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Dissertations / Theses on the topic 'Soil moisture sensors'

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Published: 4 June 2021
Last updated: 26 July 2025

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1

El-Bishti, Magda Bashier. "Determination of soil moisture using dielectric soil moisture sensors : effect of soil temperature and implication for evaporation estimates." Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487102.

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The reliability and accuracy of several sensors that employ the relationship between dielectric constant and soil moisture constant, e, in particular capacitance sensors were investigated. Results obtained from laboratory examinations ,of a Theta probe, TP, selected as a representative model for capacitance sensors, suggested that the sensor output was affected by temperature variations, electrical conductivity levels, spatial variation in sample bulk density as well as the level of compaction of the soil surrounding the sensor's rods. Detailed in situ e data collected usmg capacitance sensors
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2

K, C. Milan. "Applicability of Soil Moisture Sensors in Determination of Infiltration Rate." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1509217475534338.

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3

Ali, Sajjad. "Evaluation of the soil moisture sensors for irrigation scheduling of strawberries." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66964.

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Horticultural producers are in need of efficient and timely techniques for determining crop water requirements. The question of when and how much to irrigate, termed irrigation scheduling, is particularly important for high-value crops such as strawberries (Fragaria ananassa). During the growing season, irrigation scheduling decisions are influenced by climatic variables such as rainfall, temperature and humidity, which directly impact soil moisture levels. A field study was therefore conducted to evaluate two soil moisture sensors for irrigation scheduling of commercial stra
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4

Lindell, David Brian. "Arctic Sea Ice Classification and Soil Moisture Estimation Using Microwave Sensors." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6153.

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Spaceborne microwave sensors are capable of estimating various properties of many geophysical phenomena, including the age and extent of Arctic sea ice and the relative soil moisture over land. The measurement and classification of such geophysical phenomena are used to refine climate models, localize and predict drought, and better understand the water cycle. Data from the active Ku-band scatterometers, the Quick Scatterometer (QuikSCAT), and the Oceansat-2 Scatterometer (OSCAT), are here used to classify areas of first-year and multiyear Arctic sea ice using a temporally adaptive threshold
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5

Proulx, Sophie. "Evaluation of the performance of soil moisture sensors in laboratory-scale lysimeters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ62826.pdf.

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6

Zreda, Marek, Michael H. Cosh, Tyson E. Ochsner, et al. "The Soil Moisture Active Passive Marena, Oklahoma, In Situ Sensor Testbed (SMAP-MOISST): Testbed Design and Evaluation of In Situ Sensors." Soil Sci Soc Amer, 2016. http://hdl.handle.net/10150/621354.

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In situ soil moisture monitoring networks are critical to the development of soil moisture remote sensing missions as well as agricultural and environmental management, weather forecasting, and many other endeavors. These in situ networks utilize a variety of sensors and installation practices, which confounds the development of a unified reference database for satellite calibration and validation programs. As part of the Soil Moisture Active Passive Mission, the Marena, Oklahoma, In Situ Sensor Testbed (SMAP-MOISST) was initiated to perform inter-comparisons and study sensor limitations. Soil
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7

Dias, Ivo Miguel Lourenço. "Caracterização de parâmetros da qualidade do solo através da análise de satélite de observação da terra." Master's thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/29812.

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A realização de mapas da condutividade elétrica aparente do solo, associados ao tipo textural do mesmo é usual, contudo, este é um procedimento que requer equipamento especializado e mão-de-obra para realizar a operação, aspetos que o tornam dispendioso. O uso de imagens de satélite das missões Sentinel 1 e 2, para observação da superfície terrestre, podem contornar essa situação, disponibilizando continuamente informação. Face ao exposto, este estudo tem como objetivo principal avaliar a capacidade dos satélites de observação da Terra para descrever as propriedades do solo. Com amostras textu
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8

Cruz, Tadeu Macryne Lima. "EstratÃgia de monitoramento e automaÃÃo em sistemas de irrigaÃÃo utilizando dispositivos de comunicaÃÃo em redes de sensores sem fio." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5219.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>O objetivo deste trabalho foi desenvolver estratÃgias de monitoramento e automaÃÃo em sistemas de irrigaÃÃo utilizando sensores capacitivos FDR para coletar dados do conteÃdo de Ãgua no solo atravÃs de uma Rede de Sensores Sem Fio (RSSF). Os sensores capacitivos FDR foram desenvolvidos no Departamento de Engenharia AgrÃcola (DENA) da UFC. Foram utilizados neste trabalho 14 sensores capacitivos FDR e um deles passou por um processo de calibraÃÃo em laboratÃrio, onde foi sobreposta uma lÃmpada de 100 watts na amostra de solo indefo
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9

Roque, Wellington. "Desenvolvimento de um multi-sensor eletronico para medida da umidade, temperatura e condutividade eletrica do solo." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259314.

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Orientador: Jose Antonio Siqueira Dias<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-11T13:05:25Z (GMT). No. of bitstreams: 1 Roque_Wellington_M.pdf: 6339203 bytes, checksum: 18872eccdf7c33ab07b778e59d8d3d08 (MD5) Previous issue date: 2008<br>Resumo: A utilização de sensores é indispensável para a coleta de dados na Agricultura de Precisão, pois possibilita um estudo mais aprofundado e preciso do solo. A proposta deste trabalho é o desenvolvimento de um multi-sensor (MS) para realizar a m
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10

Johnson, Peter Morris St Clair. "The Design of an Integrated Soil Moisture Sensor for Agriculture." Thesis, Griffith University, 2007. http://hdl.handle.net/10072/367660.

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This thesis details the design and testing of several soil moisture sensors for use in agricultural applications. The thesis concentrates on capacitive sensors measuring water content by the change in capacitance of two electrodes in direct contact with the soil water, although several other sensor types are investigated. Two electrodes placed in the soil will have a characteristic complex impedance that depends on the sensor configuration, soil structure and soil components. The impedance measured is dependant also on the frequency of the signal used for the measurement. As the frequency is l
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11

Manchikanti, Ujwala. "Evaluation of microwave sensor for soil moisture content determination." [Ames, Iowa : Iowa State University], 2007.

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12

Hymer, Daniel Craig. "Soil Moisture Evaluation Using a Calibrated Sensor Network and a Soil-Vegetation-Atmospheric-Transfer Model." Thesis, The University of Arizona, 1998. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0004_m_sip1_w.pdf&type=application/pdf.

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13

Zeywar, Nadim Shukry 1959. "Effect of sensor placement on the relationships of crop water stress index, soil moisture tension and soil moisture content." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/191981.

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A field experiment was conducted to investigate the feasibility of making one measurement of soil moisture tension/content or crop water stress index (CWSI), and from it determine when and how much to irrigate. Cotton (Gossvpium hirsutum C.V. DPL-90) was planted in a sandy loam soil prepared with an underground drip irrigation system. Measurements of soil moisture tension, soil moisture content, plant temperature, and wet- and dry-bulb temperatures were made. The results indicate that soil moisture tension above 0.30 m and soil moisture content above 0.50 m in the root zone can be used as good
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14

Ahmed, Zubair. "Design of Autonomous Low Power Sensor for Soil Moisture Measurement." Thesis, Linköpings universitet, Elektroniksystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-90634.

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Drought is the most severe disaster compared to other disasters in human civilization and their impacts are serious which can cause hungur, thrist, food shortages, loss of livestock directly effects the human life. The main objective of this project is to develop an early warning system (EWS) [3] for drought indices by using wireless sensor networks (WSNs) which is the only way forward for an on-site monitoring and validation of locally defined drought indices [3].The designed wireless sensor network (WSN) consisting of a sensor unit, a master unit and a sensor power management unit (PMU). The
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15

Ciavarella, Michele. "Volumetric soil moisture evaluation via radio waves propagation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Nowadays technology plays an important role in different sectors of farm management, in particular technologies based on soil moisture assessment have proven to be efficient in helping farmers who need timely techniques to determine crop water requirements. The main weakness of subsurface moisture sensing techniques is usually related both to the lack of cost-effectiveness of measurements and to unsuitable support scales with respect to the extension of the surface to be investigated. In this regard, Wireless Underground Sensor Network are increasingly used non-destructive tool specifically s
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16

Shedd, Mary L. "Irrigation of St. Augustinegrass with soil moisture sensor and evapotranspiration controllers." [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0022869.

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17

Pearcy, Charles M. "The impact of background resolution on Target Aquisitions Weapons Software (TAWS) sensor performance /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FPearcy.pdf.

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Thesis (M.S. in Meteorology)--Naval Postgraduate School, March 2005.<br>Thesis Advisor(s): Kenneth L. Davidson, Andreas K. Goroch. Includes bibliographical references (p. 47-48). Also available online.
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18

Dalel, Muhammad Iqbal Darma. "Non-invasive method for detecting changes in soil moisture using wireless sensor networks." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/51039/1/Muhammad_Dalel_Thesis.pdf.

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There are several popular soil moisture measurement methods today such as time domain reflectometry, electromagnetic (EM) wave, electrical and acoustic methods. Significant studies have been dedicated in developing method of measurements using those concepts, especially to achieve the characteristics of noninvasiveness. EM wave method provides an advantage because it is non-invasive to the soil and does not need to utilise probes to penetrate or bury in the soil. But some EM methods are also too complex, expensive, and not portable for the application of Wireless Sensor Networks; for exampl
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19

Johansson, Marcus. "Soil Moisture Monitoring System Using LoRaWAN Technology." Thesis, Linnéuniversitetet, Institutionen för datavetenskap och medieteknik (DM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105670.

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An IoT device measuring soil moisture to help a municipality improve the work surrounding irrigation is deployed for testing and used by the concerned municipal workers. The IoT device is an initial prototype using Pycom’s LoPy4 with expansion board 3.1 and 3xAAA batteries as power supply. The prototype is not suitable for larger-scale testing due to the size, cost, and power consumption. This thesis focuses on decreasing the cost and size while increasing the battery life for the IoT device.The IoT device is communicating using the LoRaWAN protocol. For the device to be as energy-efficient as
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20

Iwema, Joost. "Opportunities and limitations of the cosmic-ray neutron soil moisture sensor under humid conditions." Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738236.

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21

Hossain, A. K. M. Azad. "Developing a virtual sensor (VS) for mapping soil moisture at high spatial and temporal resolution /." Full text available from ProQuest UM Digital Dissertations, 2008. http://0-proquest.umi.com.umiss.lib.olemiss.edu/pqdweb?index=0&did=1798966761&SrchMode=2&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1258141491&clientId=22256.

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Thesis (Ph.D.)--University of Mississippi, 2008.<br>Typescript. Vita. "December 2008." Committee chair: Dr. Greg Easson Includes bibliographical references (leaves 126-134). Also available online via ProQuest to authorized users.
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22

Gaikwad, Parikshit S. "Chemically deposited optical fiber humidity sensor." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-06092003-141607.

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23

Pearcy, Charles M. "The impact of background resolution on Target Acquisitions Weapons Software (TAWS) sensor performance." Thesis, Monterey, California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2232.

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Approved for public release, distribution is unlimited<br>This study evaluated the sensitivity of TAWS detection range calculations to the spatial resolution of scenario backgrounds. Sixteen independent sites were analyzed to determine TAWS background. Multispectral satellite data were processed to different spatial resolutions from 1m to 8km. The resultant imagery was further processed to determine TAWS background type. The TAWS background type was refined to include soil moisture characteristics. Soil moisture analyses were obtained using in situ measurements, the Air Force's Agricultura
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24

Goran, Kitić. "Mikrotalasni senzori vlažnosti zemljišta zasnovani na komponentama sa distribuiranim parametrima." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2016. https://www.cris.uns.ac.rs/record.jsf?recordId=101479&source=NDLTD&language=en.

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Senzori vlažnosti zemljišta su od ključnog značaja za sisteme za navodnjavanje kojima je moguće uvećati prinose u proseku za 79%. U okviru ove disertacije razvijena su dva senzorska rešenja za merenje vlažnosti zemljišta. Prvi senzor je namenjen određivanju vlažnosti uzoraka zemljišta u neporemećenom stanju. Rešenje je nastalo nadogradnjom standardne opreme za uzorkovanje zemljišta. Za pomenuti senzor konstruisana je kalibraciona kriva kojom je moguće odrediti vlažnost zemljišta sa relativnom greškom ne većom od 2.5%. Drugo senzorsko rešenje je fabrikovano u LTCC tehnologiji, malih je dimenzij
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25

Murad, Mohammad Omar Faruk. "Acquiring In-Situ High-Resolution Soil Information Using Cost-Effective Technology." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/24626.

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Crop production and ecosystem services are greatly influenced by soil’s physical properties (i.e. soil moisture, organic carbon, particle size distribution, bulk density, etc.). This thesis develops new in-situ and laboratory technologies that can accurately measure soil physical properties rapidly and cost-effectively across the cropping fields. The first challenge is to build a soil water monitoring system that can monitor crop water use at the plot level. The study used a plastic buggy system for electromagnetic induction (EMI) surveys. The electrical conductivity data recorded from the EM
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26

Niemeier, James J. "Radio in hydroscience: unconventional links and new sensor possibilities." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/863.

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One can use unlicensed and often very inexpensive radios for unconventional communication (underwater- and underground) links. However, one can go further, and use these radios as sensors rather than communication links. Such communication links and sensors can have important application in hydroscience. While the attenuation of RF signals is high in these mediums, by using the wireless sensor network (WSN) paradigm of multi-hop and retransmission, reliable networks can be formed underwater and underground. One no longer needs to think of RF modules as only a source of data transmission. This
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27

Roux, Julien. "Conception d'un capteur distribué pour la surveillance de l'état hydrique des sols." Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0031/document.

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A cause du développement du smart farming, des études sont à mener sur la distribution de l’instrumentation pour mesurer l’état hydrique du sol en vue de contrôler l’irrigation. Dans le cadre du projet IRRIS, nous réalisons un capteur d’humidité du sol intelligent. Nous allons tout d’abord réaliser le corps d’épreuve de ce capteur. Nous choisissons une mesure capacitive pour obtenir un capteur réactif malgré un coût de réalisation faible. Le corps est cylindrique pour pouvoir être inséré facilement dans le sol. Les électrodes sont réalisées par dépôt électrochimique de cuivre sur ce cylindre p
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28

Dias, Pedro Carvalhaes 1983. "Um novo sensor de umidade de solo de pulso de calor de alta sensibilidade, baseado em um único transistor bipolar de junção npn = A novel high sensitivity single probe heat pulse soil moisture sensor based on a single npn bipolar junction transistor = A novel high sensitivity single probe heat pulse soil moisture sensor based on a single npn bipolar junction transistor." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261867.

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Orientador: Elnatan Chagas Ferreira<br>Texto em inglês<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-20T11:54:01Z (GMT). No. of bitstreams: 1 Dias_PedroCarvalhaes_M.pdf: 7362254 bytes, checksum: dd839cf652cbbda17a2a5d9b6cecbdc3 (MD5) Previous issue date: 2012<br>Resumo: A constante preocupação em aumentar a produtividade das plantações de uma forma sustentável e otimizando o uso dos insumos agrícolas (água, fertilizantes, pesticidas e produtos para correção do PH) levou ao desenvolvimento
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29

Gao, Qi. "Estimation of water resources on continental surfaces by multi-sensor microwave remote sensing." Doctoral thesis, Universitat Ramon Llull, 2019. http://hdl.handle.net/10803/667771.

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L'estimació dels recursos hídrics de les superfícies continentals a escala regional i global és fonamental per a una bona gestió dels recursos hídrics. Aquesta estimació cobreix una àmplia gamma de temes i camps, incloent-hi la caracterització dels sòls i dels recursos hídrics a l’escala de la conca, la modelització hidrològica i la predicció i la cartografia d'inundacions. En aquest context, la caracterització dels estats de la superfície continental, per a obtenir millors paràmetres d’entrada als models hidrològics, és essencial per millorar la precisió en la simulació de cabals, sequeres i
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30

Fontes, Ivo Reis [UNESP]. "Sistema de supervisão e controle de irrigação utilizando técnicas de inteligência artificial." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/101749.

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Made available in DSpace on 2014-06-11T19:31:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-12-18Bitstream added on 2014-06-13T19:41:53Z : No. of bitstreams: 1 fontes_ir_dr_botfca.pdf: 6105136 bytes, checksum: 23e89a651c99005b7465ec2d3aae3e9b (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O presente trabalho teve como objetivo a configuração de um sistema de supervisão e controle de irrigação utilizando técnicas de inteligência artificial. De acordo com metodologia adotada, o seu desenvolvimento foi realizado em três fases distintas. Inicialmente foram c
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31

Meinel, Till. "Bodenfeuchtemessung in Echtzeit." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-230050.

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- Einleitung: Projektvorstellung 3D – Saat - Material und Methode zur Einflussermittlung von Bodenparametern auf die Ergebnisse der Feuchtemessung - Präsentation und Diskussion der Ergebnisse - Zusammenfassung und Ausblick
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32

Hammouch, Hajar. "Application of advanced artificial intelligence models to manage irrigation using sensor data and satellite images." Electronic Thesis or Diss., Institut polytechnique de Paris, 2025. http://www.theses.fr/2025IPPAS005.

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Dans cette thèse, nous abordons les défis urgents de la gestion de l'eau par l'analyse d'images agricoles et l'étude de modèles d'intelligence artificielle (IA) pour optimiser l'agriculture de précision. Étant donné la menace croissante du changement climatique et la crise mondiale de l'eau, nous avons effectué une étude systématique des technologies d'irrigation intelligente, avec une emphase particulière sur les capteurs IoT, la télédétection (RS: Remote Sensing) et les méthodes d'IA. Cet examen exhaustif met non seulement en évidence les approches existantes, mais ouvre également la voie à
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Cruz, João Alexandre Batista da. "DESENVOLVIMENTO DE UM SENSOR DE UMIDADE DO SOLO PARA DETERMINAÇÃO DA FRENTE DE MOLHAMENTO." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2013. http://tede2.uepg.br/jspui/handle/prefix/164.

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Made available in DSpace on 2017-07-21T14:19:38Z (GMT). No. of bitstreams: 1 Joao Alexandre Cruz.pdf: 7505097 bytes, checksum: 227ae1f1c6b1c1dd753fb648adc79f93 (MD5) Previous issue date: 2013-09-05<br>The knowledge and control of soil properties in gricultural cultivation, obtained from sensors at automated system, extend the possibilities of increasing the results of a culture. This work aims to develop an electrical measure sensor at low cost to determinethe soil moisture, test and evaluate the correlation between the readings and gravimetric soil moisture, considered standard to calibr
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34

Fontes, Ivo Reis. "Sistema de supervisão e controle de irrigação utilizando técnicas de inteligência artificial /." Botucatu : [s.n.], 2003. http://hdl.handle.net/11449/101749.

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Orientador: José Angelo Cagnon<br>Banca: Nelson Miguel Teixeira<br>Banca: Edwin Avolio<br>Banca: Diógenes Pereira Gonzaga<br>Banca: André Torre Neto<br>Resumo: O presente trabalho teve como objetivo a configuração de um sistema de supervisão e controle de irrigação utilizando técnicas de inteligência artificial. De acordo com metodologia adotada, o seu desenvolvimento foi realizado em três fases distintas. Inicialmente foram construídos os seguintes módulos de hardware: Unidade de Sensores, Unidade Concentradora de Dados e Sensor de Umidade do Solo do tipo Capacitivo. Em seguida foi criada uma
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Rášo, Peter. "Bezdrátová síť snímačů pro měření sacího potenciálu půdy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218896.

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Cílem tohoto projektu je vytvoření bezdrátové senzorické sítě na měření sacího potenciálu půdy. Práce obsahuje výběr vhodné měřící metody obsahu vody v půdě, jejíž součástí je i tvorba kalibrač˘ní křivky. Dále se zabývá realizací hardwaru a firmwaru pro dva typy modulů. Stanice end station, obsahující snímač˘e, a základní stanice base station, která přijímá a přeposílá data. Celá aplikace je doplněna o uživatelský program, který umožňuje zálohování dat, zobrazování průběhů dat včetně dat předchozích, změnu nastavení systému spolu s možností žádosti o potřebné informace.
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36

Abelen, Sarah [Verfasser], Florian [Akademischer Betreuer] [Gutachter] Seitz, Wolfgang [Gutachter] Wagner, and Uwe [Gutachter] Stilla. "Signals of Weather Extremes in Soil Moisture and Terrestrial Water Storage from Multi-Sensor Earth Observations and Hydrological Modeling / Sarah Abelen. Betreuer: Florian Seitz. Gutachter: Wolfgang Wagner ; Uwe Stilla ; Florian Seitz." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1107543363/34.

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37

Feliciano, Rafaelle de Aguiar Correia. "Controle fuzzy espacialmente diferenciado para um sistema de irriga??o." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15467.

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Made available in DSpace on 2014-12-17T14:56:12Z (GMT). No. of bitstreams: 1 RafaelleACF_DISSERT.pdf: 3862937 bytes, checksum: 6acc4a4b451409b32a954e89796aec73 (MD5) Previous issue date: 2012-12-20<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Traditional irrigation projects do not locally determine the water availability in the soil. Then, irregular irrigation cycles may occur: some with insufficient amount that leads to water deficit, other with excessive watering that causes lack of oxygen in plants. Due to the nonlinear nature of this problem and the multivariable con
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Roque, Wellington. "Contribuição ao estudo do sensor de umidade do solo que utiliza a técnica de dissipação de calor baseado em um transistor de junção bipolar (NPN)." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260879.

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Orientador: José Antonio Siqueira Dias<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-22T06:29:21Z (GMT). No. of bitstreams: 1 Roque_Wellington_D.pdf: 36135434 bytes, checksum: 2e9ca0be59b1286da36d45ebc67dfd0d (MD5) Previous issue date: 2012<br>Resumo: A aplicação de sensores de umidade do solo vem aumentando devido à necessidade do uso eficiente da água para irrigação. Uma das técnicas amplamente utilizadas para o desenvolvimento desses sensores é a de dissipação de calor. Nesta técnica, um ele
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Aubert, Maëlle. "Caractérisation de l’état de surface des sols nus agricoles par imagerie radar TerraSAR-X." Electronic Thesis or Diss., Paris, AgroParisTech, 2012. http://www.theses.fr/2012AGPT0047.

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Dans un contexte de développement durable, la gestion des sols et des ressources en eau est un enjeu primordial non seulement d’un point de vue environnemental mais aussi socio-économique. L’humidité, la rugosité, la composition et la structure du sol sont des variables clés pour la compréhension et la modélisation des catastrophes naturelles telles que l’érosion, la sécheresse ou les inondations. Pour des sols nus agricoles (très propices au ruissellement), de nombreuses études ont déjà montré le potentiel des données RADAR acquises en bande C pour la cartographie de l'humidité et la rugosité
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Tsai, De-Jian, and 蔡得建. "Capacitive Soil Moisture Sensors with Electrokinetic Ion Trap Mechanism." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/62329904648707914338.

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碩士<br>國立屏東科技大學<br>材料工程研究所<br>101<br>This study develops a real-time soil moisture sensor based on stainless planar electrodes to measure the capacitance changes of soil in the presence of water and an electrokinetic ion trap mechanism to move and attract ions in water for reducing ion effects on the sensor. A specific design of the stainless planar electrodes and the sensing material utilizing soils are optimized. As rain falls on ground soil, its water content increases together with that of the soil in the sensor at the same ground level. This variation of water content causes a change in th
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Chen, Zhi-Mou, and 陳智謀. "Calibration of Watermark Sensors and Measurement Analysis of Soil Moisture Tension." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/64132876808709980791.

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碩士<br>國立屏東科技大學<br>土木工程系碩士班<br>93<br>This study can divide into two parts: one is to generate the calibration process of Watermark sensor; the other is to use the sensor to measure soil moisture tension in field test. According to the calibration results, two regression equations were obtained between the soil moisture tension and the voltage of Watermark sensor. These equations were represented by three degree polynomial equation and Logis equation, respectively. In additional, these equations were accurately used to express the soil moisture tension in field test. The experiment results showe
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Fang-ChienChai and 柴方健. "A Remaining Useful Lifetime Estimation Method for Sensors – A Case Study on Soil Moisture Sensors." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/e96r4z.

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Lanka, Karthikeyan. "Retrieval of Land Surface Variables using Microwave Remote Sensing." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4252.

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Microwave remote sensing of the land surface processes has advantages over optical remote sensing such as least attenuation due to the atmosphere, and high temporal resolution among others. Soil moisture is an important land surface variable, which is present at land atmosphere interphase and influences the hydrologic, atmospheric, climate, agricultural, and carbon cycles. Given the challenges involved in measuring the soil moisture at local scale (heterogeneous nature of the soil, financial constraints etc.), microwave remote sensing has assisted the researchers in obtaining the soil moistur
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Bingham, Alison. "Substrate Moisture Content Effects on Growth and Shelf Life of Angelonia angustifolia." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11140.

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Wilting during shelf life is a major cause of postharvest shrink for bedding plants shipped long distances from production greenhouses to retail outlets. The objective of this research was to determine if irrigation at lower, constant substrate moisture content (SMC) during greenhouse production would be a feasible way to acclimate plants for reduced shrinkage during shelf life, while potentially conserving irrigation water. Rooted plugs of Angelonia angustifolia 'Angelface Blue' were grown in greenhouse production until a marketable stage in substrates irrigated at SMC levels of 10, 20,
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Sarkar, Biplab. "Synthesis of Conceptual Designs for Sensors." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/2792.

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A computer-aided technique is developed in this thesis to systematically generate concepts for sensors of a wide variety. A database of building blocks, based on physical laws and effects that capture the transduction rules underlying the working principles of sensors, has been developed to synthesize concepts. The proposed method uses the database to first create a concept-space graph and then selects concepts that correspond to paths in the graph. This is in contrast to and more efficient than existing methods, such as, compositional synthesis and graph-grammar synthesis, where solution
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Sarkar, Biplab. "Synthesis of Conceptual Designs for Sensors." Thesis, 2015. http://etd.iisc.ernet.in/handle/2005/2792.

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National Programme on Micro and Smart Materials and Systems (NPMASS)<br>A computer-aided technique is developed in this thesis to systematically generate concepts for sensors of a wide variety. A database of building blocks, based on physical laws and effects that capture the transduction rules underlying the working principles of sensors, has been developed to synthesize concepts. The proposed method uses the database to first create a concept-space graph and then selects concepts that correspond to paths in the graph. This is in contrast to and more efficient than existing methods, such a
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張敏德. "Study on Hygroscopic Soil Moisture Content Sensor." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/80950064662246496248.

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碩士<br>國立中興大學<br>農業機械工程學系<br>88<br>The objective of this study is to invent a soil moisture content sensor. Through the tests of the voltage outputs of sensor with various soil moisture contents, this study discovered the relationship between sensor voltage output and soil moisture content, and the stability and responsive sensibility of the sensor. The developed sensor can be used to manage the soil moisture content effectively. The inventive absorptive hygroscopic sensor was made of high-polymeric plastic. The sensor contented tremendous continuous micro pores to absorb moisture. T
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Kuo, Yu-Chun, and 郭昱均. "Self-Sustaining Wireless Moisture Sensor using Solely Soil Energy." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/d3gm8m.

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碩士<br>國立中正大學<br>電機工程研究所<br>103<br>In recent years, with the rapid advances in the integrated circuit, electronics devices become powerful, robust, and miniaturized. In the method of the integrated circuit, it is gradually diversified on the applications with electronic circuits and sensors. In addition to the integration circuit technology, the energy source always restricts the development of wireless sensor applications. This thesis is dedicated to using soil energy as the energy source of wireless sensor. The rapid development of wireless sensors will be able to use in environment monitor
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Liu, Min-Yen, and 劉名晏. "Capacitive Soil Moisture Sensor Readout Circuits Design and System Implementation." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/wf7d4b.

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碩士<br>中原大學<br>電子工程研究所<br>104<br>In this paper, the use of capacitive sensing soil moisture probes, conduct its research characteristics, and design its readout circuit. The focus of this research will be different in soil moisture sensing module and its corresponding capacitor to read out the complete frequency monitor humidity. On the other hand, the probe signal readout circuitry may be LCD Panel CC2530 analog board showing soil moisture values. At present, this capacitive soil moisture sensing readout circuit has a complete prototype of the circuit may be different soil moisture and moistur
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Salah, Mohamed Ben. "Agricultural LoRA sensor network applied to soil moisture monitoring for fertigation-based production." Master's thesis, 2021. http://hdl.handle.net/10198/24778.

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Mestrado de dupla diplomação com a Université Libre de Tunis<br>The global water crisis is one of the serious threats that human being is facing and especially farmers due to a variety of environment issues. This growing trend of water scarcity led to the existence of the efficiency of irrigation systems for agricultural proposes using electronic sensors and performance systems to precise the amount of water for the growth of plants. However, currently, some automation attempts led to a sub-optimal solution as they do not take into account the vegetative development state of the plants an
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