Laser scanner, laser scanner measuring system, calibration method for laser scanner measuring system and target for calibration
US8310653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2009 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Dec 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/89
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to the present invention, a laser scanner measuring system, which has a laser scanner and a calibration target, wherein the laser scanner comprises a light emitting element for emitting a pulsed laser beam, a rotary projecting unit for projecting the pulsed laser beam for scanning, a distance measuring unit, which has a distance measuring light receiving unit, for measuring a distance by receiving a reflection light from an object to be measured, and a control unit for driving and controlling the light emitting element and the distance measuring unit, and wherein the calibration target has a reflection sector with a known shape and with high reflectance and is installed at a known position, comprising a step for judging a reflected pulsed laser beam from the reflection sector as received by the distance measuring light receiving unit by detecting a level of light quantity, a step for determining a center position of the reflection sector based on the result of the judgment, and a step for calibrating the laser scanner measuring system based on the determined center position and on the known position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.