Shenlong Zha, Hongliang Ma, Changli Zha, Jiajin Chen, Xing Huang, Kun Liu, Shengbao Zhan. Application of Broadband Photoacoustic Spectroscopy in Methane Concentration Detection[J]. Laser & Optoelectronics Progress, 2019, 56(4): 043001
- Laser & Optoelectronics Progress
- Vol. 56, Issue 4, 043001 (2019)
Fig. 1. Schematic of methane concentration detection system. (a) Broadband PAS detection system; (b) DAS detection system
Fig. 2. DAS signal of methane at different concentrations
Fig. 3. Methane concentration detected by broadband PAS detection system and DAS system
Fig. 4. Allan variance for detected methane concentration
Fig. 5. Photoacoustic signals under different pressures
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