Method and apparatus for use in location of conductors
US6556136B2 · kind B2 · utility
0Cited by
16References
13Claims
0Family size
Inventor
Key dates
| Filing date | Jun 5, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Jun 5, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/15
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Buried elongate conductors (e.g. pipes and cables) are located using an antenna assembly of ten vertical coils (A-J) arranged in two identical rows (A-E and F-J) arranged one above the other. Currents induced in the coils by alternating currents in buried conductors are fed to signal processing circuitry (12). This calculates parameters whose values can reliably indicate when a conductor is vertically beneath the antenna, and can indicate its depth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.