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- Title
Long Term Stable Δ-Σ NDIR Technique Based on Temperature Compensation.
- Authors
Shen, Chih-Hsiung; Yeah, Jun-Hong
- Abstract
Featured Application: With the development of industrial precision measurement, highly accurate and stable sensing systems usually require temperature compensation to maintain stability. In this study, the effects of ambient temperature are analyzed and a temperature compensation model is established for the NDIR gas sensing system with Δ-Σ structure to achieve a long term stable gas measurement. For a fast and long term stable Non Dispersive Infrared (NDIR) technology of gas concentration measurement, the temperature compensation is required. A novel proposed Δ-Σ NDIR system was investigated and built with a closed-loop feedback system to stabilize the signal readings without temperature drift. The modulation of the infrared heater gives a corresponding signal of gas concentration based on our proposed Δ-Σ conversion algorithm that was affected by the drift of temperatures for the infrared sensor. For our study, a new temperature compensation model was built and verified that formulates the relationship between gas concentration and temperature of sensor. The results show that our proposed Δ-Σ can measure efficiently with half of the startup time than our previous design and maintain long term stability.
- Subjects
INFRARED detectors; GAS measurement; CLOSED loop systems
- Publication
Applied Sciences (2076-3417), 2019, Vol 9, Issue 2, p309
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app9020309