EP 1004031 A1 20000531 - ELECTRIC ARC MONITORING SYSTEMS
Title (en)
ELECTRIC ARC MONITORING SYSTEMS
Title (de)
ÜBERPRÜFUNGSSYSTEM FÜR ELEKTRO-LICHTBOGEN
Title (fr)
SYSTEMES DE SURVEILLANCE DES ARCS ELECTRIQUES
Publication
Application
Priority
- US 9816521 W 19980810
- US 9714497 W 19970814
Abstract (en)
[origin: WO9909422A1] Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena in that all essential information that signifies "arc" is contained in each fractal subset. These fractal subsets are logarithmically distributed over the arc spectrum. Monitoring of arcs is most advantageously effected on a fractal subset (16) of low logarithmic order where the amplitude is higher pursuant to the 1/f characteristic of electric arcs, where cross-induction among neighboring circuits is lower, and where travel between the arc (12) and the arc signature pickup (23) is longer than at the high frequencies customary for electric arc detection. Fractal subset transformation (17) reduces the danger of false alarms. Arc signature portions may be processed in out of phase paths (242, 342) or treated as modulated carriers (42) for monitoring. Aircraft may be equipped with spark monitoring systems (80) that record (82-86) occurence of dangerous sparking at different locations (92-96) aboard the aircraft (81).
IPC 1-7
IPC 8 full level
B23K 9/095 (2006.01); G01R 23/18 (2006.01); G01R 29/00 (2006.01); G01R 29/08 (2006.01); G01R 31/02 (2006.01); H01T 1/12 (2006.01); H01T 15/00 (2006.01)
CPC (source: EP)
G01R 23/18 (2013.01); G01R 29/0842 (2013.01)
Designated contracting state (EPC)
CH DE FR GB LI NL SE
DOCDB simple family (publication)
WO 9909422 A1 19990225; AU 4072197 A 19990308; AU 763046 B2 20030710; AU 9103198 A 19990308; CA 2298789 A1 19990225; CA 2298789 C 20040622; EP 1004031 A1 20000531; EP 1004031 A4 20041027; EP 1053479 A1 20001122; EP 1053479 A4 20030702; JP 2001518603 A 20011016; WO 9909424 A1 19990225
DOCDB simple family (application)
US 9816521 W 19980810; AU 4072197 A 19970814; AU 9103198 A 19980810; CA 2298789 A 19970814; EP 97938382 A 19970814; EP 98943182 A 19980810; JP 2000510035 A 19970814; US 9714497 W 19970814