Tunable Diode Laser Absorption Spectroscopy (TDLAS) Detection Signal Denoising Based on Gabor Transform

doi:10.3964/j.issn.1000-0593(2016)09-2997-06

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	Tunable Diode Laser Absorption Spectroscopy (TDLAS) Detection Signal Denoising Based on Gabor Transform
	Cui Hai-bin 1; Yang Ke 1,2; Zhang Long 1; Wu Xiao-song 1; Liu Yong 1; Wang An 1; Li Hui 3; Ji Min 1
刊名	SPECTROSCOPY AND SPECTRAL ANALYSIS
	2016-09-01
卷号	36 期号:9 页码:2997-3002
关键词	Tdlas Gabor Transform Second Harmonic Denoising
DOI	10.3964/j.issn.1000-0593(2016)09-2997-06
文献子类	Article
英文摘要	Tunable diode laser absorption spectroscopy (TDLAS) technology combined with wavelength modulation spectroscopy (WMS) technology is an important technique for trace gas detection. Detected with the lock-in amplifier, the second harmonic signal obtained after demodulation is analyzed to get the gas absorption information. However, the second harmonic signal is affected by noise which reduces the accuracy and stability of the detection system. To improve the signal to noise ratio (SNR) of the TDLAS detection system, a denoising method based on Gabor transform is proposed for second harmonic signal noise reduction. Taking the CH4 absorption spectrum at 1 653. 72 nm as an example, the effectiveness of the noise reduction method is verified through simulation and experiments. The simulation results show that the signal to noise ratio for the second harmonic signal of 0 dB can be improved 15. 73 dB with Gabor transform-based denoising method. Experimental results show that with the Gabor transform-based denoising method, the linear correlation coefficient r can be as high as 0. 996 59 between the second harmonic peak value and the CH4 concentration in the range of 0. 001%similar to 0. 02%. At the same time, the detection accuracy and stability of the system have been improved significantly.
WOS关键词	WAVELET TRANSFORM ; NOISE-REDUCTION ; ENHANCEMENT
WOS研究方向	Spectroscopy
语种	英语
WOS记录号	WOS:000383306800049
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/24729]
专题	合肥物质科学研究院_应用技术研究所
作者单位	1.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Appl Technol, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Beijing Tobacco Qual Supervis & Test Stn, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Cui Hai-bin,Yang Ke,Zhang Long,et al. Tunable Diode Laser Absorption Spectroscopy (TDLAS) Detection Signal Denoising Based on Gabor Transform[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2016,36(9):2997-3002.
APA	Cui Hai-bin.,Yang Ke.,Zhang Long.,Wu Xiao-song.,Liu Yong.,...&Ji Min.(2016).Tunable Diode Laser Absorption Spectroscopy (TDLAS) Detection Signal Denoising Based on Gabor Transform.SPECTROSCOPY AND SPECTRAL ANALYSIS,36(9),2997-3002.
MLA	Cui Hai-bin,et al."Tunable Diode Laser Absorption Spectroscopy (TDLAS) Detection Signal Denoising Based on Gabor Transform".SPECTROSCOPY AND SPECTRAL ANALYSIS 36.9(2016):2997-3002.