Infrared and Laser Engineering, Volume. 52, Issue 12, 20230510(2023)
Design of non-contact measurement system for ethanol concentration using near infrared spectrometry characteristics
Figures & Tables(10)
Fig. 1. Light sources and sensors. (a) Infrared LED light source; (b) InGaAs photodiode
Fig. 6. The linear relationship between alcohol concentration value and voltage value
Fig. 7. A quadratic polynomial relationship between alcohol concen-tration values and voltage values
Table 1. Comparison table of different alcohol concen-tration values and corresponding voltage values
View tableView in ArticleTable 1. Comparison table of different alcohol concen-tration values and corresponding voltage values
Sample number Concentration value Voltage value/V 1 75.0% 0.767 2 74.6% 0.736 3 73.7% 0.703 4 71.8% 0.664 5 70.0% 0.630 6 65.3% 0.575 7 60.6% 0.524 8 58.3% 0.514 9 46.0% 0.429 10 35.3% 0.371 11 28.8% 0.340 12 22.1% 0.312 13 15.7% 0.291 14 9.50% 0.266 15 7.00% 0.259 16 4.10% 0.245 17 0% 0.237
Table 2. Comparison of measured and standard values
View tableView in ArticleTable 2. Comparison of measured and standard values
Sample number Standard value Measurements Absolute error 1 75.2% 74.6% 0.6% 2 72.7% 71.8% 0.9% 3 71.4% 70.3% 1.1% 4 64.7% 64.2% 0.5% 5 53.5% 52.9% 0.6% 6 42.5% 43.1% 0.6% 7 39.5% 39.7% 0.2% 8 35.3% 35.7% 0.4% 9 26.1% 26.9% 0.8% 10 18.5% 19.2% 0.7%
Table 3. Repeat and continuous measurements at the same concentration
View tableView in ArticleTable 3. Repeat and continuous measurements at the same concentration
Sample number Repeat the measurement Continuous measurements 1 72.8% 72.8% 2 72.8% 72.8% 3 72.7% 72.7% 4 72.7% 72.8% 5 72.7% 72.7% 6 72.6% 72.7% 7 72.8% 72.6% 8 72.7% 72.8% 9 72.8% 72.7% 10 72.8% 72.6%
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Tian Wang, Wei Wu, Ziyunxin Zhang. Design of non-contact measurement system for ethanol concentration using near infrared spectrometry characteristics[J]. Infrared and Laser Engineering, 2023, 52(12): 20230510
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Received: Aug. 31, 2023
Accepted: --
Published Online: Feb. 23, 2024
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