光干涉式甲烷传感器具有精度高、测量范围广、稳定性好,可靠性高与标校周期长等诸多优点。研究了光干涉式甲烷传感器有关影响气体折射率的因素,如温度和压强等;阐述了利用压力法对传感器标校的原理,通过试验找出传感器的特性曲线;设计了适用于光干涉甲烷传感器的特性非线性补偿算法,获得良好的实验效果。 Optical interferometric methane sensor with high precision, wide measuring range, good stability, high reliability and the standard calibration cycle and many other advantages. The factors influencing the refractive index of gas are studied, such as temperature and pressure, etc .; the principle of using pressure method to calibrate the sensor is expounded, and the characteristic curve of the sensor is found out through experiments. The optical interferometer methane sensor Non-linear compensation characteristics of the algorithm, access to good experimental results.