摘要
为了进一步提高小麦联合收获机谷物测产系统的准确性与稳定性,本文在第1代基于光电漫反射原理的小麦联合收获机测产装置基础上,结合定量螺旋输送原理,设计了一套联合收获机测产误差动态自校准系统,提出了一种在联合收获机动态条件下,测产误差自动进行反馈校准的方法。该系统由谷物体积传感器、卸粮转速传感器、粮仓粮位传感器、数据采集与处理模块、显示终端和误差反馈校准软件组成。2020年6月在北京市小汤山国家精准农业研究示范基地分别进行了卸粮转速传感器性能试验、室内螺旋输送台架试验和室外田间动态自校准性能验证试验。卸粮转速传感器性能试验结果表明卸粮转速传感器相对误差小于2%。台架试验结果表明,在不同的卸粮转速下,系统监测值与实际输出值误差不大于2.5%,定量螺旋输送谷物瞬时流量与转速呈线性关系,R2达到0.9937。田间试验表明,采用测产误差动态自校准方法的测量误差在-2.95%~3.13%,比未使用该方法的测产装置测量结果降低了0.45个百分点,同时系统的误差波动减小。测产误差动态自校准方法为小麦田间产量信息的准确获取提供了一种新的测量手段。
It is one of the most important information to obtain accurate grain yield for precision agriculture.In order to further improve the accuracy and stability of grain yield monitor system,a new dynamic self-calibration method which was based on the first generation of photoelectric grain yield monitor system and the principle of quantitative screw conveying was designed.The system was composed of grain volume sensor,unloading grain cylinder speed sensor,grain tank state sensor,data acquisition and processing module,display terminal and error feedback calibration software.In order to verify the accuracy of the system,the simulation test of quantitative screw conveying which was at different rotation speeds and different inclination angles was carried out.In June 2020,the field performance experiments were carried out at Beijing Xiaotangshan National Precision Agriculture Research and Demonstration Base.The performance test results of the unloading speed sensor showed that the error of the unloading speed sensor was less than 2%.Bench test results showed that the error between the monitored value of the system and the actual output value was less than 2.5%at different unloading speeds.There was a linear correlation between the flow rate and the rotational speed,and the correlation coefficient was 0.9937.The field error dynamic self-calibration experiment result showed that the relevant error was-2.95%~3.13%,which was decreased by 0.45 percentage points compared with that of the measuring device without this system.At the same time,the error fluctuation of the system was reduced.The dynamic self-calibration system provided a new method to improve the accuracy of grain yield monitor.
作者
周永华
易志祥
罗长海
李立伟
安晓飞
张安琪
ZHOU Yonghua;YI Zhixiang;LUO Changhai;LI Liwei;AN Xiaofei;ZHANG Anqi(School of Electrical Engineering,Guangxi University,Nanning 530004,China;National Research Center of Information Technology for Agriculture,Beijing 100097,China;Beijing Research Center of Information Technology for Agriculture,Beijing 100097,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2020年第S02期147-153,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
现代农业产业技术体系专项资金项目(CARS03)
国家重点研发计划项目(2016YFD0700300、2016YFD0700303)。
关键词
联合收获机
小麦
测产误差
自校准
combine harvester
grain
yield monitoring error
self-calibration
