Method of detecting an optical transmission line
First Claim
1. A method of detecting an underground optical transmission line, comprising emitting acoustic vibration from a vibration generating means toward an underground area where the optical transmission line is buried, moving the vibration generating means on the ground, measuring changes in the intensity of an optical signal being transmitted through the optical transmission line subjected to the vibration, and displacing the vibration generating means to determine the location of the underground optical transmission line from a distribution of the intensity of the transmitted optical signal.
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Accused Products
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.
32 Citations
10 Claims
- 1. A method of detecting an underground optical transmission line, comprising emitting acoustic vibration from a vibration generating means toward an underground area where the optical transmission line is buried, moving the vibration generating means on the ground, measuring changes in the intensity of an optical signal being transmitted through the optical transmission line subjected to the vibration, and displacing the vibration generating means to determine the location of the underground optical transmission line from a distribution of the intensity of the transmitted optical signal.
Specification