Wijesinghe Dakshith Ruvin, Zobair Md Abu, Esmaeelpour Mina
Mining and Explosive Engineering Department, Missouri University of Science and Technology, Rolla, MO 65401, USA.
Electrical and Computer Engineering Department, Missouri University of Science and Technology, Rolla, MO 65401, USA.
Sensors (Basel). 2024 Oct 12;24(20):6577. doi: 10.3390/s24206577.
The rapid growth of industry and the global drive for modernization have led to an increase in gas emissions, which present significant environmental and health risks. As a result, there is a growing need for precise and sensitive gas-monitoring technologies. This review delves into the progress made regarding photoacoustic gas sensors, with a specific focus on the vital components of acoustic cells and acoustic detectors. This review highlights photoacoustic spectroscopy (PAS) as an optical detection technique, lauding its high sensitivity, selectivity, and capability to detect a wide range of gaseous species. The principles of photoacoustic gas sensors are outlined, emphasizing the use of modulated light absorption to generate heat and subsequently detect gas pressure as acoustic pressure. Additionally, this review provides an overview of recent advancements in photoacoustic gas sensor components while also discussing the applications, challenges, and limitations of these sensors. It also includes a comparative analysis of photoacoustic gas sensors and other types of gas sensors, along with potential future research directions and opportunities. The main aim of this review is to advance the understanding and development of photoacoustic gas detection technology.
工业的快速发展和全球现代化进程导致气体排放增加，这带来了重大的环境和健康风险。因此，对精确且灵敏的气体监测技术的需求日益增长。本综述深入探讨了光声气体传感器的进展，特别关注声学池和声学探测器的关键组件。本综述强调光声光谱法（PAS）作为一种光学检测技术，称赞其具有高灵敏度、高选择性以及能够检测多种气态物质的能力。概述了光声气体传感器的原理，强调利用调制光吸收产生热量，随后将气体压力检测为声压。此外，本综述概述了光声气体传感器组件的最新进展，同时讨论了这些传感器的应用、挑战和局限性。它还包括光声气体传感器与其他类型气体传感器的对比分析，以及潜在的未来研究方向和机遇。本综述的主要目的是促进对光声气体检测技术的理解和发展。
