Research on the Detecting System of High-speed Railway Wheel Defect based on Laser Method

摘要

The wheel-set is a key part of the China railway high-speed (CRH), and its quality will directly affect the safety of CRH. Nowadays, there is no good way to accurately measure the quality condition of wheel especially when the train is on the running. The principle to calculate wheel-rail force by detecting the bending of steel rail is introduced. To calculate wheel-rail force, a system module of 'Laser-PSD' is presented. Based on the detecting displacement of light spot on PSD, the bending of steel rail can be calculated. The abrupt change in the curves is found to be the performance of the wheel which has a defect. The system has an enlightening function to raise the detection accuracy in the quality of railway wheel-set especially in high speed of 60-400km/h.