Method and system for monitoring a condition of electrical cables
US10359462B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2013 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Jun 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a system are described for monitoring a condition of an electrical cable. The method comprises applying a broadband signal wave to a first end of the electrical cable, wherein the broadband signal wave is phase and amplitude modulated and acquiring the phase and amplitude modulated broadband signal wave transmitted and reflected by the electrical cable. Signal analyses is performed which results in establishing a relationship between a real and an imaginary part of a phase impedance spectrum Fourier transform of the power spectrum in an interval around at least one of the locations along the cable, and identifying impedance changes in these locations. Analyzing a second order reflection of the broadband signal in said identified fault locations may establish a local degradation severity of an identified fault in the cable insulation in at least one of the locations along the cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.