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Dynamic Compensation for Impact-Based Grain Flow Sensor

Abstract : The impact-based grain flow sensor is widely used in the combine harvester yield monitor systems to measure the crop yield .but its accuracy wrecked by false signal of excessive natural vibration. A step response experiment was carried to identify the math function of the sensor. Experiment found that the math function of the sensor was a second-order vibration system, its Damping Ratio was 0.037, and its natural frequency was 125Hz, the overshoot reached 20%.To reduce the effect of the overshoot and natural vibration signal on the measurement accuracy, a dynamic compensation algorithm was designed with the series correction method. Step response experiment showed that the overshoot of the compensated sensor was reduced from 20% to 2%.
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Junwan Hu, Changlai Gong, Zhigang Zhang. Dynamic Compensation for Impact-Based Grain Flow Sensor. 5th Computer and Computing Technologies in Agriculture (CCTA), Oct 2011, Beijing, China. pp.210-216, ⟨10.1007/978-3-642-27275-2_23⟩. ⟨hal-01361140⟩

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