Three-dimensional (3-D) coordinate measuring method, 3-D coordinate measuring apparatus, and large-structure building method
US6559931B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2002 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Sep 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C11/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A 3-D coordinate measurement is performed in such a way that an electrooptical distance-measuring device is used to measure a linear distance to a target point set on a surface of a measurement object, an angle measuring device is used to measure shifted angles of an optical axis of the electrooptical distance-measuring device, and a 3-D coordinate of the target point is measured according to a measured distance and a measured angle after the optical axis of the electrooptical distance-measuring device has been aligned to the target point. The present method includes a coordinate recognizing step for observing a plurality of targets, recognizing a plurality of target points, and calculating approximate 3-D coordinates of the target points; a macroscopic sighting step for approximate aligning the optical axis of the electrooptical distance-measuring device; and a microscopic sighting step for aligning the optical axis of the electrooptical distance-measuring device to the one of the target points in the predetermined viewfield range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.