Commissariat a L'energie Atomique

Pascal Chambaud

Nicolas Ravot

Josy Cohen

The invention relates to a method and a device for analyzing electric cables in a network, for the detection and location of defects in networks comprising at least one junction from which there depart N secondary cable stretches. The method includes interposing in the network, in series at the input of each the secondary stretches (T, T) starting from the junction (A), a respective bidirectional passive filter (FR,FR) able to cut off a frequency band associated with this stretch. The filters all allow through the useful frequencies for the normal operation of the network. A pulsed test is applied to the input of the network signal modulated by N different carrier frequencies each situated in one of the N frequency bands of the filters. The temporal position of test signal spikes reflected for each of the N frequencies is detected, and deducing therefrom the position of possible defects on a stretch of cable of the network.

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Igny, France

Pascal Chambaud