Detection of surface anomalies in elongate conductive members by

Details Detection of surface anomalies in elongate conductive members by Detection of surface anomalies in elongate conductive members by

1998-02-12

2000-06-06

Ballato, Josie

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324532, 324637, 324642, G01R 3108

Patent

active

060723165

ABSTRACT:
Pulse propagation analysis to ascertain whether and anomaly such as surface corrosion exists on a section of conductive member such as pipe. Anomalies such as surface corrosion result in localized velocity changes of pulses propagating along a conductive member. These localized velocity changes exhibit themselves in changes in waveform, rise and fall time, amplitude, and time delay of a pulse with respect to a fixed time reference. To allow such anomalies to be located, two pulses are generated such that they intersect at intersecting locations along the conductive member. The resulting modified pulses are analyzed for perturbations indicative of localized velocity changes.

REFERENCES:
patent: 4970467 (1990-11-01), Burnett
patent: 5243294 (1993-09-01), Burnett
patent: 5270661 (1993-12-01), Burnett
patent: 5719503 (1998-02-01), Burnett

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