DocumentCode :
1260087
Title :
Measurement of grain moisture content using microwave attenuation at 10.5 GHz and moisture density
Author :
Kim, Ki-Bok ; Kim, Jong-Heon ; Lee, Seung Seok ; Noh, Sang Ha
Author_Institution :
Center for Safety Meas., Korea Res. Inst. of Stand. & Sci., Daejon, South Korea
Volume :
51
Issue :
1
fYear :
2002
fDate :
2/1/2002 12:00:00 AM
Firstpage :
72
Lastpage :
77
Abstract :
The dielectric properties of Korean short-grain rough rice, brown rice and barley with moisture content ranges of 11% to 27%, 11% to 18%, and 11 to 21%, wet basis, respectively, were characterized to develop a prototype grain moisture meter using microwave attenuation at 10.5 GHz and moisture density. A third-order polynomial regression model was proposed to describe the relationship between dielectric properties and moisture density. The prototype grain moisture meter consisted of a dielectric resonator type oscillator of 10.5 GHz, horn antenna, rectangular sample holder, load cell, temperature sensor, detector, and digital voltmeter. The calibration equation for measurement of grain moisture content was developed and estimated with Korean short-grain rough rice (12% to 26%). The coefficient of determination, standard error of prediction (SEP), and bias were 0.986, 0.52% moisture content and 0.07% moisture content, respectively
Keywords :
calibration; density; dielectric resonator oscillators; digital voltmeters; electromagnetic wave absorption; horn antennas; microwave detectors; microwave measurement; moisture measurement; polynomials; statistical analysis; temperature sensors; 10.5 GHz; Korean short-grain rough rice; barley; bias; brown rice; calibration equation; coefficient of determination; detector; dielectric properties; dielectric resonator type oscillator; digital voltmeter; grain moisture content; grain moisture content measurement; horn antenna; load cell; microwave attenuation; moisture content ranges; moisture density; prototype grain moisture meter; rectangular sample holder; standard error of prediction; temperature sensor; third-order polynomial regression model; Attenuation measurement; Dielectric measurements; Dielectric resonator antennas; Horn antennas; Loaded antennas; Microwave measurements; Microwave oscillators; Moisture measurement; Polynomials; Prototypes;
fLanguage :
English
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9456
Type :
jour
DOI :
10.1109/19.989904
Filename :
989904
Link To Document :
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