1. College of Quality & Technology Supervising, Hebei University, Baoding, Hebei 071000, China
2. National and Local Joint Engineering Research Center for Metrology Instruments and Systems, Baoding, Hebei 071000, China
3. Measuring Instruments and Systems Engineering Laboratory of Hebei Province, Baoding, Hebei 071000, China
4. The Center of Measuring Instruments and Systems Engineering and Technology of Baoding, Baoding, Hebei 071000, China
Abstract：The stability of near-infrared (NIR) light source influences the reliability of NIR technology. Improving the stability of NIR power supply can improve the application of NIR technology in gas-liquid two-phase flow in laboratory. According to the experiment, the precise constant current source is used to power the NIR probe, which makes the NIR light source more stable and the output voltage more stable and reliable. The experiment shows that the range of output voltage is about 0.12 and the standard deviation is not more than 0.00838 when using high precision constant current source for power supply. While the range of output voltage obtained from ordinary power supply is about 0.16, and the standard deviation is no more than 0.02193.
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2022, Vol. 43 
