Accelerated test of working stability of mine-used laser methane sensor
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摘要: 针对现有传感器工作稳定性试验方法需将传感器连续运行和测试180 d、效率较低的问题，分析了矿用激光甲烷传感器工作稳定性加速试验的可行性；通过摸底试验分析得出温度是影响激光甲烷传感器长期测量误差稳定性的主要因素；根据激光甲烷传感器各部件及整机的温度极限，确定加速试验温度为75 ℃；使用阿列纽斯方程建立工作稳定性加速试验模型，并计算出加速因子为8.718 34；结合恒定失效率假设下失效率与平均无故障时间的验证试验方案，得出激光甲烷传感器工作稳定性加速试验方法，该方法可将试验时间从180 d缩短为12 d。结合第三方检测机构的检测结果，通过实验验证了加速试验方法的可行性。该加速试验方法可大幅提升检验工作效率，为制定激光甲烷传感器行业标准试验方法提供理论支撑。Abstract: 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.
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