红外光学气体检测中的参数修正函数浓度计算与补偿方法  

Parameters correction function method for concentration calculation and compensation in IR optical gas measurement

作　　者：谭秋林[1] 杨明亮[1,2] 熊继军[1,2] 薛晨阳[1] 刘俊[1] 张文栋[1,2] 

机构地区：[1]中北大学电子测试技术重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《红外与激光工程》2014年第5期1396-1400,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(51205373);山西省自然科学基金(2012021013-4);国家自然基金重点项目(61335008);高等学校优秀青年学术带头人支持计划(2013)

摘　　要：从红外光谱吸收理论出发,提出了一种高精度的红外光学气体传感器气体浓度信号处理方法。重点阐述了气体浓度计算模型的建立和各参数的实验确定方法。从气体浓度计算的原理分析入手,通过逐步修正郎伯-比尔定律得到了一个有效的气体浓度函数关系式,供计算气体浓度用。为了减少外界温度对传感器检测结果的影响,实施了温度补偿,使得传感器能在不同温度条件下使用。经测试,传感器达到了100×10-6的分辨能力,具有良好的稳定性,能够满足许多场合的使用。From the basic principle of infrared spectrum absorption method, the high-precision gas concentration signal processing calculation method of the IR optical sensor was presented. This paper focused on the establishment of the gas concentration calculation model and experimental method for determining the various parameters. From the analysis of the principle of gas concentration calculation method, a new formula for gas detection was obtained by gradually modifying the Lambert-Beer law. The formula can be used to calculate gas concentration. To reduce the environmental temperature influence on the detection results of infrared gas concentration, temperature compensation was required. Through temperature compensation, the sensor can be used in various temperature conditions. After measurement, the sensor has good stability and realizes the 100í10-6 distinguishing ability. It meets most occasions use requirement.

关 键 词：气体传感器 浓度 温度补偿 参数修正 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]