Vibration detection apparatus and vibration detection method
US9726645B2 · kind B2 · utility
3Cited by
8References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 9, 2015 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Aug 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0289
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vibration detection apparatus includes a ring laser resonator, a fiber Bragg grating and a detection system. The ring laser resonator generates a laser beam propagating a ring shaped optical path. The fiber Bragg grating is disposed in the ring laser resonator such that the laser beam enters the grating, and has a transmittance distribution characteristic of transmitted light in a wavelength direction, which changes in accordance with vibration of an object. The detection system detects the vibration based on the transmitted light through the fiber Bragg grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.