Differential pressure measuring system and differential pressure measuring method
US7773231B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2009 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Aug 11, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0079
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A differential pressure measuring system includes a light source for emitting a light, a first transducer for attenuating the intensity of the emitted light in a first range, depending on a first pressure, and providing a first light, a second transducer for attenuating the intensity of the first light in a second range, depending on a second pressure, and providing a second light, a feedback circuit for adjusting the intensity of the emitted light to maintain the intensity of the second light in the second range constant, and a measuring module for measuring a differential pressure between the first and second pressures, based on the intensities of the second light in the first and second ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.