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基于单个麦克风的差异光声谱法用于流气检测

Lujun Fu¹, Jiangshan Zhang², Yufeng Pan¹

¹Wuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.

|June 14, 2024

概括

使用单个麦克风的新型差分光声谱 (PAS) 系统有效地检测出像乙这样的流动气体. 这种简化设置可以抑制噪音,使灵敏和快速的气体分析具有实际应用.

科学领域:

频谱学是一种光谱学.
气体分析气体分析
传感器技术传感器技术

背景情况:

传统的光声谱学 (PAS) 系统与流动气体的噪声作斗争.
现有的方法往往需要复杂的设置,多个传感器.
在动态环境中精确实时检测气体度具有挑战性.

研究的目的:

开发和演示一个简化的差分光声谱学 (PAS) 系统,以有效地检测流气体.
使用单个麦克风设计来抑制流动的气体噪声.
为了在气流中实现对乙 (C2H2) 的敏感和快速检测.

主要方法:

使用单个麦克风实现差异光声谱学 (PAS).
波长调制光谱的应用与第二波检测和Q点调制.
使用不同度和不同流速的乙 (C2H2) 与 (N2) 作为载体气体在 1 atm 和 300 K 时进行实验验证.

主要成果:

单个麦克风差异PAS系统成功检测到乙烯 (C2H2) 在高达225平方米的流速下,同时保持低噪音水平.
在气体速度为225scm时,系统响应时间为3.58s.
证明检测极限为43.97ppb,整合时间为1秒,NNEA系数为4.0 × 10^-9 cm^-1 Hz^-1/2.

结论:

拟议的单麦克风差分PAS系统大大简化了流气检测仪器.
这种方法为开发用于实时气体监测的先进PAS系统提供了一种新且实用的方法.
这项技术对各种需要灵敏检测移动气体的应用具有前景.

关键词:

在C2H2的基础上.差分光谱法是指差分光谱法.气流检测器检测气体的流量在线检测检测在线检测摄影声学光谱学摄影声学光谱学一个单个麦克风的麦克风.

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