用于便携式NO浓度检测的光源特性研究  

Research on characteristics of the light source for portable NO concentration detection

作　　者：张恺 何莹 尤坤 张玉钧[2] ZHANG Kai;HE Ying;YOU Kun;ZHANG Yu-jun(National Synchrotron Radiation Laboratory,USTC,Hefei Anhui 230029,China;Anhui Institute of Optics andFine Mechanics,CAS,Hefei Anhui 230031,China)

机构地区：[1]中国科学技术大学国家同步辐射实验室,安徽合肥230029 [2]中国科学院安徽光学精密机械研究所环境光学研究中心,安徽合肥230031

出　　处：《光电子．激光》2020年第12期1245-1252,共8页Journal of Optoelectronics·Laser

基　　金：中国科学院战略性先导科技专项A类(XDA23010000)资助项目。

摘　　要：NO(一氧化氮)是一种有毒气体,主要来源于机动车尾气等,会导致酸雨,损坏人类呼吸道。因此,对NO浓度的检测具有重要的环保意义。论文介绍了基于朗伯比尔定律的NO浓度检测原理,对用于便携式NO浓度检测的滨松L9455-1脉冲氙灯的特性开展了实验研究,获得了最为合理的光源工作参数,即:光源的脉冲频率为5 Hz,光谱仪的积分时间为200 ms,光谱数据的平均次数为10次。此外,还将氙灯与氘灯光源进行了浓度检测效果的对比,体现了L9455-1在便携式NO浓度检测方面的优势。再将上述实验的结果应用于不同浓度NO的吸光度检测,测量结果证明采用实验研究得到的参数来设置L9455-1脉冲氙灯的工作指标,能让实验平台获得较为准确的NO吸光度,从而为便携式检测系统精确测量NO的浓度奠定良好的基础。NO(Nitric Oxide)is a colorless and odorless gas that is difficult to dissolve in water.It is mainly derived from the combustion of motor vehicle exhaust and fossil fuels,which can cause acid rain and damage the human respiratory tract.Therefore,it is of great environmental significance to monitor NO concentration.This paper introduces the principle of NO concentration detection based on Lambert-Beer′s law and sets up an experimental platform.Then the experimental study on the characteristics of Hamamatsu L9455-1 pulse xenon lamp for the NO concentration detection has been carried out.The fluctuation of light source,integral time of light source collection,average times and other practical problems occurred in the experiment have been studied carefully,and then the corresponding solutions have been put forward respectively.Finally,the most reasonable operating parameters of light source have been obtained,of which the pulse frequency of the light source is 5 Hz,the integration time of the spectrometer is 200 ms,and the average number of times of the spectral data is 10 times.The experimental results are compared with the deuterium lamp light source,which shows the advantages of L9455-1 in portable NO concentration detection.Then the above results have been applied to the NO absorbance detection of different concentrations.The detection results show that using the parameters obtained in the study to set the working index of L9455-1 pulse xenon lamp can obtain relatively accurate NO absorbance,which can lay a good foundation and be fully prepared for the entire portable detection system to measure the NO concentration accurately.

关 键 词：NO 便携式检测 朗伯比尔定律 脉冲氙灯 光源特性 

分 类 号：O433.1[机械工程—光学工程] O433.4[理学—光学]