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1. (WO2019030751) PHOTOACOUSTIC EXCITATION SENSING ENHANCED BY CROSS-CORRELATED UNFOCUSED SPECKLE IMAGES
Latest bibliographic data on file with the International BureauSubmit observation

Pub. No.: WO/2019/030751 International Application No.: PCT/IL2018/050867
Publication Date: 14.02.2019 International Filing Date: 06.08.2018
IPC:
G01N 29/24 (2006.01) ,G01H 9/00 (2006.01) ,G01N 21/17 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29
Investigating 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
22
Details
24
Probes
G PHYSICS
01
MEASURING; TESTING
H
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
9
Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
Applicants:
ELBIT SYSTEMS LAND AND C4I LTD. [IL/IL]; 5 Hagavish St. 4250705 Netanya, IL
Inventors:
LEIZERSON, Ilya; IL
ALFASSI, Barak; IL
HEIMER, Alon; IL
ALONI, Sharone; IL
WOLFF, Adam; IL
Agent:
WEILER, Assaf; PEARL COHEN ZEDEK LATZER BARATZ P.O. Box 7198 6107121 Tel Aviv, IL
WEILER, Assaf; IL
Priority Data:
25386206.08.2017IL
Title (EN) PHOTOACOUSTIC EXCITATION SENSING ENHANCED BY CROSS-CORRELATED UNFOCUSED SPECKLE IMAGES
(FR) DÉTECTION D'EXCITATION PHOTOACOUSTIQUE AMÉLIORÉE PAR DES IMAGES DE TAVELURE NON FOCALISÉES CORRÉLÉES
Abstract:
(EN) A method and a system for photoacoustic inspection of a part are provided herein. The method may include the following steps: photo-acoustically exciting a predetermined position in a predetermined region on a part by pulsed laser illumination, to yield ultrasonic excitation of the part; coherently illuminating a predetermined location in the predetermined region on the part; detecting an illumination scattered from the predetermined location; determining, based on the scattered illumination, a plurality of sequence of two or more temporally-sequential de-focused speckle pattern images, wherein each of the sequences corresponds to one of the predetermined illuminated locations; and determining a set of translations, each determined based on the sequences, wherein each translation in the set is determined based on two temporally-sequential speckle patterns images in the respective sequence.
(FR) La présente invention concerne un procédé et un système d'inspection photoacoustique d'une pièce. Le procédé peut comprendre les étapes consistant à : exciter de manière photoacoustique une position prédéterminée dans une région prédéterminée sur une pièce par un éclairage laser pulsé, pour produire une excitation ultrasonore de la pièce; éclairer de manière cohérente un emplacement prédéterminé dans la région prédéterminée sur la pièce; détecter un éclairage diffusé à partir de l'emplacement prédéterminé; déterminer, sur la base de l'éclairage diffusé, une pluralité de séquences d'au moins deux images de tavelure défocalisées temporellement séquentielles, chacune des séquences correspondant à l'un des emplacements éclairés prédéterminés; et déterminer un ensemble de translations, chaque translation étant déterminée sur la base des séquences, chaque translation dans l'ensemble étant déterminée sur la base de deux images de tavelure temporellement séquentielles dans la séquence respective.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)