Improving Design of a PVDF Grain Loss Sensor for Combine Harvester

  • Liming Zhou
  • Yanwei YuanEmail author
  • Junning Zhang
  • Kang Niu
Conference paper
Part of the IFIP Advances in Information and Communication Technology book series (IFIPAICT, volume 546)


Online monitoring of grain loss is important to improve the efficiency of combine harvester. The traditional grain loss sensor needs to be frequently calibrated for different materials. In order to solve this problem, the grain loss sensor was developed based on PVDF (Polyvinyliden Fluoride) films. The band-pass filter based on LTC1068-200 was designed by frequency spectrum analysis of the wheat and rice grain impact response. And the dynamic voltage comparator with adaptive regulation of the threshold voltage according to the intensity of sensor signal was introduced here. Wheat and rice grain samples with different moisture content were prepared for the experiments and the results indicated the sensor had high measurement accuracy to the different samples.


Combine harvester Grain loss sensor Band pass filter Adaptive threshold voltage 



This research was funded by the National Key Research and Development Program of China (2016YFD0700305) and Science & Technology Nova Program of Beijing (Z1511000003150116) and Technology developing and achievement transformation project of XPCC(2015AC009).


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Copyright information

© IFIP International Federation for Information Processing 2019

Authors and Affiliations

  • Liming Zhou
    • 1
  • Yanwei Yuan
    • 1
    Email author
  • Junning Zhang
    • 1
  • Kang Niu
    • 1
  1. 1.Chinese Academy of Agricultural Mechanization SciencesBeijingChina

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