Surveying instrument
US9784842B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2015 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Mar 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a surveying instrument, which comprises a control device having a reference clock signal generating unit for producing a reference clock signal. The control device produces a time signal to indicate a standard time from a signal acquired from the GNSS device, puts a time stamp on the time signal, associates the time signal with the reference clock signal, measures a horizontal angle at a moment when the telescope unit sights the sun and acquires an image signal, puts a time stamp on the image signal, calculates a standard time at a time of image acquisition, calculates an azimuth angle of the sun at the standard time based on a latitude and a longitude of a point where the surveying instrument is installed and a standard time at the time of image acquisition, and updates a horizontal angle by the azimuth angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.