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Design of Gas Leakage Monitoring System Based on CAN Bus

In view of the natural gas leakage monitoring status, a distributed monitoring system is designed based on CAN bus, which is composed of Master Controller, CAN bus, and data acquisition modules, etc. As well as the circuit diagram and the flow chart of software are introduced in detail. The results indicate that the distributed natural gas leakage monitoring system can fulfill the task of gas leakage state display and alarm successfully in laboratory test, by using distributed structure, the system can be easily expended, and it has the character of reliability and flexibility.