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提高CO传感器抗H2干扰能力的研究
Study of Improving H2 Resistibility of CO Sensor
【Author】 LI Xi HE Xiu-li ZHANG Yang LI Jian-ping (State Key Lab.of Transducer Tech.,Inst.of Electronics,Chinese Academy of Sciences,Beijing 100080,China)
【机构】 中国科学院电子学研究所传感技术国家重点实验室；
【摘要】 基于单个商品化 SnO2传感器,研究如何提高 CO 传感器抗 H2干扰能力。利用多种周期性加热电压对传感器进行温度调制,通过实验对比,优选加热电压参数,在所选电压的调制加热下,获得传感器对 CO/H2混合气体的动态响应曲线,利用支持向量机（SVM）估算混合气体中 CO 的浓度,平均估计误差为10．45%。
【Abstract】 Approaches to improve the H2 resistibility of a single commercial SnO2-based CO sen- sor were presented.The sensor working temperature was modulated by various heating voltage waveforms,and the sinusoidal voltage was eventually selected for facilitating the classification of H2 and CO.The dynamic responses were acquired in various concentrations CO/H2 binary mix- tures and then features extracted from the response curves were processed by support vector ma- chines to estimate the concentrations of CO either in CO/H2 mixtures or dry air,and good predic- tion accuracy was obtained.
【Key words】 temperature modulation； support vector machine； metal oxide carbon monoxide sensor； hydrogen resistibility；
- 【会议录名称】 第十届全国敏感元件与传感器学术会议论文集
- 【会议名称】第十届全国敏感元件与传感器学术会议
- 【会议时间】2007-08
- 【会议地点】中国北京
- 【分类号】TP212
- 【主办单位】全国敏感元件与传感器学术团体联合组织委员会