This paper describes a system for soil moisture measurement based on a waveguide spectrometer that acquires “gain” and “phase” spectra, with a frequency range of 1.5 – 2.7 GHz. The fundamental components of the system are a waveguide, containing TX and RX antennas, and an electronic circuit, generating the electromagnetic waves and elaborating data, driven by a microcontroller (MCU). This system was previously tested on samples created in laboratory, but a study of system behavior in environmental conditions was missing. Therefore, acquisition of measurements and samples were conducted on real soil, and these data were used to obtain a good calibration model between spectra and soil moisture values. Calibration coefficients were used to implement the moisture calculation directly in the MCU, obtaining a non-invasive and stand-alone system. The architecture shows promising results and prove the capability of electromagnetic waves to perform accurate and fast silty clay loam moisture assessments on a real environment.

Franceschelli, L., Brunelli, D., Crescentini, M., Ragni, L., Berardinelli, A., Tartagni, M. (2020). Soil Moisture Assessment with a Waveguide Spectrometer [10.1109/ISCAS45731.2020.9181300].

Soil Moisture Assessment with a Waveguide Spectrometer

Franceschelli, Leonardo
Primo
;
Crescentini, Marco;Ragni, Luigi;Tartagni, Marco
2020

Abstract

This paper describes a system for soil moisture measurement based on a waveguide spectrometer that acquires “gain” and “phase” spectra, with a frequency range of 1.5 – 2.7 GHz. The fundamental components of the system are a waveguide, containing TX and RX antennas, and an electronic circuit, generating the electromagnetic waves and elaborating data, driven by a microcontroller (MCU). This system was previously tested on samples created in laboratory, but a study of system behavior in environmental conditions was missing. Therefore, acquisition of measurements and samples were conducted on real soil, and these data were used to obtain a good calibration model between spectra and soil moisture values. Calibration coefficients were used to implement the moisture calculation directly in the MCU, obtaining a non-invasive and stand-alone system. The architecture shows promising results and prove the capability of electromagnetic waves to perform accurate and fast silty clay loam moisture assessments on a real environment.
2020
2020 IEEE International Symposium on Circuits and Systems (ISCAS)
1
5
Franceschelli, L., Brunelli, D., Crescentini, M., Ragni, L., Berardinelli, A., Tartagni, M. (2020). Soil Moisture Assessment with a Waveguide Spectrometer [10.1109/ISCAS45731.2020.9181300].
Franceschelli, Leonardo; Brunelli, Davide; Crescentini, Marco; Ragni, Luigi; Berardinelli, Annachiara; Tartagni, Marco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/798362
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