Title :
A microwave method for on-line determination of bulk density and moisture content of particulate materials
Author :
Trabelsi, Samir ; Kraszewski, Andrzej W. ; Nelson, Stuart O.
Author_Institution :
US Dept. of Agric., Athens, GA, USA
fDate :
2/1/1998 12:00:00 AM
Abstract :
A new method for simultaneous and independent on-line determination of bulk density and moisture content in particulate materials by measurements of the relative complex permittivity is proposed. The bulk density is determined, based on a representation in the complex plane of relative complex permittivity normalized to bulk density. For moisture content determination, a new density-independent function, exclusively dependent on the dielectric properties, is used. Results obtained from measurements on wheat over broad ranges of microwave frequencies, temperatures, densities, and moisture contents are presented
Keywords :
agriculture; computerised instrumentation; density measurement; microwave measurement; moisture measurement; permittivity measurement; bulk density; error analysis; microwave frequencies; microwave method; moisture content measurement; on-line determination; particulate materials; relative complex permittivity; wheat; Density measurement; Dielectric materials; Dielectric measurements; Frequency measurement; Microwave frequencies; Microwave measurements; Microwave theory and techniques; Moisture measurement; Particle measurements; Permittivity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
