1 November 2016 Design of non-dispersion Infrared detector's data processor on measurement of automobile emission CO and CO2
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Proceedings Volume 10157, Infrared Technology and Applications, and Robot Sensing and Advanced Control; 101572Z (2016) https://doi.org/10.1117/12.2247216
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
For the technical requirements of automobile emission CO and CO2 detector’s data processor, the scheme is based on the detection principle of NDIR method and the implementation of the data processor software as well as hardware is discussed. High-speed, high-precision DSP is selected as the core of the detector’s data acquisition and processing, while four-channel thermoelectricity sensor TPS4339 as infrared detector, digital-analog data acquisition circuit of NDIR is designed and simulated. Then Fast Fourier Transform (FFT) is adopted for signal processing. Automobile emission CO and CO2 concentration can be accurately obtained by appropriately adjusting sampling period and the light source modulation frequencies, the system SNR is improved and the detection limit is reduced. The experimental results show that the detector’s data processor has 3% accuracy and stability which can meet the measurement and analysis of automobile emission CO and CO2 concentration.
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Guohua Liu, Guohua Liu, Yujun Zhang, Yujun Zhang, Chen Chen, Chen Chen, Yibing Lu, Yibing Lu, Chungui He, Chungui He, Yanwei Gao, Yanwei Gao, Kun You, Kun You, Ying He, Ying He, Kai Zhang, Kai Zhang, Wenqing Liu, Wenqing Liu, } "Design of non-dispersion Infrared detector's data processor on measurement of automobile emission CO and CO2", Proc. SPIE 10157, Infrared Technology and Applications, and Robot Sensing and Advanced Control, 101572Z (1 November 2016); doi: 10.1117/12.2247216; https://doi.org/10.1117/12.2247216
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