光学 精密工程, 2014, 22 (6): 1486, 网络出版: 2014-06-30
激光投线仪的多维校准系统
Multi-dimensional calibration system for laser demarcation instrument
激光投线仪 校准系统 平行光管 机器视觉 混合编程 laser demarcation instrument calibration system collimator machine vision mixed programming
摘要
分析了激光投线仪的工作原理及其基准误差的产生原因。基于此, 提出了一种新型的激光投线仪校准系统, 用于弥补传统校准方式占地面积大、精度值难以量化、人为因素影响较大等缺点。研究了一套采用平行光管角度测量与机器视觉测量结合的检测方法, 通过检测激光线的直线度和垂直度来实现仪器的校准。该系统由8个采样管构成数据采集平台, 从而达到多维校准的要求。采用VC++与Matlab混合编程的方式编写系统软件, 通过调用动态链接库的方式使两种语言相结合。实验测试表明, 该系统操作简单, 效率高; 与传统校准方式相比, 其节约了场地长度, 整个系统的占用空间控制在8 m3以内; 另外, 系统提高了校准精度, 其水平线和铅垂线平均精度可以达到±0.2 mm/5 m, 正交线精度可以达到±23″。
Abstract
The working principles of Laser Demarcation Instruments (LDIs) and their standard errors were analyzed. A new set of Multi-dimensional Calibration System (MDCS) for the LDIs was developed to solve these shortcomings of traditional calibration systems on larger floor spaces, poor accuracy and high influential artificial factors. A solution based on collimator angle measurement and machine vision measurement was designed to calibrate the LDI by measuring the straightness and verticality of laser lines. The data capturing platform of the system consisted of 8 collimators was used to achieve the multi-dimensional calibration. The software was designed by mixed programming of VC++ and Matlab, and they were connected by calling a Dynamic Lined Library(DLL). Experiments show that the new system is easy to operate, and is more efficient and more credible. The space that the whole system takes up is within 8 m3, which saves the area of work place. Moreover, the accuracy of horizontal and vertical lines can reach ±0.2 mm/5 m, and the orthogonal line is ±23″, which meets the requirement of calibration accuracy.
刘盼盼, 许流博, 乐意, 陈少阳, 许贤泽. 激光投线仪的多维校准系统[J]. 光学 精密工程, 2014, 22(6): 1486. LIU Pan-pan, XU Liu-bo, LE Yi, CHEN Shao-yang, XU Xian-ze. Multi-dimensional calibration system for laser demarcation instrument[J]. Optics and Precision Engineering, 2014, 22(6): 1486.