EP 2158458 A1 20100303 - METHOD AND DEVICE FOR DETECTING WATER IN A CELLULAR STRUCTURE
Title (en)
METHOD AND DEVICE FOR DETECTING WATER IN A CELLULAR STRUCTURE
Title (de)
VERFAHREN UND EINRICHTUNG ZUM DETEKTIEREN VON WASSER IN EINER ZELLULAREN STRUKTUR
Title (fr)
PROCÉDÉ ET DISPOSITIF DE DÉTECTION D'EAU DANS UNE STRUCTURE ALVÉOLAIRE
Publication
Application
Priority
- EP 2008056796 W 20080602
- FR 0755459 A 20070605
Abstract (en)
[origin: WO2008148740A1] The invention relates to the detection of liquid (11) in a cavity (12) of a structure (1), e.g. a sandwich-structure cell with honeycomb core and carbon fibre composite coating. The structure is subjected to a mechanical vibration, at a frequency fm in the acoustic domain, by means of an excitation wave (14, 42), the area being explored is subjected to an incident electromagnetic wave (17) and the reflected electromagnetic wave (18) is analyzed to deduce therefrom the presence or the absence of liquid in cavities. The Faraday-induced wave (16) on the surface of the liquid (11) in the cavity (12) comprises subharmonic frequencies of fm which modulate the reflected electromagnetic wave (18) and make it possible to identify the presence of liquid. A detection device comprises means (10, 13, 40, 41) of generating the vibration excitation wave (14, 42), means (21, 22) of generating the incident electromagnetic wave (17), means (15, 19) of measuring the reflected electromagnetic wave (18), and processing means (20).
IPC 8 full level
G01F 23/284 (2006.01); G01N 22/04 (2006.01)
CPC (source: EP US)
G01F 23/284 (2013.01 - EP US); G01N 22/04 (2013.01 - EP US)
Citation (search report)
See references of WO 2008148740A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
FR 2917166 A1 20081212; FR 2917166 B1 20120427; BR PI0812236 A2 20141216; CA 2690102 A1 20081211; CN 101755192 A 20100623; CN 101755192 B 20120104; EP 2158458 A1 20100303; US 2010162818 A1 20100701; US 8176785 B2 20120515; WO 2008148740 A1 20081211; WO 2008148740 A9 20091230
DOCDB simple family (application)
FR 0755459 A 20070605; BR PI0812236 A 20080602; CA 2690102 A 20080602; CN 200880025032 A 20080602; EP 08760380 A 20080602; EP 2008056796 W 20080602; US 66316008 A 20080602