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.

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, Leonardo; Brunelli, Davide; Crescentini, Marco; Ragni, Luigi; Berardinelli, Annachiara; Tartagni, Marco
File in questo prodotto:
File Dimensione Formato  
Soil moisture assessment with a waveguide spectrometer.pdf

accesso aperto

Tipo: Postprint
Licenza: Licenza per accesso libero gratuito
Dimensione 4.37 MB
Formato Adobe PDF
4.37 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/798362
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact