Fengxiang MA, Yue ZHAO, Chenxi LI, Ran AN, Feng ZHU, Chen HANG, Ke CHEN. Analysis system of dissolved gas in oil based on optical fiber photoacoustic sensing[J]. Chinese Journal of Quantum Electronics, 2023, 40(4): 597
- Chinese Journal of Quantum Electronics
- Vol. 40, Issue 4, 597 (2023)
Fig. 1. Schematic diagram of the structure of a dissolved gas analysis system in oil based on optical fiber photoacoustic sensing
![Absorption spectrum of acetylene gas[26]](/richHtml/lzdz/2023/40/4/597/img_02.jpg)
Fig. 2. Absorption spectrum of acetylene gas[26]
Fig. 3. Physical image of the laser drive circuit module
Fig. 4. Physical image of optical fiber photoacoustic sensor demodulation module
Fig. 5. FPGA spectrum signal acquisition circuit board physical image
Fig. 6. Interference spectra
Fig. 7. Second harmonic signal of dissolved acetylene gas in oil of different concentration
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Table 1. Measurement results of dissolved acetylene gas in different concentrations of oil
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