Cable sensor
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United States of America Patent
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-
Mar 18, 2003
Grant Date -
Jun 27, 2002
app pub date -
Nov 15, 2001
filing date -
Nov 16, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sensor cable (10) for detecting and/or locating a deformation of the cable includes a conductive core (20), a dielectric layer (40), a controlled resistive layer (50), a piezoresistive layer (60), and an outer shield (70). Deformation of the cable (10) creates a change in resistance between the shield (70) and the controlled resistive layer (50), and also creates a piezoelectric-induced voltage between the conductive core (20) and the controlled resistive layer (50). The incidence and/or location of a deformation of the cable is deducible from electrical parameters, indicative of the change in resistance and the induced voltage, measured at one or both ends of the sensor cable.
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