基于机器视觉的柔性接头摆心飘移检测系统的研究  

RESEARCH ON THE MEASUREMENT SYSTEM FOR FLEXIBLE JOINT'S PIVOT POINT DRIFT BASED ON MACHINE VISION

作　　者：文跃兵 谭建平[2] 王宪[2] 李楷模 

机构地区：[1]湖南工业职业学院,长沙410082 [2]中南大学机电工程学院,长沙410083

出　　处：《机械强度》2015年第1期23-27,共5页Journal of Mechanical Strength

基　　金：国家863项目"300MN模锻水压机状态监测及故障诊断研究(2007AA04Z417)";湖南科技厅项目 ( XJK012BZJ017) 资助~~

摘　　要：研究一种基于机器视觉的柔性接头平面摆动摆心飘移测试系统。所述系统包括相机支架、标志物、图像处理模块、摆心计算模块、结果处理模块、工业相机、数据接口、工业计算机及其他辅助装置。两个标志物几何中心定位在与被测摆动体中心线成一定角度的直线上,标志物随摆动体摆动时,工业相机对摆动体进行连续图像采样,图像数据通过数据接口传输给工业计算机,图像处理模块对图像进行去噪、背景剪除、标志物定位操作,获取标志物在测试系统坐标系的平面坐标,摆心计算模块依据数学模型计算得出两次图像采样区间的平均摆心来逼近摆动体运动过程中的瞬时摆心,结果处理模块对摆心飘移曲线进行直观有效的显示与记录。最后通过仿真和实验验证了使用该测试系统所测试的物体摆心检测精度达0.5%左右。A certain measurement system for flexible joint＇ s pivot point drift has been studied in this paper. The detection system consists of camera bracket, signposts, image processing module, pivot point calculation module, result processing module, industrial camera, data interface, industrial computer and some other auxiliary devices. Two signposts are fixed on the line at a certain angle to the center line of the swinging body to be measured. When the signposts swing together with the swinging body, the industrial camera will take continues samples from it. Then the samples will be transferred to the industrial computer by the data interface. After that the image processing module will get the signposts＇ position in the measurement system plane coordinates by images denoising, background subtraction and signposts positioning. With this information the pivot point calculation module will calculate the average pivot point of two different samples to approach the momentary pivot position while the swinging body swings according to the mathematic model. The result processing module will record and visualize the pivot point movement trajectory. The precision of this measurement system is about 0. 5% which has been checked by simulation and proved by test.

关 键 词：摆心漂移 机器视觉 图像处理 

分 类 号：TG315.42[金属学及工艺—金属压力加工]