Fiber-optic seismic sensor
US4534222A · kind A · utility
59Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1983 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | Aug 8, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/093
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vibration sensor is constructed by providing two preferably matched coils of fiber-optic material. When the sensor experiences vibration, a differential pressure is exerted on the two fiber coils. The differential pressure results in a variation in the relative optical path lengths between the two fibers so that light beams transmitted through the two fibers are differently delayed, the phase difference therebetween being a detectable indication of the vibration applied to the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.