Calibrating free-space measurement systems for microwave moisture sensing in granular materials

Author

Trabelsi, Samir ; Nelson, Stuart O. ; Kraszewski, Andrzej W.

Author_Institution

Agric. Res. Service, U. S. Dept. of Agric., Athens, GA, USA

Volume

2

fYear

2002

fDate

6/24/1905 12:00:00 AM

Firstpage

1381

Abstract

The universal character of a permittivity-based calibration function for moisture determination in granular materials such as cereal grain and seed is tested through measurement at microwave frequencies on materials of different structure and composition using two free-space measurement arrangements. Results obtained from measurements on wheat, corn and soybeans provide moisture calibration equations with temperature compensation that are very similar for both systems leading to a single moisture calibration equation and the potential of transferability of the calibration routine across instruments of different designs.

Keywords

agriculture; calibration; compensation; granular materials; microwave measurement; moisture measurement; permittivity measurement; statistical analysis; calibration transferability; cereal grain; corn; free-space measurement systems; frequency-dependent coefficient; granular materials; horn antennas; microwave moisture sensing; moisture calibration equations; moisture content; near field; permittivity-based calibration function; regression analysis; relative complex permittivity; seed; soybeans; temperature compensation; universal algorithm; wave-material interaction; wheat; Calibration; Composite materials; Differential equations; Frequency measurement; Materials testing; Microwave frequencies; Microwave measurements; Moisture measurement; Permittivity measurement; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2002. IMTC/2002. Proceedings of the 19th IEEE

ISSN

1091-5281

Print_ISBN

0-7803-7218-2

Type

conf

DOI

10.1109/IMTC.2002.1007159

Filename

1007159