Development of a preconcentration unit for a SAW sensor micro array and its use for indoor air quality monitoring
Development of a preconcentration unit for a SAW sensor micro array and its use for indoor air quality monitoring
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DOI：
10.1016/s0925-4005(03)00239-9
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发表时间：
2003-08-01
影响因子：
8.4
通讯作者：
Rapp, A
中科院分区：
文献类型：
--
作者：
Bender, F;Barié, N;Rapp, A
研制了一种用于空气质量连续监测的表面声波传感器系统。该系统采用了由8个聚合物涂层SAW传感器组成的小型化阵列、一个预浓缩单元（“陷阱”）和模式识别方法。注意最小化传感器的响应时间和传感器阵列的气体体积。因此，可以使用热容量低的小型疏水阀，从而实现低功耗和快速热解吸。通过在低ppm和亚ppm范围内成功识别密切相关的芳香族化合物（BTXE），证明了该系统的能力。设计方面的考虑特别强调了传感器、涂层、疏水阀、气体流体和模式识别软件之间相互作用所产生的必要性。(C) 2003 Elsevier Science B.V.版权所有
A new surface acoustic wave (SAW) sensor system for continuous monitoring of air quality was developed. The system employs a miniaturized array of eight polymer coated SAW sensors, a preconcentration unit ('trap'), and methods of pattern recognition. Care was taken to minimize both the response times of the sensors and the gas volume of the sensor array. Thus, a small trap with low heat capacity can be used, resulting in low power consumption and rapid thermal desorption. The capabilities of the system are demonstrated by successful discrimination of closely related aromatic compounds (BTXE) in the low- and sub-ppm ranges. Design considerations are made with particular emphasis on the necessities arising from the interplay between sensors, coatings, trap, gas fluidics, and pattern recognition software. (C) 2003 Elsevier Science B.V. All rights reserved.