אסיף מאגר המחקר החקלאי

Implementation of dual-frequency RF impedance technique for on-line moisture sensing in single in-shell pecans

Year:

1996

Source of publication :

Authors :

Volume :

12

Co-Authors:

Schmilovitch, Z., Inst. of Agricultural Engineering, ARO, Volcani Center, Bet Dagan, Israel
Nelson, S.O., USDA-Agricultural Resarch Service, Richard B. Russell Agric. Res. Ctr., Athens, GA, United States, USDA-ARS, Russell Resarch Center, P. O. Box 5677, Athens, GA 30604, United States
Kandala, C.V.K., Research Services, University of Georgia, Athens
Lawrence, K.C., USDA-Agricultural Resarch Service, Athens, GA, United States

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Abstract:

An automated computer-controlled pecan feeder, singulation, and conveying system with a parallel-plate sensor for impedance measurements on single in-shell pecans in stationary contact was developed under a joint research project between engineers in Israel and in the United States. An inexpensive electronic RF impedance-measuring unit was developed and tested under on-line conditions. The electronic unit was calibrated to provide kernel moisture contents in individual pecans with standard errors of 1.1% m.c. (moisture content), as compared with moisture contents determined by a vacuum-oven reference method. The prototype automatic conveyor and moisture sensing system was capable of measuring moisture content of individual pecans at rates of up to three per second.

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