联合收获机喂入量监测系统信号分析与处理
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摘要
为实现对联合收获机喂入量的准确测量,降低作业环境和机器振动对测量精度的影响,对喂入量监测系统的扭矩信号、转速信号和GPS信号进行了分析与处理方法研究。根据GPS信号格式对其进行了有效信息提取、高斯投影变换和作业参数计算;根据转速脉冲信号计算转速,并对其进行插值;对扭矩信号进行了分析和双阈值滤波,对信号插值方法和降噪方法进行了对比测试。以田间采集喂入量信号为样本,对扭矩信号进行双阈值滤波、插值和降噪,对比了不同插值方法的预测效果和不同滤波方法的降噪效果。结果表明,在样本范围内,分段线性插值和自适应滤波效果优于其他方法,经信号处理后的喂入量测量平均相对误差为12. 5%,在一定程度上能够满足联合收获机喂入量监测的实际需要。
Aiming to achieve accurate measurement of the feedrate,reduce the influence of the working environment and the vibration interference of the combine harvester on the measurement accuracy of the feedrate,improve the practical effect of the feedrate monitoring system,and study the feedrate signal processing method,including torque signal filtering noise reduction,GPS signal analysis and operation parameters calculation and speed signal calculation and interpolation,taking the feedrate signal in the field as a sample,the threshold signal was filtered by double threshold,and the prediction effect of different interpolation methods and the noise reduction effects of different filtering methods were compared. The experimental results showed that the piecewise linear interpolation and adaptive filtering were better than other methods in the sample range. The average error of feedrate prediction after data processing was 12. 5%,which can meet the actual needs of combine harvester feedrate monitoring to a certain extent.
Aiming to achieve accurate measurement of the feedrate,reduce the influence of the working environment and the vibration interference of the combine harvester on the measurement accuracy of the feedrate,improve the practical effect of the feedrate monitoring system,and study the feedrate signal processing method,including torque signal filtering noise reduction,GPS signal analysis and operation parameters calculation and speed signal calculation and interpolation,taking the feedrate signal in the field as a sample,the threshold signal was filtered by double threshold,and the prediction effect of different interpolation methods and the noise reduction effects of different filtering methods were compared. The experimental results showed that the piecewise linear interpolation and adaptive filtering were better than other methods in the sample range. The average error of feedrate prediction after data processing was 12. 5%,which can meet the actual needs of combine harvester feedrate monitoring to a certain extent.
引文
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[20]张超.车载通讯服务器的设计与实现[D].长春:吉林大学,2015.ZHANG Chao.The design and implementation of vehicular communication server[D].Changchun:Jilin University,2015.(in Chinese)
[21]李静林.下一代网络通信协议分析[M].北京:北京邮电大学出版社,2010.
[22]张振乾,刘仁杰,张漫,等.基于移动终端的谷物产量实时监测平台设计[J].农业机械学报,2017,48(增刊):35-39.ZHANG Zhenqian,LIU Renjie,ZHANG Man,et al.Design and development of real-time monitoring platform for grain yield based on mobile terminal[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(Supp.):35-39.(in Chinese)
[23]沙莎.基于WSN的农业信息监测平台设计与开发[D].北京:中国农业大学,2015.SHA Sha.Design and development of an agriculture information monitoring platform based on WSN[D].Beijing:China Agricultural University,2015.(in Chinese)
[24]禹精达.传动轴扭矩测量技术及精度分析[D].太原:中北大学,2012.YU Jingda.The drive shaft torque measurement technology&precision analysis[D].Taiyuan:North University of China,2012.(in Chinese)
[25]陈红丽,曹义亲.边缘定向的双立方插值算法的研究与应用[J].计算机仿真,2015,32(4):180-183.CHEN Hongli,CAO Yiqin.Study and application on edge-directed CC interpolation[J].Computer Simulation,2015,32(4):180-183.(in Chinese)
[2]刘同山.农业机械化、非农就业与农民的承包地退出意愿[J].中国人口·资源与环境,2016,26(6):62-68.LIU Tongshan.Agricultural mechanization,nonfarm work and farmers’willingness to abdicate contracted land[J].China Population,Resources and Environment,2016,26(6):62-68.(in Chinese)
[3]陈度,王书茂,康峰,等.联合收获机喂入量与收获过程损失模型[J].农业工程学报,2011,27(9):18-21.CHEN Du,WANG Shumao,KANG Feng,et al.Mathematical model of feeding rate and processing loss for combine harvester[J].Transactions of the CSAE,2011,27(9):18-21.(in Chinese)
[4]GROBLER W H,HOENL J,LUEHRMANN E,et al.Combine harvester:EP,EP0212185[P].1990.
[5]陈金虎.中国农业机械化发展存在问题分析与对策研究[D].荆州:长江大学,2012.CHEN Jinhu.Analysis on China’s agricultural mechanization development problems and research on countermeasures[D].Jingzhou:Yangtze University,2012.(in Chinese)
[6]VAN LOO J.An automatic feedrate control system for a combine harvester[D].Wageningen:Agricultural University,1977.
[7]丁文才.联合收获机喂入量检测方法和传感器研究[D].北京:中国农业大学,2011.DING Wencai.Combine harvester feeding quantity detection method and sensor research[D].Beijing:China Agricultural University,2011.(in Chinese)
[8]刘元元,刘卉,尹彦鑫,等.基于功率监测的联合收获机喂入量预测方法[J].中国农业大学学报,2017,22(11):157-163.LIU Yuanyuan,LIU Hui,YIN Yanxin,et al.Feeding assessment method for combine harvester based on power measurement[J].Journal of China Agricultural University,2017,22(11):157-163.(in Chinese)
[9]KRUSE,JAMES W.Microprocessor based combine ground speed controller[D].West Lafayette:Purdue University,1981.
[10]EDERVEEN J.Harvest more for harvester control[J].Diesel Progress North American,1982,10:14-15.
[11]介战,周学健.喂入量传感器测试模型研究[J].农业机械学报,2001,32(5):53-55.JIE Zhan,ZHOU Xuejian.Study on mathematical model of feed quantity sensor measuring[J].Transactions of the Chinese Society for Agricultural Machinery,2001,32(5):53-55.(in Chinese)
[12]介战,罗四倍,周学建.基于Lab VIEW的联合收获机水稻喂入量遥测试验[J].农业工程学报,2009,25(增刊2):87-91.JIE Zhan,LUO Sibei,ZHOU Xuejian.Lab VIEW-based telemetering experiments of rice feed quantity for combined harvester[J].Transactions of the CSAE,2009,25(Supp.2):87-91.(in Chinese)
[13]陈进,李耀明,季彬彬.联合收获机喂入量测量方法[J].农业机械学报,2006,37(12):76-78.CHEN Jin,LI Yaoming,JI Binbin.Study on measurement method of combine feed quantity[J].Transactions of the Chinese Society for Agricultural Machinery,2006,37(12):76-78.(in Chinese)
[14]唐忠,李耀明,徐立章,等.切纵流联合收获机小麦喂入量预测的试验研究[J].农业工程学报,2012,28(5):26-31.TANG Zhong,LI Yaoming,XU Lizhang,et al.Experimental study on wheat feed rate of tangential-axial combine harvester[J].Transactions of the CSAE,2012,28(5):26-31.(in Chinese)
[15]FRIESEN O H,ZOERB G C,BIGSBY F W.For combines:controlling feedrates automatically[J].Agricultural Engineering,1966,47(8):434-435.
[16]JOHN S,MICHAEL P M,GARY W K.Combine feedrate sensors[J].Transactions of the ASAE,1985,28(Supp.):2-5.
[17]卢文涛,刘宝,张东兴,等.谷物联合收获机喂入量建模与试验[J].农业机械学报,2011,42(增刊):82-85.LU Wentao,LIU Bao,ZHANG Dongxing,et al.Experiment and feed rate modeling for combine harvester[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(Supp.):82-85.(in Chinese)
[18]尤惠媛,卢文涛.联合收获机喂入量模糊控制系统研究[J].西北农林科技大学学报(自然科学版),2015,43(5):229-234.YOU Huiyuan,LU Wentao.Fuzzy control system for feed quantity of combine harvester[J].Journal of Northwest A&FUniversity(Natural Science Edtion),2015,43(5):229-234.(in Chinese)
[19]梁学修,陈志,张小超,等.联合收获机喂入量在线监测系统设计与试验[J].农业机械学报,2013,44(增刊2):1-6.LIANG Xuexiu,CHEN Zhi,ZHANG Xiaochao,et al.Design and experiment of on-line monitoring system for feed quantity of combine harvester[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(Supp.2):1-6.(in Chinese)
[20]张超.车载通讯服务器的设计与实现[D].长春:吉林大学,2015.ZHANG Chao.The design and implementation of vehicular communication server[D].Changchun:Jilin University,2015.(in Chinese)
[21]李静林.下一代网络通信协议分析[M].北京:北京邮电大学出版社,2010.
[22]张振乾,刘仁杰,张漫,等.基于移动终端的谷物产量实时监测平台设计[J].农业机械学报,2017,48(增刊):35-39.ZHANG Zhenqian,LIU Renjie,ZHANG Man,et al.Design and development of real-time monitoring platform for grain yield based on mobile terminal[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(Supp.):35-39.(in Chinese)
[23]沙莎.基于WSN的农业信息监测平台设计与开发[D].北京:中国农业大学,2015.SHA Sha.Design and development of an agriculture information monitoring platform based on WSN[D].Beijing:China Agricultural University,2015.(in Chinese)
[24]禹精达.传动轴扭矩测量技术及精度分析[D].太原:中北大学,2012.YU Jingda.The drive shaft torque measurement technology&precision analysis[D].Taiyuan:North University of China,2012.(in Chinese)
[25]陈红丽,曹义亲.边缘定向的双立方插值算法的研究与应用[J].计算机仿真,2015,32(4):180-183.CHEN Hongli,CAO Yiqin.Study and application on edge-directed CC interpolation[J].Computer Simulation,2015,32(4):180-183.(in Chinese)
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