Title :
Using a microwave acoustic technique to measure the moisture content of water bearing samples
Author :
Yamamoto, Yukio ; Ushimi, Yuichiro ; Katsuragi, Motohira
Author_Institution :
Dept. of Electr. Eng. & Electron., Osaka Sangyo Univ., Osaka, Japan
Abstract :
A novel microwave acoustic technique to measure the water content in a sample is proposed. The sample is mounted in a microwave acoustic cell made of a standard waveguide, a mica window and a microphone. A modulated X-band signal fed to the sample produces an acoustic wave at the modulation frequency. The acoustic output voltages decrease linearly with increased water content in the range from 65% to 95%
Keywords :
acoustic microwave devices; microwave measurement; moisture measurement; ultrasonic applications; acoustic output voltage; mica window; microphone; microwave acoustic cell; microwave acoustic technique; modulated X-band signal; moisture content measurement; standard waveguide; water bearing samples; Acoustic materials; Acoustic measurements; Acoustic signal detection; Acoustic waves; Electromagnetic wave absorption; Frequency modulation; Microphones; Microwave measurements; Microwave theory and techniques; Moisture measurement;
Conference_Titel :
Microwave Conference, 2000 Asia-Pacific
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6435-X
DOI :
10.1109/APMC.2000.926130
