Study on Vibration Monitoring of Railway Seamless Line

With the continuous expansion of the scale of high-speed rail network in China, in order to improve the speed, train load and safety performance, seamless rail technology is widely used in Chinese lines. And seamless rail is to weld 25 meters long rail into several hundred meters long or even thousands of meters long. Because highspeed rail cannot freely expand and contract, the rail is affected by temperature stress, vibration stress, at the same time high speed starting and braking of high speed railway, Large volume of transport is easy to make the rail fatigue and fracture. In order to ensure the safety of people's life and property, in this study, a new real-time monitoring method for rail condition is proposed., using the rail vibration signal analysis of rail damage, through acceleration sensor to collect the rail. vibration signal, then reduce the interference through kalman filter, get the rail close to the real vibration amplitude. under laboratory conditions, build vibration signal test system, use bench drill hammer rail model, use MPU6050 acceleration sensor to collect vibration signal of rail model, pass STM32F103CBT6 to computer keil program, and import the result into MATLAB for filtering and amplitude analysis. The experiment shows that the acceleration sensor is effective in monitoring the amplitude of rail.