Lingyan CAO, Zhijun LI, Hongchao QI, Jikuang ZHAO, Chenxi LI, Ke CHEN. Ultra-high Sensitivity Detection Technology of Dissolved Gas in Oil Based on Miniature Resonant Photoacoustic Cell[J]. Acta Photonica Sinica, 2023, 52(3): 0352120
- Acta Photonica Sinica
- Vol. 52, Issue 3, 0352120 (2023)
Fig. 1. Structural diagram of the miniature resonant photoacoustic cell
Fig. 2. Simulated frequency response of the photoacoustic cell
Fig. 3. Structure diagram of vacuum degassing module
Fig. 4. Schematic diagram of the dissolved gas detection system based on miniature resonant photoacoustic cell
Fig. 5. Absorption spectra in the near-infrared band of 1
Fig. 6. Experimental frequency response of the micro-resonant photoacoustic cell
Fig. 7. Relationship between the photoacoustic signal amplitude and the modulation current
Fig. 8. The second harmonic response of the system to dissolved C2H2 oil samples with different concentrations
Fig. 9. The relationship between the peak values of second harmonic signals and the oil sample concentrations
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Table 1. Detection results of dissolved C2H2 in low concentration oil
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