Innovative Design Of Rapid Detection Based On Artificial Olfactory Of Sesame Oil Extract

In modern life, food security is increasingly becoming the focus of people’s attention,but its situation allows no optimism. As one aspect, the quality and safety of edible vegetableoils are equally worrisome. Doping additive to the oil is a prevalent practice in the industry,among which sesame oil extract is one of the commonly used additives, but long-termconsumption of sesame oil extract will do serious harm to the body. Traditional detectionmethods still can not be the quick resolution. The development of sensor technology has madedetecting the smell with the sensors of a reality, and artificial sense of smell-the electronicnose system came into being. In view of the rich flavor of the sesame oil extract, the use ofelectronic nose technology can achieve the rapid detection of sesame oil extract. This articledesigns an electronic nose specifically for the detection of sesame oil extract for an accurateand rapid detection.The complete electronic nose system is composed of gas sensor arrays and signalacquisition and pattern recognition system. This article is committed to the research of gassensor array and development of corresponding signal acquisition device, to make theinstrument capable of capturing the dynamic response data of the gas sensor and completingsimple image analysis and data storage tasks, which will provide reliable and valid data forthe subsequent pattern recognition system.The research mainly includes:1)Designing the signal conditioning circuit, combined with sophisticatedsignal-processing technology and relative sensor characteristics, which provides thepreconditions for effective sensor signal；2) Designing the gas sensor array specifically for the sesame oil extract: on the basis of alot of comparative experiments on the sample of sesame oil extract, the suitable gas sensorsare chosen to build a sensor array, which are the ’sense of smell cells’ for electronic nose in apractical sense； 3) Designing MSP430F149-based data acquisition hardware. In the analog to digitalconversion part, A/D—part of the MSP430, instead of expensive data acquisition card, isdirectly used for conversion, which provides a hardware basis for the continuous developmentof electronic nose system；4) Designing the controlling software of the host computer of the electronic nose,LabVIEW development platform is used for data storage, display and control functions,providing a virtual control panel for the electronic nose.Going through the pre-data collection task, the electronic nose designed in this article,can easily distinguish the mixture liquid with0.5%of sesame oil extract through graphicsjudgment, and provides an accurate data foundation for the subsequent identification ofingredients of sesame oil extract.