JPS576356A - Ultrasonic flaw detection method for pipe - Google Patents

Ultrasonic flaw detection method for pipe

Info

Publication number
JPS576356A
JPS576356A JP7981680A JP7981680A JPS576356A JP S576356 A JPS576356 A JP S576356A JP 7981680 A JP7981680 A JP 7981680A JP 7981680 A JP7981680 A JP 7981680A JP S576356 A JPS576356 A JP S576356A
Authority
JP
Japan
Prior art keywords
probes
flaw detection
time
interference echoes
pipe
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
JP7981680A
Other languages
Japanese (ja)
Other versions
JPS6330578B2 (en
Inventor
Koji Kawamura
Masayoshi Usuki
Katsumi Takeda
Kazuyuki Ito
Takeshi Yagi
Yoshitaka Yoshiyama
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
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Co Ltd
Nippon Steel Corp
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 Tokyo Keiki Co Ltd, Nippon Steel Corp filed Critical Tokyo Keiki Co Ltd
Priority to JP7981680A priority Critical patent/JPS576356A/en
Publication of JPS576356A publication Critical patent/JPS576356A/en
Publication of JPS6330578B2 publication Critical patent/JPS6330578B2/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
    • G01N29/38—Detecting the response signal, e.g. electronic circuits specially adapted therefor by time filtering, e.g. using time gates
    • 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
    • G01N2291/10—Number of transducers
    • G01N2291/105—Number of transducers two or more emitters, two or more receivers

Abstract

PURPOSE:To make the interference echoes between adjacent probes practically harmless in flaw detection by mutually shifting the appearance positions of the interference echoes. CONSTITUTION:With probes 1b and 3b as well as 2b and 4b existing in positons where they do not mutually adjoin respectively as one set, the synchronizing signal from a synchronizing signal generator 10 for the probes of the other set with respect to the probes of one set is delayed by a prescribed time (t) by a delay circuit 20. The timings of excitation to the probes 1b, 3b from ultrasonic wave transmitters 31, 33 are deviated from the excitation timings to the probes 2b, 4b from ultrasonic wave transmitters 32, 34. The time td to be deviated is determined by determining the time when interference echoes appear and finding such a time when the interference echoes appear earlier than the start point of a flaw detection gate.
JP7981680A 1980-06-13 1980-06-13 Ultrasonic flaw detection method for pipe Granted JPS576356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7981680A JPS576356A (en) 1980-06-13 1980-06-13 Ultrasonic flaw detection method for pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7981680A JPS576356A (en) 1980-06-13 1980-06-13 Ultrasonic flaw detection method for pipe

Publications (2)

Publication Number Publication Date
JPS576356A true JPS576356A (en) 1982-01-13
JPS6330578B2 JPS6330578B2 (en) 1988-06-20

Family

ID=13700719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7981680A Granted JPS576356A (en) 1980-06-13 1980-06-13 Ultrasonic flaw detection method for pipe

Country Status (1)

Country Link
JP (1) JPS576356A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880563U (en) * 1981-11-27 1983-05-31 三菱電機株式会社 Ultrasonic flaw detection equipment
JPS62112057A (en) * 1985-11-11 1987-05-23 Mitsubishi Electric Corp Ultrasonic angle beam flaw inspection method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357283U (en) * 1989-08-03 1991-05-31
JP5721615B2 (en) * 2011-12-26 2015-05-20 三菱重工業株式会社 Ultrasonic flaw detector for pipe welds

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880563U (en) * 1981-11-27 1983-05-31 三菱電機株式会社 Ultrasonic flaw detection equipment
JPS62112057A (en) * 1985-11-11 1987-05-23 Mitsubishi Electric Corp Ultrasonic angle beam flaw inspection method

Also Published As

Publication number Publication date
JPS6330578B2 (en) 1988-06-20

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