金属氧化物气体传感器的非线性处理方法  

A Nonlinear Processing Method of Metal Oxide Gas Sensors

作　　者：傅中君[1] 周根元[1] 陈鉴富[1] 

机构地区：[1]江苏理工学院,江苏常州213001

出　　处：《传感技术学报》2013年第9期1188-1192,共5页Chinese Journal of Sensors and Actuators

基　　金：常州市科技计划项目(CC20130029)

摘　　要：金属氧化物气体传感器的气敏特性为非线性,难以用于气体组分定量测量。本文在分析该类传感器气敏特性的基础上,提出了一种非线性处理方法。该方法先采用数据预处理技术来解决测量电路的非线性,然后根据其在双对数域中存在线性或近似线性关系的原理通过三点标定进行非线性修正。验证实验证明该方法可以解决该类传感器的非线性问题,获得较高精度的测量结果。The sensitivity characteristics of metal oxide gas sensors is nonlinear, that makes it difficult for the gas concentration measuring. Based on the analysis of the characteristics of such sensors, a nonlinear processing method is proposed. The method first solve the nonlinear of measurement circuit by data preprocessing technology. Then, based on the sensitivity principles of linear or nearly linear relationship in the double logarithmic domain, a nonlinear correction method using three-point calibration is given. The experiments show that this method can solve the nonlinear problem of such sensors, and improve the measurement accuracy.

关 键 词：气体传感器 金属氧化物 气敏特性 非线性处理 标定 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]