Self-commissioning NDIR gas sensors
US8217355B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2012 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Mar 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0662
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Two detectors of the same kind, each having an identical neutral band-pass filter to the target gas, are installed next to Signal channel and Reference channel detectors as pairs in an AB designed NDIR gas sensor layout, which are called Standard Signal channel detector and Standard Reference channel detector. “Standard” GAMMA is the ratio of Standard signal channel detector output over that of Standard Reference channel detector. “Standard” GAMMA is independent of the measurement Physics of NDIR gas sensors, is dependent only upon the performance characteristics of the sensor component and is also independent of the presence of any amount of target gas in the sample chamber. Consequently, “Standard” GAMMA can be used to proportionally correct and update GAMMA of the sensor as its components age over time thereby rendering such an AB designed NDIR gas sensor self-commissioning or staying accurate over time after initial calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.