Closed loop pressure determination system and method for fiber optic pressure transducer system
US5517998A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1994 |
| Grant date | May 21, 1996 |
| Priority date | — |
| Expiry date | Jan 24, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/03
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A closed loop control system for a fiber optic pressure transducer and a method of operation for such a system are disclosed. A flexible, pressure sensitive membrane of the pressure transducer is pressure coupled on one surface to a pressure to be measured and on its opposite surface to a sealed passage within an optical fiber pathway connected to a control module. The pressure within the passage is adjusted by a pressure generator to compensate for changes in the pressure being measured, in response to an output signal from a comparator in the control module. That output signal is the result of a comparison between a predetermined reference pressure signal and a modulated light signal from the pressure transducer indicative of a change in the measured pressure. The adjusted pressure within the lumen passage is sensed to provide a pressure reading equivalent to the measured pressure, since the pressure in the lumen passage is adjusted to equalize the pressures on the opposite surfaces of the pressure sensitive membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.