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- Title
Carbon Dioxide Sensor Module Based on NDIR Technology.
- Authors
Zhou, Libing; He, Yaoyi; Zhang, Qing; Zhang, Lei
- Abstract
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).
- Subjects
CARBON dioxide detectors; PYROELECTRIC detectors; LEAST squares; INFRARED detectors; LIGHT propagation
- Publication
Micromachines, 2021, Vol 12, Issue 7, p845
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi12070845