| 氨气激光在线检测中浓度精确反演的研究 |
| |
| 引用本文： | 何莹,张玉钧,王立明,尤坤.氨气激光在线检测中浓度精确反演的研究[J].光学技术,2012,38(4):421-426. |
| |
| 作者姓名： | 何莹 张玉钧 王立明 尤坤 |
| |
| 作者单位： | 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室 |
| |
| 基金项目： | 中国科学院知识创新工程重要方向项目(KZCX2-YW-JS408);国家自然科学基金项目(41071150);中国科学院合肥物质科学研究院青年人才基金项目(Y03RC21122) |
| |
| 摘 要： | 氨气是大气中含量最为丰富的碱性痕量气体,氨浓度检测是近年来环境和农业领域的一个重要研究方向。利用可调谐半导体激光吸收光谱(TDLAS)技术,结合波长高频扫描技术和多次反射池技术设计了氨气激光在线检测系统。通过激光中心波长锁定、背景基线拟合、吸收线型拟合、光强归一化和线性最小二乘拟合算法实现了氨浓度的精确反演。分析了系统性能,在24.32m光程下系统检测限为0.157mg/m3。使用该浓度反演方法实现了氨气的高灵敏、高精确在线检测。
|
| 关 键 词： | 激光技术 氨气 浓度反演 |
| 收稿时间： | 2012/2/23 |
Study on the concentration precise inversion in ammonia on-line detection by laser techniques |
| |
| HE Ying,ZHANG Yujun,WANG Liming,YOU Kun.Study on the concentration precise inversion in ammonia on-line detection by laser techniques[J].Optical Technique,2012,38(4):421-426. |
| |
| Authors: | HE Ying ZHANG Yujun WANG Liming YOU Kun |
| |
| Institution: | (Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,the Chinese Academy of Sciences,Hefei 230031,Anhui,China) |
| |
| Abstract: | Gaseous ammonia is the most abundant alkaline trace gas in the atmosphere,and ammonia concentration detection is one of the important research directions in environmental and agricultural fields in recent years.The ammonia on-line detection system is developed based on Tunable Diode Laser Absorption Spectroscopy(TDLAS) technology,combining with wavelength high frequency scanning technology and multi-pass cell technique.The ammonia concentration precise inversion is accomplished by laser center wavelength locking,baseline fitting,absorption line shape fitting,laser intensity normalization and linear least square fitting algorithm.The system performance is analyzed,the system detection limit is 0.157 mg/m3 at the optical path of 24.32m.The ammonia on-line detection with high sensitivity and high precision is realized by this concentration inversion method. |
| |
| Keywords: | laser techniques ammonia concentration inversion |
| 本文献已被 CNKI 等数据库收录！ |
|
