Distinguishing false signals in cable locating
US7151375B2 · kind B2 · utility
23Cited by
5References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2005 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Apr 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/17
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Discriminating between a cable locating signal and a false cable locating signal is described. A reference signal, which contains a locating signal frequency impressed on it, is transmitted in a way which provides for detection of a phase shift between the locating signal and the false locating signal. Based on the phase shift, a receiver is used to distinguish the locating signal from the false locating signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.