【摘要】 采用德国 Jenasensoric e.V研制的电子鼻和自行设计的实验系统 ,分别以纯净空气及乙醇或葡萄酒作为载气及分析样本 ,对电子鼻系统动态响应特性与酒类样本、样本温度、环境湿度、样本浓度间的依赖关系进行了实验分析 ,并分别给出了它们间依赖关系的实验结果更多还原

【Abstract】 In actual applications, the static response of an electronic nose is usually used as analytical information, with its dynamic response often neglected. Much more accurate qualitative and quantitative identification of gas/odor can be expected if both static and dynamic responses of an electronic nose are used in gas analysis. In this paper, we analyze experimentally the effects of sample, sample concentration, sample temperature, humidity of environment respectively on dynamic response of an electronic nose. The electronic nose system in the experimental system we used was “Multigassensors Electronic Board” developed by Jenasensoric e.V, a German firm; they were described in Ref.3. Section 2 gives experimental results and their analyses. We used pure and dry air as carrier air. Subsection 2.1 deals with effect of different samples on the dynamic response of the electronic nose system we used; the six different samples used were 10% ethanol and five different kinds of wine; Fig.1 shows the sample dependent dynamic response characteristic curves. Subsection 2.2 deals with the effect of different sample concentrations on the dynamic response of the electronic nose system we used; the seven different concentrations of ethanol used were 5%, 10%, 20%, 30%, 50%, 60%, and 80%; Fig.2 shows the concentration dependent dynamic response characteristic curves. Subsection 2.3 deals with the effect of different sample temperatures on the dynamic response of the electronic nose system we used; the seven different temperatures used were 40℃, 50℃, 60℃, 70℃, 80℃, 90℃, and 100℃; Fig.3 shows the temperature dependent dynamic response characteristic curves. Subsection 2.4 deals with the effect of different environmental humidities on the dynamic response of the electronic nose system we used; humidity is expressed by the amount of pure water evaporated; the five different amounts of pure water evaporated were 1μl, 2μl, 3μl, 4μl, and 5μl; Fig.4 shows the humidity dependent dynamic response characteristic curves. Preliminary conclusions are as follows: (1) the response time of gas sensors array is usually shorter than its restoration time; (2) response difference is not only caused by different ethanol concentrations but also caused by different sample components; (3) dynamic response characteristics are not uniform in different phases of the response; this nonuniformity can be used to acquire much more information in gas analysis.更多还原