一种新型甲醛质量浓度快速检测系统  

New Rapid Detection System for Formaldehyde Mass Concentration

作　　者：刘赟[1] 王波 刘智超[1,3] 

机构地区：[1]长春理工大学光电信息学院,吉林长春130000 [2]长春禹衡光学有限公司,吉林长春130000 [3]长春理工大学光电工程学院,吉林长春130000

出　　处：《河南科技大学学报（自然科学版）》2016年第4期101-104,9,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(60378019);吉林省教育厅"十二五"科学技术研究规划基金项目([2015]580)

摘　　要：为了快速获取被测气体中甲醛质量浓度,设计了一种基于特征光谱吸收的甲醛质量浓度快速检测系统。根据甲醛的特征光谱分布,选择1 730~1 737 cm^(-1)作为窄带滤光片的带通滤波区。利用多次折返吸收气室增大了有效光程,提高了对甲醛质量浓度的检测精度。针对新装修房屋、家具商场和封闭写字楼内的空气进行测试,并将测试结果与TT-PN-50P型甲醛检测仪的测试结果进行了比较。测试结果显示:当甲醛质量浓度高于100μg/m^3时,两者测试结果相近,平均误差小于2%;当甲醛质量浓度低于100μg/m^3时,系统测试结果比甲醛检测仪的测试结果小,平均误差增大,但仍满足测试要求。In order to quickly and accurately obtain the mass concentration of formaldehyde in measured gas,a new rapid detection system for formaldehyde mass concentration was designed based on spectral absorption characteristics. In accordance with the absorption spectrum distribution of formaldehyde,1 730 ~ 1 737 cm^(- 1)was selected as band-pass filtering area for the narrowband filter. The effective optical path length was increased with the multiple reentry absorb gas chamber,and the detection accuracy of formaldehyde mass concentration was improved. The air in newly renovated house,furniture stores and closed office buildings were tested,and the experimental data were compared with the TT-PN-50 P formaldehyde detector. Experimental results show when the formaldehyde mass concentration is higher than 100 μg / m^3,the test results are similar with the values from TT-PN-50 P formaldehyde detector,and the average error is less than 2%. When the formaldehyde mass concentration is less than 100 μg / m^3,the test data are smaller than the values from TT-PN-50 P formaldehyde detector,and the average error increases,but it still meets the test requirements.

关 键 词：特征光谱 多次折返吸收气室 窄带滤光片 甲醛浓度 

分 类 号：O433.1[机械工程—光学工程]