A study on the development of the logic to evaluate odor for electronic nose

The Problem of unpleasant smell from air conditioners (A/C) in used cars stemming from evaporator is hard to tackle because there have been not to exactly evaluate the kinds of the odors and the intensity of the odor. And also the odor componets can be harmful to the human body. The objective of this study was to evaluate the odor consistently and accurately using the electronic nose. First it needs to make an electronic nose consisting of 17 sensors. Each sensor can detect a specific odor components. There are 4 groups of 17 sensors. The groups are PID sensors, Electro-Chemical sensors, Semi-Conductor sensors and IR sensors. And the feeling of odors were greatly affected by the temperature and the humidity. So the temperature and humidity sensor were added in the electronic nose sensor array. In this study an analysis of the odors of the components been carried out using about 200 used cars and 400 new cars in field. In order to evaluate the odors it need to collect the data of outputs of sensors. According to collecting datum it can be made the odors database. And then the analysis of the database shows the classification of the groups of odors. Each odor group can mean the defferent feeling of odor. On the basis of this procedures finaly it can distinguish the odors of feeling. This study shows the electronic nose device and the method of the classification of the odor database.