长距离激光测量中光束漂移的自动补偿

杨滨赫; 蔡引娣; 文志祥; 凌四营

doi:10.37188/OPE.20202811.2393

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长距离激光测量中光束漂移的自动补偿

现代应用光学 | 更新时间：2020-12-09

- 长距离激光测量中光束漂移的自动补偿
- Automatic compensation method for beam drift in long-distance laser measurement
- 光学精密工程 2020年28卷第11期页码：2393-2402
- 作者机构：
  
  大连理工大学机械工程学院, 辽宁大连 116024
- 作者简介：
  
  [ "杨滨赫(1995-)，男，辽宁沈阳人，硕士研究生，2017年于大连理工大学获得学士学位，主要从事光学测量的研究。E-mail：18840825425@163.com" ]
  蔡引娣(1988-)，女，甘肃人，副教授，2010年于兰州理工大学获得学士学位，2012年于重庆大学获得硕士学位，2017年于日本东北大学获得博士学位，主要从事基于激光测量原理的几何运动误差测量和误差补偿的研究。E-mail：caiyd@dlut.edu.cn CAI Yin-di, E-mail:caiyd@dlut.edu.cn
- 基金信息：
  
  国家自然科学基金资助项目(51905078);国家重点研发计划项目“制造基础技术与关键部件”重点专项(2018YFB2001400);国家重点研发计划资助项目(2017YFF0204800)
- DOI：10.37188/OPE.20202811.2393
  中图分类号： TN249
- 收稿日期：2020-07-01，
  
  修回日期：2020-08-17，
  
  录用日期：2020-8-17，
  
  纸质出版日期：2020-11-25
- 稿件说明：
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杨滨赫, 蔡引娣, 文志祥, 等. 长距离激光测量中光束漂移的自动补偿[J]. 光学精密工程, 2020,28(11):2393-2402.

Bin-he YANG, Yin-di CAI, Zhi-xiang WEN, et al. Automatic compensation method for beam drift in long-distance laser measurement[J]. Optics and precision engineering, 2020, 28(11): 2393-2402.
杨滨赫, 蔡引娣, 文志祥, 等. 长距离激光测量中光束漂移的自动补偿[J]. 光学精密工程, 2020,28(11):2393-2402. DOI： 10.37188/OPE.20202811.2393.

Bin-he YANG, Yin-di CAI, Zhi-xiang WEN, et al. Automatic compensation method for beam drift in long-distance laser measurement[J]. Optics and precision engineering, 2020, 28(11): 2393-2402. DOI： 10.37188/OPE.20202811.2393.

摘要

为了提高半导体激光器的光束稳定性，减少长距离测量中激光光束的漂移，本文设计了基于BP神经网络结合PID控制(BPNN-PID)的双反射镜激光器光束漂移自动补偿系统。在该系统中，将两个四象限光电探测器分别置于测量近端和测量远端，作为激光光束漂移的测量单元；用两个带有压电陶瓷致动器(PZT)的二维角度调整架作为激光光束方向的调整单元。建立了激光光束漂移量与调整单元角度变化的模型，并根据测量单元的输出，通过BPNN-PID方法反馈控制调整单元的角度，从而自动补偿激光光束漂移。实验结果表明：使用该激光器光束漂移补偿方法，在15 min时间内，用于测量直线度误差和角度误差的激光测量系统的稳定性在测量距离1 m处，分别从未控制时的±9

m和±5"提高到了±3

m和±1.5"。

Abstract

To improve the stability of LDs and reduce the laser beam drift in long-distance measurement

a BPNN-PID-based dual-mirror laser-beam drift compensation method was proposed. Two four-quadrant photodetectors

which were placed at the near and far ends of the measurement position

were employed to measure the laser beam drifts. Two 2D precision-angle mirror mounts integrated with two piezoelectric actuators were used to adjust the propagation direction of the laser beam. A model relating the laser beam drift and the angular variation of the angle mirror mounts was established. The angular variation was then fed back with the proposed BPNN-PID method based on the output of the laser beam drift detector

from which the laser beam drift can be automatically compensated. It was verified that the signal stabilities of a laser measurement system that was used for measuring the straightness and angular errors of linear stages improved from ±9

m and ±5" without laser-beam drift compensation to ±3

m and ±1.5" with laser-beam drift compensation over 15 minutes.

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Keywords

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