摘要
在疲劳裂纹扩展试验中,疲劳裂纹的自动跟踪是十分必要的。针对疲劳裂纹自动跟踪的问题,首先建立起了以步进电机为运动机构的摄像头云台系统,使用ARM作为步进电机控制器,然后由PC机对摄像头采集到的裂纹图像进行图像处理并转化为电机运动控制信号,最后将控制信号通过串口传送到ARM中。研究结果表明,摄像头运动系统定位精度为0.05 mm,重复定位精度为0.02 mm,达到所期望的控制精度,裂纹自动跟踪的效果也比较理想。
It is necessary to track fatigue crack automatically in the fatigue test.Aiming at the automatic tracking of the fatigue crack,firstly,a tilt system of camera was set up by stepping motor for sports organizations,and ARM was used as a stepping motor controller,then the crack image which was acquired by the camera was processed by the PC and translated into motion control signal of stepping motor,finally the control signal was transmitted to ARM through a serial port.The results indicate that the camera＇s motion control system has the desired control accuracy with the 0.05 mm positioning accuracy and the 0.02 mm repetitive positioning accuracy,the effect of the crack tracking is ideal also.
出处
《机电工程》
CAS
2011年第12期1448-1452,共5页
Journal of Mechanical & Electrical Engineering
基金
浙江省省级科技计划一般(面上)科研资助项目(2007C21080)
关键词
串口通信
ARM
裂纹跟踪
步进电机
运动控制
serial communication
ARM
crack tracking
stepping motor
motion control
