Using acoustical measurements to monitorcorn moisture

Document Type

Article

Journal/Book Title/Conference

J. Acoust. Soc. Amer.,

Volume

91

Issue

4

Publication Date

4-1-1992

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 condensermicrophone 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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