Development of a heat pulse sensor for measuring matric suction on soilless substrates

Mota, Wilson Nogueira; Evangelista, Adão Wagner Pêgo; Maia, Lauro J. Q.; Correchel, Vládia; Alves, José Maria Arcanjo; Varrone, Luiz Felipe R.; Gitirana, Gilson de F. N.

doi:10.1016/j.compag.2021.106119

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…The ψ value is measured using a tensiometer, which is a conventional technique for measuring water pressure equilibrated with soil pore water via a porous cup, or porous medium-based sensors [ 21 , 22 ]. The porous medium-based sensors, which measure the electrical or thermal properties of porous media inserted into the soil and equilibrated soil pore water, are becoming the most common tools for obtaining ψ [ 20 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Time Domain Transmissiometry-Based Sensor for Simultaneously Measuring Soil Water Content, Electrical Conductivity, Temperature, and Matric Potential

Kojima

Matsuoka

Ariki

et al. 2023

Sensors

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Owing to the increasing popularity of smart agriculture in recent years, it is necessary to develop a single sensor that can measure several soil properties, particularly the soil water content and matric potential. Therefore, in this study, we developed a sensor that can simultaneously measure soil water content (θ), electrical conductivity (σb), temperature, and matric potential (ψ). The proposed sensor can determine θ and σb using time domain transmissiometry and can determine ψ based on the capacitance of the accompanying ceramic plate. A series of laboratory and field tests were conducted to evaluate the performance of the sensor. The sensor output values were correlated with the soil properties, and the temperature dependence of the sensor outputs was evaluated. Additionally, field tests were conducted to measure transient soil conditions over a long period. The results show that the developed sensor can measure each soil property with acceptable accuracy. Moreover, the root-mean-square errors of the sensor and reference values were 1.7 for the dielectric constant (which is equivalent to θ), 62 mS m−1 for σb, and 0.05–0.88 for log ψ. The temperature dependence was not a problem, except when ψ was below −100 kPa. The sensor can be used for long-term measurements in agricultural fields and exhibited sufficient lifetime and performance. We believe that the developed sensor can contribute to smart agriculture and research on heat and mass transfer in soil.

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Section: Introductionmentioning

confidence: 99%

Time Domain Transmissiometry-Based Sensor for Simultaneously Measuring Soil Water Content, Electrical Conductivity, Temperature, and Matric Potential

Kojima

Matsuoka

Ariki

et al. 2023

Sensors

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“…In addition to the mentioned commercially available sensors, Whalley [13][14][15] developed a porous matrix sensor that shows a measuring range from 500 hPa to 3000 hPa. Recently, a few new sensors have been introduced in the literature, which could market-launch in the near future [16][17][18][19][20][21][22][23][24][25]. EQ3 Equitensiometer Delta-T Devices Ltd. (Burwell, Cambridge, UK) 0 to 10,000 hPa 800 € [28] Tensiomark (0-7) EcoTech Umwelt-Meßsysteme GmbH (Bonn, Germany) 1 to 10,000,000 hPa 650 €…”

Section: Introductionmentioning

confidence: 99%

Robust Soil Water Potential Sensor to Optimize Irrigation in Agriculture

Menne

Hübner²,

Trebbels³

et al. 2022

Sensors

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Extreme weather phenomena are on the rise due to ongoing climate change. Therefore, the need for irrigation in agriculture will increase, although it is already the largest consumer of water, a valuable resource. Soil moisture sensors can help to use water efficiently and economically. For this reason, we have recently presented a novel soil moisture sensor with a high sensitivity and broad measuring range. This device does not measure the moisture in the soil but the water available to plants, i.e., the soil water potential (SWP). The sensor consists of two highly porous (>69%) ceramic discs with a broad pore size distribution (0.5 to 200 μm) and a new circuit board system using a transmission line within a time-domain transmission (TDT) circuit. This detects the change in the dielectric response of the ceramic discs with changing water uptake. To prove the concept, a large number of field tests were carried out and comparisons were made with commercial soil water potential sensors. The experiments confirm that the sensor signal is correlated to the soil water potential irrespective of soil composition and is thus suitable for the optimization of irrigation systems.

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Development of the thermophysical parameter tester for measuring the soil matrix suction and optimization of the calibration function

Kang

Zhang

et al. 2023

Computers and Electronics in Agriculture

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Development of a heat pulse sensor for measuring matric suction on soilless substrates

Cited by 3 publications

References 18 publications

Time Domain Transmissiometry-Based Sensor for Simultaneously Measuring Soil Water Content, Electrical Conductivity, Temperature, and Matric Potential

Time Domain Transmissiometry-Based Sensor for Simultaneously Measuring Soil Water Content, Electrical Conductivity, Temperature, and Matric Potential

Robust Soil Water Potential Sensor to Optimize Irrigation in Agriculture

Development of the thermophysical parameter tester for measuring the soil matrix suction and optimization of the calibration function

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