| 多特征波长窗法检测痕量甲醛气体的研究 |
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| 引用本文： | Li YJ,Wang G. 多特征波长窗法检测痕量甲醛气体的研究[J]. 光谱学与光谱分析, 2011, 31(12): 3332-3335. DOI: 10.3964/j.issn.1000-0593(2011)12-3332-04 |
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| 作者姓名： | Li YJ Wang G |
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| 作者单位： | 中北大学电子测试技术国家重点实验室,山西太原,030051 |
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| 基金项目： | 国家自然科学基金项目(10874128); 中北大学电子测试技术国防科技重点实验室基金项目(9140C1204041009)资助 |
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| 摘 要： | 为了克服化学检测痕量甲醛气体速度慢、有耗材、采样区域局限等缺点,实现快速准确地检测甲醛气体的浓度,设计了一种多特征波长窗的方法。根据甲醛及主要干扰气体的特征光谱选择相干度最小的多组特征波长,特征波长个数分别选用3,4和5个,同时配合相应的多组窄带滤光片。当光源依次通过这些窗口及气室后,由PCI-2TE-13型红外探测器采集,并经相关算法反演样气中的甲醛浓度。实验针对新装修的房屋、建材商场、超市及公园四种环境下采集的样气中的甲醛进行定量分析。实验结果与ARCSpectro-A-MIR型红外光谱仪的检测结果相比较,结果表明,采用多特征波长窗法在10μg.m-3以上的检测结果均与标准值相近,其平均误差均小于5%,满足实际应用的要求,并且具有实时检测、不中毒等优点。
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| 关 键 词： | 光谱检测 多特征波长窗法 痕量气体检测 甲醛 |
Research on detecting trace formaldehyde gas by the multi-wavelengths characteristics method |
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| Li Yang-jun,Wang Gao. Research on detecting trace formaldehyde gas by the multi-wavelengths characteristics method[J]. Spectroscopy and Spectral Analysis, 2011, 31(12): 3332-3335. DOI: 10.3964/j.issn.1000-0593(2011)12-3332-04 |
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| Authors: | Li Yang-jun Wang Gao |
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| Affiliation: | LI Yang-jun,WANG Gao National Key Laboratory for Electronic Measurement Technology in North Univers ity of China,Taiyuan 030051,China |
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| Abstract: | In order to overcome the slow speed of detecting trace formaldehyde in the sample gas,material consumption by chem-ical reaction,and the limitations of the sampling area in the detection of trace formaldehyde,a multi-wavelength characteristicsmethod for getting the exact concentration of formaldehyde quickly was designed.According to the spectrum characteristics offormaldehyde and the main interfering gases the system chose multiple wavelengths with the minimum degree of coherence(thenumber of characteristi... |
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| Keywords: | Spectrum detection Multi-wavelengths characteristics method Trace gas detection Formaldehyde |
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