Fiber optic pressure sensor systems
US5385053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Oct 6, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is related to numerous improvements for fiber optic measuring systems, and principally those utilizing a deformable diaphragm for sensing pressure. One feature of the invention is particularly oriented to automotive engine combustion chamber pressure measurement. For that application, a sensing tip shielding technique is described using a sintered metal porous plug, which reduces temperature fluctuations experienced at the sensing tip and shields the sensing tip from corrosive materials. A technique for compensation of a fiber optic pressure sensor is also described. In that method, a referencing wavelength is partly reflected and partly transmitted past a filter coating at the sensing end of the optical filament. This technique of the sensor provides improved calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.