Can Liu, Changming Jin, Qiulin Tan, Lei Zhang, Yanan Zhang. Design of non-dispersive infrared CO2 sensor with temperature compensation[J]. Infrared and Laser Engineering, 2022, 51(3): 20210746
- Infrared and Laser Engineering
- Vol. 51, Issue 3, 20210746 (2022)
Fig. 1. (a) Diagram of air chamber structure; (b) Simulation of optical chamber
Fig. 2. Block diagram of system design
Fig. 3. Power module design
Fig. 4. Design of light source drive
Fig. 5. Module design of main control
Fig. 6. Module design of temperature and humidity collection
Fig. 7. (a) Preamplifier circuit; (b) Post-amplification circuit
Fig. 8. Main program flow module
Fig. 9. Chart of stability fluctuation
Fig. 10. Graph of relationship between concentration and peak-to-peak value at 25 ℃
Fig. 11. Relationship between the concentration value and the peak-to-peak value at different temperatures
Fig. 12. Relationship between temperature difference and voltage difference
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Table 1. Duplicated testing results
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