利用紫外光共振光声气体检测对 SO 船舶排放物进行船上监测。

On-Board Monitoring of SO Ship Emissions Using Resonant Photoacoustic Gas Detection in the UV Range.

机构信息

Fraunhofer Institute for Physical Measurement Techniques IPM, 79110 Freiburg, Germany.

Department of Microsystems Engineering-IMTEK, University of Freiburg, 79110 Freiburg, Germany.

出版信息

Sensors (Basel). 2021 Jun 29;21(13):4468. doi: 10.3390/s21134468.

DOI:10.3390/s21134468

PMID:34210063

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8271390/

Abstract

A photoacoustic gas detector for SO was developed for ship exhaust gas emission monitoring. The basic measurement setup is based on the absorption of electromagnetic radiation of SO at 285 nm wavelength. A commercially available ultraviolet (UV) light-emitting diode (LED) is used as the light source and a micro-electro-mechanical system (MEMS) microphone as the detector. In order to achieve the required detection limits in marine applications, a measuring cell which allows an acoustically resonant amplification of the photoacoustic signal was developed and characterized. A limit of detection of 1 ppm was achieved in lab conditions during continuous gas flow. Long-term measurements on a container ship demonstrated the application relevance of the developed system.

摘要

为了监测船舶废气排放，开发了一种用于测量 SO 的光声气体探测器。基本测量设置基于 SO 在 285nm 波长处的电磁辐射吸收。商用紫外（UV）发光二极管（LED）用作光源，微机电系统（MEMS）麦克风用作探测器。为了在海洋应用中达到所需的检测极限，开发并表征了一种测量池，该测量池允许光声信号的声学共振放大。在连续气流的实验室条件下，达到了 1ppm 的检测极限。在集装箱船上进行的长期测量证明了所开发系统的应用相关性。