25.4 mV降低到1 mV。Zero-drift of the grain flow sensor leads to a significant error when the combine harvester tilted. The purpose of this paper is to study the effects of combine harvester tilt on the zero-drift of the impact-based grain flow sensor,and propose an innovated grain flow sensor that can stabilize zero-drift when combine harvester titled. With the single plate impact-based grain flow sensor fixed in a combine harvester, the zero-drift voltage of the grain flow sensor is recorded while the combine harvester tilted between -15° and 15°. The test result shows that there is a linear relationship between the zero-drift and the obliquity, and the zero-drift voltage is 25.4 mV when the combine harvester tilted at 15°. A dual-plate differential impact-based grain flow sensor is developed to compensate the zero drift. The tilt experimental results show that the zero-drift of the two plates are consistent each other, and thus the overall zero-drift voltage of the sensor is reduced from 25.4 mV to 1 mV.
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胡均万,罗锡文,陈树人,李耀明,杨洪博.机身倾斜导致谷物流量传感器零点漂移的补偿[J].农业机械学报,2009,40(Z1):57-60.-drift Compensation of Impact-based Grain Flow Sensor for Tilted Combine Harvester[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(Z1):57-60.