Title :
Measurement of the moisture content with a cylindrical resonating cavity in TM010 mode
Author :
Bourdel, Emmanuelle ; Pasquet, Daniel ; Denorme, Paul ; Roussel, Alain
Author_Institution :
ENSEA, Cergy-Pontoise, France
fDate :
10/1/2000 12:00:00 AM
Abstract :
A new resonating mode has been used in a cylindrical cavity to measure the moisture content and the specific mass of cigarettes. A simple theoretic calculation gives the relation between the sample complex permittivity and the characteristics of the cavity. A model is proposed to extract the moisture content and the specific mass from the complex permittivity. An experimental setup has been demonstrated. It uses a servo-controlled oscillator. This setup is ready to be tried on a production machine
Keywords :
cavity resonators; circular waveguides; electric sensing devices; mass measurement; microwave measurement; moisture measurement; permittivity measurement; PTFE; cigarettes; complex permittivity; cylindrical cavity; cylindrical resonating cavity; microwave measurement; moisture content measurement; resonating mode; sensor; servo-controlled oscillator; Dielectrics; Equations; Helium; Microwave oscillators; Moisture measurement; Permittivity measurement; Production; Resonance; Resonant frequency; Waveguide components;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
