Methods, device and installation for locating a defect in an electric link
AssigneeRTE EDF Transport
InventorsMatthieu Surdon, Christian Aucourt, Xavier Bourgeat
Life of this patent
Estimating the term…
Abstract
A method for detecting a defect in an electric link, which transmits, at a first moment, an electric signal having a predetermined propagation speed from an end of the electric link, and detects, at a second moment, reception of an echo of the electric signal. The method further establishes a model of the variation of the electric signal propagation speed in the electric link on the basis of the length of the link through which the signal flows, and estimates a first location of the defect based on the difference between the first and second moments, on the predetermined propagation speed at the start, and on the speed variation model in the link.
Claims6
A method for locating a defect in an electric link comprising:
- transmitting, at a first moment, an electric signal having a predetermined propagation speed at a start from an end of the electric link;
- detecting, at a second moment, reception of an echo of the electric signal;
- establishing a model of variation of the electric signal and its echo propagation speed in the electric link as a function of a length of electric link through which the transmitted electric signal and its echo have flowed;
- and
- estimating a location of the defect as a function of the difference between the first and second moments, on the predetermined propagation speed at the start, and on the speed variation model in the link,
- wherein the model includes a plurality of propagation speeds of the transmitted electric signal and its echo, the plurality of propagation speeds corresponding to a plurality of lengths of the electric link through which the transmitted electric signal and its echo have flowed, and the plurality of lengths of the electric link including lengths of the electric link shorter than a total length of the electric link.
A device for locating a defect in an electric link, configured to be connected to one end of the electric link, comprising:
- a signal generator for transmission, at a first moment, of an electric signal having a predetermined propagation speed at a start from an end of the electric link;
- a signal receiver for detection, at a second moment, of reception of an echo of the electric signal;
- means for storing data from a model of variation of the electric signal and its echo propagation speed in the electric link as a function of a length of electric link through which the transmitted electric signal and its echo have flowed;
- and
- a computer configured to estimate a location of the defect by the stored data, as a function of the difference between the first and second moments, of the predetermined propagation speed at the start, and of the speed variation model in the link,
- wherein the model includes a plurality of propagation speeds of the transmitted electric signal and its echo, the plurality of propagation speeds corresponding to a plurality of lengths of the electric link through which the transmitted electric signal and its echo have flowed, and the plurality of lengths of the electric link including lengths of the electric link shorter than a total length of the electric link.
Dependencies are inferred from the claim text.