Impact detection system using an optical fiber sensor
US7696471B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 30, 2007 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Nov 30, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/35387
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is an impact detection system including: an optical fiber including a plurality of sensor sections to reflect light, a wavelength band of the reflected light vibrates depending on an elastic wave propagating through a subject to be inspected; a light source to input light into the optical fiber; optical filters each connected to an output terminal of the optical fiber; and an arithmetic processing unit to detect the impact from output values of sensor sections, wherein the wavelength bands of the sensor sections in the optical fiber are distributed such that the vibration bands caused by the impact to be detected do not overlap with each other, and a pass band of the optical filter corresponding to one of the sensor sections is distributed in the vibration band caused by the detection object, and is distributed in both sides of a center of the wavelength band of the one sensor section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.