Time-synchronized TDLAS measurements of pressure and temperature in a gas turbine engine
US8699011B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2011 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | May 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/399
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of absorption spectroscopy to determine a rapidly variable gas parameter. The method includes transmitting light from a synchronization light source to a synchronization detector. The transmitted light is periodically interrupted by a moving mechanical part between the synchronization light source and synchronization detector. The output from the synchronization detector is used to generate a repeating time signal having variable phase delay. This signal is used to control the timing of laser spectroscopy wavelength scans. Multiple spectroscopic scans may be repeated at multiple selected time signal phase delay and the results averaged for each phase. Apparatus for implementing the above methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.