Fiberoptic pressure transducer
US5425371A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Oct 28, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/02154
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A fiberoptic fluid pressure transducer system involving a thin flat diaphragm, fiberoptic elements, a tubular member having an opening of fixed dimensions on the side thereof, an L-shaped cantilevered beam and a remotely located electronic control unit. The cantilevered beam has one leg horizontally attached to a recessed ledge surrounding the opening such that a vertical leg extending from the horizontal leg, including a light reflector, extends into the opening. A diaphragm covers the opening and makes physical contact with the horizontal leg of the L-shaped beam. Pressure applied to the diaphragm flexes the horizontal leg of the beam which, in turn, causes a spatial displacement of the vertical leg with respect to the fiberoptic elements. The resulting change in reception of the reflected light is proportional to the pressure applied to the diaphragm or membrane. The sensitivity of the transducer can be altered and the system can have two or more levels of sensitivity over a range of pressure measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.