| With the rapid development of China’s economy, the transportation industry has been an unprecedented development, and the railway transport industry is developing rapidly in recent years. Train wheel set is a very important part in the vehicles running gear and plays a key role on the safe railway transport.The traditional method of train wheel set detection is carried out manually. This method results in not only labor-intensive and inefficient, but also be prone to the phenomenon of missed and drain repair. This buries a significant risk for the safe operation of the train. Studying the wheel set geometry inspection system can achieve the online measurement of the wheel set geometry train walking. The system not only improves the work efficiency, satisfy the need of railway rapid development in our country, but also improves the economic benefits of railway transportation to some extent.This paper studies the wheel set geometry inspection system. It analyzes some deficiencies existing in current measurement methods, and combining with China’s actual situation it designs a method to measure geometry online by using a laser displacement sensor. The wheel diameter, rim thickness, wheel back distance and rim width can be measured. The paper uses three laser displacement sensors when measuring the wheel set diameter. By this way the measurement accuracy can be improved, and the emission angle and height are designed optimizably, as well as the installation distance of laser displacement sensors, analyzing of the entire measurement system mistake. This paper studies the calibration method of the laser sensor measurement noise, wheel diameter calibration method and the rim of wheel on the inside rim width, thickness and distance of calibration method. The author selects the appropriate sensor on-site installation and completes the field test on-line measurement. The results are analyzed and verified the feasibility of this measurement system. |
