基于机器视觉的阀芯自动装配系统

针对球阀阀芯自动装配过程中存在装配柔性低、时常无法精确定位的问题,基于机器视觉技术,构建了一套在线机器视觉系统.采用NI Vision Assistant模块对系统及图像进行快速、准确的标定,并在其中对零件图像进行预处理、模式匹配以及边缘检测等修正处理.在LabVIEW中调用Vision Assistant节点,得出零...

Valve Spool Automatic Assem bling System Based on Machine Vision

In order to solve inflexible assembling and inaccurate locating in ball valvespool’s automatic assembly,a set of on-line machine vision system based on machine vision was established.The module of NI Vision Assistant was used to make quick and accurate calibration to the system and image,by which the image of parts was preprocessed,pattern matched and edge detected.The node of Vision Assistant in LabVIEW was callouted to define the position and acquire the angle information of the parts,with which communication with the next-bit machine via Ethernet was carried out,and robotic assembly changed dynamically.The experimental method was authenticated on line on hardware experiment platform.The result shows that the method adopted by the system is feasible,stable and meets the requirements of valve spool’s assembling with rapidity and accuracy.