直射式激光位移传感器光束入射角对测量精度的影响
宋腾，张凤生，任锦霞
（青岛大学 机电工程学院，山东 青岛 266071）
摘要：针对激光位移传感器测距精度受光束入射角影响的问题，给出了一种测量入射角与位移测量精度之间关系的实验方法。通过实验得出如下结论：随着入射角α的增大，传感器测得的距离小于实际距离，其值随α的增大而增大。对于不同的被测表面，当α小于一定角度时，位移测量误差受α影响较小，而当α大于这一角度时，测量误差明显增大，甚至出现测量失真。而且，相同入射角α情况下，被测件表面光洁度高，则测量误差小。
关键词：激光位移传感器；三角测量法；车轮踏面测量
中图分类号：TH741 文献标志码：A doi：10.3969/j.issn.1006-0316.2017.02.010
文章编号：1006－0316 (2017) 02－0037－05
Effect of the Beam Incident Angle of Direct-incident Type Laser Displacement Sensor on Measuring Precision
SONG Teng，ZHANG Fengsheng，REN Jinxia
( College of Mechanical & Electrical Engineering, Qingdao University, Qingdao 266071, China )
Abstract：Directed towards to the problem that the measurement accuracy of laser displacement sensor is affected by its beam incident angle, this paper presents an experimental method to measure relationship between incidence angle and measurement accuracy. The following conclusions are drawn from the experiments: the distance measured by the sensor is smaller than the actual distance, and the difference between the two is increasing with the increase of incident angle α. For the different measured surface, the displacement measurement error is less affected when the angle α is less than certain angle, but once α is larger than this angle, measurement error will significantly increase, or even distorts. Moreover, for the same α, the higher the measured surface finish is, the smaller measurement error is.
Key words：laser displacement sensor；triangulation method；wheel tread measurement
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收稿日期：2016－08－15
作者简介：宋腾（1992－），男，山东济宁人，硕士研究生，主要研究方向为测控技术与智能仪器；张凤生（1962－），男，河北廊坊人，博士，教授，主要研究方向为测控技术与智能仪器、光机电一体化设计；任锦霞（1992－），女，甘肃庆阳人，硕士研究生，主要研究方向为测控技术与智能仪器。
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