Optics: measuring and testing – Material strain analysis
Patent
1991-09-09
1992-11-03
McGraw, Vincent P.
Optics: measuring and testing
Material strain analysis
2541344, 356 731, G01B 1116, B65H 5938
Patent
active
051609720
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: 4081258 (1978-03-01), Goell et al.
patent: 4555175 (1985-11-01), Gardner et al.
Krahn et al, "Installation & Field Measurement Equipment for Optical Communication Cables", Proceedings of 28th International Wire & Cable Symposium; Nov. 13-15, 1979, pp. 357-363.
Tanaka et al, "Precise Measuring Method of Elongation & Residual Strain of Optical Fiber Due to Cabling Processes", Proc. of 7th European Conf. on C.r. Comm., Sep. 1981, pp. 6.6-1 to 6.6-4.
Johnson et al, "Fibre Optical Strain Range", Electronics Letters (Jul. 6, 1978), vol. 14 #14, pp. 432-433.
Harrison David F.
Healy Martin
Marlow Ernest C.
Walters David L.
McGraw Vincent P.
STC PLC
LandOfFree
Apparatus for controlling deployment of a cable does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for controlling deployment of a cable, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for controlling deployment of a cable will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2053385