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 onsamples 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 moistureassessments 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
;Brunelli, Davide;Crescentini, Marco;Ragni, Luigi;Berardinelli, Annachiara;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 onsamples 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 moistureassessments on a real environment.| File | Dimensione | Formato | |
|---|---|---|---|
| Soil moisture assessment with a waveguide spectrometer.pdf accesso aperto Tipo:Postprint Licenza:Licenza per accesso libero gratuito Dimensione4.37 MB FormatoAdobe PDF | 4.37 MB | Adobe PDF | Visualizza/Apri |
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