基于NI的疲劳裂纹扩展试验摄像头运动控制系统  

Camera movement control system in fatigue crack propagation test based on NI technology

作　　者：周寅[1] 高红俐[1] 钟建飞[1] 沈姗姗[1] 云艳[1] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,浙江杭州310014

出　　处：《机电工程》2012年第1期58-61,65,共5页Journal of Mechanical & Electrical Engineering

基　　金：浙江省科技计划(面上)科研资助项目(2007C21080)

摘　　要：针对疲劳裂纹在线检测的问题,提出了基于NI运动控制技术的疲劳裂纹扩展试验摄像头运动控制方法。该系统主要包括CCD摄像机、镜头、云台、NI-PCI-7334运动控制卡、光源照明系统、NI-PCI-1410图像采集卡、计算机以及安装在计算机内的图像处理软件和上位机运动控制软件。根据摄像头在图像采集过程中的动作要求,设计了运动控制方案,采用NI Motion软件包开发了四轴运动控制程序。实验结果显示,该系统可以实现疲劳试验中摄像头单步/连续运动及试验过程中的裂纹自动跟踪,摄像头定位精度达到0.05 mm。Aiming at the problem of on-line fatigue crack detection, a camera motion control method applied to the fatigue crack propagation test based on NI technology was supplied. The system includes CCD cameras, lenses, PTZ, motion control card PCI-7334, a lighting device, image acquisition card PCI-1410, computer with the image processing software and PC movement control software. In accordance with the camera movement requirements during image acquisition, the motion control structure was designed, four-axles movement control application software was developed with NI Motion tool. The experiment results show that the single step/continue movement and automatic tracking of the cameras are nerformed during the fatiuue test and the camera position control accuracy reaches O. 05 ram.

关 键 词：疲劳裂纹扩展试验 电荷耦合器件 步进电机 运动控制 NI MOTION 

分 类 号：TH871.3[机械工程—仪器科学与技术] TH74[机械工程—精密仪器及机械]