Design and Application of Ultrasonic Guided Wave Rail Fracture Monitoring System
To monitor rail health in real-time and provide early warning of rail fracture damage,this study proposes a broken rail detection method that combines ultrasonic guided wave detection and variational mode decomposition signal processing technologies.The system workflow and hardware circuits of each module were designed and constructed according to the requirements for rail fracture detection.A three-dimensional rail model was created using finite element simulation software to analyze the propagation speed of ultrasonic guided waves within the rail and assess the feasibility of the noise reduction technique.The system's effectiveness was verified through equipment installation tests on Suzhou Metro Line 5,where artificially simulated rail fractures were used.The results demonstrated that,upon rail fracture,the system achieved a remote alarm time of 3 minutes and the defective positioning error is 1.1％,providing a reliable approach for rail fracture monitoring.
NETL
NSTL
万方数据
