Acta Photonica Sinica, Volume. 52, Issue 3, 0352114(2023)
Remote Sensor System of Multi-component Gas Based on Wavelength Modulation Spectroscopy（Invited）
Figures & Tables(10)
Fig. 1. Intensity of absorption spectra of three gases in different wavelength ranges
Fig. 3. Comparison of non-normalized and normalized 2f signals with light intensity at different distances
Fig. 4. Measurement results of methane DAS signal and 2f signal intensity
Fig. 5. 2f signals for three gases with different integrated concentrations
Fig. 6. Calibration data for three gases with different integration concentrations
Fig. 7. Fluctuation of measured values for three gases at different remoting distances
Table 1. Calibrated measurements of three gases at different integral concentrations
View tableView in ArticleTable 1. Calibrated measurements of three gases at different integral concentrations
Integrated concentration/（ppm·m） Measured average concentration/（ppm·m） Standard deviation Relative error/% CH4 150 154 7.4 2.72 500 495 13.7 0.94 1 100 1 127 30.2 2.48 1 800 1 827 42.3 1.52 3 500 3 476 43.1 0.67 5 000 5 082 44.9 1.65 7 000 7 116 110.1 1.66 10 000 10 229 190.5 2.29 NH3 800 811 83.7 1.47 1 500 1 448 86.5 3.45 3 000 2 965 46.2 1.15 5 000 4 981 73.6 0.38 10 000 10 054 263.7 0.54 20 000 19 907 525.6 0.46 C2H2 80 84 11.1 4.39 150 151 9.1 0.47 300 315 15.6 5.12 500 545 21.6 9.07 1 000 996 71.1 0.35 2 000 2 028 56.1 1.43
Table 2. Integrated concentration measurements for three gases at different remoting distances
View tableView in ArticleTable 2. Integrated concentration measurements for three gases at different remoting distances
Distance/m Measured average concentration/（ppm·m） Standard deviation Relative error/% CH4（3 500 ppm·m） 10 3 492 37.3 0.24 20 3 435 67.2 1.86 30 3 381 59.2 3.40 40 3 172 50.2 9.38 NH3（5 000 ppm·m） 10 4 986 66.9 0.29 20 4 982 89.3 0.35 30 4 864 89.0 2.72 40 4 794 89.2 4.12 C2H2（300 ppm·m） 10 310 15.4 3.30 20 308 17.5 2.70 30 299 16.9 0.46 40 284 18.3 5.43
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Yuan JIANG, Ruijian ZHENG, Xinke XU, Longyang REN, Gang ZHAO, Yanting ZHAO, Weiguang MA. Remote Sensor System of Multi-component Gas Based on Wavelength Modulation Spectroscopy（Invited）[J]. Acta Photonica Sinica, 2023, 52(3): 0352114
Paper Information
Category: Special Issue for Frontiers and Techniques of Laser Spectroscopy
Received: Jun. 19, 2022
Accepted: Jul. 27, 2022
Published Online: Jun. 21, 2023
The Author Email: ZHAO Yanting (zhaoyt@sxu.edu.cn), MA Weiguang (mwg@sxu.edu.cn)
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