Methane sensor with self-comparison function and measured value redundancy processing method thereof

The invention relates to a methane sensor with a self-comparison function and a measured value redundancy processing method thereof, the methane sensor comprises a sensor mainboard and a plurality of detection modules electrically connected with the sensor mainboard, and the detection modules are electrically connected with the sensor mainboard through TTL signal processing modules. In order to solve the problem that a single detection module adopted by an existing methane sensor is unreliable in data, methane detection modules with different detection principles are comprehensively considered and selected according to factors such as different use environments and costs, and the reliability of the self-comparison methane sensor is improved; and according to the method, based on basic error judgment, algorithm redundancy such as a voting mechanism and median average filtering is adopted, reliable detection data is provided for the methane sensor, faults can be diagnosed in time under abnormal conditions, user