A Robust Soil Water Potential Sensor with High Sensitivity and Broad Measuring Range

Menne, David; Hübner, Christof; Trebbels, Dennis; Willenbacher, Norbert

doi:10.1109/isema49699.2021.9508320

Cited by 1 publication

(9 citation statements)

References 12 publications

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“…With this goal in mind, we developed a novel sensor and presented it for the first time in ref. [34].…”

Section: Discussionmentioning

confidence: 99%

“…Further details on the fabrication process based on capillary suspensions can be found in ref. [34] and on the general manufacturing of capillary suspensions in refs. [36,38].…”

Section: Raw Materialsmentioning

confidence: 99%

“…This means that a higher count value corresponds to a higher frequency and thus a lower moisture in the soil. The stability of the ring oscillator is about one count, and, together with a dynamic range of over 1000 counts, its resolution is 10 bit [34]. TDT is perfectly suited for saline environments due to the high frequency, and it has the same advantage as a time-domain reflectometer (TDR).…”

Section: Ceramic and Sensor Propertiesmentioning

confidence: 99%

“…Figure 2b,f and ref. [34]). Obviously, the difference in the pore size distribution of the two ceramics is not significant for drying kinetics under atmospheric pressure.…”

Section: Air Drying Experiments: Laboratorymentioning

confidence: 99%

“…By measuring the dielectric permittivity of the porous ceramic disk, the water potential is determined. In this way, the water potential of the soil can be calculated using correlation functions for standard soils [34].…”

Section: Introductionmentioning

confidence: 99%

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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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“…With this goal in mind, we developed a novel sensor and presented it for the first time in ref. [34].…”

Section: Discussionmentioning

confidence: 99%

“…Further details on the fabrication process based on capillary suspensions can be found in ref. [34] and on the general manufacturing of capillary suspensions in refs. [36,38].…”

Section: Raw Materialsmentioning

confidence: 99%

Section: Ceramic and Sensor Propertiesmentioning

confidence: 99%

“…Figure 2b,f and ref. [34]). Obviously, the difference in the pore size distribution of the two ceramics is not significant for drying kinetics under atmospheric pressure.…”

Section: Air Drying Experiments: Laboratorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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