Methane gas spectral imaging method based on dual wedge scanning mirrors
文献类型：期刊论文
| 作者 | Wang Xia-Chun1,5; Zhang Zhi-Rong1,2,4 ; Cai Yong-Jun3; Sun Peng-Shuai1; Pang Tao1; Xia Hua1; Wu Bian1; Guo Qiang1
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| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2024-06-05 |
| 卷号 | 73 |
| ISSN号 | 1000-3290 |
| DOI | 10.7498/aps.73.20231906 |
| 通讯作者 | Zhang Zhi-Rong(zhangzr@aiofm.ac.cn) |
| 英文摘要 | With the increase in the number of oil and gas pipelines laid in China, more attention needs to be paid to pipeline maintenance work. At present, the main methods of detecting natural gas leaks in oil and gas transmission stations include manual inspections, opposing natural gas detection equipment, and cloud desktop natural gas detection equipment. Hand held natural gas detection equipment is used for manual inspection, which requires regular manual inspection. However, the response speed is poor and gas leaks cannot be detected in a timely manner. The opposed laser gas detection method can only detect the presence of gas on the beam path. If a larger area of leakage detection is desired, more equipment needs to be installed, resulting in a greatly increase in hardware costs. The existing cloud desktop laser gas detection method controls the deflection of the laser beam through the cloud platform to achieve leak detection at various points in the area to be tested. However, the rotation speed of the cloud platform is slow, and a complete detection cycle takes dozens of minutes, and only the presence of gas can be detected. For accurate leak location, manual on-site survey is also required to further determine the leak location. In order to meet the needs of the real-time monitoring and rapid positioning of oil and gas pipeline leaks, in this work, a fast and accurately controlled dual wedge scanning mirror system is designed, which combines tunable semiconductor laser absorption spectroscopy technology to convert the gas measurement laser beam from point measurement to surface measurement, thereby obtaining the two-dimensional distribution of gas, which is conducive to subsequent analysis and positioning of gas leakage sources. By using the inverse solution iterative optimization algorithm, the angle of the wedge mirror is controlled to obtain an efficient and uniform beam scanning trajectory. The deflection direction and detection position of the laser beam are fused with the corresponding methane concentration information, and a methane concentration data containing position information is constructed. In order to quantitatively verify the measurement accuracy and spatial resolution in the experiment, a standard air bag is used to simulate the methane leakage distribution. The results show that the minimum detection limit of the system can be lower than 5x10(-4) m, and the spatial resolution can be less than 6 cm. At the same time, this method can adjust the scanning step node based on the measurement distance of the oil from gas station, thereby achieving adjustable imaging resolution. This imaging method provides a new idea for accurately positioning and detecting the methane leakage location and amount. |
| WOS关键词 | LASER SYSTEM ; HAND-HELD ; OPEN-PATH |
| 资助项目 | National Key Research and Development Program of China[2022YFB3207601] ; National Key Research and Development Program of China[2021YFB3201904] ; National Natural Science Foundation of China[11874364] ; National Natural Science Foundation of China[41877311] ; National Natural Science Foundation of China[42005107] ; Spark Fund Project of Hefei Institutes of Physics Science, Chinese Academy Sciences[YZJJ2022QN02] ; Outstanding Youth Research Project of Anhui Provincial Department of Education, China[2022AH020098] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001245970700013 |
| 出版者 | CHINESE PHYSICAL SOC |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Spark Fund Project of Hefei Institutes of Physics Science, Chinese Academy Sciences ; Outstanding Youth Research Project of Anhui Provincial Department of Education, China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/136373]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhang Zhi-Rong |
| 作者单位 | 1.Chinese Acad Sci, Hefei Inst Phys Sci Chinese, Anhui Inst Opt & Fine Mech, Anhui Prov Key Lab Photon Devices & Mat, Hefei 230031, Peoples R China 2.Natl Univ Def Technol, Adv Laser Technol Lab Anhui Prov, Hefei 230037, Peoples R China 3.PipeChina Gen Acad Sci & Technol, Langfang 065000, Peoples R China 4.Chinese Acad Sci, Hefei Inst Phys Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 5.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Xia-Chun,Zhang Zhi-Rong,Cai Yong-Jun,et al. Methane gas spectral imaging method based on dual wedge scanning mirrors[J]. ACTA PHYSICA SINICA,2024,73. |
| APA | Wang Xia-Chun.,Zhang Zhi-Rong.,Cai Yong-Jun.,Sun Peng-Shuai.,Pang Tao.,...&Guo Qiang.(2024).Methane gas spectral imaging method based on dual wedge scanning mirrors.ACTA PHYSICA SINICA,73. |
| MLA | Wang Xia-Chun,et al."Methane gas spectral imaging method based on dual wedge scanning mirrors".ACTA PHYSICA SINICA 73(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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