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1. EP3786631 - OPTIMISATION D'UN RÉSEAU DE MEMBRANE ACOUSTIQUE

Office
Office européen des brevets (OEB)
Numéro de la demande 19194134
Date de la demande 28.08.2019
Numéro de publication 3786631
Date de publication 03.03.2021
Type de publication A1
CIB
G01N 29/26
GPHYSIQUE
01MÉTROLOGIE; TESTS
NRECHERCHE OU ANALYSE DES MATÉRIAUX PAR DÉTERMINATION DE LEURS PROPRIÉTÉS CHIMIQUES OU PHYSIQUES
29Recherche ou analyse des matériaux par l'emploi d'ondes ultrasonores, sonores ou infrasonores; Visualisation de l'intérieur d'objets par transmission d'ondes ultrasonores ou sonores à travers l'objet
22Détails
26Dispositions pour l'orientation ou le balayage
B06B 1/06
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
06PRODUCTION OU TRANSMISSION DES VIBRATIONS MÉCANIQUES, EN GÉNÉRAL
BPRODUCTION OU TRANSMISSION DES VIBRATIONS MÉCANIQUES EN GÉNÉRAL
1Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore
02utilisant l'énergie électrique
06fonctionnant par effet piézo-électrique ou par électrostriction
G01S 15/89
GPHYSIQUE
01MÉTROLOGIE; TESTS
SDÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES
15Systèmes utilisant la réflexion ou la reradiation d'ondes acoustiques, p.ex. systèmes sonar
88Systèmes sonar, spécialement adaptés à des applications spécifiques
89pour la cartographie ou la représentation
CPC
B06B 1/0622
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, ; e.g.; FOR PERFORMING MECHANICAL WORK IN GENERAL
1Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
02making use of electrical energy
06operating with piezo-electric effect or with electrostriction
0607using multiple elements
0622on one surface
B06B 1/0688
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, ; e.g.; FOR PERFORMING MECHANICAL WORK IN GENERAL
1Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
02making use of electrical energy
06operating with piezo-electric effect or with electrostriction
0688with foil-type piezo-electric elements, e.g. PVDF
G01N 29/2406
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
22Details ; , e.g. general constructional or apparatus details
24Probes
2406Electrostatic or capacitive probes, e.g. electret or cMUT-probes
G01N 29/262
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
22Details ; , e.g. general constructional or apparatus details
26Arrangements for orientation or scanning ; by relative movement of the head and the sensor
262by electronic orientation or focusing, e.g. with phased arrays
G01N 29/32
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
22Details ; , e.g. general constructional or apparatus details
32Arrangements for suppressing undesired influences, e.g. temperature or pressure variations ; , compensating for signal noise
G01N 2291/0427
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2291Indexing codes associated with group G01N29/00
04Wave modes and trajectories
042Wave modes
0427Flexural waves, plate waves, e.g. Lamb waves, tuning fork, cantilever
Déposants TNO
Inventeurs AKKERMAN HYLKE BROER
VAN NEER PAUL LOUIS MARIA JOSEPH
VOLKER ARNO WILLEM FREDERIK
États désignés
Données relatives à la priorité 19194134 28.08.2019 EP
Titre
(DE) OPTIMIERUNG EINES AKUSTISCHEN MEMBRAN-ARRAYS
(EN) OPTIMIZATION OF AN ACOUSTIC MEMBRANE ARRAY
(FR) OPTIMISATION D'UN RÉSEAU DE MEMBRANE ACOUSTIQUE
Abrégé
(EN)
An acoustic device (100) comprises an array of acoustic membranes (1,2,3,4) formed on a foil (10). Each of the acoustic membranes (1,2,3,4) is configured to vibrate at a resonance frequency (Fr) of the acoustic membranes (1,2,3,4) for generating respective acoustic waves (W1,W2,W3,W4). Relative phases (ΔΦ12,ΔΦ34) are determined at which the acoustic membranes (1,2,4,5) are actuated for generating a predetermined interference pattern (C) between the acoustic waves (W1,W2,W3,W4). A lamb wavelength (λs) is determined of lamb waves (Ws) at the resonance frequency (Fr) traveling through intermediate sections (10i,10j) of the foil (10) between adjacent acoustic membranes (1,2; 3,4). Distances (X12,X34) of the intermediate sections (10i,10j) between the adjacent acoustic membranes (1,2; 3,4) in the layout are determined in accordance with the relative phases (ΔΦ12,ΔΦ34) and the lamb wavelength (λs) for having the lamb waves (Ws), generated by one acoustic membrane (1,3), arrive in phase with an adjacent acoustic membrane (2,4).

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