文档介绍：摘要
电子鼻系统是对人类等哺乳动物嗅觉系统的模拟,根据气味来识别物质的类
别和分类,具有样品处理简单、识别效果好、检测速度快、无损等优点。随着电
子鼻技术的发展,电子鼻已经广泛应用于烟草、食品、医学、环境监测和安保等
领域。
然而,市场上出现的商品化电子鼻一般基于PC机实现,体积和功耗都较大,无法满足现场工况的实时测试要求。本课题研究开发基于嵌入式系统的电子鼻系统,力图解决市场上电子鼻系统体积大、,设计开发了系统:基于嵌入式平板电脑的台式电子鼻系统。
本文首先介绍了传感器阵列的设计,传感器阵列的设计主要包括气敏传感器

感器个数检测最多的气体种类,能够减少数据信息的冗余度,降低系统的成本。
其次介绍了基于嵌入式平板电脑的台式电子鼻设计,台式电子鼻系统由3
块基于MSP430F169的测控电路和嵌入式平板电脑组成。3块测控电路分别完成
8路半导体气敏传感器、3路电化学传感器、1路PID传感器、1路二氧化碳传
感器、1路氧气传感器和4路温湿度传感器信号的采集与处理,以及气体流路中
,实现控制命令和
传感器数据的传输。
本文对开发的系统进行了应用实验测试。使用系统对猪肉等农产品的新鲜度做了测试,通过观察实验现象,所开发的系统满足设计目标。
关键词:电子鼻,气体传感器阵列,嵌入式系统,MSP430

ABSTRACT
Electronic nose is the simulation of human and other mammalian olfactory system , identifying and assorting the substances according to the type of smell .It has the advantages of easy sample handling, effective identification, quick detection, non-destructive and so on. With the development of electronic nose technology, it has been widely used in the fields such as o, food, medicine, environmental monitoring, security and so on.
However, mercial electronic nose appeared on the market is often to work based on PC .The large size and high power consumption can not meet the real-time test requirements of mining site. This research developed the electronic nose system based on embedded system, trying to resolve the shortage of e-nose system's large size and high power consumption. We design two kinds of systems for different applications: electronic nose system on desk based on embedded systems.
Firstly, this paper describes the design of the sensor array, which includes the selection of gas sensor and calibration of some sensors. Selecting appropriate sensors pose the sensor array can detect the most gas types with the least sensors, also it can reduce data redundancy and the cost of system.
Secondly, the article introduces the design of electronic nose on desk based on embedded systems. This kind of electron