Abstract
The moisture content of grain, such as corn, is usually measured by weighing a sample before and after drying. This paper reports the feasibility of measuring corn moisture on-line by sampling and processing the acoustic signals of corn with different moisture content. Acoustic measurements were made in an anechoic chamber. A condenser microphone connected to an Omnidata Polycorder was used to sample the acoustic signal of corn dropping into a bin. An adaptive filter was used to discriminate corn moisture by comparing frequency information from signals of different corn samples. The results demonstrated the feasibility of using acoustical measurements for on-line monitoring of corn moisture.
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