Enhanced sonde recognition
US7567875B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2005 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | May 18, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detector for locating a sonde is comprised of a plurality of antennas, a corresponding number of signal isolator modules 1 and a geometrical evaluation module. The magnetic signal generated by the sonde has a fundamental frequency and harmonic frequencies. A frequency spectrum analyzer 29 which forms part of the signal isolator module 1 has frequency bins which are aligned with the fundamental frequency and a plurality of harmonic frequencies of the magnetic signal produced by the sonde. The frequency bins follow variations in the frequency of the magnetic signal produced by the sonde which allows the detector to detect the sonde at a separation of up to 30m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.