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13 September 2024 Non-contact measurement for alcohol concentration based on near-infrared absorption
Tian-Jiao Luo, Jun-Bo Wang, Zhi-Jian Wang, Long-Tian Chen, Xin-Hua Wang
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Proceedings Volume 13254, Fourth International Conference on Optics and Image Processing (ICOIP 2024); 1325411 (2024) https://doi.org/10.1117/12.3039059
Event: Fourth International Conference on Optics and Image Processing (ICOIP 2024), 2024, Chongqing, China
Abstract
In this paper, we designed a non-contact measurement system of alcohol concentration based on near-infrared absorption. The system measures the absorption spectra of alcohol solutions with known concentration, and explores the relationship between solution concentration and absorbance. The results show that the linear correlation between the absorbance value and the solution concentration is more than 0.99, which is in good agreement with the theory. The least-squares method was used to fit the absorbance and alcohol concentration to establish the functional relationship. Besides, the incident light intensity and transmitted light intensity of the alcohol solution are measured to calculate the absorbance of alcohol solutions of different concentrations and then obtain solubility information of alcohol solutions. This system is characterized by simple structure and accurate and reliable measurement, which can effectively improve the efficiency of solution concentration measurement. In addition to measuring the concentration of alcohol solution, this program can also be applied to measure the concentration of other solutions, only with a light source of appropriate wavelength and the corresponding photoelectric detector, so the design of the program has a very broad application prospects.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Tian-Jiao Luo, Jun-Bo Wang, Zhi-Jian Wang, Long-Tian Chen, and Xin-Hua Wang "Non-contact measurement for alcohol concentration based on near-infrared absorption", Proc. SPIE 13254, Fourth International Conference on Optics and Image Processing (ICOIP 2024), 1325411 (13 September 2024); https://doi.org/10.1117/12.3039059
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KEYWORDS
Absorbance
Signal detection
Signal intensity
Indium gallium arsenide
PIN photodiodes
Incident light
Light absorption
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