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Monitoring a Hydraulically-Driven Feed Roll System with Sensors on aPrototype Pull-Type Forage Harvester

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Applied Engineering in Agriculture. 33(1): 23-30. (doi: 10.13031/aea.11645) @2017
Authors:   Ahmad Mohsenimanesh, Philippe Nieuwenhof, Dan-Sorin Necsulescu, Claude Laguë
Keywords:   Hydraulic power transmission system, Mass-flow technology, Multiple sensor system, Precision agriculture.

Abstract. An experimental hydraulic drive was designed for a pull-type F41 Dion forage harvester to control and measure the rotational speed and applied load of feedrolls. Three types of sensors were placed on the experimental harvester: (1) four hydraulic pressure sensors to measure pressure in the input and output lines of the feedroll and header motors; (2) three integrated tachometers to measure motor speed, and (3) a potentiometer-based sensor to measure crop mass flow. Data was collected using a National Instruments USB 6216TM device and LabViewTM code. Pressure drop of the motor depended on mass flowrate of the crop material being conveyed. Power consumption increased with increasing rate of forage throughput. Increased forward speed decreased the specific energy requirements of the header and feedroll motors. The feedroll opening measurements using the potentiometer sensor were correlated with the experimental mass flowrate measured by weighing the forage wagon. Correlation coefficients were R2 = 0.97 and R2 = 0.59 at length of cut (LOC) of 15 and 9.5 mm, respectively. An analysis of variance indicated that both feedroll opening and throughput were affected by forward speed (p <0.01). These experimental results can allow for the optimization of the size of the drive components and facilitate the development of a throughput monitoring system.

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