Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber
文献类型：期刊论文
| 作者 | B.Wang; H.F.Lu; C.Chen; L.Chen; H.Q.Lian; T.X.Dai; Y.Chen |
| 刊名 | Applied Sciences-Basel
 |
| 出版日期 | 2019 |
| 卷号 | 9期号:13页码:11 |
| 关键词 | near-infrared,C2H2 detection,TDLAS,time division multiplexing,differential modulation,a multi-reflection chamber,sensor,tdlas,acetylene,enhancement,cell,ch4,co2,Chemistry,Engineering,Materials Science,Physics |
| DOI | 10.3390/app9132637 |
| 英文摘要 | A time division multiplexing differential modulation technique is proposed to address the interference problem caused by the fluctuation of laser light intensity in the single optical path detection system. Simultaneously, a multi-reflection chamber is designed and manufactured to further improve the system's precision with an optical path length of 80 m. A near-infrared C2H2 detection system was developed. The absorption peak of the acetylene (C2H2) molecule near 1520 nm was selected as the absorption line. A laser driver is developed, and a lock-in amplifier is used to extract the second harmonic (2f) signal. A good linear relationship existed between C2H2 concentration and the 2f signal, and the correlation coefficient was 0.9997. In the detection range of 10-100 ppmv, the minimum detection limit was 0.3 ppmv, and the precision was 2%. At 50 ppmv, C2H2 and continuous detection for 10 h, the data average was 50.03 ppmv, and the fluctuation was less than +/- 1.2%. The Allan variance method was adopted to evaluate the long-term characteristic of the system. At 1 s of integration time, the Allan deviation was 0.3 ppmv. When the integration time reached 362 s, the Allan deviation was 0.0018 ppmv, which indicates the good stability of the detection system. |
| 语种 | 英语 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/63028]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | B.Wang,H.F.Lu,C.Chen,et al. Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber[J]. Applied Sciences-Basel,2019,9(13):11. |
| APA | B.Wang.,H.F.Lu.,C.Chen.,L.Chen.,H.Q.Lian.,...&Y.Chen.(2019).Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber.Applied Sciences-Basel,9(13),11. |
| MLA | B.Wang,et al."Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber".Applied Sciences-Basel 9.13(2019):11. |
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