Method and apparatus for calibrating a non-contact gauging sensor with respect to an external coordinate system
US6134507A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | May 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The laser tracker is positioned at a vantage point to detect and calibrate its reference frame to the external reference frame demarcated by light-reflecting retro reflector. A tetrahedron framework with retro reflector mounted on one of the vertices serves as a reference target that is placed in front of the non-contact sensor to be calibrated. The laser tracker reads and calibrates the position of the retro reflector (and thus the tetrahedron) while the structured light of the non-contact sensor is projected onto the framework of the reference target. The structured light intersects with and reflects from the reference target, providing the non-contact sensor with positional and orientation data. These data are correlated to map the coordinate system of the non-contact sensor to the coordinate system of the external reference frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.