Fiber optical devices for measuring physical phenomenon
US4345482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1979 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Nov 14, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0077
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a fiber optical device for measuring physical magnitudes such as force, elongation, pressure, acceleration, temperature, etc., comprising a transducer unit and an electronic unit, in which the quantity to be measured is supplied to the transducer unit to affect the resonance frequency of an oscillating body included in the tansducer unit by changing the dimensions, mass, density, modulus of elasticity and/or mechanical stress of the body. A property of the body oscillation, such as frequency, phase position and/or amplitude, is used as a value of the quantity to be measured. The oscillations of the body are detected optically by means of a fiber optical position/movement detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.