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1. (WO1998052032) METHOD FOR RESIDUAL STRESS MEASURING
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/052032 International Application No.: PCT/EP1998/003003
Publication Date: 19.11.1998 International Filing Date: 15.05.1998
Chapter 2 Demand Filed: 04.11.1998
IPC:
G01N 29/07 (2006.01) ,G01N 29/11 (2006.01) ,G01N 29/30 (2006.01) ,G01N 29/34 (2006.01) ,G01N 29/38 (2006.01) ,G01N 29/40 (2006.01) ,G01N 29/42 (2006.01) ,G01N 29/46 (2006.01) ,G01N 29/50 (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
04
Analysing solids
07
by measuring propagation velocity or propagation time of acoustic waves
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
04
Analysing solids
11
by measuring attenuation of acoustic waves
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
30
Arrangements for calibrating or comparing, e.g. with standard objects
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
34
Generating the ultrasonic, sonic or infrasonic waves
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
36
Detecting the response signal
38
by time filtering, e.g. using time gates
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
36
Detecting the response signal
40
by amplitude filtering, e.g. by applying a threshold
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
36
Detecting the response signal
42
by frequency filtering
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
44
Processing the detected response signal
46
by spectral analysis, e.g. Fourier analysis
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
44
Processing the detected response signal
50
using auto-correlation techniques or cross-correlation techniques
Applicants:
HASZLER, Alfred, Johann, Peter [AT/DE]; DE (UsOnly)
GHAZIARY, Hormoz [US/US]; US (UsOnly)
HOOGOVENS ALUMINIUM WALZPRODUKTE GMBH [DE/DE]; Carl-Spaeter-Strasse 10 D-56070 Koblenz, DE (AllExceptUS)
Inventors:
HASZLER, Alfred, Johann, Peter; DE
GHAZIARY, Hormoz; US
Agent:
HANSEN, Willem, Joseph, Maria; Hoogovens Corporate Services B.V. P.O. Box 10000 NL-1970 CA Ijmuiden, NL
Priority Data:
97201471.615.05.1997EP
Title (EN) METHOD FOR RESIDUAL STRESS MEASURING
(FR) PROCEDE DE MESURE DE CONTRAINTES RESIDUELLES
Abstract:
(EN) Method for measuring residual stress in a metallic specimen wherein, by means of an ultrasound transducer an ultrasound entry wave having a ground frequency is introduced into a surface of the metallic specimen, the ultrasound entry wave is measured by means of an entry wave detector and the succeeding ultrasound exit wave is measured by means of an exit wave detector and the measured values of the ultrasound entry and exit wave are used to determine residual stress, characterized in that, for a selected entry gate time the value of the entry convolution integral of the measured ultrasound entry wave and a periodic wave of the ground frequency is calculated and during a selected exit gate time the value of the exit convolution integral of the measured ultrasound exit wave and a periodic wave of the ground frequency is calculated and the residual stress is determined using the calculated values of the entry convolution integral and the exit convolution integral.
(FR) Cette invention se rapporte à un procédé permettant de mesurer les contraintes résiduelles dans un spécimen métallique. A cet effet, on utilise un transducteur ultrasonore pour introduire une onde d'entrée ultrasonore ayant une fréquence de terre dans une surface du spécimen métallique, on mesure l'onde d'entrée ultrasonore au moyen d'un détecteur d'onde d'entrée et on mesure l'onde de sortie ultrasonore qui en résulte au moyen d'un détecteur d'onde de sortie, puis on utilise les valeurs mesurées de l'onde d'entrée ultrasonore et de l'onde de sortie ultrasonore pour déterminer les contraintes résiduelles. Ce procédé se caractérise en ce que, pour un temps de passage d'entrée sélectionné, la valeur de l'intégrale de composition d'entrée de l'onde d'entrée ultrasonore mesurée et d'une onde périodique de la fréquence de terre est calculée et, pendant un temps de passage de sortie sélectionné, la valeur de l'intégrale de composition de sortie de l'onde de sortie ultrasonore mesurée et d'une onde périodique de la fréquence de terre est calculée, puis la contrainte résiduelle est déterminée à l'aide des valeurs calculées de l'intégrale de composition d'entrée et de l'intégrale de composition de sortie.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)