Patent ID: 9417215
Filing Date: 2016-08-16
CPC Classification: G01M,G01N

Claim Text:
1. A method comprising: introducing baseline vibrations into a fiber optic cable, the baseline vibrations generated with one or more of a designated frequency or a designated amplitude by automatically imparting a force onto a surface of ground in which the fiber optic cable is buried; monitoring changes in the baseline vibrations using the fiber optic cable; determining information about environmental conditions outside of the fiber optic cable based at least in part on the changes in the baseline vibrations that are monitored; monitoring second vibrations generated by movement of a vehicle using the fiber optic cable; determining information about the second vibrations; modifying the information about the second vibrations by one or more of shifting a frequency of one or more peaks in a frequency spectrum of the second vibrations or changing an amplitude of the one or more peaks in the frequency spectrum of the second vibrations by an amount that matches the changes in the baseline vibrations; and determining information about the vehicle based at least in part on the information about the second vibrations that is modified.