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United States Department of Agriculture

Agricultural Research Service

Title: Using Cereal Grain Permittivity for Sensing Moisture Content

Authors
item Nelson, Stuart
item Kraszewski, Andrzej
item Trabelsi, Samir - OICD
item LAWRENCE, KURT

Submitted to: Institute of Electrical and Electronics Engineers
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: February 28, 2000
Publication Date: March 1, 2000
Citation: NELSON, S.O., KRASZEWSKI, A.W., TRABELSI, S., LAWRENCE, K.C. USING CEREAL GRAIN PERMITTIVITY FOR SENSING MOISTURE CONTENT. INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS. 2000.

Interpretive Summary: Moisture content of cereal grains is the most important characteristic determining proper time for harvest, safe storage potential, transportability, trading price, and quality and suitability for further processing. Moisture content is currently determined rapidly and nondestructively by electronic moisture meters that utilize the correlation nbetween electrical properties of grains, known as dielectric properties or permittivity, and the amount of moisture in the grain. These moisture meters work well for batch samples of grain taken from trucks, barges, elevator storage, shipping lots, etc., but attempts to use the same principles for sensing grain moisture content in flowing or moving grain to provide continuous moisture monitoring have not been as successful as desired in providing accurate moisture contents. Recent research has shown promise for eliminating the errors associated with moving grain measurements attributable to changes in the packing density of the granula materials as they flow. Several of the newly discovered techniques found useful for improving the accuracy of moisture sensing in moving grain are explained. These new methods should provide the basis for the development of reliable on-line monitoring instruments that can provide continuous moisture content information that will be helpful in maintaining high quality in grains and grain products and provide reliable moisture information needed for accurate yield determinations on combines employing precision agriculture technology.

Technical Abstract:

Last Modified: 9/29/2014
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