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A microwave method for on-line determination of bulk density and moisture content of particulate materials

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3 Author(s)
Trabelsi, S. ; US Dept. of Agric., Athens, GA, USA ; Kraszewski, A.W. ; Nelson, S.O.

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

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Instrumentation and Measurement, IEEE Transactions on  (Volume:47 ,  Issue: 1 )