Methods and systems for improvement of measurement efficiency in surveying
US6633256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2001 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Aug 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems for measuring coordinates of a target, particularly under strong multipath conditions, are described. A satellite navigation system antenna and a tilt sensor are mounted on a range pole, with the sensor at the pole's bottom tip. Signals from the antenna and tilt sensor are provided to a receiver, which computes the antenna's coordinates from the antenna signals, and the pole tips position from the computed coordinates and the tilt data. The operator places the pole tip on the target and swings the pole by hand over an angle sector of 15 degrees while keeping the tip on the target. Height of the target can be computed with a single measurement set, and X-Y coordinates with just three measurement sets. The use of additional measurements reduces errors in the target's coordinates since multipath errors are uncorrelated during movement of the antenna. Vertical alignment of the pole is unnecessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.