| 摘要 |
<p>The aim of the invention is to allow the detection and location of electrical faults in a network of metal structures (10) which can receive electric cables and allow the return of current by said cables. The reflectometry-based method involves injecting a probe signal into a cable coupled to the structures (10) and analyzing the signal reflected by the aforementioned anomalies. However, anomaly detection is made difficult by the background noise of the impedance variations of the return signal. To solve this problem, the invention provides a conductive element carrying the probe signal at a constant distance from each structure (10). In one embodiment of the invention, an insulated conductive element (C) is arranged inside the metal structure (10) and is built into a longitudinal groove (50) in a surface (11a) for receiving a longitudinal plastic holder (11) wedged into said structure (10). The reflected signal returned from the conductive element (C) is compared to a threshold above which an anomaly is detected, and said anomaly is located by means of topological correlation. The invention can be used for airplane raceways having a composite skin.</p> |
