为了降低激光位移传感器的生产成本, 提出一套新型激光位移传感器系统的设计方法。该设计基于三角测距原理, 使用CCD 单板机作为光电探测器, 换用小孔光学系统替代透镜, 并针对小孔光学系统的特点对传感器系统重要参数的确定方法进行了研究, 编写图像处理算法提取目标图像中的位移信息, 从而达到非接触式位移测量目的。搭建了一套该新型激光位移传感器系统进行位移测量实验, 结果表明此系统可以达到量程为50 mm、精度为1 mm 的测量需求。

In order to reduce the production cost of laser displacement sensor, we put forward a design method of a new type of laser displacement sensor system. Based on the triangle measurement principle, the design uses the CCD single board computer as the photoelectric detector, utilizes the pinhole optical system to replace lens. We discussed the method to determine the important parameters of the senor system according to the characteristics of the pinhole optical system, and wrote the image processing algorithm for extracting displacement information of the target image, so as to achieve non-contact displacement measurement. Finally, we set up a set of this new type of experimental system of laser displacement sensor to carry on displacement measurement experiment, and the results show that this system can meet the measurement requirements of 50 mm range and 1 m precision.