Laser scanner, laser scanner measuring system, calibration method for laser scanner measuring system and target for calibration
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United States of America Patent
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Jan 15, 2013
Grant Date -
Aug 30, 2012
app pub date -
Apr 18, 2012
filing date -
Dec 25, 2008
priority date (Note) -
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Abstract
A laser scanner measuring system is disclosed, which has a laser scanner and a calibration target. The laser scanner comprises a light emitting element for emitting a pulsed laser beam, a rotary projecting unit for projecting the pulsed laser beam, a distance measuring unit, and a control unit for driving and controlling the light emitting element and the distance measuring unit. The calibration target has a reflection sector with a known shape and with high reflectance and is installed at a known position. In use, there is a step for judging a reflected pulsed laser beam from the reflection sector 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.
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