Remote fault monitoring system for electric valve

A remote fault monitoring system for an electric valve, comprising:

• an MCU (Microcontroller Unit), a hydrogen sulfide sensor, a hydrogen sensor, a pull-press sensor and an actuating mechanism;
• wherein the pull-press sensor is connected with an A/D (Analog-to-Digital) conversion interface of the MCU by a signal amplifier, the hydrogen sulfide sensor and the hydrogen sensor are connected with the A/D conversion interface of the MCU by respective signal transmitters, and a D/A (Digital-to-Analog) conversion interface of the MCU is connected with an opening-degree control port of the actuating mechanism by a voltage-to-current transmitter;
• and
• wherein in the system, an interrupt service program for a valve opening-closing time is executed after an interrupt source is triggered, and the interrupt service program comprises interrupt source signal verification and valve opening-closing time counting functions;
• in the interrupt source signal verification, the system firstly judges a current interrupt triggering way, and meanwhile, the system filters abnormal voltage increases or decreases of the valve during rotation using 20 ms anti-shake verification;
• in the valve opening-closing time counting, the system performs time calculation by judging a time difference between a time stamp of interrupt starting and a time stamp after anti-shake verification, and the system filters interrupt signals which are repeatedly triggered within five seconds.