Method and apparatus for underground line crossing detection
US8555722B2 · kind B2 · utility
1Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2009 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Feb 16, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for detecting contact between an underground electric wire conduit and an underground utility pipeline in which a detectable signal is applied to an electric line wire disposed within the underground electric wire conduit and the underground utility pipeline is monitored for a presence of the detectable signal. When there is a contact between the underground electric wire conduit and the underground utility pipeline, the signal applied to the electric line wire is detected by a suitable signal detector disposed on the surface of the utility pipeline and/or within the utility pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.