System for and method of detecting a buried conductor
US7969137B2 · kind B2 · utility
9Cited by
6References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 2009 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Oct 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/081
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for detecting a buried conductor comprises a transmitter for producing an alternating test current in the buried conductor and a receiver for detecting an electromagnetic field produced by the test current in the buried conductor. A communication link is provided between the receiver and the transmitter. The test current comprises first and second components of different frequency. The receiver monitors the phase creepage of the first and second components and controls the transmitter to reset the phase difference between the first and second components as phase creepage increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.