An intelligent fuel sensor based on a microstructured gas sensor

Proceedings of IEEE Sensors 2003 (IEEE Cat. No.03CH37498) Pub Date : 2003-10-22 DOI:10.1109/ICSENS.2003.1279106

T. Kammerer, M. Engel, A. Schutze

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引用次数: 5

Abstract

Temperature cycling of semiconductor gas sensors is a very powerful tool for developing gas detection systems with high selectivity and stability. Microstructured gas sensors - due to their low thermal mass - have very low thermal time constants in the range of 10 ms. Based on these sensors, development of fast and highly selective gas detection systems is possible using temperature cycles spanning the whole operating temperature range with ten or more levels with an overall duration of only a few seconds. I or efficient evaluation of these systems, we have developed a versatile hardware platform which provides accurate control for arbitrary temperature cycles and fast, high resolution data acquisition either in stand-alone operation or connected to a PC Based on this platform, we demonstrate a system for fast discrimination between gasoline and diesel vapors based on a single microsensor and intelligent signal processing. The system is not only able to discriminate steady state conditions but also to correctly classify the transient behavior immediately after exposing the sensor to fuel vapor or ambient air. Integrated in pump nozzles at filling stations the system would allow to prevent the car tank from being filled with the wrong fuel by detecting the type of fuel inside the tank in seconds. For this application micro pellistors are also suitable, which have shown superior stability compared to semiconductor gas sensors.

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一种基于微结构气体传感器的智能燃料传感器

半导体气体传感器的温度循环是开发高选择性、高稳定性气体检测系统的有力工具。微结构气体传感器-由于其低热质量-具有非常低的热时间常数，在10毫秒范围内。基于这些传感器，开发快速和高选择性的气体检测系统成为可能，使用跨越整个工作温度范围的温度循环，具有十个或更多的水平，总持续时间仅为几秒钟。为了对这些系统进行有效的评估，我们开发了一个通用的硬件平台，可以在独立操作或连接到PC时提供任意温度循环的精确控制和快速，高分辨率的数据采集。基于这个平台，我们展示了一个基于单个微传感器和智能信号处理的快速区分汽油和柴油蒸汽的系统。该系统不仅能够识别稳态条件，而且在将传感器暴露于燃料蒸气或环境空气后立即正确分类瞬态行为。该系统集成在加油站的油泵喷嘴中，通过在几秒钟内检测油箱内的燃料类型，可以防止汽车油箱被加错燃料。对于这种应用，微瓶也很合适，与半导体气体传感器相比，它具有优越的稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of IEEE Sensors 2003 (IEEE Cat. No.03CH37498)

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