Method of detecting an optical transmission line
US5457998A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1993 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Mar 25, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S73/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of detecting an underground optical transmission line effectively and efficiently regardless if the optical transmission line is of a non-metallic type or not. The method comprises steps of emitting acoustic vibration from vibration generating means toward an underground area where the optical transmission line 1 is laid while moving the vibration generating means on a road roller 5 on the ground and measuring changes in the intensity of an optical signal being transmitted through the optical transmission line 1 subjected to the vibration and the displacement of the vibration generating means to determine the location of the underground optical transmission line 1 from the distribution of the intensity of the transmitted optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.