JPS6486059A - Ultrasonic measurement system - Google Patents

Ultrasonic measurement system

Info

Publication number
JPS6486059A
JPS6486059A JP62242541A JP24254187A JPS6486059A JP S6486059 A JPS6486059 A JP S6486059A JP 62242541 A JP62242541 A JP 62242541A JP 24254187 A JP24254187 A JP 24254187A JP S6486059 A JPS6486059 A JP S6486059A
Authority
JP
Japan
Prior art keywords
defect
value
control section
component values
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62242541A
Other languages
Japanese (ja)
Other versions
JPH0830698B2 (en
Inventor
Shoji Yamaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP62242541A priority Critical patent/JPH0830698B2/en
Publication of JPS6486059A publication Critical patent/JPS6486059A/en
Publication of JPH0830698B2 publication Critical patent/JPH0830698B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To discriminate features measured of a defect, by measuring the intensity of two frequency components respectively above and below a peak frequency value within a frequency band of a received reflected wave. CONSTITUTION:A focus converging type ultrasonic probe 3 of an ultrasonic inspection mechanism 21 moves in directions X and Y with a scanner 4 under the control of an ultrasonic inspection mechanism control section 22 to scan an object 2 to be inspected. A pulse receiver 10 of the control section 22 receives a signal from the probe 3 to display a received waveform thereof on an oscilloscope 11 while being sent to an image processor 23 via a gate circuit 12 and an A/D converter 14. A microprocessor 15 of the device 23 performs a Fourier transform of an input signal to extract two frequency component values respectively above and below a peak frequency value. Then, a difference between the component values or the sum thereof is determined. The value thus obtained varies with the form of a defect, thereby enabling discrimination of features of a defect.
JP62242541A 1987-09-29 1987-09-29 Ultrasonic measurement method Expired - Lifetime JPH0830698B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62242541A JPH0830698B2 (en) 1987-09-29 1987-09-29 Ultrasonic measurement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62242541A JPH0830698B2 (en) 1987-09-29 1987-09-29 Ultrasonic measurement method

Publications (2)

Publication Number Publication Date
JPS6486059A true JPS6486059A (en) 1989-03-30
JPH0830698B2 JPH0830698B2 (en) 1996-03-27

Family

ID=17090642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62242541A Expired - Lifetime JPH0830698B2 (en) 1987-09-29 1987-09-29 Ultrasonic measurement method

Country Status (1)

Country Link
JP (1) JPH0830698B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167465A (en) * 1988-12-21 1990-06-27 Ngk Insulators Ltd Ultrasonic flaw inspecting method
JPH05333000A (en) * 1992-05-28 1993-12-17 Nippon Steel Corp Ultrasonic flaw detector

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002323481A (en) * 2001-04-27 2002-11-08 Kawasaki Steel Corp Ultrasonic flaw detection method and device
JP4526046B1 (en) 2010-01-21 2010-08-18 株式会社Ｉｈｉ検査計測 Inspection method using guide waves
JP4475477B1 (en) * 2010-01-22 2010-06-09 株式会社Ｉｈｉ検査計測 Inspection method using guide waves

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167465A (en) * 1988-12-21 1990-06-27 Ngk Insulators Ltd Ultrasonic flaw inspecting method
JPH05333000A (en) * 1992-05-28 1993-12-17 Nippon Steel Corp Ultrasonic flaw detector

Also Published As

Publication number Publication date
JPH0830698B2 (en) 1996-03-27

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