The Research of Bridge Circuit with Constant Temperature Detection of Catalyst Combustion Methane Sensor

The activation of catalyst combustion methane sensor is the key problem in the sensor’s usage.This paper validated the principle of catalyst combustion,analyzed the two-value problem of methane sensor.Aiming at the problems of activation and two-value,it designed a bridge circuit with constant temperature detection based on the impulse constant temperature power supply technology and close-loop feedback control system.It made good effect by experiment.