Method and apparatus locating a cable in a pipe
US6373252B1 · kind B1 · utility
15Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The relative position of a cable (10) within a pipe (16) is obtained by first applying a locating signal to a metallic part (12) of the cable so that the locating signal radiates beyond the pipe. The strength of the locating signal is measured at two separate distances from the cable via a pair of signal detectors (24, 26). By comparing the difference in the locating signal strengths to a predicted differential locating signal strength for a given cable depth within a pipe of known parameters, the actual cable depth can be detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.