Abstract: The invention relates to a method for detecting and locating a fault by reflectometry in an electrical circuit, such a method comprising the steps of: —emitting a reflectometry signal in a line of the circuit to be studied; —acquiring an electrical variable of the reflected signal passing through the network; —filtering the acquired signal so as to eliminate signals having a frequency lower than a cutoff frequency, the cutoff frequency having a value between 100 kHz and 1 GHz; —analysing an acquired signal so as to detect a fault.

Abstract: The invention relates to a method for detecting and locating a fault by reflectometry in an electrical circuit, such a method comprising the steps of: —emitting a reflectometry signal in a line of the circuit to be studied; —acquiring an electrical variable of the reflected signal passing through the network; —filtering the acquired signal so as to eliminate signals having a frequency lower than a cutoff frequency, the cutoff frequency having a value between 100 kHz and 1 GHz; —analysing an acquired signal so as to detect a fault.

Abstract: A method for analyzing a cable into which a reference signal s of time support limited to a duration T is injected comprises the following steps: calculating the intercorrelation, in a sliding window of duration D at least equal to 2T, between the injected reference signal s and a measurement r of the reflection of the reference signal s in the cable, normalizing the calculated intercorrelation by a factor dependent on the integration of the reflection measurement r over the same sliding window of duration D.

Abstract: A method for characterizing a fault affecting a cable in which a reference signal s of limited time support is injected and a measurement r of the reflection of the reference signal s in the cable is taken, comprises the following steps: identifying a section of the measurement r corresponding to a fault, this measurement section being called the signature of the fault; generating a modified reference signal s?, of parameterizable amplitude, equal to the sum of the reference signal s and of the reference signal s inverted and delayed by a parameterizable delay; determining conjointly the values of the parameterizable delay and of the parameterizable amplitude that minimize the error between the modified reference signal s? and the signature of the fault; and deducing therefrom an estimation of the length of the fault from the determined value of the delay.

Abstract: A method for analyzing a cable into which a reference signal s of time support limited to a duration T is injected comprises the following steps: calculating the intercorrelation, in a sliding window of duration D at least equal to 2T, between the injected reference signal s and a measurement r of the reflection of the reference signal s in the cable, normalizing the calculated intercorrelation by a factor dependent on the integration of the reflection measurement r over the same sliding window of duration D.

Abstract: A method for analyzing a cable into which a reference signal s(t) of bounded temporal support is injected comprises the following steps: acquiring a measurement signal r(t) characteristic of the measurement of the reflection of the reference signal s in the cable, identifying and selecting at least one point of the measurement signal r corresponding to when the signal crosses a zero value, generating, over a time interval centered around the at least one point with abscissa t0, and a modified signal z(t) with the aid of the following relation z(t0+t)=r(t0+t)?r(t0?t).

Abstract: A method for characterizing a fault affecting a cable in which a reference signal s of limited time support is injected and a measurement r of the reflection of the reference signal s in the cable is taken, comprises the following steps: identifying a section of the measurement r corresponding to a fault, this measurement section being called the signature of the fault; generating a modified reference signal s?, of parameterizable amplitude, equal to the sum of the reference signal s and of the reference signal s inverted and delayed by a parameterizable delay; determining conjointly the values of the parameterizable delay and of the parameterizable amplitude that minimize the error between the modified reference signal s? and the signature of the fault; and deducing therefrom an estimation of the length of the fault from the determined value of the delay.