LASER-BASED POSITION MEASURING DEVICE
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United States of America Patent
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app pub date -
Mar 1, 2007
filing date -
Aug 25, 2004
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Abandoned
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Abstract
A position measuring device with a rotating laser beam includes a laser transmitter that is positioned in a polar coordinate system and emits at least one rotary laser beam in an essentially horizontally lying plane. A photosensitive position sensor delivers an electrical pulse, which is identified by length in time and phase angle, during illumination by the rotating laser beam. The phase angle and length in time of these pulses constitute a measure of the angular position and the radial distance of the sensor in the indicated polar coordinate system. Measurements are taken with the sensor generally positioned at predefined locations. The device determines the difference between the actual measurement point and the predefined target measurement point and adjusts the measurement data accordingly. The adjusted data is used to determine the flatness of a surface.
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