A Method of Flange Size Measurement Based on Laser Displacement Sensor
Aiming at solving the problem of measuring urban rail train flange wear, an online non contact measuring method of flange size based on 2D laser displacement sensor is proposed to timely monitor flange size. First, the definition of the flange height and width for rail vehicle wheels is introduced. Then, a measurement technique of flange size is proposed to describe the tread profile line, including tread data segment, data preprocessing, and coordinate transformation data fusion. The flange size can be calculated by tread geometric relationship. Finally, the field experiments are conducted and the obtained results show that the detection accuracies of flange width and height are 0.2 mm. The stability and reliability of the designed system can meet the actual measurement requirements.