激光三角法测距传感器结构设计与参数优化的研究

Research on Structural Design and Parameter Optimization of Laser Triangulation Ranging Sensor

文章先通过分析传统的激光三角法结构和原理,进而引入一种反射式激光三角法测量模型,并推导出测距方程表达式,通过数学建模,并借助工程软件Matlab对反射式激光三角法测量模型成像透镜的物距、焦距、激光器光轴与成像透镜光轴的夹角、反射镜(M1)与反射镜(M2)的夹角、反射镜(M2)与线阵CCD传感器的夹角等关键参数对物体位移和分辨率的影响规律进行了定量分析和优化。最后对影响物体位移线性输出的误差进行了分析,并使用线性补偿的方式使物体和像点位移成线性,提升模型的测量线性度与精度。

The article first analyzes the structure and principle of traditional laser triangulation,and then introduces a reflective laser triangulation measurement model,and deduces the expression of the ranging equation. The object distance is measured,focal length of the model imaging lens,the angle between the optical axis of the laser and the optical axis of the imaging lens,the angle between the reflector(M1)and the reflector(M2),and the angle between the reflector(M2)and the linear CCD sensor Quantitative analysis and optimization of the influence laws of key parameters such as object displacement and resolution are carried out.Finally,the error affecting the linear output of the object displacement is analyzed,and the linear compensation method is used to make the displacement of the object and the image point linear,so as to improve the measurement linearity and accuracy of the model.