Calibration of beam direction of laser displacement sensor based on spherical target

BI Chao; FANG Jian-guo; LIU Jing-liang; LIU Yong; LI Cheng-wei

doi:10.3788/OPE.20152303.0678

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Calibration of beam direction of laser displacement sensor based on spherical target

更新时间：2020-08-13

- Calibration of beam direction of laser displacement sensor based on spherical target
- Optics and Precision Engineering Vol. 23, Issue 3, Pages: 678-685(2015)
- 作者机构：
  
  北京航空精密机械研究所精密制造技术航空科技重点实验室北京,100076
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152303.0678
  CLC： TP212.12;TN249
- Received：09 September 2014，
  
  Revised：08 October 2014，
  
  Published：25 March 2015
- 稿件说明：
移动端阅览
毕超, 房建国, 刘京亮等. 基于球形目标的激光位移传感器光束方向标定[J]. 光学精密工程, 2015,23(3): 678-685

BI Chao, FANG Jian-guo, LIU Jing-liang etc. Calibration of beam direction of laser displacement sensor based on spherical target[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 678-685
毕超, 房建国, 刘京亮等. 基于球形目标的激光位移传感器光束方向标定[J]. 光学精密工程, 2015,23(3): 678-685 DOI： 10.3788/OPE.20152303.0678.

BI Chao, FANG Jian-guo, LIU Jing-liang etc. Calibration of beam direction of laser displacement sensor based on spherical target[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 678-685 DOI： 10.3788/OPE.20152303.0678.

摘要

搭建了非接触式的三坐标测量系统以便精密测量三维型面。将激光位移传感器通过具有两个回转轴的回转体安装在测量机的

轴上

从而可根据待测表面的形状来调整传感器的方位。为了使传感器在各个方位上实现测量功能

提出了基于球形目标的光束方向标定方法

并详细阐述了其数学原理。标定时

驱动测量机使传感器分别沿测量机的

Y和Z

轴做等间距步进

根据步长和激光束长度的变化建立方程组求解出激光束所在直线的单位方向向量。最后

多次测量尺寸参数已知的六面体标准块规

检验了该测量系统的重复性。结果显示

该系统的测量不确定度为0.048 mm;测量另一直径已知的被测球时

传感器在各个方位上的误差小于0.05 mm

表明所提出的标定方法使测量系统达到了逆向工程的使用要求。得到的数据表明

本文所提出的方法有较高的标定精度和较好的重复性

为实现三维型面的快速扫描测量奠定了基础。

Abstract

A non-contact three coordinate measuring system was established to implement the measurement of 3D free-form surfaces accurately. A laser sensor was installed on the

axis of a coordinate measuring machine via a probe head with two rotary axes

whose direction could be adjusted according to the shape of the measured surface. For the purpose of enabling the sensor to realize measurement functions in every orientations

a calibration method of laser beam direction based on a spherical target was proposed

and its principle was analyzed in detail. In the calibration procedure

the sensor moved in an equal distance along

and

axes and then equation sets were set up based on the bundle equations to compute the unit direction vector of the laser beam. Finally

a cube block with known dimensions was measured by the system to test the repeatability of the measuring system. The experimental result indicates that the measuring uncertainty of the system is 0.048 mm

which shows the good practicability of the calibration method. When the system was used to measure a sphere with a known diameter

the errors in every orientations are all smaller than 0.05 mm

which manifests that the calibration method proposed meets the requirements of reverse engineering. The method shows higher calibration precision and repeatability

and lays a basis for fast scanning of 3D free-form surfaces.

关键词

Keywords

references

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周森, 郭永彩, 高潮, 等. 基于三维激光扫描的移动大尺寸圆柱体工件长度快速检测系统 [J]. 光学精密工程, 2014, 22(6):1524-1530. ZHOU S, GUO Y C, GAO CH, et al.. Rapid length measuring system for mobile and large scale cylinder workpieces based on 3D laser scanning [J]. Opt. Precision Eng., 2014, 22(6):1524-1530. (in Chinese)

出晓兰, 王磊, 胡天林, 等. 坐标测量机激光位移测头的标定方法研究 [J]. 仪器仪表学报, 2008, 29(4):426-429. CHU X L, WANG L, HU T L, et al.. Study on calibration method of laser displacement sensor coordinates measurement machine [J]. Chinese Journal of Scientific Instrument, 2008, 29(4):426-429. (in Chinese)

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周会成, 曾理湛, 陈吉红, 等. 点光源测头光束方向的标定 [J]. 仪器仪表学报, 2004, 25 (3):388-391. ZHOU H CH, ZENG L ZH, CHEN J H, et al.. Calibration of light beam's direction of point light source probe [J]. Chinese Journal of Scientific Instrument, 2004, 25(3):388-391. (in Chinese)

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Related Institution

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