Embedded OMTDR sensor for small soft fault location on aging aircraft wiring systems

Wafa Ben Hassen (1, 2) , M.G. Roman (1, 2) , B. Charnier (1, 2) , N. Ravot (1, 2) , A. Dupret (1, 2) , A. Zanchetta (3) , F. Morel (3)

1 LFIC (CEA, LIST) - Laboratoire Fiabilité et Intégration de Capteurs (CEA, LIST)
2 LIST (CEA) - Laboratoire d'Intégration des Systèmes et des Technologies
3 Nicomatic

Based on OMTDR technology, the first embedded Smart Connector (SmartCo) which could locate very small soft defects resulting from partial degradation of cables is introduced in this paper. To do so, the SmartCo injects the generated OMTDR signal at an extremity of the cable and then listens to the echoes created at each discontinuity of the cable characteristic impedance. Since soft defects result in faint reflected energy, they are hard to distinguish from the noise. Hence, the SmartCo uses an innovative approach based on advanced post-processing methods data fusion to eliminate false alarms and to determine the small soft fault position.

Mots clés: Cables; Data fusion; Data handling; Defect; Fusion reactions; signal processing; Characteristic impedance; Innovative approaches; OMTDR; Partial degradation; Post processing; Postprocessing methods; Reflectometry; SmartCo; Embedded systems; instrumentation; diagnosis; cable

Domaines: Instrumentations et Détecteurs [physics.ins-det]

Wafa Ben Hassen, M.G. Roman, B. Charnier, N. Ravot, A. Dupret, et al.. Embedded OMTDR sensor for small soft fault location on aging aircraft wiring systems. Procedia Engineering, 2016, 168, pp.1698-1701. ⟨10.1016/j.proeng.2016.11.493⟩. ⟨cea-01838134⟩