| 光谱学与光谱分析 |
|
|
|
|
|
| A New Method for Eliminating Background Signal Drift to Improve the Detection Precision in Continuous Harmonic Detection |
| ZHAO Ying1, ZHAO Xue-hong1,2*, WANG Zhe1, ZHANG Rui1,3, WANG Yan1 |
| 1. Collegy of Precision Instrumonts and Opto-Electronics Eningeering, Tianjin University, Tianjin 300072, China2. Tianjin Key Laboratory of Biomedical Detecting Techniques & Instruments, Tianjin 300072，China3. College of Electronic Information and Automation, Tianjin University of Science and Technology, Tianjin 300222, China |
|
|
|
|
Abstract To overcome the second harmonic background signal drift in gas continuous detection based on tunable diode laser absorption spectroscopy(TDLAS), a new method of background elimination was proposed by changing center current of the laser. This method can eliminated the effects of background signal drifting on concentration inversion. Based on the wavelength modulation theory, the theoretical expression of the second harmonic of the background signal is derived. In addition，the second harmonic background signal components and the factors that affect it are described. In different working temperatures, the relationship curve between thelaser current and output light intensity. In the process of continuous detection, we analyzes the feasibility ofchangingthe laser center current extraction of background signal. Combined with the principle of the background signal searching, the LabView flow chart was designed to search background center current. Ammonia(NH3) was detected by the TDLAS experimental system, which demonstrated the feasibility of the new method. The range of experiment parameters and the range of background center current searches were determined, in the situation that there was only one absorption line in the full laser workspace. The experimental results showed that this method realizes background signal extraction, reduces the error of concentration inversion and the effects of concentration inversion bybackground signal. Thus it improved the detection accuracy of the concentration. In the continuous detection experiment, the standarddeviation of inversion concentration reduced from 2.688 3 to 1.856 1, which demonstrated that the degree of dispersion of detected concentration is reduced, even eliminate the effects of background signal drifting on concentration inversion and the accuracy of detection is improved. This method provides an effective background drifting elimination approach for improving the detection accuracy of the concentration.
|
|
Received: 2014-08-19
Accepted: 2014-11-28
|
|
|
|
Corresponding Authors:
ZHAO Xue-hong
E-mail: zhaoxh@tju.ecu.cn
|
|
[1] TAO Bo, YE Jing-feng, ZHAO Xin-yan, et al(陶 波, 叶景峰, 赵新艳, 等). Chinese J. Laser（中国激光）, 2011, 38(12): 1215002.
[2] GAO Nan, DU Zhen-hui, QI Ru-bin, et al(高 楠，杜振辉，齐汝宾，等). Acta Optica Sinica(光学学报), 2012, 32(4): 0430004.
[3] HE Ying, ZHANG Yu-jun, WANG Li-ming, et al(何 莹，张玉钧，王立明，等). Optical Technique(光学技术), 2012, 38(4): 421.
[4] Gustafsson J, Chekalin N, Axner Q. Spectrochimica Acta Part B, 2003, 58(1): 123.
[5] Ruxton K, Chakraborty A L, Johnstone W，et al. Sensors and Actuators B Chemical，2010, 150(1): 367.
[6] Reid J, El-Sherbiny M, Garside B K. Appl. Optica Acta，1980, 19(19): 3349.
[7] Wu S Q, Kimishima T, Hiroaki K, et al. Japanese Journal of Applied Physics, 2000, 39(7A): 4034.
[8] Werle P W, Mazzinghi P, D’Amato F, et al. Spectrochimica Acta Part A，2004, 60(8-9): 1685.
[9] GUO Yuan, ZHAO Xue-hong, ZHANG Rui, et al(郭 媛, 赵学虹，张 锐，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2013, 33(8)：2172.
[10] HU Ya-jun, ZHAO Xue-hong, ZHANG Rui, et al(胡雅君, 赵学虹，张 锐，等). Acta Optica Sinica(光学学报), 2013, 33(11)：288.
[11] Schilt S, Thevenaz L，Robert P. Appl. Opt., 2003, 42(33): 6728.
[12] Ghafouri-Shiraz H. Distributed Feedback Laser Diodes and Optical Tunable Filters. Jone Wiley & Sons Ltd, 2003.
[13] Kevin Duffin, Andrew James McGettrick, WalterJohnstone, et al. Journal of Lightwave Technology，2007, 25(10): 3114. |
| [1] |
LI Zheng-hui1，3, YAO Shun-chun1，3*, LU Wei-ye2, ZHU Xiao-rui1，3, ZOU Li-chang1，3, LI Yue-sheng2, LU Zhi-min1，3. Study on Temperature Correction Method of CO2 Measurement by TDLAS[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(07): 2048-2053. |
| [2] |
CHEN Hao1,2，JU Yu1，HAN Li1，LIU Jun-biao1. Effects of Temperature of Laser Shell on Background Signals for Trace Gas Detection in TDLAS[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(06): 1670-1674. |
| [3] |
LI Meng, GUO Jin-jia*, YE Wang-quan, LI Nan, ZHANG Zhi-hao, ZHENG Rong-er. Study on TDLAS System with a Miniature Multi-Pass Cavity for CO2 Measurements[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(03): 697-701. |
| [4] |
CHEN Shu-wang1, WANG Zhao-zhao1, TANG Dong-lin2. Research on Low Cost Hydrogen Sulfide Sensor Based on Spectral Absorption[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(02): 611-615. |
| [5] |
ZHU Gao-feng1, 2, HU Xin1, ZHU Hong-qiu1*, HU En-ze1, ZHU Jian-ping3. The Multi-Beam Interference Suppression for Measuring Penicillin Vial’s Oxygen Concentration Based on Tunable Diode Laser Absorption Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(02): 372-376. |
| [6] |
ZHU Gao-feng1，2, YANG Chun-hua1, ZHU Hong-qiu1*, GUI Wei-hua1. Oxygen Concentration Detection and Calibration Method Improvement in Pharmaceutical Vial Based on Wavelength Modulation Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(10): 3133-3137. |
| [7] |
ZHOU Xin, JIN Xing. Study on Light Length Measurement of Absorption Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(09): 2844-2848. |
| [8] |
LIU Yong-sheng, HE Jian-jun*, ZHU Gao-feng, YANG Chun-hua, GUI Wei-hua. A New Method for Second Harmonic Baseline Correction and Noise Elimination on Residual Oxygen Detection in Packaged Xilin Bottle[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(08): 2598-2602. |
| [9] |
NIE Wei1, 2, YE Qing-hao3, XU Zhen-yu1, ZHANG Guang-le1, XIA Hui-hui1, 2, KAN Rui-feng1* . Study on the Method of Voigt Profiles Two Wings Fitting Non-Uniform Flow Field Absorbance [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(03): 816-821. |
| [10] |
LIU Pei-jin1, WANG Zhi-xin1, YANG Bin2, WEI Xiang-geng1 . Research on Measurement Method of Gas Velocity Combined Absorption Spectroscopy Technique and Cross-Correlation [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(02): 532-536. |
| [11] |
CHEN Yi-kang1, JU Yu2, HAN Li2 . Study on Pressure Characteristics of Photoacoustic Spectroscopy and TDLAS[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(01): 27-31. |
| [12] |
CUI Hai-bin1, YANG Ke1, 2, ZHANG Long1, WU Xiao-song1, LIU Yong1, WANG An1, LI Hui3, JI Min1* . Tunable Diode Laser Absorption Spectroscopy (TDLAS) Detection Signal Denoising Based on Gabor Transform [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(09): 2997-3002. |
| [13] |
DU Zhen-hui, ZHANG Zhe-yuan, LI Jin-yi, XIONG Bo, ZHEN Wei-meng . The Development of Ammonia Sensor Based on Tunable Diode Laser Absorption Spectroscopy with Hollow Waveguide [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(08): 2669-2673. |
| [14] |
WANG Xiao-yu1, LI Lin1*, LIN Lu2, ZHANG Zhen2, LU Zhou2, LIU Ming-hua2, GUO Yuan2* . Chiral Transformation of PARC18 Assemblies on NaOH Solution Subphase [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 47-50. |
| [15] |
LIU Yang1, WU Jia-nan4, CHEN Mei-mei1, YANG Xin-hua2*, CHEN Chen3* . The Trace Methane Sensor Based on TDLAS-WMS [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 279-282. |
|
|
|
|
