CABLE WITH OPTICAL FIBER FOR PRESTRESSED CONCRETE
1 Assignment
0 Petitions
Accused Products
Abstract
A reinforcing cable for a prestressed concrete structure is disclosed. The cable has an optical fiber entwined between the twisted wire ropes that form the cable. The optical fiber facilitates in situ monitoring of cable integrity by comparing optical signal transmission over time.
271 Citations
28 Claims
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1. (canceled)
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8. A cable, comprising:
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one or more wire ropes twisted together, each wire rope comprising a plurality of wire strands twisted together; and one or more optical fibers entwined with and contacting at least some of the one or more twisted wire ropes, each optical fiber comprising a core configured to transmit an optical signal and a cladding around the core, wherein the plurality of wire strands is selected from the group consisting of PC steel wire, PC twisted steel wire, PC hard steel wire, and any combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9)
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10. A cable, comprising:
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one or more wire ropes twisted together, each wire rope comprising a plurality of wire strands twisted together; and one or more optical fibers entwined with and contacting at least some of the one or more twisted wire ropes, each optical fiber comprising a core configured to transmit an optical signal and a cladding around the core, further comprising a filling agent in the gaps between the one or more twisted wire ropes and the one or more optical fibers. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for in situ monitoring of cable integrity in externally reinforced prestressed concrete, the system comprising:
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one or more reinforcing cables, each reinforcing cable comprising one or more wire ropes twisted together, each wire rope comprising a plurality of wire strands twisted together; and one or more optical fibers entwined with and contacting at least some of the one or more wire ropes, each optical fiber comprising a core configured to transmit an optical signal and a cladding around the core; an optical signal transmitter configured to emit an optical signal at a first end of the one or more optical fibers at a first time and a second time; an optical signal receiver configured to receive the optical signal at a second end of the one or more optical fibers; and a signal monitor, coupled to the optical signal receiver, and configured to identify changes in signal transmission through the one or more optical fibers between the first and second times. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28-41. -41. (canceled)
Specification