Differential mode laser detection and ranging device
US8151646B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2008 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Sep 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to one embodiment, a system for measuring vibration includes multiple spatially separated detectors coupled to a differential signal analyzer and a light source. The light source generates a coherent light beam onto a target that is reflected as backscattered light. The differential signal analyzer receives signals from each of the detectors indicative of backscattered light from the target. The differential signal analyzer then applies a phase shift to a subset of the received signals and combines the phase shifted signals with signals from other detectors to form a differential signal representative of physical vibration of the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.