Study On The Detected Technology Of Two-Dimensional Photoelectric Displacement

At present, the increasing railway transportation task make the train wheel wear severely. It increases the amount of maintenance. Because the traditional manual testing is slow and has high error rate, so it is difficult to adapt to the development of railway transportation. On this basis, this paper designs a high-speed, accurate detection system. The detection system will have broad application prospects.At first, we compare and analyze the existing measurement methods. And we choose a simple structure, high precision method that is measurement of optical triangulation. We also use the area array CCD as the receiving device to improve the system accuracy, which can achieve two-dimensional detection. On this basis, the paper gives a detailed description about the principle of optical triangulation method, and expounds the working principle and circuit of each the area array CCD driving module. In the laboratory simulated environment, we measure the gauge block and analyze measurement results. Experimental data show that each module of the system meets design requirements, stable and reliable. Measuring range:width range,0～145mm; thickness range,-2～12mm, repeatability of±0.1mm.It can meet the design requirements.