Method and apparatus for digital detection of electronic markers using frequency adaptation
US7285958B2 · kind B2 · utility
48Cited by
11References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2004 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jul 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic marker locator with a digital architecture for providing accurate and consistent estimation of the signal strength is presented. The marker locator includes a Digital Phase-Locked Loop (DPLL) structure. The electronic marker locator transmits known and adjustable frequency bursts corresponding to the markers to be located while synchronously capturing the signals returned from the markers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.