光学学报, 2020, 40 (7): 0730003, 网络出版: 2020-04-15
基于微型光声传感器的油中溶解气体检测技术 
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Technique for Detection of Dissolved Gas in Oil Based on Miniature Photoacoustic Sensor
图 & 表
图 1. 模拟曲线图。 (a)幅频响应;(b) SNR随频率变化的关系
Fig. 1. Simulaed curves. (a) Response between amplitude and frequency; (b) relation between SNR and frequency
图 2. 光声探头结构图。(a)油气分离与传感一体化探头示意图;(b)油气分离膜的结构
Fig. 2. Structure of photoacoustic probe. (a) Schematic of oil-gas separation and integrated sensor probe; (b) structure of oil-gas separation membrane
图 4. C2H2和干扰气体的近红外吸收系数
Fig. 4. Absorption coefficients of C2H2 and interfering gases in the near-infrared region
图 5. 基于激光光声光谱的油中溶解气体检测系统示意图
Fig. 5. Diagram of detection system with gas dissolved in oil based on laser photoacoustic spectroscopy
图 6. 不同调制电流下的光声信号电压值
Fig. 6. Photoacoustic signal voltage under different modulation currents
图 8. 不同体积分数下C2H2的信号。(a)二次谐波信号;(b)二次谐波光声信号的峰值电压
Fig. 8. Signals of C2H2 under different volume fractions. (a) Second harmonic signal; (b) peak voltage of second harmonic photoacoustic signal
图 9. Allan方差分析结果。内插图是体积分数为10-6的油中溶解C2H2气体的长时间测量结果
Fig. 9. Result of Allan deviation analysis. Inset is continuous measurement results of C2H2 gas dissolved in oil with volume fraction of 10-6
马凤翔, 田宇, 陈珂, 靳丰, 张望, 祁炯, 于清旭. 基于微型光声传感器的油中溶解气体检测技术[J]. 光学学报, 2020, 40(7): 0730003. Fengxiang Ma, Yu Tian, Ke Chen, Feng Jin, Wang Zhang, Jiong Qi, Qingxu Yu. Technique for Detection of Dissolved Gas in Oil Based on Miniature Photoacoustic Sensor[J]. Acta Optica Sinica, 2020, 40(7): 0730003.
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