基于NDIR技术的油气传感器设计

Design of gasoline vapor sensor based on NDIR technology

针对石油化工行业对测量油气浓度的需要,利用油气挥发成分在3.37μm处的基频吸收带,设计了一种非分光红外(NDIR)油气传感器。基于朗伯比尔定律,采用单光源双波长差分测量技术提出了温度补偿模型,提高了油气传感器的精度。实验结果表明:传感器可以精确测量油气浓度,具有精度高、稳定性好等优点。

A non-dispersed infrared(NDIR)gasoline vapor sensor based on the fundamental absorption band at the wavelength 3.37μm of gasoline vapor is designed,aiming at the needs for measuring gasoline vapor content in the field of petrochemical industry.Based on Lambert Beer’s Law,a temperature compensation model is presented by adopting single-source and dual-wavelength differential measurement technique,and precision of gasonline vapor sensors can be improved.The experimental results illustrates that the sensors can measure gasoline vapor concentration,it has advantages of high precision and good stability.