Systems and method for distance measurement
US7764359B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2007 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Sep 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments of a distance measurement system are provided, in which a light signal generator comprises a first emission unit outputting a light beam to a target according to a first frequency-modulation signal, and a light-mixing unit generating a light mixing signal according to a second frequency-modulated signal and a reflection light beam reflected from the target. An electrical mixing unit generates an electrical mixing signal according to the first and second frequency-modulation signals, and a processing unit performs a phase difference estimation to obtain an evaluated value between the target and the distance measurement system according to the light mixing signal and the electrical mixing signal, and obtains a corresponding distance compensation value to compensate for the distance evaluated value according to an amplitude of the reflection light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.