Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Soumaya Sallem

Nicolas Ravot

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.

Method of analyzing a cable, based on an auto-adaptive correlation, for the detection of soft defects

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&#x2032; and the signature of the fault; and deducing therefrom an estimation of the length of the fault from the determined value of the delay.

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Nogent sur Oise, France

Soumaya Sallem