Development of compact electronic noses: a review

电子鼻 计算机科学 微处理器 计算机硬件 可穿戴计算机 超大规模集成 嵌入式系统 人工智能
作者
Cheng Liu,Qing-Hao Meng,Achim J. Lilienthal,Qi Pan
出处
期刊:Measurement Science and Technology [IOP Publishing]
卷期号:32 (6): 062002-062002 被引量:54
标识
DOI:10.1088/1361-6501/abef3b
摘要

Abstract An electronic nose (e-nose) is a measuring instrument that mimics human olfaction and outputs ‘fingerprint’ information of mixed gases or odors. Generally speaking, an e-nose is mainly composed of two parts: a gas sensing system (gas sensor arrays, gas transmission paths) and an information processing system (microprocessor and related hardware, pattern recognition algorithms). It has been more than 30 years since the e-nose concept was introduced in the 1980s. Since then, e-noses have evolved from being large in size, expensive, and power-hungry instruments to portable, low cost devices with low power consumption. This paper reviews the development of compact e-nose design and calculation over the last few decades, and discusses possible future trends. Regarding the compact e-nose design, which is related to its size and weight, this paper mainly summarizes the development of sensor array design, hardware circuit design, gas path (i.e. the path through which the mixed gases to be measured flow inside the e-nose system) and sampling design, as well as portable design. For the compact e-nose calculation, which is directly related to its rapidity of detection, this review focuses on the development of on-chip calculation and wireless computing. The future trends of compact e-noses include the integration with the internet of things, wearable e-noses, and mobile e-nose systems.
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