打结器运动图像与捆绳张力信息同步获取系统研究  

Synchronous Acquiring System about Information of Bale Knotter Movement and Cord Tension

作　　者：张安琪[1] 陈龙健[1] 李诚[1] 张绍英[1] 李海涛[1] 韩鲁佳[1] 

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《农业机械学报》2015年第10期31-37,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：长江学者和创新团队发展计划资助项目(IRT1293)

摘　　要：在已有方捆机上搭建了一套可实时同步获取打结器运动图像和捆绳张力信息的试验系统。开发了用于同步触发高速摄影与张力传感器的同步模块,通过在1 000 Hz频率参数环境下进行试验,分析高速摄影捕捉到的目标图片数与张力传感器捕捉到的目标数据点数,发现二者数目相同,且不同组打结过程打结器运动特征点与捆绳张力部分峰值点对应齿盘度数的变异系数均小于3%。基于所得运动图像信息与张力信息得出了打结器各机构的运动时序范围,确定了揽绳器、钩钳、脱绳杆等机构的详细运动时序。The bale knotter is the core components of the baler. To understand the working principle of the bale knotter more deeply,more and more researchers have built varieties of the knotter test bench.But this bale knotter test bench could not get the motion state of D-bale knotter and the tension of cord synchronous in the process of straw baling,a set of D-bale knotter movement and cord tension information synchronous acquiring system in real time was set up in the existing square baler. In order to achieve the goal of synchronous acquiring information,a synchronization module was designed for synchronous trigger high-speed photography and tension sensor. In order to verify performance of the system,a test was carried out under the condition of 1 000 Hz. The object of this test was wheat straw. Four groups of tests were carried out. From the tests it can be found that the number of target images captured by the highspeed photography and the number of target data captured by tension sensor were the same,and the feature points of D-bale knotter movement and variation coefficient of peaks of cord tension corresponding to the tooth plate degree was less than 3% in different sets of the tests. From the tests it could be known that the system can get the information of D-bale knotter movement and cord tension at the same time.The motion sequence range of D-bale knotter was obtained based on the information of knotter movement and cord tension. The motion sequence was more accurate than the existed motion sequence got by other researchers. The accurate motion sequence chart of the rope disc,bill hook and knife lever were got from the motion sequence. It could help to understand the working principle of D-bale knotter more clearly.The synchronous acquiring system built the foundation of the geometrical conditions for D-bale knotter. It was very useful for the research of D-bale knotter.

关 键 词：打结器 捆绳 运动图像 张力 同步 

分 类 号：S817.115[农业科学—畜牧学]