基于PMAC控制卡的激光扫描尺寸测量系统  

Laser Scanning Dimensional Measurement System Based on PMAC

作　　者：沈智娟[1] 杨贺来[1] 王淑芬[2] 张为民[3] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100083 [2]河北理工大学计算中心,河北唐山063009 [3]北京航空制造工程研究所,北京100024

出　　处：《现代电子技术》2009年第14期172-175,共4页Modern Electronics Technique

基　　金：航空科学基金资助项目(2006ZD25)

摘　　要：针对常见的工件一维尺寸检测问题,提出了一种新的基于PMAC运动控制卡的激光扫描检测方案。该方案通过激光扫描给出被测物的边沿信号,通过对此信号的检测,PMAC卡会锁存相应的被测物边沿位置。通过对两边沿的位置捕获就可完成尺寸测量。这一方案的实现需要设置PMAC卡的位置捕获功能,并编写负责位置采集的PLC程序。实际测量结果显示,比容易实现的测量方案更能满足大部分工业测量的要求。实验表明,通过进行多次测量实验可获得该测量系统边沿定位变值系统误差的经验函数,在根据此函数对误差进行补偿后,系统精度进一步得到提高。Aimed at the parts＇ dimensional measurement application, a new laser scanning method based on PMAG control card is proposed. The laser scanning system can give PMAC the signal of the objeet＇s edge,and PMAC can capture the grating ruler＇s position according the signal. The dimension is deducted once the objeet＇s both edges＇ position is captured. PMAC＇s position capture feature and data gather PLC program is needed to realize this method. The resulting system＇s accuracy is good enough for most industry measurement. With large sum of experiments,the empirical function of the system＇s unsteady system error can be obtained,with the help of which,the accuracy is further improved by system error correction.

关 键 词：尺寸测量 PMAC应用 激光扫描应用 数据处理 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]