Method and device for detecting water in a cellular structure

Details Method and device for detecting water in a cellular structure Method and device for detecting water in a cellular structure

G - Physics

01

F

G01F 23/284 (2006.01) G01N 22/04 (2006.01)

Patent

CA 2690102

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 audible range, 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 wave (16) induced 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) for generating the vibration excitation wave (14, 42), means (21, 22) for generating the incident electromagnetic wave (17), means (15, 19) for measuring the reflected electromagnetic wave (18), and processing means (20).

L'invention concerne la détection de liquide (11) dans une cavité (12) d'une structure (1), e.g. une alvéole de structure sandwich à âme en nid d'abeille et revêtement en composite à fibre de carbone. La structure est soumise à une vibration mécanique, à une fréquence fm du domaine acoustique, au moyen d'une onde d'excitation (14, 42), la zone explorée est soumise à une onde électromagnétique (17) incidente et l'onde électromagnétique (18) réfléchie est analysée pour en déduire la présence ou l'absence de liquide dans des cavités. L' onde induite (16) de Faraday à la surface du liquide (11) dans la cavité (12) comporte des fréquences sous-harmonique de fm qui module l'onde électromagnétique réfléchie (18) et permet d'identifier la présence de liquide. Un dispositif de détection comporte des moyens (10, 13, 40, 41) de génération de l'onde d'excitation en vibration (14, 42), des moyens (21, 22) de génération de l'onde électromagnétique incidente (17) des moyens (15, 19) de mesure de l'onde électromagnétique réfléchie (18), des moyens (20) de traitement.

Affiliated with

Also associated with

Rating

Method and device for detecting water in a cellular structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for detecting water in a cellular structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for detecting water in a cellular structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1901239