Kong Guoli, Su Yu. Development of a multi-pass cell temperature control system for laser gas isotope detection[J]. Infrared and Laser Engineering, 2019, 48(8): 805006-0805006(7). doi: 10.3788/IRLA201948.0805006
Citation:
|
Kong Guoli, Su Yu. Development of a multi-pass cell temperature control system for laser gas isotope detection[J]. Infrared and Laser Engineering, 2019, 48(8): 805006-0805006(7). doi: 10.3788/IRLA201948.0805006
|
Development of a multi-pass cell temperature control system for laser gas isotope detection
- Received Date: 2019-03-11
- Rev Recd Date:
2019-04-21
- Publish Date:
2019-08-25
-
Abstract
The gas isotope abundance can be detected by laser absorption spectroscopy method. As the absorption coefficient of the absorption line of the gas to be measured can be affected by the temperature of the gas to be measured, the temperature of gas will directly affect the accuracy and stability of the gas isotope detection system. A high-precision multi-pass gas cell temperature control system was designed and developed in this paper. In hardware, a high-accuracy PT1000 platinum resistance temperature acquisition circuit and a polyimide electrothermal film heating device were used to form a complete closed-loop temperature control structure. In software, Ziegier-Nichols' engineering setting method was used to complete the three coefficient settings of P, I, and D. Aiming at the problem that a large amount of overshoot caused by the complex structure and slow response of the controlled object, the integral separation PID control algorithm was used to make the temperature control fast and without overshoot. The system was used for temperature control experiments, experimental results show that the temperature control range was 18-42℃, the temperature control precision is 0.08℃, and the stabilization time is 15 s. This multi-pass gas cell temperature control system has the advantages of high precision and fast response and no overshoot, which provides reliable guarantee for laser gas isotope detection.
-
References
[1]
|
Li Chunguang. Research and development of gas detection system based on mid-infrared semiconductor lasers[D]. Changchun:Jilin University, 2016:13-16. (in Chinese) |
[2]
|
Taylor S R. Stable isotope geochemistry[J]. Reviews of Geophysics, 2009, 17(4):839-850. |
[3]
|
Mckellar A R W, Watson J K G, Howard B J. The NO dimer:15 N isotopic infrared spectra, line-widths, and force field[J]. Molecular Physics, 1995, 86(2):273-286. |
[4]
|
Mantz A W, Henry A, Valentin A. Stabilized tunable diode laser measurements of the P(2) line in the 13CO fundamental band broadened by helium at temperatures between 11.5 and 298.6 K[J]. Journal of Molecular Spectroscopy, 2001, 207(1):113. |
[5]
|
Gao Wei, Cao Zhensong, Yuan Yiqian, et al. Design of a controllable low temperature cell and application[J]. Spectroscopy and Spectral Analysis, 2012, 32(3):858-861. (in Chinese) |
[6]
|
Ma Hongliang, Sun Mingguo, Cao Zhensong, et al. Cryogenic cell for low-temperature spectral experiments of atmospheric molecules[J]. Optics and Precision Engineering, 2014, 22(10):2617-2621. (in Chinese) |
[7]
|
Li Qiang, Chen Liheng. Thermal design of infrared detector components in complex heat flux[J]. Infrared and Laser Engineering, 2016, 45(9):0904002. (in Chinese) |
[8]
|
Chen Kai, Mei Maofei. Detection of gas concentrations based on wireless sensor and laser technology[J]. Laser Journal, 2018, 39(7):50-54. (in Chinese) |
[9]
|
Chen Chen, Qin Jianan, Zhang Xue, et al. Temperature controller for DFB laser utilized in SERF atomic magnetometer[J]. Infrared and Laser Engineering, 2016, 45(12):1205004. (in Chinese) |
[10]
|
Wang Yanzhang, Qin Jianan, Zhang Xue, et al. Non-magnetism heating system for atomic gas cell used in SERF atomic magnetometer[J]. Journal of Jilin University (Engineering and Technology Edition), 2017, 47(2):686-692. (in Chinese) |
[11]
|
Bao Meng. Laser temperature control system based on fuzzy theory and neural network[J]. Laser Journal, 2017, 38(10):123-126. (in Chinese) |
[12]
|
Liu Xin, Lv Tielian, Liu Jianxian, et al. DFB laser's high-precision and high-stability feed for-ward PID temperature control[J]. Laser Journal, 2017, 38(9):23-27. (in Chinese) |
[13]
|
Li Honglian, Li Feichao, Gao Shan, et al. The measurement uncertainty analysis and evaluation of the CO2 detection system based on TDLAS[J]. Laser Journal, 2017, 38(10):20-23. (in Chinese) |
-
-
Proportional views
-