Title:
ULTRASONIC FLAW DETECTION METHOD USING RAYLEIGH WAVES AND APPARATUS THEREFOR
Document Type and Number:
Japanese Patent JP3782410
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detection method using Rayleigh waves for the purpose of detecting a smaller flaw or flaw shape because the height of a flaw capable of being measured by a TOFD method noticed as a new inspection method is about three times a wavelength.
SOLUTION: Part of ultrasonic waves, which enter one end of a flaw, among ultrasonic waves received by a receiving ultrasonic probe, is converted in mode to be propagated along the inner surface of the flaw as Rayleigh surface waves and part of the Rayleigh surface waves is converted again in mode at the end of the flaw to detect the ultrasonic waves re-radiated to the inside of an object to evaluate the flaw on the basis of the detection signal. By measuring and calculating the flaw using Rayleigh waves propagated along the surface of the internally present flaw, even the height dimension of the flaw smaller than before can be measured and the shape or the like of the flaw can be also evaluated.
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Inventors:
Hanedano
Hideaki Tanaka
Hideaki Tanaka
Application Number:
JP2003304012A
Publication Date:
June 07, 2006
Filing Date:
August 28, 2003
Export Citation:
Assignee:
Hanedano
Japan Steel Works, Ltd.
Japan Steel Works, Ltd.
International Classes:
G01N29/04; G01N29/00; G01N29/22; G01N29/44; (IPC1-7): G01N29/04; G01N29/18; G01N29/22
Domestic Patent References:
| JP5264515A | ||||
| JP4060454A | ||||
| JP7181170A | ||||
| JP64031048A | ||||
| JP61122562A | ||||
| JP2002131289A |
Attorney, Agent or Firm:
Yuki Yokoi
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