Method and apparatus for monitoring cable integrity by...

Details Method and apparatus for monitoring cable integrity by... Method and apparatus for monitoring cable integrity by...

G - Physics

01

S

349/23

G01S 15/88 (2006.01) G01N 29/04 (2006.01)

Patent

CA 1187974

Abstract A system for monitoring the integrity of a cable, for example a cable for towing a variable depth sonar body through the ocean, is described. Such a cable comprises a core of electrical wires surrounded by load bearing wires which support through a terminator the sonar body. For various reasons cracks can appear in the load bearing wires and in extreme cases one or more of the wires may break. The monitoring system includes a transducer located near the terminator where the wires are most likely to crack or break and acoustic emissions caused by the incidence of cracks or breaks are picked up by the transducer. The resulting electrical signals are amplified and passed up the electrical core of the cable to the towing vessel where they are processed. Novel aspects of the system are the water coupling between the location of the cracks or breaks and the transducer and special processing circuitry which enables breaks, cracks and electrical noise to be distinguished from each other.

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