Accelerated test of working stability of mine-used laser methane sensor

In view of problem that existing sensor working stability test method requires continuous operation and testing of sensor for 180 days with low efficiency, feasibility of accelerated test of working stability of mine-used laser methane sensor is analyzed;it is found out by thorough test that temperature is the main factor affecting long-term measurement error stability of laser methane sensor; accelerated test temperature was determined to be 75 ℃ according to temperature limits of laser methane sensor components and the whole machine; the Arrhenius equation is used to establish an accelerated test model of work stability, and acceleration factor is calculated to be 8.718 34; combining verification test scheme of failure rate and the mean time between failures under the assumption of constant failure rate, an accelerated test method for working stability of laser methane sensor is obtained, which can shorten the test time from 180 d to 12 d. The feasibility of the accelerated test method is verified by experiments in combination with the test results of third-party testing agencies. The proposed accelerated test method can greatly improve the efficiency of inspection work and provide theoretical support for the development of industry standard test methods for laser methane sensor.