Signal processing method of impact-based grain flow sensor for predicted yield

Wei Xinhua; Zhang Jinmin; Dan Zhimin; Liu Chengliang

doi:10.3969/j.issn.1002-6819.2014.15.029

Volume 30 Issue 15

Jul. 2014

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Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2014 > 30(15): 222-228. > DOI: 10.3969/j.issn.1002-6819.2014.15.029

Wei Xinhua, Zhang Jinmin, Dan Zhimin, Liu Chengliang. Signal processing method of impact-based grain flow sensor for predicted yield[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2014, 30(15): 222-228. DOI: 10.3969/j.issn.1002-6819.2014.15.029

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Signal processing method of impact-based grain flow sensor for predicted yield

1.
Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China
2.
School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

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Received Date: December 04, 2013
Revised Date: June 27, 2014
Published Date: July 31, 2014

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Abstract

Abstract

Abstract: Background vibration noise of combine harvester has a significant influence on measuring accuracy of impact-based grain flow sensor. An indoor calibration test bench of impact-based grain flow sensor was developed to study extraction and rejection methods of the background vibration noise from output signal of impact-based grain flow sensor. The test bench was mainly composed of a grain supplying bin, a grain conveying auger, a drag-flight elevator and a grain receiving bin. The auger and the elevator were driven by a three-phase AC asynchronous motor. Grain flow rate was regulated by a spile plate which was mounted at the bottom of the grain supplying bin. Actual grain flow rate was measured with three weight sensors which were mounted between the grain supplying bin and the frame. Revolution speed of the elevator was measured with a revolution speed transducer. Different field working conditions of combine harvester were simulated by adjusting power frequency of the driving motor with a variable frequency generator. A dual-plate differential impact-based grain flow sensor was used in the study which consisted of a measuring plate, a reference plate and 2 strain bridges. The measuring plate accepted impact of the grain flow, and the reference plate sensed background vibration of combine harvester. The measuring plate and the reference plate had a same structure and were parallel mounted to make them have an approximately same mode of vibration. An industrial control system was used to control the variable frequency generator and to acquire output signals of the measuring plate, the reference plate, the weight sensors and the revolution speed transducer. Signal processing was also performed on the industrial control system. Output signals of the measuring plate and the reference plate were acquired synchronously with 3 kHz sampling frequency, and mean filtering was performed to the signals respectively to attenuate random noise. DFT (Discrete Fourier Transformation) was executed to the filtered signals respectively, and the transformed signal of the reference plate was subtracted from the transformed signal of the measuring plate, and IDFT (Inverse Discrete Fourier Transformation) was executed to the differential signal afterwards, thereby frequency-domain differential was fulfilled and yield signal was obtained. Compared with the time-domain differential results the yield signal obtained through the frequency-domain differential method had a less standard deviation. Experiment under different power frequencies of the driving motor showed frequency-domain differential method had a steady effective attenuation effect on background vibration noise rejection for output signal of the dual-plate differential impact-based grain flow sensor. Zero calibration and scale conversion calibration were carried out on the indoor calibration test bench, and yield test experiment under different power frequencies of the driving motor and different actual grain flow rate were performed on the indoor calibration test bench. Yield test experiment results showed the dual-plate differential impact-based grain flow sensor with frequency-domain differential signal processing method had a maximum measuring error of 3.1% with the actual grain flow rate in the range of 0.9 to 2.3 kg/s.
- sensors,
- signal processing,
- grain,
- yield testing,
- noise extraction,
- noise rejection,
- frequency-domain differential

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References (25)

References

[1]	汪懋华．"精细农业"发展与工程技术创新[J]. 农业工程学报，1999，15(1)：1－8.Wang Maohua. Precision agriculture development and engineering technology innovation[J]. Transactions of the Chinese Society for Agricultural Engineers (Transactions of the CSAE), 1999, 15(1): 1－8. (in Chinese with English abstract)
[2]	Reyns P, Missotten B, Ramon H, et al. A review of combine sensors for precision farming[J]. Precision Agriculture, 2002, 3(2): 169－182.
[3]	Selsuk Arslan, Feyzi Inanc, Joseph N Gray, et al. Grain flow measurements with X-ray techniques[J]. Computers and Electronics in Agriculture, 1999, 26(200): 65－80.
[4]	Mark Moore. An Investigation into the accuracy of yield maps and their subsequent use in crop management[D]. Cranfield: Cranfield University, 1998.
[5]	张小超，胡小安，张爱国，等. 基于称重法的联合收获机测产方法[J]. 农业工程学报，2010，26(3)：125－129.Zhang Xiaochao, Hu Xiaoan, Zhang Aiguo, et al. Method of measuring grain-flow of combine harvester based on weighing[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2010, 26(3): 125－129. (in Chinese with English abstract)
[6]	王薄，李民赞，张成龙，等. 冲击式谷物流量传感器设计与性能试验[J]. 农业机械学报，2009, 40(增刊1)：52－56.Wang Bo, Li Minzan, Zhang Chenglong, et al. Development of grain flow sensor for yield monitor system[J]. Transactions of the Chinese Society of Agricultural Machinery, 2009, 40(Supp.1): 52－56. (in Chinese with English abstract)
[7]	高建民，李杨波，郝磊斌，等. 压电式谷物质量流量传感器设计及试验[J]. 江苏大学学报：自然科学版，2011，32(2)：129－133.Gao Jianmin, Li Yangbo, Hao Leibin, et al. Design and test of a novel piezoelectric grain mass flow sensor[J]. Journal of Jiangsu University: Natural Science Edition, 2011, 32(2):129－133. (in Chinese with English abstract)
[8]	Choung Koun Lee, Michihisa Iida, Toshikazu Kaho, et al. Development of impact type sensor for heading feeding combine[J]. Journal of the JSAM, 2000, 62(4): 81－88.
[9]	Koichi Shoji, Tsuneo Kawamura, Hisashi Horio. Impact-based grain yield sensor with compensation for vibration and drift [J]. Journal of the JSAM, 2002, 64(5): 108－115.
[10]	周俊，周国祥，苗玉彬，等. 悬臂梁冲量式谷物质量流量传感器阻尼设计[J]. 农业机械学报，2005，36(11)：121－123，127.Zhou Jun, Zhou Guoxiang, Miao Yubin, et al. Damping design of impact-based grain yield sensor[J]. Transactions of the Chinese Society for Agricultural Machinery (Transactions of the CSAM), 2005, 36(11): 12l－123, 127. (in Chinese with English abstract)
[11]	陈树人，杨洪博，李耀明，等. 双板差分冲量式谷物流量传感器性能试验[J]. 农业机械学报，2010，41(8)：171－174.Chen Shuren, Yang Hongbo, Li Yaoming, et al. Experiment of dual-plates differential impact-based grain flow sensor[J]. Transactions of the Chinese Society for Agricultural Machinery, 2010, 41(8): 171－174. (in Chinese with English abstract)
[12]	胡均万，罗锡文，陈树人，等. 联合收割机产量传感器振动信号影响分析与消除方法[C].//2008年中国农业机械学会论文集，2008：857－860.Hu Junwan, Luo Xiwen, Chen Shuren, et al. Analysis the effects of vibration signal on combine yield sensor[C]// 2008 Chinese Society of Agricultural Machinery, 2008: 857－860. (in Chinese with English abstract)
[13]	陈树人，张文革，李相平，等. 冲量式谷物流量传感器性能实验研究[J]. 农业机械学报，2005，36(2)：82－84.Chen Shuren, Zhang Wenge, Li Xiangping, et al. Experiment research of grain mass flow sensor based on impact[J]. Transactions of the Chinese Society of Agricultural Machinery, 2005, 36(2): 82－84. (in Chinese with English abstract)
[14]	Reyniers M, De Baerdemaeker J. Comparison of two filtering methods to improve yield data accuracy[J]. Transaction of the American Society of Agricultural Engineers, 2005, 48(3): 909－916.
[15]	张凤传，张启峻，周晓云，等. 联合收割机产量传感器的信号处理[J]. 中国农机化，2004(4)：44－47.Zhang Fengchuan, Zhang Qijun, Zhou Xiaoyun, et al. Signal processing of the yield monitor for combine[J]. Chinese Agricultural Mechanization, 2004(4): 44－47. (in Chinese with English abstract)
[16]	周俊，刘成良. 平行梁冲量式谷物质量流量传感器信号处理方法[J]. 农业工程学报，2008，24(1)：183－187.Zhou Jun, Liu Chengliang. Signal processing method for impact-based grain mass flow sensor with parallel beam load cell [J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2008, 24(1): 183－187. (in Chinese with English abstract)
[17]	周俊，刘成良. 平行梁冲量式谷物质量流量传感器弹性元件设计[J]. 农业工程学报，2007，23(4)：110－114.Zhou Jun, Liu Chengliang. Load cell design for parallel beam impact-based grain mass sensor[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2007, 23(4): 110－114. (in Chinese with English abstract)
[18]	周俊，周国祥，苗玉彬，等. 悬臂梁冲量式谷物质量流量传感器阻尼设计[J]. 农业机械学报，2005，36(11)：121－123，127.Zhou Jun, Zhou Guoxiang, Miao Yubin, et al. Damping design of impact-based grain yield sensor[J]. Transactions of the Chinese Society for Agricultural Machinery (Transactions of the CSAM), 2005, 36(11): 12l－123,127. (in Chinese with English abstract)
[19]	胡均万，罗锡文，阮欢，等. 双板差分冲量式谷物流量传感器设计[J]. 农业机械学报，2009，40(4)：69－72.Hu Junwan, Luo Xiwen, Ruan Huan et al. Design of a dual-plate differential impact-based yield sensor[J]. Transactions of the Chinese Society for Agricultural Machinery (Transactions of the CSAM), 2009, 40(4): 69－72. (in Chinese with English abstract)
[20]	胡均万，罗希文，陈树人，等. 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（增刊）：57－60.Hu Junwan, Luo Xiwen, Chen Shuren, et al. Zero-drift compensation of impact-based grain flow sensor for tilted combine harvester[J]. Transactions of the Chinese Society of Agricultural Machinery, 2009, 40(Supp.): 57－60. (in Chinese with English abstract)
[21]	丛秉华，周俊. 双平行梁谷物流量传感器振动噪声消除方法[J]. 传感技术学报，2013，26(3)：377－381.Cong Binghua, Zhou Jun. Vibration noise elimination for a grain flow sensor of dual parallel beam load cells[J]. Chinese Journal of Sensors and Actuators, 2013, 26(3): 377－381. (in Chinese with English abstract)
[22]	陈树人，仇华铮，李耀明，等. 谷物流量传感器试验台的设计与试验[J]. 农业工程学报，2012，28(16)：41－ 46.Chen Shuren, Qiu Huazheng, Li Yaoming, et al. Design and experiment of test-bed for grain flow sensor[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2012, 28(16): 41－46. (in Chinese with English abstract)
[23]	杨忠仁，饶程，邹建. 基于LabVIEW数据采集系统[J]. 重庆大学学报：自然科学版，2004，27(2)：32－35.Yang Zhongren, Rao Cheng, Zou Jian, et al. Study on DAQ system by using LabVIEW[J]. Journal of Chongqing University: Natural Science Edition, 2004, 27(2): 32－35. (in Chinese with English abstract)
[24]	杨乐平. LabVIEW程序设计与应用[M]. 北京：电子工业出版社，2001.
[25]	姚素芬，赵建强，冯超群，等. 基于LabVIEW传感器实验平台的开发[J]. 仪器仪表学报，2005（增刊1）：466－467.Yao Sufen, Zhao Jianqiang, Feng Chaoqiong. Development of sensor experimental platform based on LabVIEW[J]. Chinese Journal of Scientific Instrument, 2005(Supp.1): 466－467. (in Chinese with English abstract)