Hengkuan Li, Heng Piao, Peng Wang, Yankun Jiang, Zheng Li, Chen Chen, Na Qu, Huifeng Bai, Biao Wang, Meixuan Li. Development of high precision CO2detection system based on near infrared absorption spectroscopy[J]. Infrared and Laser Engineering, 2023, 52(3): 20210828
- Infrared and Laser Engineering
- Vol. 52, Issue 3, 20210828 (2023)
Fig. 1. CO2 absorption spectra with wave numbers of 4978.202 cm−1
Fig. 2. Schematic diagram of TDLAS trace amount of CO2 detection system
Fig. 3. Comparison of the second harmonic collected by the system before and after filtering by Kalman-wavelet analysis algorithm
Fig. 4. Diagram of 50-8000 ppmv CO2 concentration calibration
Fig. 5. Error result of Kalman-wavelet analysis algorithm
Fig. 6. Comparison experiment of CO2 detection stability of the system at 4000 ppmv concentration
Fig. 7. Allan deviation method detection limit
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