Valve inner leakage monitoring system and method based on vibration measurement technology

The invention discloses a valve inner leakage monitoring system and method based on a vibration measurement technology. The system comprises a pipeline vibration sensor, valve vibration sensors and a microprocessor; the pipeline vibration sensor is arranged on a branch mounted on a thermotechnical main system or in the upstream and/or downstream position of an isolation valve mounted in the thermotechnical main system; the valve vibration sensors are arranged on a valve rod and a valve body of the isolation valve; the pipeline vibration sensor and the valve vibration sensors upload detected vibration signals to the microprocessor for processing, and the inner leakage condition of the isolation valve is monitored. According to the system and the method, the vibration sensors are adopted to measure the vibration characteristics of the valve rod and the valve body of the moving part of the valve, the front-end microprocessor is combined, the typical vibration characteristics after complete truncation are input,