Deploying cables

Details Deploying cables Deploying cables

1990-10-05

1992-02-25

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Method or apparatus for placement of conductive wire

By fluid pressure differential in conduit

B65H 5900

Patent

active

050906658

ABSTRACT:
A method of installing a cable, particularly but not exclusively in a duct filled with flowing liquid, wherein, as the cable is deployed, the strain in the cable is determined by sending a signal down the cable and receiving a signal back from the cable. The speed of deployment is adjusted according to the strain detected. Preferably the system is applied to optical cables, and a radio frequency signal is modulated on an optical carrier. optical connection to the cable on the rotating drum is made via an optical slip-ring. The front end of the cable has a silvered end termination for reflecting the modulated signal back along the fibre to be detected by an optical receiver, and there is a vector voltmeter for determining the phased difference between the signals to thus determine the strain in the cable.

REFERENCES:
patent: 3931938 (1976-01-01), Husegawa et al.
patent: 4500043 (1985-02-01), Brown
patent: 4669705 (1987-06-01), Langston
patent: 4728079 (1988-03-01), Nitta et al.

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