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设计了一个完整的光纤气体测量系统,提高了检测SO2浓度精确度和读取时间。光路检测系统和分配系统相结合,用于实现在气体传感系统中光谱吸收检测技术和荧光检测技术的有效集成,从而可以扩大本仪器的应用领域和测量范围。光源调制锁定检测技术和双光路差检测技术也被结合在该系统中。在测量吸收光信号和荧光信号中,使用高精度空心光子带隙光纤传感探头,实现了较高的精度和灵敏度。实验数据和测量的结果表明,该系统具有较高的分辨率,大约为2 ppm,并且误差小于0.109。
A complete optical fiber gas measurement system was designed to improve the accuracy and readout time of detecting SO2. The combination of the optical path detection system and the dispensing system allows for the efficient integration of the spectral absorption and fluorescence detection technologies in the gas sensing system so as to expand the field of application and the measurement range of this instrument. Light source modulation lock detection technology and dual optical path difference detection technology is also incorporated in the system. In the measurement of light absorption and fluorescence signals, the use of high-precision hollow photonic bandgap fiber sensing probes achieves high accuracy and sensitivity. Experimental data and measurement results show that the system has a higher resolution, about 2 ppm, and the error is less than 0.109.