JPS57144458A - Ultrasonic flaw detector - Google Patents

Ultrasonic flaw detector

Info

Publication number
JPS57144458A
JPS57144458A JP56030776A JP3077681A JPS57144458A JP S57144458 A JPS57144458 A JP S57144458A JP 56030776 A JP56030776 A JP 56030776A JP 3077681 A JP3077681 A JP 3077681A JP S57144458 A JPS57144458 A JP S57144458A
Authority
JP
Japan
Prior art keywords
pulses
weld
probe
echo pulses
parasitic
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
JP56030776A
Other languages
Japanese (ja)
Other versions
JPS6342744B2 (en
Inventor
Shigeaki Matsumoto
Toshio Shiraiwa
Hisao 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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP56030776A priority Critical patent/JPS57144458A/en
Publication of JPS57144458A publication Critical patent/JPS57144458A/en
Publication of JPS6342744B2 publication Critical patent/JPS6342744B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—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
    • G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/40—Detecting the response signal, e.g. electronic circuits specially adapted therefor by amplitude filtering, e.g. by applying a threshold or by gain control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—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
    • G01N29/04—Analysing solids
    • G01N29/11—Analysing solids by measuring attenuation of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2487—Directing probes, e.g. angle probes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02854—Length, thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/056—Angular incidence, angular propagation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/263—Surfaces
    • G01N2291/2634—Surfaces cylindrical from outside
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/267—Welds
    • G01N2291/2675—Seam, butt welding

Abstract

PURPOSE:To improve the reliability of flaw detection of weld zones by allowing a probe to follow up and trace the weld zone with high accuracy by making effective use of the parasitic echoes obtained from the shoulder parts of weld beads. CONSTITUTION:The ultrasonic signal from a high voltage pulse generator 2 controlled by a synchronizing signal generator 1 is made incident toward the weld zone 31 of a steel pipe 30 by means of an ultrasonic angle probe 3. Transmission pulses and echo pulses are inputted to a clocking circuit 5 via a sensitivity adjusting circuit 4, and the time intervals of the transmission pulses T and the parasitic echo pulses B reflected by the shoulder parts N of the beads are measured. The measured value thereof and the set value of a setting circuit 11 are compared in a comparator 8, and the probe 3 is controlled to trace the weld line by a controller 9 so that the difference thereof is made zero. On the other hand, in a signal processor 12, the pulses B are gated just before they are inputted whereby the passage of the parasitic echo pulses is blocked, and only the flaw echo pulses F from the weld zone 31 are recorded in a recorder 13.
JP56030776A 1981-03-03 1981-03-03 Ultrasonic flaw detector Granted JPS57144458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56030776A JPS57144458A (en) 1981-03-03 1981-03-03 Ultrasonic flaw detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56030776A JPS57144458A (en) 1981-03-03 1981-03-03 Ultrasonic flaw detector

Publications (2)

Publication Number Publication Date
JPS57144458A true JPS57144458A (en) 1982-09-07
JPS6342744B2 JPS6342744B2 (en) 1988-08-25

Family

ID=12313080

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56030776A Granted JPS57144458A (en) 1981-03-03 1981-03-03 Ultrasonic flaw detector

Country Status (1)

Country Link
JP (1) JPS57144458A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0197856A (en) * 1987-10-09 1989-04-17 Toshiba Corp Ultrasonic wave flaw detecting apparatus
KR100438373B1 (en) * 2002-03-12 2004-07-03 케이엔디티앤아이 주식회사 Apparatus for ultrasonic inspection of electrofusion joints for polyethylene pipes for a portable
KR100480966B1 (en) * 2002-10-15 2005-04-07 학교법인 성균관대학 Method and apparatus for diagnosing scale of pipe by using the guided ultrasound
JP2011106821A (en) * 2009-11-12 2011-06-02 Mitsubishi Electric Corp Welding bead measuring method of pipe material, welding bead cutting method, and welding bead cutting apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0234647U (en) * 1988-08-26 1990-03-06

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0197856A (en) * 1987-10-09 1989-04-17 Toshiba Corp Ultrasonic wave flaw detecting apparatus
KR100438373B1 (en) * 2002-03-12 2004-07-03 케이엔디티앤아이 주식회사 Apparatus for ultrasonic inspection of electrofusion joints for polyethylene pipes for a portable
KR100480966B1 (en) * 2002-10-15 2005-04-07 학교법인 성균관대학 Method and apparatus for diagnosing scale of pipe by using the guided ultrasound
JP2011106821A (en) * 2009-11-12 2011-06-02 Mitsubishi Electric Corp Welding bead measuring method of pipe material, welding bead cutting method, and welding bead cutting apparatus

Also Published As

Publication number Publication date
JPS6342744B2 (en) 1988-08-25

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