultivada são bagaço e folhas. Estas frações não são fermentescíveis quando se usa a tecnologia de primeira geração atual (1G). Um grande interesse vem sendo prestado a técnicas capazes de utilizar os carboidratos deste material. Dentre elas, a produção de etanol de segunda geração (2G) é uma possível alternativa. Etanol 2G requer duas operações adicionais: etapas de pré-tratamento e hidrólise. Considerando a hidrólise, a técnica dominante tem sido a utilização de complexos enzimáticos para hidrolisar o substrato lignocelulósico. Para assegurar a viabilidade do processo, uma alta concentração final de glicose é necessária ao final do processo. Para atingir esse objetivo, uma alta concentração de sólidos no reator é necessária. No entanto, uma carga grande de sólidos gera uma série de dificuldades operacionais para o processo. Este é um gargalo crucial do processo 2G. Uma possível solução é utilizar um processo de batelada alimentada, com perfis de alimentação de enzima e substrato para aumentar produtividade e rendimento. O principal objetivo deste trabalho é implementar e testar um sistema para inferir concentração de carboidratos fermentescíveis automaticamente e otimizar a política de substrato e/ou enzima em tempo real, de acordo com uma estratégia de controle baseada em modelo cinético. Experimentos de batelada e batelada alimentada foram realizados a fim de testar a aderência de 4 modelos cinéticos simplificados. O modelo com melhor aderência aos dados experimentais (um modelo de Michaelis-Mentem modificado com inibição por produto) foi utilizado para gerar dados a fim de treinar uma rede neural artificial para predizer concentrações de glicose automaticamente. Em estudos futuros, esta rede pode ser utilizada para compor o fechamento da malha de controle. Um otimizador de perfil de alimentação foi implementado, este foi baseado em uma abordagem de controle ótimo. A rede neural foi capaz de predizer a concentração de produto com os dados disponíveis de maneira satisfatória (Coeficiente de Determinação de 0.972). O algoritmo de otimização gerou perfis que aumentaram a performance do processo enquanto manteve as condições da hidrólise dentro de níveis operacionais, e gerou concentrações de glicose próximas as obtidas pelo caldo de cana-de-açúcar da primeira geração (valores entre 156.0 g.L ¹ e 168.3 g.L ¹). No entanto, estimativas iniciais de ⁻ ⁻ aumento de escala do processo demonstraram que para atingir dimensões industriais o projeto do reator utilizado deve ser analisado, substituindo o mesmo por um processo em dois estágios para diminuir o volume do reator e energia para agitação.
13
Homdim, Tchuenteu Joel Landry. "Analysis and dynamic modeling of intermediate distributors for balancing of production lines." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18626/.
Full textAbstract:
The work carried out at the company Pulsar Engineering s.r.l, and discussed in this thesis, focuses on the construction of a model for the dynamic simulation of the operations of a machine that allows feeding and sorting/merging in the tissue sector called REDS INTERMEDIATE.
The goal is to derive a powerful dynamic model that can simulate a large range of REDS intermediate that could work in different existing operating modes (DIVERTER, COMBINER and By-pass modes) and containing all existing operating strategies (REVOLVER and TETRIS strategies). This was possible with the aid of a powerful simulation tool called PLS DYNAMIC/ TISSUEPLS DYNAMIC.
It is important to emphasize that we will deal with a simplified production line since we are interested in just getting the REDS INTERMEDIATE model.
This model can be used to:
- Obtain a real estimate of the parameters necessary for the design of a production line.
- See the behaviour of the PULSAR line in a 2D and 3D interface proposed by the software.
The following discussion reports the study in question presenting some result, starting from a general description of the production lines, and a static analysis of the REDS INTERMEDIATE.
14
Prescott, Neville. "Dairy cow behaviour and automatic milking." Thesis, University of Bristol, 1995. http://hdl.handle.net/1983/5cd2feb0-5362-4a12-b545-9861f4b7aaf9.
Full textAbstract:
Voluntary automatic milking is a system whereby dairy cows can be milked as the cow desires without routine human intervention. Motivation to be milked was studied in a Y -maze and an automatic milking system (AMS). In both motivation to be milked was variable. In the Y -maze some early lactation cows chose to be milked every 31/ 2 hours five times per day, but there was much individual variation. Late lactation cows did not choose to be milked less often than the early lactation cows. When given the choice to be milked or fed concentrate in the Y -maze, early lactation cows always chose to eat. In the AMS mean attendance increased from 1.1 visits/ cow / day when they were not fed concentrate to 2.8 visits/cow/day when they were fed concentrate. The effects of feeding in the AMS on attendance were studied. Feeding concentrate in the parlour had no effect on attendance or the number of milkings. The AMS exit area feed type (where the cows had to visit the AMS to reach the food; either forage or concentrate) however, had a significant effect on attendance (forage: 6.0 visits/cow/day, concentrate: 4.1 visits/cow/day, s.e.d=0.25) but only a small effect on the frequency of milkings (forage: 2.6 milkings/cow/day, concentrate: 2.4 milkings/cow/day, s.e.d=0.06). Feeding forage in the exit area, as opposed to freely available in the bedded area, significantly reduced the total forage feeding time (209 vs 289 minutes/cow/day, s.e.d=33.6), and the number of bouts (4.9 vs 7.9 bouts/cow/day). Feeding cows in the parlour increased the level of shuffling during the automatic teat cup attachment process (6.7 vs. 3.4 shuffles/cow/milking, s.e.d 2.07). There were no other behavioural effects or any effects on their milking characterisitcs. Future automatic milking systems could feed concentrate in the exit area as the lure to attract cows into the system. There is no requirement to feed cows while they are being milked.
15
Anschau, Sandra Paula. "Protótipo de alimentador automático para a larvicultura da tilápia (Oreochromis niloticus)." Universidade Estadual do Oeste do Parana, 2016. http://tede.unioeste.br:8080/tede/handle/tede/1952.
Full textAbstract:
Made available in DSpace on 2017-07-10T18:13:22Z (GMT). No. of bitstreams: 1
Sandra P Anschau.pdf: 1880583 bytes, checksum: ddb07c1ecd08368a07c24f3fdf129c2a (MD5)
Previous issue date: 2016-05-05Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The food automation provides increased productivity, feed efficiency, uniformity of lots, uniformity in the sexual inverse and the best performance. This study aimed to develop a low cost automatic feeder, by a microcontrolled platform called ARDUINO UNO®, which was able to provide installments feed previously programmed. To the prototype development in question was used basically: flotation and support structure, feed tank and screw conveyor, motor and electronic systems. The support system was deployment with the use of plastic flooring (HDPE-high density polyethylene). The sides of the plastic floor with the aid of clamps were attached PVC tubes with the float feature. The fiberglass feed tank was developed with useful capacity to store five kilograms nine hundred and twenty grams of powder feed with output to screw conveyor, the screw conveyor was machined in nylon material, and is in turn surrounded by a PVC tuber. To drive the screw conveyor it was connected to an electric motor with 12-volt operating voltage rating accopled to a gear unit based on mechanical system called gear motor. It is worth noting that the electronic power system uses a 12-volt rechargeable battery of supplying capacity of 7 Ah, high to necessary to the operation of 14 days. The programming language used was the C language, by Arduino 1.0.3 software. The equipment in question showed satisfactory results in terms of its functionality. The feed frequency became precise in the category of time and quantity since this is an automated system and not depending on a person to handle the fish feeding, since the human being in turn is often inaccurate. Another important point to establish is that the equipment allows changing in the programmatically feed frequency. The developed automatic feeder emphasizes the importance of investing in aquaculture technologies to optimize the cost and improving the feed system in the hatchery.
A automatização alimentar propicia o aumento da produtividade e eficiência alimentar, a uniformidade dos lotes, a homogeneidade na inversão sexual e o melhor desempenho produtivo. Esse trabalho teve por objetivo desenvolver um alimentador automático de baixo custo, por meio de uma plataforma microcontrolada denominada ARDUINO UNO® auxiliada pelo módulo rele, que teve a capacidade de fornecer o alimento parcelado previamente programado. Para o desenvolvimento do protótipo em questão utilizou-se: estrutura para flutuação e sustentação, reservatório de ração e rosca transportadora, sistemas motor e eletrônico. O sistema de sustentação elaborado feito com a utilização de piso plástico (PEAD - polietileno de alta densidade). Nas laterais do piso plástico, por auxílio de abraçadeiras, foram acoplados tubulações de PVC com a funcionalidade de flutuação. O reservatório de ração foi desenvolvido em fibra de vidro com capacidade útil para armazenar cinco quilos, novecentos e vinte gramas de ração em pó e este possui uma saída de quarenta milímetros para a rosca transportadora, que por sua vez foi usinada em material nylon e envolvida por uma tubulação de PVC. Para a movimentação da rosca transportadora conectou-se um motor elétrico com a tensão nominal de operação de 12 volts acoplado a um redutor baseado em sistema mecânico denominado rosca sem fim. Vale salientar que o sistema de alimentação eletrônico utiliza uma bateria recarregável de 12 volts com capacidade de fornecimento de 7 amper hora, superior ao necessário para o funcionamento durante 14 dias. A linguagem de programação utilizada foi a linguagem C, por meio do software Arduino 1.0.3. O equipamento em questão apresentou resultados satisfatórios quanto a sua funcionalidade. A frequência alimentar tornou-se precisa no quesito de tempo e quantidade pois trata-se de um sistema automatizado e não mais dependendo de um indivíduo para alimentar os peixes, pois o ser humano por sua vez é, muitas vezes impreciso. Outro ponto importante a se fixar é que o equipamento permite alteração da frequência alimentar de forma programada. O alimentador automático desenvolvido ressalta a importância de se investir em tecnologias na aquicultura para a otimização do custo e aperfeiçoamento do sistema alimentar na larvicultura.
16
Martineli, Gabriel Moreno [UNESP]. "Automação do fornecimento de ração e fracionamento da ração diária para tilápias criadas em ambiente controlado com dieta balanceada." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/148685.
Full textAbstract:
Submitted by GABRIEL MORENO MARTINELI null (gabrielmartineli_613@hotmail.com) on 2017-01-30T18:06:25Z
No. of bitstreams: 1
Dissertação Gabriel Moreno Martineli.pdf: 625535 bytes, checksum: c498ba925bc09d910344d1f899e4e448 (MD5)Approved for entry into archive by LUIZA DE MENEZES ROMANETTO (luizamenezes@reitoria.unesp.br) on 2017-02-03T16:24:19Z (GMT) No. of bitstreams: 1 martinelli_gm_me_bot.pdf: 625535 bytes, checksum: c498ba925bc09d910344d1f899e4e448 (MD5)
Made available in DSpace on 2017-02-03T16:24:19Z (GMT). No. of bitstreams: 1 martinelli_gm_me_bot.pdf: 625535 bytes, checksum: c498ba925bc09d910344d1f899e4e448 (MD5) Previous issue date: 2017-01-16
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo desde estudo foi avaliar o efeito da frequência alimentar sobre o desempenho produtivo, morfologia intestinal e digestibilidade da proteína de tilápias (Oreochromis niloticus) criadas em ambiente controlado. Para realização do experimento foram utilizadas 180 tilápias da linhagem Supreme com peso médio de 114 ± 1,8g, distribuídas em 18 aquários de 300 litros, com temperatura controlada a 28 ± 0,9 ºC. Todas as tilápias foram microchipadas e cada uma representou uma repetição dentro de cada tratamento experimental. Três frequências alimentares (2, 4 e 24 refeições/dia) ao dia foram testadas, em delineamento inteiramente casualizado com 60 repetições por tratamento. Uma dieta balanceada foi fornecida por alimentadores automáticos, com taxa de alimentação inicial de 4% de peso vivo e a quantidade fornecida ajustada diariamente por Controlador Lógico Programável (CLP). O experimento teve duração de 56 dias. Ao final do período experimental foram avaliados o desempenho produtivo (ganho médio de peso, peso médio final, sobrevivência e conversão alimentar); índices hepatossomático, lipossomático e repleção gástrica, concentração de glicose sanguínea; morfologia intestinal (vilo, profundidade de cripta e relação vilo:cripta) e bromatólogia da carcaça. Os animais alimentados com 24 refeições/dia apresentaram peso médio final e maior ganho médio de peso, menores índices de repleção gástrica, menores níveis de glicose sanguínea e maior relação vilo:cripta. O ensaio de digestibilidade foi realizado após o período de 56 dias e teve duração de sete dias. Para determinação do coeficiente da digestibilidade aparente da proteína os peixes fora alimentados com a mesma dieta balanceada, marcadas com 0,1% de óxido crômio III, e coleta de fezes por decantação. Não houve diferença entre três frequências alimentares avaliadas para os coeficientes da digestibilidade aparente da proteína. Com base nos resultados conclui-se que o fracionamento da porção diária em 24 refeições/dia diminui a sobrecarga gástrica e influenciou no maior ganho médio de peso das tilápias.
The objective of this study was to evaluate the effect of dietary frequency on the productive performance, intestinal morphology and digestibility of tilapia protein (Oreochromis niloticus) grown in a controlled environment. For the experiment, 180 tilapia of the Supreme lineage with an average weight of 114 ± 1.8g were used, distributed in 18 aquariums of 300 liters, with controlled temperature at 28 ± 0,9 ºC. All tilapia were microchipped and each represented one replicate within each experimental treatment. Three feeding frequencies (2, 4 and 24 meals / day) per day were tested in a completely randomized design with 60 replicates per treatment. A balanced diet was provided by automatic feeders, with initial feed rate of 4% live weight and the amount supplied adjusted daily by Programmable Logic Controller (CLP). The experiment lasted 56 days. At the end of the experimental period, the productive performance (mean weight gain, final mean weight, survival and feed conversion) were evaluated; Hepatosomatic, liposomal and gastric repletion indexes, blood glucose concentration; Intestinal morphology (villus, depth of crypt and relation villus: crypt) and carcass bromatology. Animals fed with 24 meals / day presented mean final weight and weight gain, lower rates of gastric repletion, lower blood glucose levels and higher villus: crypt ratio. The digestibility assay was performed after the 56 day period and lasted seven days. For determine the coefficient of apparent digestibility of the protein, the fish were fed the same balanced diet, labeled with 0.1% chromium oxide III, and fecal collection by decanting. There was no difference between three food frequencies evaluated for the coefficients of protein apparent digestibility. Based on the results, it was concluded that fractionation of the daily portion at 24 meals / day decreased gastric overload and influenced the higher average weight gain of tilapia.
17
Psotti, Andrea. "Design of a new Human Machine Interface for bar feeding automatic machines towards Industry 4.0 smart factories." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
Find full textAbstract:
Un caricatore di barre è una macchina automatica solitamente installata a valle di una macchina utensile, il suo compito è di fornire un flusso costante e continuo di materiale da lavorare al tornio. Questa macchina è di estrema importanza all'interno di una torneria meccanica in quanto è responsabile dell’autonomia del processo di lavorazione; per questa ragione le principali caratteristiche di un caricatore di barre sono: stabilità, errori e problemi devono presentarsi raramente, robustezza, la macchina infatti deve essere in grado di tollerare malfunzionamenti sia elettrici che meccanici, e, infine, un caricatore deve sempre essere correttamente interfacciato con la macchina utensile che rifornisce.
IEMCA è una società italiana che progetta e produce dal 1961 caricatori automatici di barre.
L’obiettivo finale è di formulare una proposta per una nuova interfaccia uomo-macchina da installare e vendere sulle nuove macchine prodotte da IEMCA, considerando i concetti dell’Industry 4.0.
Il processo di progettazione inizierà con un esame tecnico della piattaforma esistente, analizzandone il principio di funzionamento. Successivamente verrà svolta un’estensiva ricerca di mercato nei mercati italiano, tedesco e statunitense con il fine di comprendere i punti di forza e debolezza dell’attuale interfaccia, i punti di forza e debolezza di altre interfacce uomo-macchina per caricatori di barre presenti sul mercato e investigando possibili sviluppi futuri provenienti da richieste del mercato nell’industria delle macchine utensili e studiando struttura e caratteristiche dell’Industry 4.0.
Infine si creerà un prototipo di software per l’interfaccia uomo-macchina che ingloberà tutti gli aspetti e le funzionalità emerse dalla ricerca e dalle fasi del processo di progettazione. Se gli obiettivi saranno raggiunti la nuova soluzione HMI sarà installata e venduta su tutte le nuove macchine prodotte da IEMCA, quindi su tutti i caricatori di barre, venduti in tutto il globo.
18
Martineli, Gabriel Moreno. "Automação do fornecimento de ração e fracionamento da ração diária para tilápias criadas em ambiente controlado com dieta balanceada." Botucatu, 2017. http://hdl.handle.net/11449/148685.
Full textAbstract:
Orientador: Claudio Angelo AgostinhoResumo: O objetivo desde estudo foi avaliar o efeito da frequência alimentar sobre o desempenho produtivo, morfologia intestinal e digestibilidade da proteína de tilápias (Oreochromis niloticus) criadas em ambiente controlado. Para realização do experimento foram utilizadas 180 tilápias da linhagem Supreme com peso médio de 114 ± 1,8g, distribuídas em 18 aquários de 300 litros, com temperatura controlada a 28 ± 0,9 ºC. Todas as tilápias foram microchipadas e cada uma representou uma repetição dentro de cada tratamento experimental. Três frequências alimentares (2, 4 e 24 refeições/dia) ao dia foram testadas, em delineamento inteiramente casualizado com 60 repetições por tratamento. Uma dieta balanceada foi fornecida por alimentadores automáticos, com taxa de alimentação inicial de 4% de peso vivo e a quantidade fornecida ajustada diariamente por Controlador Lógico Programável (CLP). O experimento teve duração de 56 dias. Ao final do período experimental foram avaliados o desempenho produtivo (ganho médio de peso, peso médio final, sobrevivência e conversão alimentar); índices hepatossomático, lipossomático e repleção gástrica, concentração de glicose sanguínea; morfologia intestinal (vilo, profundidade de cripta e relação vilo:cripta) e bromatólogia da carcaça. Os animais alimentados com 24 refeições/dia apresentaram peso médio final e maior ganho médio de peso, menores índices de repleção gástrica, menores níveis de glicose sanguínea e maior relação vilo:cripta. O ensaio de digestib... (Resumo completo, clicar acesso eletrônico abaixo)
Mestre
19
Taroni, Elisa. "Razionalizzazione del sistema di material handling per l'alimentazione delle linee di montaggio. Il caso IEMCA - Bucci Automations S.p.A." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Find full textAbstract:
Il presente elaborato è volto alla razionalizzazione del sistema di material handling per l’alimentazione delle linee di montaggio della IEMCA, una divisione della società Bucci Automations S.p.A., la quale opera nel settore dell’automazione industriale. Le fluttuazioni della domanda di mercato sono tali da rendere difficile la gestione della logistica interna e l’organizzazione degli spazi dello stabilimento, per questa ragione si è reso necessario lo sviluppo di un progetto volto alla riduzione delle inefficienze presenti nel processo di line feeding.
La criticità principale riscontrata risiede nel pessimo sfruttamento della capacità di carico dei veicoli, il quale si ripercuote sulle prestazioni del sistema di material handling, aumentando i costi ad esso connessi. Per migliorare le performance è stata proposta la creazione di una baia di consolidamento delle unità di carico, la quale consente di massimizzare la saturazione dei veicoli e di cambiare la logica di alimentazione delle linee. La soluzione introdotta ha permesso un notevole miglioramento dello sfruttamento della capacità di carico dei carrelli elevatori, il quale si ripercuoterà su tutti gli altri indicatori. Nel complesso, infatti, si è registrato un risparmio percentuale del 50% del tempo e delle distanze percorse dai veicoli ogni giorno, oltre che un saving economico di 68.000 euro nell’arco dei 7 mesi simulati.
Infine, per migliorare la flessibilità e l’elasticità del sistema di material handling, il presente elaborato propone la costruzione di un indicatore in grado di quantificare le ore di movimentazione necessarie per la produzione di ciascuna tipologia di caricatore, al fine di dimensionare le risorse in funzione del mix produttivo. Ciò ha permesso di stimare il numero di operatori necessari per le attività di material handling, in accordo con gli obiettivi di produzione previsti per il prossimo anno.
20
Forsberg, Anne-Mari. "Factors affecting cow behaviour in a barn equipped with an automatic milking system /." Uppsala : Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/11200991.pdf.
Full text
21
Sousa, Rodrigo Morgado Ramalho de 1982. "Frequência alimentar para Tilápia do Nilo (Oreochromis niloticus) nas fases de reversão e pós-reversão sexual /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/104981.
Full textAbstract:
Orientador: Claudio Angelo AgostinhoBanca: Luiz Edivaldo Pezzato
Banca: Margarida Maria de Barros
Banca: Ricardo Pereira Ribeiro
Banca: Maria Célia Portella
Resumo: Este trabalho objetivou avaliar o efeito da baixa e da alta frequência de alimentação no desempenho produtivo de peixes alimentados com ração contendo ou não hormônio masculinizante no primeiro mês de vida. Foram alojadas 2,5 larvas L-1 em 24 hapas com 200 litros cada. O delineamento experimental foi inteiramente casualizado em arranjo fatorial 2X2 com seis repetições. Foram testadas duas frequências de alimentação (6 e 24 vezes) e ração com e sem hormônio. Houve interação entre frequência alimentar e o tipo de ração para as variáveis de peso final e taxa de reversão. As tilápias alimentadas com ração contendo hormônio e sem hormônio submetidas à frequência de 24 vezes ao dia apresentaram peso final de 0,82 e 0,65 g, respectivamente. Para os valores de conversão alimentar aparente houve diferença em função da frequência de alimentação, onde a frequência de 24 vezes apresentou melhor resultado. A taxa de sobrevivência não diferiu entre os tratamentos. Conclui-se que a maior frequência de alimentação aumenta a disponibilidade da ração durante o dia, reduz a competição pelo alimento, aumenta a uniformidade do lote e proporciona melhor desempenho das tilápias, possibilitando aumento da produtividade de 2,5 a 3,2 vezes
Abstract: The appropriate feeding is a basic premise for the sustainable development of fish farming. The use of 17-α-methyltestosterone increases tilapia performance, but it has been questioned and criticized. This study aimed to analyze the low and high feed frequency effect in fish performance with male hormone or hormone-free diet in the first month of life. Five thousand larvae were placed in 24 hapas with 200 liters each. (2.5 larvae L-1) The experiment was completely randomized 2X2 factorial design with six replicates. Two feeding frequencies (six and 24 times a day) and two diets with and without hormone were tested. There was interaction between feeding frequency and diets for final weight and sex reverse rate. Tilapias fed with hormone and hormone-free diet 24 times a day showed a final weight of 0.82 and 0.65g, respectively. There was significant effect of feeding frequency on apparent feed conversion and the best result was found for the frequency of 24 times a day. The survival rate was not different among treatments. It was concluded that the increase of feeding frequency increases the diet disponible during the day, reduces the food competition, diminishes pollution by excess of diet in the water, increases the lot homogeny and results in better tilapia performance, increasing the productivity 2.5 to 3.2 times more
Doutor
22
Boudella, Mohamed El Amine. "Etude d’un système hybride de kitting semi-automatisé dans le secteur automobile : conception du système et modèle d’optimisation pour l’affectation des pièces aux pickers." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC057.
Full textAbstract:
Cette thèse, réalisée en collaboration avec le Groupe Renault dans le cadre d’un projet d’automatisation du kitting, s’intéresse à l’optimisation du processus de kitting en termes de maximisation du temps de cycle. Pour cela, nous étudions différentes configurations de système de kitting hybride avec robots(s) et opérateur(s) travaillant en série et séparés par un stock de découplage. Le(s) robot(s) commence(nt) la préparation des kits de pièces puis le(s) opérateur(s) se trouvant dans la partie manuelle du kitting récupère(nt) cette préparation et la complète(nt) avec les pièces affectées à cette zone.Notre objectif est de développer un outil d’aide à la décision permettant d’évaluer la performance d’un kitting hybride et de simuler son fonctionnement dans une configuration donnée (layout, politique de picking, etc.) avant son déploiement physique.Tout d’abord, à travers une modélisation des opérationsélémentaires de kitting effectuées par des robots et des opérateurs (prise et dépose, déplacement, etc.), nous proposons un modèle de temps de cycle permettant d’évaluer la performance du système hybride en termes de temps de cycle. Ensuite, nous développons un modèle d’affectation de pièces (PLMNE) permettant de les répartir entre kitting robotisé et manuel. L’objectif est de minimiser les temps de cycle et d’équilibrer la charge de travail entre les deux modes de kitting. Le modèle est appliqué à deux études de cas pratiques issues d’une usine Renault. Les résultats permettent d’identifier les paramètres qui impactent le plus les temps de cycle et le choix d’affectation des pièces entre kitting automatisé et manuel. Enfin, nous développons un modèle de simulation afin de calculer la taille optimale du stock de découplage entre kitting automatisé et manuel dans le but de maximiser la cadence du système hybride de kittingIn this thesis, conducted with Renault in the context of a kitting automation project, we are interested in the optimisation of kitting processes in terms of cycle time maximisation. To do so, we study different configurations of hybrid robot-operator kitting systems where robots (two types of robots considered) and operators are connected in series by an intermediate buffer (to decouple their activities). The robotic kitting area starts the preparation of kits then the operators in the manual kitting area retrieve the preparation of robots and complete with the remaining parts.Our objective is to develop a decision-making tool that assesses the hybrid system performance in a given configuration (layout, picking policy, etc.).First, through a modelling of elementary kitting operations performed by robots and operators (pick and place, travel, etc.), we develop a cycle time model to assess the performance of hybrid kitting systems. Then, we develop an assignment model that assigns parts (formulated as a mixed integer linear programming (MILP) problem) either to robotic or manual kitting areas with the objective of minimising cycle times and balancing workload between them. The model is applied to two case studies pertaining to a Renault plant. This analysis identifies the parameters that influence cycle times and the choice between robotic and manual kitting. Finally, we develop a simulation model to find the optimal buffer size between robotic and manual kitting so that throughput is maximised
23
Sousa, Rodrigo Morgado Ramalho de [UNESP]. "Frequência alimentar para Tilápia do Nilo (Oreochromis niloticus) nas fases de reversão e pós-reversão sexual." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/104981.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:33:33Z (GMT). No. of bitstreams: 0
Previous issue date: 2010-05-07Bitstream added on 2014-06-13T20:25:08Z : No. of bitstreams: 1
sousa_rmr_dr_botfmvz.pdf: 346604 bytes, checksum: 77799b9166260e8f4ac81391e3f26fdf (MD5)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Universidade Estadual Paulista (UNESP)
Este trabalho objetivou avaliar o efeito da baixa e da alta frequência de alimentação no desempenho produtivo de peixes alimentados com ração contendo ou não hormônio masculinizante no primeiro mês de vida. Foram alojadas 2,5 larvas L-1 em 24 hapas com 200 litros cada. O delineamento experimental foi inteiramente casualizado em arranjo fatorial 2X2 com seis repetições. Foram testadas duas frequências de alimentação (6 e 24 vezes) e ração com e sem hormônio. Houve interação entre frequência alimentar e o tipo de ração para as variáveis de peso final e taxa de reversão. As tilápias alimentadas com ração contendo hormônio e sem hormônio submetidas à frequência de 24 vezes ao dia apresentaram peso final de 0,82 e 0,65 g, respectivamente. Para os valores de conversão alimentar aparente houve diferença em função da frequência de alimentação, onde a frequência de 24 vezes apresentou melhor resultado. A taxa de sobrevivência não diferiu entre os tratamentos. Conclui-se que a maior frequência de alimentação aumenta a disponibilidade da ração durante o dia, reduz a competição pelo alimento, aumenta a uniformidade do lote e proporciona melhor desempenho das tilápias, possibilitando aumento da produtividade de 2,5 a 3,2 vezes
The appropriate feeding is a basic premise for the sustainable development of fish farming. The use of 17-α-methyltestosterone increases tilapia performance, but it has been questioned and criticized. This study aimed to analyze the low and high feed frequency effect in fish performance with male hormone or hormone-free diet in the first month of life. Five thousand larvae were placed in 24 hapas with 200 liters each. (2.5 larvae L-1) The experiment was completely randomized 2X2 factorial design with six replicates. Two feeding frequencies (six and 24 times a day) and two diets with and without hormone were tested. There was interaction between feeding frequency and diets for final weight and sex reverse rate. Tilapias fed with hormone and hormone-free diet 24 times a day showed a final weight of 0.82 and 0.65g, respectively. There was significant effect of feeding frequency on apparent feed conversion and the best result was found for the frequency of 24 times a day. The survival rate was not different among treatments. It was concluded that the increase of feeding frequency increases the diet disponible during the day, reduces the food competition, diminishes pollution by excess of diet in the water, increases the lot homogeny and results in better tilapia performance, increasing the productivity 2.5 to 3.2 times more
24
Ribeiro, Raphaela Rezende [UNESP]. "Automação do fornecimento de ração para organismos aquáticos." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/132960.
Full textAbstract:
Submitted by RAPHAELA REZENDE RIBEIRO null (rezende.ribeiro@hotmail.com) on 2016-01-26T18:53:58Z
No. of bitstreams: 1
Raphaela Rezende Ribeiro.pdf: 601777 bytes, checksum: d58277eb36cd019d14bd9e0213e88c98 (MD5)Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-01-28T13:18:57Z (GMT) No. of bitstreams: 1 ribeiro_rr_dr_bot.pdf: 601777 bytes, checksum: d58277eb36cd019d14bd9e0213e88c98 (MD5)
Made available in DSpace on 2016-01-28T13:18:57Z (GMT). No. of bitstreams: 1 ribeiro_rr_dr_bot.pdf: 601777 bytes, checksum: d58277eb36cd019d14bd9e0213e88c98 (MD5) Previous issue date: 2016-01-06
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
The success of frog culture depends on the quality of tadpoles, resulting in large and healthy juveniles for rearing. The tadpoles production is the bottleneck of frog culture and its deficit results in a lack of production stability. One of the limiting factors in the frog breeding is the need to provide powder food in the water, as it has low stability and little time fluctuation, reducing its availability and quality due to the sinking and leaching. One way to improve the availability of powder food is increase feeding frequency. This study was to evaluate the effect of feeding frequency and time on performance of bullfrog tadpoles (Lithobates catesbeianus). The experiment was conducted in a factorial completely randomized design, 3x2, with three feeding frequency (12, 24 and 48 times / day) in two periods of supply, day and night, with 5 repetitions each. 30,000 tadpoles were distributed in 30 cages of 0.294 m³ in a pound. The powdered food containing 32% CP was provided through pre-programmed automatic feeders. There was interaction between the treatments; the tadpoles fed 48 meals a day at night gained more weight (4,35g) compared to other treatments. The production of tadpoles in cages with high frequency power and at night proved to be the best treatment at this stage of creation of the bullfrog . This management used decreased the time of metamorphosis of these animals.
Cap. 2: Este trabalho consistiu em avaliar o efeito da frequência e horário de alimentação sobre o desempenho de girinos de rã-touro (Lithobates catesbeianus). O experimento teve duração de 75 dias. Foi realizado em delineamento inteiramente casualizado em modelo fatorial 3x2, com 3 frequências alimentares (12, 24 e 48 refeições/dia) em dois períodos de fornecimento de ração, diurno e noturno, com 5 repetições cada. Foram utilizados 30.000 girinos com peso inicial de 0,10 ± 0,06 g, distribuídos em 30 hapas de 0,294 m³ em viveiro escavado. A ração em pó contendo 32% PB foi fornecida por meio de alimentadores automáticos pré-programados. Houve interação entre os tratamentos testados, os girinos que receberam 48 refeições diárias no período noturno ganharam mais peso (4,35g) em relação aos outros tratamentos. A produção de girinos em hapas com alta frequência de alimentação e no período noturno demonstrou ser o melhor tratamento nesta fase de criação da rã-touro. Este manejo utilizado diminuiu o tempo de metamorfose desses animais. Cap. 3: A automatização da alimentação é uma ferramenta importante para melhorar o manejo alimentar dos peixes, influenciando no consumo de ração, na conversão alimentar e no custo de produção, diminuindo o desperdício, a poluição e a competição por alimento. Este experimento foi realizado em delineamento inteiramente casualizado em modelo fatorial 3x2, utilizando três temperaturas da água de cultivo (22, 25 e 28ºC) e duas frequências de alimentação (alta, 24 refeições ou baixa, 4 refeições) com taxa de alimentação de 4% do peso vivo, com três repetições por tratamento. O experimento teve duração de 63 dias. Em cada aquário experimental, com volume de 300 litros foram alojados 29 alevinos de tilápia da linhagem GIFT revertidos com peso médio de 9,0 ± 1,6g. Os peixes foram alimentados com ração extrusada contendo 36% de PB. Os melhores resultados de peso total final foram encontrados nos tratamentos de 4 refeições/dia nas temperaturas de 25 e 28°C (1826,6 e 1913,4g, respectivamente) e no de 24 refeições/dia com 25°C (1839,8g). A menor frequência de alimentação é melhor quando maior a temperatura da água, pois o maior fracionamento do alimento pode causar brigas e disputas que podem aumentar significativamente a mortalidade. Na temperatura de 25°C, tanto o uso de alta frequência quanto o de baixa frequência de alimentação demonstraram-se eficientes no desempenho produtivo de tilápias GIFT, assim como a menor frequência de alimentação na temperatura de 28°C.
25
Lindén, Annica, and Anna Ågren. "Load flow control and optimization of Banverket’s 132 kV 16 2/3 Hz high voltage grid." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4583.
Full textAbstract:
The purpose of this thesis was to investigate the possibility of power flow control, on a section of a railway grid fed by rotary converters, using an extra feeding line. Two possible solutions for the power flow control were examined. The first using a series reactance in connection to each converter station and the second by changing the tap changer level of the transformer between the converter station and the feeding line.
In the two models a distance, comparable to the distance between Boden and Häggvik, in Stockholm, was used. The simulations were performed using the software SIMPOW.
The results from the performed simulations show that series reactances, under the stated conditions, can essentially improve the power flow. To implement this air coils with inductances in the approximate size of 10 to 45 mH could be used. Further, the tap changer levels of the transformer may be used, for individual converter stations, as a way to control the reactive power flow.
26
Aquino, Marcos Silva de. "Desenvolvimento de uma desfribadeira para obten??o da fibra da folha do abacaxi." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15664.
Full textAbstract:
Made available in DSpace on 2014-12-17T14:58:12Z (GMT). No. of bitstreams: 1
MarcosSA.pdf: 1402858 bytes, checksum: aafed934486c8c9ba68e0133cc239956 (MD5)
Previous issue date: 2006-05-19Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
In 1998 the first decorticator was developed in the Textile Engineering Laboratory and patented for the purpose of extracting fibres from pineapple leaves, with the financial help from CNPq and BNB. The objective of the present work was to develop an automatic decorticator different from the first one with a semiautomatic system of decortication with automatic feeding of the leaves and collection of the extracted fibres. The system is started through a command system that passes information to two engines, one for starting the beater cylinder and the other for the feeding of the leaves as well as the extraction of the decorticated fibres automatically. This in turn introduces the leaves between a knife and a beater cylinder with twenty blades (the previous one had only 8 blades). These blades are supported by equidistant flanges with a central transmission axis that would help in increasing the number of beatings of the leaves. In the present system the operator has to place the leaves on the rotating endless feeding belt and collect the extracted leaves that are being carried out through another endless belt. The pulp resulted form the extraction is collected in a tray through a collector. The feeding of the leaves as well as the extraction of the fibres is controlled automatically by varying the velocity of the cylinders. The semi-automatic decorticator basically composed of a chassis made out of iron bars (profile L) with 200cm length, 91 cm of height 68 cm of width. The decorticator weighs around 300Kg. It was observed that the increase in the number of blades from 8 to twenty in the beater cylinder reduced the turbulence inside the decorticator, which helped to improve the removal of the fibres without any problems as well as the quality of the fibres. From the studies carried out, from each leaf 2,8 to 4,5% of fibres can be extracted. This gives around 4 to 5 tons of fibres per hectare, which is more than that of cotton production per hectare. This quantity with no doubt could generate jobs to the people not only on the production of the fibres but also on their application in different areas
No ano de 1998 foi patenteada uma desfibradeira que foi desenvolvida no laborat?rio de Engenharia T?xtil da UFRN, com objetivo de desfibrar a folha do abacaxi, com apoio do CNPq e BNB. O presente trabalho objetiva desenvolver uma desfibradeira automatizada com a mesma finalidade e se buscou a fabrica??o de uma nova desfibradeira com sistema semi-autom?tico. A desfibradeira ? acionada atrav?s de um quadro de comando, que passa informa??es para dois motores, um para acionamento do cilindro batedor e outro para os movimentos de alimenta??o das folhas e sa?da das fibras. A desfibradeira ? composta de um sistema de alimenta??o autom?tico, atrav?s de uma esteira sem fim, que desloca as folhas at? os cilindros alimentadores, que introduz as mesmas, entre uma espera (faca) e um batedor rotativo de vinte palhetas (desfibradeira anterior s? tinha 8 palhetas). Estas palhetas s?o apoiadas em tr?s flanges eq?idistantes com um eixo central de transmiss?o possibilitando um maior numero de batidas na folha. Portanto o operador tem a fun??o de colocar as folhas na esteira de alimenta??o e retirar as fibras que foram desfibradas, que est?o na esteira de sa?da. A qualidade das fibras extra?das pode ser melhorada atrav?s do controle da velocidade de entrada das folhas bem como a velocidade de cilindro batedor. Al?m disso, h? sistema de remo??o de polpa numa bandeja separadamente. A desfibradeira foi confeccionada com um chassi em cantoneiras (perfis L ) tendo com dimens?es b?sicas de comprimento de 200 cm, a altura de 91 cm e a largura de 68 cm. O peso total da desfibradeira ? de 250 kg. A caracter?stica mais importante da m?quina ? um maior numero de batida e uma menor turbul?ncia de ar dentro da m?quina. Isso facilitou a melhoria da qualidade das fibras. Os estudos mostram que de cada folha pode ser extra?do cerca de 2,8 a 4,5 % de fibras Assim sendo pode ser retirada cerca de 4 a 5 toneladas de fibras por hectare. Esta quantidade ? bem maior do que a produ??o de algod?o por hectare. Quando as fibras sendo empregadas no mercado podem gerar postos de trabalho e renda para popula??o do campo bem como das suas aplica??es
27
Krauß, Michael. "The Influence of Management Strategies on the Water Productivity in Dairy Farming and Broiler Production." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18560.
Full textAbstract:
Die Wasserproduktivität in der Tierhaltung ist von vielen Faktoren abhängig. Die Futterproduktion hat den größten Anteil am Wasserbedarf von tierischen Produkten. Weitere Einflussfaktoren sind die Leistung, die Reproduktion und der Gesundheitsstatus der Tiere, das Management und die Haltungsbedingungen. In dieser Arbeit sollte untersucht werden, wie sich diese Faktoren auf die Wasserproduktivität von Milch und Geflügelfleisch in Nord-Ost-Deutschland auswirken. Zehn unterschiedliche Futtermittel wurden hinsichtlich ihres Wasserbedarfes untersucht. Aus diesen Futtermitteln wurden die Rationen für die Tiere erstellt. Die Milchleistung der Kühe wurde zwischen 4.000 und 12.000 kg Milch pro Kuh und Jahr in 2.000 kg Schritten variiert. Für jedes Leistungsniveau wurden zwölf verschiedene Fütterungsstrategien untersucht, welche auf der Erhöhung einzelner Bestandteile der Ration basieren. Der Wasserbedarf von Leitungswasser im Stall wurde mit 38 Wasserzählern ermittelt. Für die Wasserproduktivität des Geflügelfleisches wurden vier verschieden intensive Mastverfahren untersucht.
Die Wasserproduktivität steigt mit steigender Milchleistung der Kühe. Das Maximum wird bei 10.000 kg Milch pro Kuh und Jahr und Rationen mit einem hohem Gras- bzw. Maissilageanteil erreicht.
Die Kühe, die im automatischen Melksystem gemolken wurden, nahmen mehr Tränkwasser zu sich, als die Kühe im Fischgrätenmelkstand. Dies ist durch die höhere Milchleistung bedingt. Im automatischen Melksystem wurden im Mittel 28,6 Liter Reinigungswasser pro Kuh und Tag benötigt. Für die Reinigung des Fischgrätenmelkstandes wurden 33,8 Liter pro Kuh und Tag genutzt.
Die untersuchten Broilermastverfahren zeigten keine Unterschiede hinsichtlich der Wasserproduktivität. Die intensivere Aufzucht und bessere Futterverwertung wurde durch eine niedrigere Wasserproduktivität des Futters kompensiert.
Der Anteil des technischen Wassers macht in der Milchkuh- und Broilerhaltung nur einen kleinen Teil am Gesamtwasserbedarf aus.Livestock production is the main user of water resources in agricultural production. Water is used in animal production for producing feed, watering the animals, and cleaning and disinfecting barns and equipment. The objective of this dissertation was to quantify the effects of management strategies, such as feeding, intensity of production and the replacement process on the water productivity of milk and poultry meat in Germany. Water productivity in milk and broiler production systems was calculated based on the methodology of Prochnow et al. (2012). Own measurements of the drinking and cleaning water demand in milk production were conducted in a dairy cow barn. The study was based on site conditions of North-East Germany with common variations in farm operations. The feed production is the main contributor to water input in dairy and poultry production. The water productivity of milk increased with an increasing milk yield. The most beneficial conditions related to water productivity in dairy farming were found to be with a milk yield of approximately 10,000 kg fat corrected milk and a grass silage and maize silage based feeding. The total technical water use in the barn makes only a minor contribution to water use. Former regression functions of the drinking water intake of the cows were reviewed and a new regression function based on the ambient temperature and the milk yield was developed. In broiler production the intensification of the fattening systems did not increase water productivity. An increase of water productivity in animal production can be achieved with various management strategies with their specific influence on the production process. The feed management should be a focus of the strategies.
28
Mangala, Ngongo Katembo. "Integration and control of feeding devices." Thesis, 2012. http://hdl.handle.net/10210/7648.
Full textAbstract:
M.Ing.Parts feeding devices or feeders are used in automated assembly systems to deliver correctly oriented parts to the assembly station workhead. These devices play an important operational role since feeding is one of the major operations involved in an automated assembly process. However they account for much of the cost of an automated assembly system because most of the engineering time spent to develop such a system is used to devise a means of feeding the components in the correct orientation for the assembly process. This thesis describes the implementation of an integrated and computer controlled feeding and transfer system. The system consists of a vibratory bowl feeder for selecting, orienting and feeding parts and a flat conveyor belt for transferring parts to a prescribed location. The work focusses mainly on the design and analysis of the bowl feeder, on the mechanical and information interfacing aspects of the integration problem and on the control of the system. Sensing and electronic control circuits were also built to complete the system. The system implemented is to be integrated at a later stage with an industrial robot for handling purposes. Therefore, some issues related to the handling of parts from the conveyor belt by the robot are also discussed. Experimental results show that the recommendable operating frequency for the vibratory feeder is close to the value predicted by theoretical analysis. Several concurrent activities with critical time constraints and different periods were involved in the system, making the control more difficult due to the limited control capabilities of Visual basic, an easy to learn programming language used to implement the control program and the relatively slow speed of the computer used Nevertheless, it was observed that for feed rates close to 3 parts/min, the program developed performs well regarding the random control of the flow rate of parts on the conveyor, parts position and speed profiles obtained compare satisfactorily with the corresponding theoretical profiles. Recommendations for the integration of the robot to the system are made.
29
Tsai, Teng-En, and 蔡登恩. "Development of an Automatic Spring Feeding System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/24502427960589022084.
Full textAbstract:
碩士國立屏東科技大學
機械工程系所
98
Design an automatic material supply system of spring insert into grease nipple in produce procedure is the main purpose of this study. This system included technologies of automatic supply of spring and cam-location of material supply. Developed a cam structure to complete precise reciprocating location action on material supply was the research focus. The research and develop of this high-precision, highly accurate and high speed automatic material supply system can replace the current operation mode of manual material supply and increase the produce efficiency of grease nipple. Hence, the consistent integrated operation by automatic connect systems can be reached. The testing result shows that the operation speed of this equipment can be control well under 0.75 sec/pcs (more than 80 pcs/min ). The succeed rate of insert was more than 99.7%.
30
Qiu, Xian-Hao, and 邱顯皓. "Design of Automatic Feeding Machine for Rod-Shape." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/33nh38.
Full textAbstract:
碩士國立彰化師範大學
工業教育與技術學系
105
The purpose of this study is to improve the feeding system of the rob-shape automatic packing machine. Present the rob-shape automatic packing machine all use motor to drive four-bar linkage mechanism to achieve automatic feeding, but this feeding system can cause noise, and the process of the operation requires a greater torque to prevent components stuck in the storage box. So the internal mechanism is susceptible to damage by stress influences, and the adjustment is very complicated when renew the damaged components. Based on this disadvantages, first, we draw the three-dimensional figure of the old rod-shape automatic packaging machine feeding system, and use the finite element analysis method for structural analysis to understand the feeding system defects of old rod-shape automatic packaging machine. Finally, we use the feed system of machine tool to replace the four-link mechanism of the old rod-shape automatic packaging machine feeding system to reducing the noise emitted when materials transport, and decrease the damage of internal mechanism torque in order to avoid the disadvantages of often replace components. Combining sheet-metal working, with the motor, lead screw and linear bearings, then tests action of the improved new feeding system to fulfill the design of system.
31
Wu, Wen-Xuan, and 吳文軒. "A Study on Funnel Feeding Automatic Auxiliary Mechanism." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/vn99ss.
Full textAbstract:
碩士義守大學
機械與自動化工程學系
107
Due to manpower reduction in army, the manufacturing process in military plants should be introduced and implemented automation equipment for more flexible and smart production in military plants. In the case study factory, it is found that the present production line on wet activated charcoal dip dyeing is manual charging by a worker standing on a 1m high platform. The improvement of production process has been proposed in this study. The aim of this research is to design an innovated combined automation machines using electrical motor driven cargo lift and landscape orientation funnel. Worker stands on the ground and a smart funnel auxiliary mechanism designed in this study is capable to set up weighting, lifting and charging-discharging on the transportation machines. Then, the drying operations on wet activated charcoal can be accomplished to save production time, decrease the manpower, increase production and improve quality. In addition, computer simulation on automation and manual operations were conducted to compare the manufacturing process time. An automatic charging-discharging system developed in this research can apply to other military plants. Study results demonstrated that implementation of new automation equipment would increase the cost at the beginning but reduce the operation time and manpower. It is also found that automation mechanism would increase the human-machine collaboration and improve the yield rate and production quality.
32
王學獅. "Automatic Wire-feeding System Using Water-leading in WEDM." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/33482514372364388962.
Full text
33
Wang, Chih-Wen, and 王志文. "Development of an Automatic ResidualSensing and Precision Feeding Machine." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/02170240067862545837.
Full textAbstract:
碩士國立臺灣大學
生物產業機電工程學研究所
99
Ornamental fish market is about 6 billion a year. A vital equipment for ornamental fish rearing, commercial feeders usually could not satisfy the needs for precise control of the feeding rate. Therefore, it is our purpose to develop a new feeding machine to solve the problem by developing a better feed delivering mechanism and by incorporating novel sensing techniques to detect residual feeds on the surface of water. A vertical screw mechanism is developed which could not only bring the feed out of the container actively to control the rate of feeding, but it could also reduce the influence of the remaining feed in the container, eliminate the bridge effect, and be programmed to rotate set turns precisely. As a result, the feeding rate is greatly improved over the three commercial feeders tested. For 0.3 cm diameter feeds, the variation of the feeding rate is 0.015 gram, which is one-thirteenth that of the commercial feeder. For powder feeds, the variation of the feeding rate is 0.012 gram, one-twelfth that of the commercial counterpart. The drift of the feeding rate is 0.002 gram for 0.3 cm diameter feeds and is 0.008 gram for powders. The drift of feeding rate is at least 0.125 gram for commercial feeders. An infrared sensor is used to detect the reflected signal off the feed floating on water. The residual feed is constrained in a ring, which has a cone-shaped underwater extension to prevent the residual feed to flow away, so that to ensure all residual feed could be detected by the sensor. The novel feeding mechanism and the residual feed monitoring technique developed in this research could be implemented in ornamental and food fish industries for more accurate feeding.
34
Liao, Ren-Yi, and 廖仁毅. "Development of an Automatic Feeding and Un-feeding Controller for the Superintensive Water Recirculating Eel Production System." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/11628849700675143944.
Full textAbstract:
碩士國立臺灣大學
農業機械工程學系研究所
88
The purposes of this study are to derive an equation for the calculation of feeding rate using a circular spreading feeder, and to develop an intelligent feeding and un-feeding controller. The circular spreading feeder consists of hopper and a rotating disc and a gap (D) in between. A fixed scraper is installed from outside of the disc. No direct contact in between scraper and the disc, however, the distance is shorter than the radius of the pellet of the feeds. Feeds were dumped on to the disc and form an inner circle on the disc. The scraping area formed by the scraper and the disc named outer ring. The area between inner circle and outer ring is the middle ring. The feeding behavior of circular spreading feeder can be divided into two periods: steady and transient states. The steady state has constant feeding rate and the transient state has an increasing feeding rate before reaching steady state. In steady state, the direction of rotating disk (counter clockwise or clockwise) and the angle between scraper and the projected diameter have no influence on feeding rate (W). However, we found that W is highly related to the width of the outer ring (the projected length (L) of scraper along diametric direction), the gap (D) between the bottom ends of hopper and rotating disc, and the diameter of feeds (d). W is highly related with the area of the outer ring which can be expressed as L/Ln L, mathematically. Increasing D and d will also lead to the increase of W. The total transient time T is related to the thickness of the middle ring. The total amount dumped during T is affected by D, thickness of middle ring and d. Total amount of dumping feeds can be calculated by given conditions such as L, D, d and total feeding time including both transient and steady states. The capability of detecting when to stop feeding is the key to the success of the development of the intelligent feeding and un-feeding controller, which consists of a photoelectric sensor and a soft-PLC (FAMA, Mon-Lee Corp.). Seven governing parameters were provided in the control algorithm making the controller robust and easy to use. An equation was developed to quantify the amount of dumping of a rotating disc type automatic feeder frequently used in indoor aquaculture. un-feeding controller can reduce the amount of waste feeds and labor. The quantifying equation of feeders and the un-feeding controller can be integrated with the re-filling system, also developed in our lab, to form a complete automatic feeding system.
35
劉家福. "Development of an Automatic Feeding Mechanism for Vegetable Seedling Transplanter." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/04060980523734336837.
Full textAbstract:
碩士國立中興大學
農業機械工程學系
87
Under the governmental policy pursuant to automation of agricultural cultivation equipment, the technologies to achieve the automation of vegetable seedling have mature, and enter the phase of extensive application in Taiwan. The demand for the manufacturing an enhanced transplanting equipment system has grown in the agriculture industry. The objective of this research project is to design and develop a feeding mechanism as an element of an automated transplanting seedling system. This continuous feeding mechanism is designed to automatically retrieve the seedlings from an elasticized tray with high flexibility; the tray is compatible to the system and has been widely used domestically. After the seedlings are retrieved, they are placed in the planting mechanism through a holding roulette. Development of a continuous, automated feeding mechanism greatly enhances the seedling feeding function of a vegetable transplanter. This research provides useful information regarding the integration of the continuous seedling retrieving mechanism and seedling feeding mechanism in an automatic vegetable transplanter system. The results of the experiment indicate that the subject seedlings feeding mechanism achieves the continuous, automatic feeding function the successful efficiency is 97.2% at the seedling-retrieving rate of 34 plants per minute.
36
Chuang, Yu-Hsiang, and 莊渝翔. "The development of product traceability, automatic water monitoring systems, and automatic feeding for grouper aquaculture." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/xbjpzg.
Full textAbstract:
碩士國立屏東科技大學
工業管理系所
106
With the advanced culture technology, aquaculture is an important economic industry in Taiwan but is currently blocked due to relying on experiences and the trend of labor aging resulting to sustainable aquaculture problems in terms of lost competition, increase of energy cost, and quality and quantity uncertainty. This study devises an integrated system in terms of traceability, water monitoring, and feeding systems to bridge the cording system of Traceability Aquaculture Product Systems 3.0 (TAPS) in Council of Agriculture. Use of this integrated systems, all culture activities regarding to safety of aquaculture product, traceability, sustainability, and transparency are assured through the designated systems on the aspects of automatic water monitoring systems with sensor devices and feeding systems. Located in Fangliao, Pingtung, the field of grouper is selected as the experimental subject, in which the growth phases and culture materials are traced in the designated data base linking to operational activities in breeding processes. Results presented in this study experiments not only solves the inconvenient system problem in use of TAPS but also can help better understand for culture farmers in tracing and deciding culture situations on platforms. Keywords: grouper, traceable agricultural products, water monitoring systems, feeding systems.
37
Tsou, Pei-Yen, and 鄒沛言. "Automatic Aligning System for Dual-Feeding Rotary Broaching Tools on Lathes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/69917435842051993049.
Full textAbstract:
碩士國立中興大學
機械工程學系所
99
This thesis designs an automatic aligning system for tooling of dual-feeding rotary broaching. Rotary broaching is a method for machining non-circular holes. In order to reduce the cutting force in broaching during the process, usually a larger pre-drilled hole interfering designed geometry is generated. The pre-drilled overcutting decreases the precision of the desired hexagonal hole. Dual-feeding process is thus introduced to fix the problem by dividing cut volume into two equal parts in a two stage broaching process, which reduces the cutting force and increases precision. Because both of the two stage hexagonal holes could not be aligned automatically, the dual-feeding method can not be applied on a lathe. As a result, this research designs a mechanism and the corresponding applying method, which enable dual-feeding rotary broaching applicable on a lathe automatically. This research begins with designing an auto-aligning mechanism. In order to control the angle position of entering broach, a fixture is designed to enable a slab to have a contact with an edge of the broach to place the broach at a fixed angle position. With such setup, the broach will not be displaced during the engagement for broaching. When the broach contacts the workpiece surface, the workpiece will push the cam connected to the slab, which will be detached from the edge of the broach. And the broaching can begin at a prefixed angle position. After the broaching stops and the broach retracts, the slap touches the broach again due to the spring recovering force while the broach leaves the workpiece surface. With this aligning method, the first feed and second feed would have the same phase of angle positioning. According to the function of the mechanism, dual-feeding processes can be planned for a study on cutting characteristics. The influences due to the dimension variations of the broach, feeding rates and the sizes of pre-drilled holes on the broaching process are investigated. The actual machining is tested on a lathe. The material of workpiece for testing is Ti6Al4V and aluminum. Tungsten carbide is selected for the material of broaches. The testing results show that the aligning system is precise and reliable.
38
Wang, shih-kai, and 王詩凱. "Design and Implementation of Networked Automatic Feeding Machines Using in Aquaculture." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/g2r77y.
Full textAbstract:
碩士國立臺灣海洋大學
電機工程學系
107
The goal of this thesis is to improve the performance of a ready-made automatic feeder. We try to resolve the problems that the feeder cannot provide precise feed weight and cannot control the feeding location. In our approach, the feeding location is determined by a stepper motor controlled by a PID controller. On the other hand, by experiments, we control the feed weight by open-loop control. For reliability, the controller is implemented by a PLC. Key word: automatic feeder, PID controller, feeding, fixed-point feeding
39
Yang, Ming-Da, and 楊明達. "Development of Automatic Electrode Feeding System of Microholes Machining by Micro-EDM." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/rg3v48.
Full textAbstract:
碩士國立臺北科技大學
製造科技研究所
94
This research mainly used the mechanism of automatic microelectrode feeding system to achieve mass production of microholes by EDM. This dissertation proposed two kinds of spindle mechanism, cylindrical shaft holder spindle and automatic microelectrode feeding system respectively, that can chuck micro electrode of diameterψ100um to manufacture microholes by EDM. Cylindrical shaft holder spindle mounted on V-shaped, can hold a micro rod tool fabricated by diamond grind, to machine micro holes directly by EDM. Automatic microelectrode feeding system, using mechanism of propelling pencil to hold tungsten micro rod electrode, that we don’t need to change micro electrode while micro tools were worn out. Using cylindrical shaft holder spindle to fabricate micro holes by EDM, the experimental results show that the diameter of microholes inlet is the diameter of micro tool ﹢20±5μm. Micro driller is adaptable to machining of high aspect ratio hole, and micro wand is adaptable to machining of low aspect ratio hole. On the other hand, in automatic micro electrode feeding system continuous machining 100 microholes, the dimensions of micro holes are about 115-125 um in diameters. The differences between inlet and outlet are almost 15 um. The length of micro electrode wear is about 1000um. Micro holes could be machined continuous until the micro rod electrode is worn out. The system is possible to achieve mass production of micro holes by EDM at low cost.
40
Yang, Sheng-Yu, and 楊昇佑. "Development of an Automatic Wire Feeding System for Wire-cut Electric Discharge Machining." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/62433898849116989254.
Full textAbstract:
碩士國立臺灣大學
機械工程學研究所
93
The time consuming and tedious wire threading in Wire Electrical Discharge Machining (WEDM) before the start of the operation is always needed. In addition, wire breaking is inevitable during the machining process, and the chance to re-thread the wire is encountered from time to time. Hence the automatic wire feeder (AWF) is an essential unit closely related to machining efficiency and automation in WEDM. Despite various existing foreign and local patents, a new-type AWF based on modular design is developed in this thesis. Several units including wire receiving motor unit, wire cutting and shaping mechanism, motor positioning unit, etc. which have patent potential are proposed. The incorporation of special design cutter with electrical discharging for wire disconnecting while at the same time applying an appropriate tension on the wire during the wire disconnecting process results in very satisfactory profile wire. Besides, the disconnection point along the wire can be precisely controlled. The problem of too long and fine wire at the tip by using the heating and pulling strategy is prevented. The FEM is applied to simulate the fluid flow field and velocity within the pipe so that the proper shape of the wire guiding pipe can be determined. The developed system has less mechanical parts as compared to those of the existing systems. Hence, it is expected to be cost effective and easy for maintenance. In addition, the developed system is flexible, and it can be implemented on various wire-cut electrical discharge machine (Wire-cut EDM). The programmable logic controller (PLC) is taken for sequence control of the threading process. The associated software is written by the use of assembly language. Experiments are conducted to verify the threading performance of the developed system. It is found that the success rate is 84% ~ 96% for the 50~100 mm thickness workpiece having a 1mm in diameter initial hole. It is 79% ~ 91% when wire threading is carried out at the position of wire breaking. It is reduced to 76% ~ 86% when there is no workpiece in between the upper and lower wire guides. This performance is more or less comparable to the existing AWF. In conclusion, the AWF is successfully developed, and contribution to local EDM industry is expected.
41
Shen, Ta-Chun, and 沈大鈞. "Study on Automatic Feeding and Capping Devices for the Corn Silage Packing Barrel." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/yusedu.
Full textAbstract:
碩士國立中興大學
生物產業機電工程學系所
102
Herbage is the main food for the animals such as cattle and goat, and most herbage relies on imports for pasture in Taiwan. Hence there has been proposed to produce corn silage as forage alternatives. The quality of bag corn silage is stable and long-term preservable. But the bag corn silage is packed in factory, so the corn can''t be packed immediately after harvested. And its packaging operation requires extra labor cost. Therefore, in order to improve those defects, National Chung Hsing University designed an automatic mobile packing system. However, the system has no suitable packaging container and feeding system, so the objectives of this study are to design a corn silage barrel with automatic capping devices, and to design a feeding system associated with a swinging motion. The design of corn silage barrel and feeding system are completed in this study, the capacity of barrel is about 28.55 liters. After packing corns of 20 kg, the silage density is about 0.70 g/cm^3. The design of lid facilitates an easy opening and capping mechanism using the sliding latch. Then, this study applies the finite element method using commercially available analysis software, ANSYS, to analyze the barrel, and the results show that the safety factor of barrel and related parts are all above 1.5. In addition, the automatic capping devices have been tested by a prototype of corn silage packing machine. Testing results greatly increase the possibility of using the lid. This study completes the design of a feeding system as well. The feeding system implements a discharge port using swinging movement associated with a swing rod connected with gear mechanism. The swinging mechanism is able to use the conveyor''s power directly.
42
Shih, Chia-Dung, and 施啟棟. "A Study on PLC Application to Automatic Fabric Feeding System for Shoe Manufacturing." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/pmx5sv.
Full textAbstract:
碩士國立彰化師範大學
電機工程學系
107
Abstract In the traditional shoe manufacturing process, it requires a lot of labor in a production line. Labor cost is increasing year by year. The automation system is able to reduce the labor cost. Moreover, it can deliver consistency quality and monitor production status. It is imperative to use automation systems in the shoe manufacturing process. This research proposes an automatic fabric feeding system by using the Mitsubishi Q series PLC as the sequence controller. Apply a servo X-Y table to control the raw material and feed in the raw material. Adopt a pneumatic cylinder to pick and place the material on the conveyor and transfer the material into next process. Besides, the A/D and D/A converter modules accompanied with digital control proportional pressure-regulator to monitor the air pressure, deliver precise air pressure control of the pick and place motion to suit different materials. After experiment, the automatic fabric feeding system, which proposed in this research, is stable and reliable; it can increase the output value and decrease the labor cost, which achieve the desired results. Keywords: Automatic fabric feeding system, servo X-Y table, Mitsubishi Q series PLC, A/D module, D/A module, digital control proportional pressure-regulator.
43
Deming, Justine Adams. "Farm- and Cow-Level Effects on the Behavioral Patterns of Dairy Cows Milked with Automatic Systems." Thesis, 2012. http://hdl.handle.net/10214/3700.
Full textAbstract:
The objective of this thesis was to determine the effect of housing and feeding management and cow characteristics on the behavioral patterns of cows in automated milking systems (AMS). In a first study, increasing frequency of feed delivery from 1 to 2x/d for cows milked in an AMS resulted in longer lying duration. In that study, lame cows milked less frequently, had increased lying durations and more frequent lying bouts. In a second, cross-sectional study of 13 AMS farms it was found that cows had longer lying durations when given more space at the feed bunk and when their feed was pushed up more frequently. Milking frequency increased as cows/AMS decreased. Milk yield increased with space at the feed bunk. Overall, these results suggest that feeding management, robot and bunk-space availability, and health status affect the behavior and production of AMS-milked cows.Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) and the Canadian Bovine Mastitis Research Network (CBMRN)
44
Qwabe, Olwethu. "The adoption of interactive voice response for feeding scheme programme monitoring." 2014. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001592.
Full textAbstract:
M. Tech. Business Information SystemsThe Department of Education should be contributing to the South African government's objective to provide a better life for all. However, the provision of education to all is hampered by the fact that a significant majority of the South African population is plagued by high levels of poverty resulting in learners attending school without having had a nutritious meal. Consequently, the provision of food in South African schools, as a lead project of the Reconstruction and Development Programme, referred to as the 'feeding scheme', was introduced. This project aimed to improve both health and education by fighting malnutrition and improving the ability of learners to concentrate during lessons. The South African government provides the funds for the school feeding programme for learners from primary to secondary schools and the Department of Education spends a large amount of money on this programme nationally. However, there is no precise data showing how successful the feeding programme is. In order for the Department of Education to meet its objectives, it is recommended that an efficient system be developed for keeping records of all the reports. It is thus critical to explore the potential use of technologies, such as interactive voice response systems. The interactive voice response solutions have the potential to assist the Department of Education in monitoring and evaluating the school feeding programme in timely, accurate and reliable ways. This research aims to evaluate how this interactive voice response system can be implemented to effectively enhance the monitoring of the feeding programme in South African schools.
45
Wagner-Storch, Angela M. "Feeding, milking and stall use behavior of cows housed in a 4-row freestall barn and milked with a herringbone parlor or automatic milking system." 2002. http://catalog.hathitrust.org/api/volumes/oclc/50062816.html.
Full text