Qingchuan Zhao. Development of a Mid-Infrared Methane and Carbon Dioxide Dual-Gas Sensor System[J]. Acta Optica Sinica, 2020, 40(23): 2330001
- Acta Optica Sinica
- Vol. 40, Issue 23, 2330001 (2020)
Fig. 1. Schematic of mid-infrared methane and carbon dioxide sensing system
Fig. 2. Relation between spectra of Lms34 LED, Lms36 PD, Lms43 LED and Lms43 PD and main absorption peaks of methane and carbon dioxide
Fig. 3. Influences of temperature on emission intensity and peak wavelength of Lms34 LED
Fig. 4. LED array design drawing with thermoelectric cooling device
Fig. 5. Emission spectra of Lms34 LED at different pulse currents
Fig. 6. Pulse current driving timing of Lms34 LED and Lms43 LED
Fig. 7. Temperature influence factor curves
Fig. 8. Sensor system experiment platform
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Table 1. System measurement value under standard gas concentration in the temperature range from -20 ℃ to 50 ℃
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Table 2. Basic performance index of sensor system
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