Advances in a developed surface acoustic wave based particulate matter 2.5 monitor

Wenchang Hao, Z. Nie, Jiuling Liu, Minghua Liu, S. He
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引用次数: 4

Abstract

This paper presented a surface acoustic wave (SAW) based particulate matter (PM) 2.5 monitor, which consisted of a SAW dual-resonator oscillator, a thermophoresis unit and a virtual impactor. The structure optimization for improving the performance of the sensor by considering the particle distribution deposited by thermophoresis on the SAW detector was analyzed and verified in experiments. The size of thermophoresis micro-channel was obtained by Talbot formula and the movement of particles to the surface of the SAW detector was simulated by using the finite element method (FEM). Based on the theoretical results, the micro-channel was fabricated and the thermophoresis distribution was observed under an optical microscope. The optimal monsitoring structure of the SAW based PM2.5 monitor was established theoretically.
基于表面声波的颗粒物2.5监测仪的研制进展
提出了一种基于表面声波(SAW)的pm2.5监测仪,该监测仪由SAW双谐振振荡器、热泳器和虚拟冲击器组成。分析并验证了考虑热泳沉积颗粒分布在声表面波探测器上的结构优化,以提高传感器的性能。利用Talbot公式计算了热泳微通道的尺寸,并利用有限元法模拟了粒子在声表面波探测器表面的运动。在此基础上,制备了微通道,并在光学显微镜下观察了热泳运动的分布。从理论上建立了基于SAW的PM2.5监测仪的最优监测结构。
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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