Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2005-06-21
2005-06-21
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C385S012000, C324S096000
Reexamination Certificate
active
06909977
ABSTRACT:
Wiring in new and older aircraft use bundled insulated conductors that are subject to deterioration overtime that can result in on-board fires, loss of in-flight control and eventual crashes of the aircraft. The present invention provides a diagnostic method which permits the on-line and non-destructive diagnosis of the insulation degradation in a portion of the wiring comprising: a) measuring the current flow at locations of the aircraft wiring utilizing an optical current sensor with a bandwidth of dc to 50 kHz; b) determining the current flow within a high frequency bandwidth; and c) analyzing the results of the current flow differential determination and initiate the following: i) detect and locate the point of cable failure; ii) initiate an alarm annunciation; and iii) initiate an on-board sectionalized fire suppression system.
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N.Inoue et al., Fault section detection system for 275-kV XLPE-insulated cables with optical sensing technique, Jul. 1995, IEE pp. 1148-1155.
K.Itaka et al., Fault section detecting system for power cable using optical magnetic field sensor, Nov. 1991, IEEE, p. 644-649.
Charioui Mohamed
Greer Burns & Crain Ltd.
Hoff Marc S.
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