线结构光测量技术研究进展

Research progress of the line structured light measurement technique

线结构光传感器由线激光器和相机组成,通过分析拍摄的调制光条图像获得被测对象的轮廓数据,具有结构简单、成本低、非接触、效率高、使用灵活等优点,在科研和工业生产中具有广泛的应用前景。从光条图像质量控制及中心提取、传感器标定、多个线结构光传感器协同测量、传感器和运动坐标轴结合4个方面对线结构光测量技术进行了综述,概括了目前线结构光测量技术研究和应用中存在的问题,并指出进一步提升测量精度、增强测量的适应性,以及研制基于线结构光传感器的智能测量系统是线结构光测量技术未来的研究方向。

Line structured light sensor(LSLS)is composed of a laser line projector and a camera.The profile data of the measured object can be obtained by analyzing the perturbed stripe images captured by the camera.The sensors have the advantages of simple construction,low cost,non-contact,high efficiency and flexible application.Thus,they have gained extensive application prospects in research and industry.The measuring technique by use of the LSLSs is reviewed in four aspects as quality control of stripe images and center extraction,sensor calibration,collaborative measurement via multiple sensors,and the integration of the sensor with motion axes.The current problems in the research and the application of this measuring technique are summarized,and the future research trends can be concluded as further improving the measuring accuracy,enhancing the sensor adaptability,and developing the structured light sensor based intelligent measuring system.