Design, Implementation, and Field Testing of a Portable Fluorescence- Based Vapor Sensor
Design, Implementation, and Field Testing of a Portable Fluorescence- Based Vapor Sensor
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DOI：
10.1021/ac900505p
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发表时间：
2009-07-01
影响因子：
7.4
通讯作者：
Walt, David R.
中科院分区：
文献类型：
--
作者：
Aernecke, Matthew J.;Guo, Jian;Walt, David R.
介绍了一种便携式荧光蒸汽传感系统的设计与实现。该系统将以前开发的微传感器阵列技术集成到一个紧凑的，低功耗的设备，能够收集和提供周围的蒸汽样品的阵列，同时监测和记录传感器的荧光响应。当暴露于样品蒸气时，传感器的响应不同，并且当使用支持向量机（SVM）模式识别算法处理时，示出区分三类石油馏分。该系统的特点是使用在几个不同的条件下制备的样品蒸气在三个传感方案。第一种方案通过向阵列提供高浓度蒸气来展示该装置在现场的基本操作能力。第二种情况介绍了一个更大程度的样品蒸汽浓度和成分的变化，在努力模仿现实世界的传感条件的潜力。第三种情况使用机载训练模式识别算法来识别未知的蒸汽，因为它们的响应被收集。该设备在整个现场测试中表现出很高的分类精度，并且能够通过提高阵列响应的信噪比来提高其在可变环境条件下呈现的样本的分类精度。
The design and implementation of a portable fluorescence-based vapor sensing system are described. The system incorporates previously developed microsensor array technology into a compact, low-power device capable of collecting and delivering ambient vapor samples to the array while monitoring and recording the fluorescent responses of the sensors. The sensors respond differentially when exposed to a sample vapor and, when processed using a support vector machine (SVM) pattern recognition algorithm, are shown to discriminate between three classes of petroleum distillates. The system was characterized using sample vapors prepared under several different conditions in three sensing scenarios. The first scenario demonstrates the basic operational capability of the device in the field by presenting high concentration vapors to the array. The second scenario introduces the potential for a greater degree of variability in both sample vapor concentration and composition in an effort to emulate real-world sensing conditions. The third scenario uses an on-board trained pattern recognition algorithm to identify unknown vapors as their responses are collected. The device demonstrated high classification accuracy throughout the field tests and is capable of improving its classification accuracy when challenged with samples presented under variable ambient conditions by enhancing the signal-to-noise ratio of the array response.