High-speed Train Axle Temperature Monitoring System Based on Switched Ethernet

China railway transportation is developing rapidly, the running speed of high-speed train is promoted. As the promoted speed, the running gear and gearbox of high-speed train produce more heat, causing hot axle easily. In view of the hot axle phenomenon of high-speed train during operating, in combination with the former failure condition of axle temperature monitoring system in terms of total composition, principle and failure condition during operating, analyzing the causes of system failure deeply, a new type of axle temperature monitoring system is designed. Through the test, it indicates that the system could monitor the axle temperature condition of high-speed operating train real-time and accurately, it plays an important role in ensuring the safe operation of high-speed train.