Carbon Dioxide Sensor Module Based on NDIR Technology
In this paper, a gas detection system with an environmental compensation algorithm based on nondispersive infrared (NDIR) technology was designed. The prepared infrared pyroelectric detector was a dual-channel type based on the lithium tantalate (LiTaO3) wafer. The design of the optical gas chamber...
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Veröffentlicht in: | Micromachines (Basel) 2021-07, Vol.12 (7), p.845 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this paper, a gas detection system with an environmental compensation algorithm based on nondispersive infrared (NDIR) technology was designed. The prepared infrared pyroelectric detector was a dual-channel type based on the lithium tantalate (LiTaO3) wafer. The design of the optical gas chamber adopted a combination of two ellipsoids and a spherical top surface, which not only enhanced the coupling efficiency of the light propagation but also facilitated the miniaturization of the sensor module. In addition to this, a temperature and humidity compensation algorithm based on the least square method was proposed to make the measurement accuracy up to ±0.9% full scale (FS). |
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ISSN: | 2072-666X 2072-666X |
DOI: | 10.3390/mi12070845 |