| 气压变化对极限电流型氧传感器输出特性的影响 |
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| 引用本文： | 简家文,王金霞,沈杰,章东兴.气压变化对极限电流型氧传感器输出特性的影响[J].传感技术学报,2010,23(2):175-178. |
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| 作者姓名： | 简家文 王金霞 沈杰 章东兴 |
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| 作者单位： | 宁波大学信息科学与工程学院,浙江宁波,315211;宁波工程学院电子与信息工程学院,浙江宁波,315016 |
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| 基金项目： | 国家自然科学基金资助(60971074);;浙江省自然科学基金资助(Y1080430);;宁波市自然科学基金资助(2009A610065) |
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| 摘 要： | 对气压变化对极限电流型氧传感器扩散机理的影响进行了研究。实验中将扩散孔径为30μm的极限电流型氧传感器先后放置在不同气压环境中进行了电学性能测试。实验结果显示:在常压下该氧传感器的极限电流IL与氧浓度的对数表达式ln(1-XO2)具有很好的线性关系,呈现正常扩散模型的特征。但在低气压环境下,该传感器的极限电流IL受气压P的影响,并呈现Knudsen模型的某些特征。
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| 关 键 词： | 氧传感器 极限电流 正常扩散和尼德森扩散机理 低气压 |
The effect on output of limiting current oxygen sensor with the variation of total gas pressure |
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| JIAN Jiawen,WANG Jinxia,SHEN Jie,ZHANG Dongxin.The effect on output of limiting current oxygen sensor with the variation of total gas pressure[J].Journal of Transduction Technology,2010,23(2):175-178. |
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| Authors: | JIAN Jiawen WANG Jinxia SHEN Jie ZHANG Dongxin |
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| Affiliation: | 1.Department of Information Science & Engineering;Ningbo University;Ningbo Zhejiang 315211;China;2.Department of Information Science & Engineering;Ningbo University of Technology;Ningbo Zhejiang 315016;China |
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| Abstract: | In this article the gas diffusion mechanisms of the limiting current oxygen sensors was studied. For a limiting current oxygen sensor in which the pore diameter d is about 30μm, the diffusion of the limiting current Ⅰ_L was quite linear with ln(1 -Xo_2) rather than Xo_2 at 1 atm gas pressure, it showed the normal mechanism was more dominant than the Knudsen one. However at the low gas pressure , the limiting current Ⅰ_L was changed with the variation of total gas pressure P. This reveals the gas diffusion mechanisms belong to some Characteristics of the Knudsen diffusion . |
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| Keywords: | oxygen sensor limiting current the normal and Knudsen diffusion mechanisms low gas pressure |
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