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Sensors are widely used in the field of rail transit, playing important roles in various aspects including but not limited to safety monitoring, equipment health status detection, autonomous driving assistance, etc. The application of sensors in rail transit not only improves the safety and operational efficiency of the system, but also provides passengers with a safer and more comfortable travel experience. With the continuous advancement of technology, the application of sensors will become more extensive and in-depth, providing strong technical support for the development of the rail transit industry.