Title :
A microwave system for moisture monitoring in wet powders for industrial applications
Author :
Bianchi, G. ; Dionigi, M. ; Fioretto, D. ; Sorrentino, R.
Author_Institution :
Elettronica S.p.A., Roma, Italy
Abstract :
A microwave resonant sensor for moisture monitoring in wet powders has been designed, fabricated and tested. The moisture content is evaluated by measuring the resonant frequency by means of inexpensive electronic circuitry capable of producing 800 frequency samples in less than 1 s. An accuracy better than 0.5% in wet sand has been demonstrated. The probe calibration procedure consists of just 3 resonant frequency measurements, allowing in situ calibrations for different types of powders.
Keywords :
UHF detectors; UHF measurement; calibration; moisture measurement; permittivity measurement; powders; 600 to 700 MHz; UHF; accuracy; calibration; design; electronic circuitry; industrial applications; microwave resonant sensor; microwave system; moisture monitoring; resonant frequency; wet powders; Calibration; Circuit testing; Frequency measurement; Microwave sensors; Moisture measurement; Monitoring; Powders; RLC circuits; Resonance; Resonant frequency;
Conference_Titel :
Microwave Symposium Digest, 1999 IEEE MTT-S International
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
0-7803-5135-5
DOI :
10.1109/MWSYM.1999.780276
