Multi-spectral gas quantification and differentiation method for optical gas imaging camera
US10684216B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2018 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | Jun 22, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10048
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas concentration-length quantification method may include: acquiring a multi-spectral image of detected radiance including a plurality of pixels using a multi-spectral optical gas imaging camera; estimating a background radiance for at least one of the pixels; calculating a gas concentration-length for the at least one of the pixels based on the detected radiance and the estimated background radiance; and triggering an alert when each alert condition in a list of alert conditions is satisfied. A multi-spectral configuration of the camera may include a reference band that is outside an absorption window of a target gas and an active band that includes at least a portion of the absorption window. Estimating the background radiance may include determining a model relating a detected radiance of the active band to a detected radiance of the reference band and using the model to estimate the background radiance for the active band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.