突触形光声池的设计优化与性能评估  

Design Optimization and Performance Evaluation of Synaptic Photoacoustic Cell

作　　者：赵继娜 佟首峰[1] 江晟 陈建波 王嘉宁 赵宏宇 张爽[2] 张源峰 ZHAO Jina;TONG Shoufeng;JIANG Sheng;CHEN Jianbo;WANG Jianing;ZHAO Hongyu;ZHANG Shuang;ZHANG Yuanfeng(National and Local Engineering Research Center of Space Optoelectronic Technology,School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;School of Physics,Changchun University of Science and Technology,Changchun 130022,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;Henghui Optoelectronic Measurement Technology(Jilin)Co.,Ltd.,Changchun 130000,China)

机构地区：[1]长春理工大学光电工程学院空间光电技术国家地方联合工程研究中心,长春130022 [2]长春理工大学物理学院,长春130022 [3]中国科学院长春光学精密机械与物理研究所,长春130033 [4]珩辉光电测量技术(吉林)有限公司,长春130000

出　　处：《光子学报》2025年第2期173-188,共16页Acta Photonica Sinica

基　　金：国家自然科学基金(No.62005268);吉林省重点研发计划(No.20220203195SF);长春市科技攻关“揭榜挂帅”项目(No.23JG06)。

摘　　要：提出了一种针对异形光声池的参数优化方法,该方法结合了试验设计与非支配排序遗传算法,设计了一种突触形光声池并确定了其最佳尺寸,模拟了突触形光声池的声场与流场特性,比较了最优尺寸下突触形光声池与传统圆柱形光声池的各项性能指标。优化后的突触形光声池声压相对增长了41.8%、品质因数相对增长了16.03%,涡旋回流得到了改善,瞬态浓度平衡所需调节时间相对降低了62.75%,腔体容积相对降低了66.27%,各性能优化效果显著。以此为基础,搭建了NO_(2)光声光谱检测系统,实验结果表明,突触形光声池的谐振频率为2553 Hz,品质因数约为70.16,响应速度快,具有较好的稳定性,结构紧凑。为提升光声光谱检测系统中光声池性能的结构设计与参数优化提供参考。Photoacoustic Spectroscopy(PAS)technology is an essential technique for detecting gas concentrations due to its rapid response time,strong anti-interference capabilities,high sensitivity,and excellent resolution.These features have made PAS broadly applicable across fields such as atmospheric monitoring,power diagnostics,healthcare,and environmental analysis.In PAS,a modulated laser beam targets gas molecules contained within a sealed photoacoustic cell.Upon absorbing the laser energy,these molecules transition to a high-energy state and subsequently release the absorbed energy through nonradiative decay,returning to their initial state.This process converts the absorbed energy into kinetic energy,causing the periodic heating of the sample and surrounding medium,synchronized with the laser's modulation frequency.This periodic heating induces pressure fluctuations,which generate an acoustic signal.A micro-acoustic sensor then converts this acoustic signal into an electrical signal,enabling the precise measurement of gas concentration through data acquisition and processing.The photoacoustic cell,as the core component of the PAS detection system,serves as the medium for the sample's photoacoustic effect and is crucial for amplifying the signal while maintaining immunity to external interference.The cell’s shape and configuration significantly impact the system's sensitivity and signal-to-noise ratio,underscoring the importance of optimized cell design for advancing both theoretical understanding and practical applications.To enhance photoacoustic cell performance,various structural optimizations have been explored,including resonant cylindrical photoacoustic cells,H-type and T-type cells,ellipsoidal resonant cavities,and hyperbolic busbars.Conventional photoacoustic cell design often relies on finite element analysis to determine optimal dimensions by controlling variables and scanning parameters.However,for complex geometries,this process is time-intensive,creating demand for streamlined methods that can effecti

关 键 词：光声光谱 光声池 结构设计 参数优化 有限元分析 

分 类 号：TH744[机械工程—光学工程]