Relevant bibliographies by topics / Datalogger

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Datalogger'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 March 2023

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Journal articles on the topic "Datalogger"

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López-Vargas, Ascensión, Manuel Fuentes, and Marta Vivar. "Evaluation of Long-Term Performance of a Solar Home System (SHS) Monitoring System on Harsh Environments." Sensors 19, no. 24 (December 11, 2019): 5462. http://dx.doi.org/10.3390/s19245462.

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Dataloggers installed in rural regions of developing countries need to be autonomous, robust, and have good recording capacity as they may be exposed to harsh environmental conditions. An extremely hot, dry, and dusty climate can imply additional wear and tear toequipment. A test procedurewas designed and run in a confined space to control climate conditions to test the datalogger. An outdoor campaign lasting more than three years was performed at the Instituto Madrileño de Estudios Avanzados (IMDEA) Water Institute, in Alcalá de Henares (Madrid, Spain) and at the Escuela Politécnica Superior (EPS) Linares (Jaén, Spain) to test the low-cost datalogger under real conditions. The results demonstrated that it was robust and endured extreme weather conditions. In order to avoid the loss of data, a new version with a redundant system based on an SD card was implemented and tested under real conditions.
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Dixon, Mark. "Datalogger demonstrates electromagnetic induction." Physics Education 40, no. 2 (February 23, 2005): 125–26. http://dx.doi.org/10.1088/0031-9120/40/2/f07.

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Silva, Brayam Moreira Da, and Mario Mollo Neto. "Seleção de sensores para ensaio de performance térmica de telhas para galpões de aves." Research, Society and Development 9, no. 11 (November 28, 2020): e62491110279. http://dx.doi.org/10.33448/rsd-v9i11.10279.

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Um dos maiores problemas que o Brasil enfrenta na produção de ovos e de frango de corte é o fator climático, pois o Brasil é um país tropical possuindo condições climáticas inadequadas para a produção dos animais, fazendo com que o desempenho das aves seja menor. Considerando que no presente artigo, espera-se poder selecionar sensores que, no futuro, permitam confirmar se telhas termoacústicas, em substituição às telhas de cerâmicas ou telhas de fibrocimento em galpões legados, podem trazer melhor conforto térmico e reduzir o estresse para as galinhas poedeiras, possibilitando aumento na produção de ovos e diminuição dos efeitos estressores. Estes sensores de baixo custo, produzidos para uso com microcontroladores Arduino, foram selecionados para uma comparação com um datalogger comercial. Para verificar a relação entre o datalogger e os sensores eletrônicos, construíram-se os gráficos de dispersão, comparando as leituras dos sensores medidos com o padrão utilizado, e avaliou-se o percentual da variância entre as temperaturas e umidades medidas. A avaliação da correlação entre as leituras foi feita com base nos valores dos coeficientes de correlação linear “r” de Pearson. Foram escolhidos os sensores em que as médias foram iguais, onde o teste t crítico bi-caudal foi menor que o t estatístico e conforme confirmação da correlação de Pearson forte. Assim, concluiu-se que estes sensores escolhidos poderão ser utilizados em experimento futuro sem grandes investimentos em dataloggers devido à sua comprovada equivalência.
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Khadidja, Benabed, Boudghene Stambouli Amine, and Benabadji Noureddine. "Prototyping a Dedicated Photovoltaic System Datalogger." TELKOMNIKA Indonesian Journal of Electrical Engineering 16, no. 3 (December 1, 2015): 488. http://dx.doi.org/10.11591/tijee.v16i3.1641.

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Solar power is a renewable energy seen as one of the primary sources for electricity production in order to meet our daily needs. The conversion operation is sensitive and non-fault tolerant that can occur during operation of the system that affects its overall performance. We propose in this present paper a compact, low power and low-cost datalogger for the control and the monitoring based on a survey measures of five important physical parameters in the management and monitoring of the functioning of an electric system based on solar panels. These measures will be carried out at regular intervals, configurable through a PIC18F4520 microcontroller and stored in a large capacity memory type SD card.
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Tyack, Peter L., and Cheri A. Recchia. "A datalogger to identify vocalizing dolphins." Journal of the Acoustical Society of America 90, no. 3 (September 1991): 1668–71. http://dx.doi.org/10.1121/1.401908.

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Choi, Martin M. F., Pui Shan Wong, Tak Pong Yiu, and Mark Case. "Application of datalogger in observing photosynthesis." Journal of Chemical Education 79, no. 8 (August 2002): 980. http://dx.doi.org/10.1021/ed079p980.

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Mattoli, V., B. Mazzolai, A. Mondini, Stefano Zampolli, and P. Dario. "Flexible tag datalogger for food logistics." Sensors and Actuators A: Physical 162, no. 2 (August 2010): 316–23. http://dx.doi.org/10.1016/j.sna.2010.01.028.

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Mattoli, V., B. Mazzolai, A. Mondini, Stefano Zampolli, and P. Dario. "Flexible Tag Datalogger for Food Logistics." Procedia Chemistry 1, no. 1 (September 2009): 1215–18. http://dx.doi.org/10.1016/j.proche.2009.07.303.

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Nemali, Krishna S., and Marc W. van Iersel. "(354) A Novel Automated System for Irrigation and Simulating Drought Stress in Potted Plants." HortScience 40, no. 4 (July 2005): 1017D—1017. http://dx.doi.org/10.21273/hortsci.40.4.1017d.

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We have developed a completely automated irrigation system that measures and maintains substrate volumetric water content (θ) at a target level for any length of time. Advantages of this system include complete automation of irrigation and simulation of precise levels of drought stress for potted plants. This system uses ECH2O moisture sensors interfaced with a CR10X datalogger and solenoid valves connected to the datalogger by a SDM CD16 AC/DC controller. The datalogger measures the θ of the substrate hourly. When the θ of the substrate drops below the set point, the datalogger opens the solenoid valves, which results in irrigation. Substrate θ is maintained at a constant level as the datalogger is programmed to increase θ by 2% to 3% during each irrigation. When the system was validated for its accuracy, we determined that the θ measured in the substrate within the range of 0.15 to 0.35 m3·m-3 was close (2% to 3%) to the θ determined by the conventional volumetric analysis. The daily average θ maintained in the substrate was slightly higher (within 3%) than the target level. Using this system, we were able to maintain four distinct levels of substrate θ for a prolonged period (40 days), regardless of differences in plant size and environmental conditions. Significant increases in number of irrigations, total water-use, and transpiration rate of impatiens, salvia, vinca, and petunia were noticed with increasing target θ of the substrate. For all species, highest and lowest water-use efficiency (WUE) were seen at 0.09 and 0.32 m3·m-3, respectively, while WUE was not different between 0.15 and 0.22 m3·m-3.
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Castello, Marcelo, and Rafael Beltran Oliva. "Sistema de medición con dos conexiones Modbus vinculado a través de un enlace MQTT/TLS a un servidor remoto: detalles internos y primeros resultados." Elektron 6, no. 2 (December 15, 2022): 120–28. http://dx.doi.org/10.37537/rev.elektron.6.2.160.2022.

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Este trabajo presenta un sistema de medición para equipamiento de energías renovables que incorpora dos conexiones basadas en el protocolo abierto Modbus (RTU/Serial hacia módulos internos, TCP hacia el exterior) y logra la vinculación entre el módulo datalogger y un dashboard centralizado remoto. La instalación y puesta en marcha reciente de instrumentos de alta calidad hacen posible reunir información confiable y a la vez contar con un monitoreo y persistencia remota de los datos. El conjunto toma información de viento utilizando sensores Thies instalados en la misma torre de un aerogenerador e información de corriente y tensión producida por un conjunto de paneles fotovoltaicos y aerogenerador que cargan un banco de baterías y suministra energía a un invernadero. A su vez, se construyó y programó un módulo auxiliar externo para medición de temperatura y humedad en el invernadero, comunicado por RS485 y protocolo Modbus RTU con el datalogger principal. El datalogger envía los datos a través de Modbus/TCP a una Raspberry Pi 4B que convierte este protocolo a MQTT TLS para dar seguridad a la transmisión de los datos, ya que el servidor con el dashboard se encuentra fuera de la red de campo. El análisis de performance del sistema híbrido eólico-solar de baja potencia es posible debido a la disponibilidad y persistencia de los datos en el servidor remoto y localmente en la tarjeta CF del datalogger.
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Dissertations / Theses on the topic "Datalogger"

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Rezek, Petr. "Bateriově napájený analogový datalogger." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217568.

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The diploma thesis deals with the questions of battery powering, measuring of analog physical values using microcontroller and recording of data on a memory SD card Bibliographic reference: REZEK, P. Battery powered datalogger. Brno: Brno University of Technology, Faculty of Electrical Engineering and Communication, 2008. 65 p. Supervisor: Ing. Zdeněk Bradáč, Ph.D.
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Orávik, Tomáš. "Datalogger s rozhraním Ethernet." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-221127.

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Thesis deals with Datalogger with Ethernet interface controlled by DISCOVERY Kit STM32F429. Datalogger is equipped with eight digital inputs and three analogue inputs. The measured data are saved on the SD card. The Ethernet interface module is designed using LAN8720A from Microchip.
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Štábl, Martin. "Datalogger pro stavební konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316377.

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This work deal with developing dedicated autonomous device for data collection. The work describes the approaches how to design that. Solve choosing of the sensor taking into his properties for this device. And regard on the comparison with similar devices on market according behavior and function. General concept of the suggested datalogger. The thesis contains hardware and software equipment of this device.
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Novobilský, Petr. "Nezávislý datalogger s USB připojením." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219276.

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This work deals with design and construction logger capable measure temperature and relative humidity value and save them. Work also solution maximize batery life and number of record storaged in bulit-in flash memory.
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Bráblík, Radim. "Datalogger pro sběrnici typu Profibus." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218374.

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This thesis deals with creating application Datalogger for PROFIBUS. Describes communications standard Profibus, PLC and PC communication via PROFIBUS, API used for Profibus-PCI card, used programming language and development tool, a description of graphic and software parts of developed application Datalogger and finally describes the testing of developed applications datalogger.
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Románek, Karel. "Nezávislý datalogger s USB připojením." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219113.

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This thesis treats concept of autonomous temperature, relative humidity and pressure USB datalogger. Also there is explained datalogger function, hardware design with respect on device consumption and design of chassis. Furthermore, there is described communication protocol for control and reading out data by the PC. Furthermore, there are described firmware drivers for some used components and modules for USB communication, RTC and data compression. Lastly there is described software which is used for datalogger configuration and data read out.
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Mehalingam, Senthilkumar. "Ontology based code generation for datalogger." Diss., Online access via UMI:, 2006.

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Doležel, Jiří. "Rychlý datalogger s galvanicky oddělenými měřicími kanály." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376915.

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Master‘s thesis deals with analysis solutions and construction of the devices for data collection. At the beginning, they describe the basic types of devices for data collection. In other parts of the work is compared few commercial devices for data collection, under which the requirements will be selected on the proposed device for data collection. In other chapters of the work devoted to the design of schemes and selecting components for their manufacture. The last chapters are devoted to describing the design of device for data collection.
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Maio, João Pedro Santiago. "Desenvolvimento de um datalogger baseado em pendrive USB." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/4486.

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Mestrado em Engenharia Electrónica e Telecomunicações
A necessidade de registar dados de vários acontecimentos e recolher medidas efectuadas por sensores é comum a diversas aplicações. De forma a facilitar o seu registo e recolha de dados em áreas como a saúde, indústria, domótica, meteorologia e outras, foram desenvolvidos mecanismos analógicos e, mais recentemente, digitais para suprir essas necessidades, vulgarmente designados por DataLoggers. Um DataLogger consiste num dispositivo que recebe dados de um ou vários sensores, processa esses dados e finalmente os armazena em formato digital. Este trabalho tem como objectivo o desenvolvimento de um dispositivo genérico de armazenamento de dados que permita uma fácil recolha dos mesmos. Assim, a ligação com os sensores poder ser efectuada com vários protocolos série e durante o processamento dos dados é inserida uma etiqueta temporal relativa à sua recolha, para que os dados possam ser sincronizados com os dados de outros sensores. No final são armazenados numa PenDrive USB genérica. Embora não seja focado para uma aplicação específica, o DataLogger desenvolvido terá uso imediato no projecto de investigação denominado INSHORE financiado pela FCT.
The need to record data from various events and collect measurements from sensors is common to many applications. To facilitate data recording in areas such as health, industry, home automation, meteorology among others, analog and, more recently, digital devices (generally denominated DataLoggers) have been developed to overcome these needs. A DataLogger is a device that receives data from one or more sensors, processes and, finally, stores it in a digital format. This work aims to the development of a generic device for storing data which is very flexible and of simple operation. Therefore, the connection with the sensors will consider different serial protocols. During the processing stage, a time tag is inserted into the data for time synchronization with other sensors. The data storage is made in a generic USB PenDrive. Although not focused on a specific application, the developed DataLogger has immediate use in the FCT research project named INSHORE.
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Nygårds, Erik, and Martin Oliw. "Utformning och installation av internetuppkopplad datalogger för kontinuerlig sintringsugn : Utveckling och implementation av Raspberry Pi baserad internetupkopplad datalogger, samt framtagning av lösningsförslag för viktmätning." Thesis, Linköpings universitet, Maskinkonstruktion, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176753.

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Höganäs AB has a customer center where they perform their cutomers production processes usingtheir own metal powder, thereby gaining knowledge of how the powder behaves and how it can be improved. The powder is usually pressed, and then sintered in a sintering furnace where temperature and atmosphere composition gives the component its desired characteristics. Höganäs AB didn’t save the parameters from these process’s in a easily accessible way, some values were not saved at all. To increase understanding of these parameters impact on the produced detail they wanted these parameters collected and stored in the cloud. They also wanted solution ideas and concepts for implementation of weight measuring on both the in- and output side of the furnace. This project used Ulrich & Eppinger’s product development method, modified by performing continous testing parallell to the design process. The project was also separated into three parts worked on simultaneously. Computer architecture, physical casing and weight measuring. To compile and upload to the cloud a Raspberry Pi 3 B+, a micro processor, was used. It connected via WiFi to upload files to OneDrive. The measured values from the furnace were gathered from the furnace’s PLC via OPCUA and a gas measuring unit via serial communication. Because of the use of metal powder there was conductive dust in the air which could lead to leakage currents and short circuiting if it were to gather on the processor unit. Hence the dust had to be keptaway. The casing was therefore designed to be relatively airtight. The casing was made with 3D-printed PETG. The seal utilized PETG’s elasticity to elastically deform an elevated seal, and thereby sealing the casing, without having to produce more components than a bottom and a lid. The cable feedthrough used the cables elastic deformation to seal. A screen was implemented to start and stop logging processes, which was also sealed using an overlapping lip around it’s rim. The logging of the furnace parameters was split in two logs, a day-log and a job-log. The daylog took measurements continously over a day in long intervals, 30 minutes. At the end of the day a log was uploaded for that day, hence the name. The job-log had to be started manually via the screen and was used to take measurements with higher frequency during a production series. Log files of both types were uploaded to a OneDrive folder. The product was tested with a number of final tests, both for the casing and the software. The casing was tested primarily for the numerical requirements set in the requirements specification. While the software was tested over a longer period of time to ensure functionality.The final product was a sealed, robust, easily disassembled and cable strain relieved 3D-printed box with a 3.5 inch touchscreen and a connected keyboard. It collected the desired data and compiled it to log files readable by programs such as Microsoft Excel. The weight measuring concept produced was a self-made solution with load cells under the loading ramp. The weight is then measured automatically during the regular loading process without disrupting it. Two backup solutions were also put forward.
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Books on the topic "Datalogger"

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C, Sansen Willy M., and Puers R, eds. Design of wireless autonomous datalogger IC's. Dordrecht: Springer, 2005.

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Cousley, Royston Matthew. The design construction and tecting of a portable datalogger. [S.l: The Author], 1999.

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Avenati, Olaf. Datalogie: Formes et imaginaires du numérique. Paris]: Éditions Loco, 2016.

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Design of Wireless Autonomous Datalogger IC’s. Berlin/Heidelberg: Springer-Verlag, 2005. http://dx.doi.org/10.1007/1-4020-3209-9.

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Sansen, Willy M., Wim Claes, and Robert Puers. Design of Wireless Autonomous Datalogger IC's. Springer London, Limited, 2006.

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Claes, Wim, Robert Puers, and Willy M. Sansen. Design of Wireless Autonomous Datalogger IC's. Springer, 2010.

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Book chapters on the topic "Datalogger"

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Fertitta, Gioacchino, Antonio Di Stefano, Giuseppe Fiscelli, and Costantino G. Giaconia. "An Embedded Datalogger with a Fast Acquisition Rate for In-vehicle Testing and Monitoring." In Lecture Notes in Electrical Engineering, 173–84. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0638-5_12.

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Guessarian, Irène, and Marcos Veloso-Peixoto. "About boundedness for some datalog and DATALOGneg programs." In Mathematical Foundations of Computer Science 1992, 284–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/3-540-55808-x_27.

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"datalogger." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 336. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_40279.

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Pantoja, William de Brito, Caio Castro Rodrigues, Katiane Pereira da Silva, Otavio André Chase, Antônio Thiago Madeira Beirão, and José Felipe de Almeida. "Uso de DATALOGGER baseado na plataforma Arduino para o monitoramento de variáveis do conforto térmico." In Ciências exatas e aplicadas: novas descobertas e tecnologias, 102–43. Uniedusul Editora, 2021. http://dx.doi.org/10.51324/86010930.8.

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Conference papers on the topic "Datalogger"

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Kumar, K. S. Rajesh, and H. K. Ravi. "Automotive vibration datalogger." In 2022 IEEE 3rd Global Conference for Advancement in Technology (GCAT). IEEE, 2022. http://dx.doi.org/10.1109/gcat55367.2022.9972044.

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Holik, Michael, Carlos Granja, and Claude Leroy. "Ultra Low Power Datalogger." In NUCLEAR PHYSICS METHODS AND ACCELERATORS IN BIOLOGY AND MEDICINE: Fifth International Summer School on Nuclear Physics Methods and Accelerators in Biology and Medicine. AIP, 2010. http://dx.doi.org/10.1063/1.3295639.

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Nehovski, Nikolay Vasilev, Nikolay Nikolaev Tomchev, Todor Stoyanov Djamiykov, and Katya Konstantinova Asparuhova. "Datalogger for Small Solar Systems." In 2018 IX National Conference with International Participation (ELECTRONICA). IEEE, 2018. http://dx.doi.org/10.1109/electronica.2018.8439590.

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Raichl, Petr, and Petr Marcon. "An IoT-Based Datalogger of Environmental Values." In 2021 13th International Conference on Measurement. IEEE, 2021. http://dx.doi.org/10.23919/measurement52780.2021.9446796.

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Hunar, M. F., E. A. Azrulhisham, K. Hamzani, W. M. Wan Sulong, S. Abdullah, M. J. Mat Basri, and M. A. Dandu. "GSM wireless datalogger of small hydro power generation system." In 2014 4th International Conference on Engineering Technology and Technopreneuship (ICE2T). IEEE, 2014. http://dx.doi.org/10.1109/ice2t.2014.7006256.

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Leiter, Augustin. "DEVELOPMENT OF AUTOMATIC DATALOGGER SYSTEM FOR HEAVY DYNAMIC PENETROMETER." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/1.3/s03.037.

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Akerlund, John, and Jan Ottosson. "A Datalogger and Remote Control for Hybrid Power Systems." In 1987 The Ninth International Telecommunications Energy Conference. IEEE, 1987. http://dx.doi.org/10.1109/intlec.1987.4794595.

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Placencia, Sebastian, Fabian Astudillo-Salinas, Andres Vazquez-Rodas, Luis I. Minchala, and Jhonny Guaman. "Rainfall Intensity Datalogger System. LoPy4-Based Design and Implementation." In the 16th ACM International Symposium. New York, New York, USA: ACM Press, 2019. http://dx.doi.org/10.1145/3345860.3361513.

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Zhu, Xiyuan, WuRong Shih, and Y. Rosa Zheng. "Underwater Datalogger for Accurate Position and Location Estmation and Tracking." In 2019 16th Annual IEEE International Conference on Sensing, Communication, and Networking (SECON). IEEE, 2019. http://dx.doi.org/10.1109/sahcn.2019.8824963.

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De Roo, Roger, Steve Rogacki, Eric Haengel, and Chandler Ekins. "Snowpack time-series ground truth via a low-power datalogger." In 2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS). IEEE, 2017. http://dx.doi.org/10.1109/igarss.2017.8127221.

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Reports on the topic "Datalogger"

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Blackaby, W. B. Purex canyon exhaust fan bearing temperature monitoring system doric 245 datalogger programming. Office of Scientific and Technical Information (OSTI), September 1994. http://dx.doi.org/10.2172/10108592.

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Bendikov, Michael, and Thomas C. Harmon. Development of Agricultural Sensors Based on Conductive Polymers. United States Department of Agriculture, August 2006. http://dx.doi.org/10.32747/2006.7591738.bard.

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In this 1-year feasibility study, we tried polymerization of several different monomers, commercial as well as novel, specially designed and synthesized for this project in the presence of the nitrate ion to produce imprinted conductive polymers. Polymers 1 and 2 (shown below) produced a response to nitrate, but one inferior to that produced by a polypyrrole (Ppy)-based sensor (which we demonstrated prior to this study). Thus, we elected to proceed with improving the stability of the Ppy-based sensor. In order to improve stability of the Ppy-based sensor, we created a two-layer design which includes nitrate-doped Ppy as an inner layer, and nitrate-doped PEDOT as the outer layer. PEDOT is known for its high environmental stability and conductivity. This design has demonstrated promise, but is still undergoing optimization and stability testing. Previously we had failed to create nitrate-doped PEDOT in the absence of a Ppy layer. Nitrate-doped PEDOT should be very promising for sensor applications due to its high stability and exceptional sensing properties as we showed previously for sensing of perchlorate ions (by perchlorate-doped PEDOT). During this year, we have succeeded in preparing nitrate-doped PEDOT (4 below) by designing a new starting monomer (compound 3 below) for polymerization. We are currently testing this design for nitrate sensing. In parallel with the fabrication design studies, we fabricated and tested nitrate-doped Ppy sensors in a series of flow studies under laboratory and field conditions. Nitrate-doped Ppy sensors are less stable than is desirable but provide excellent nitrate sensing characteristics for the short-term experiments focusing on packaging and deployment strategies. The fabricated sensors were successfully interfaced with a commercial battery-powered self-logging (Onset Computer Hobo Datalogger) and a wireless data acquisition and transmission system (Crossbow Technologies MDA300 sensor interface and Mica2 wireless mote). In a series of flow-through experiments with water, the nitrate-doped Ppy sensors were exposed to pulses of dissolved nitrate and compared favorably with an expensive commercial sensor. In 24-hour field tests in both Merced and in Palmdale, CA agricultural soils, the sensors responded to introduced nitrate pulses, but with different dynamics relative to the larger commercial sensors. These experiments are on-going but suggest a form factor (size, shape) effect of the sensor when deployed in a porous medium such as soil. To fill the need for a miniature reference electrode, we identified and tested one commercial version (Cypress Systems, ESA Mini-reference electrode) which works well but is expensive ($190). To create an inexpensive miniature reference electrode, we are exploring the use of AgCl-coated silver wire. This electrode is not a “true” reference electrode; however, it can calibrated once versus a commercial reference electrode at the time of deployment in soil. Thus, only one commercial reference electrode would suffice to support a multiple sensor deployment.
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