JPS56111463A - Ultrasonic-wave flaw detecting method for weld part - Google Patents

Ultrasonic-wave flaw detecting method for weld part

Info

Publication number
JPS56111463A
JPS56111463A JP1407780A JP1407780A JPS56111463A JP S56111463 A JPS56111463 A JP S56111463A JP 1407780 A JP1407780 A JP 1407780A JP 1407780 A JP1407780 A JP 1407780A JP S56111463 A JPS56111463 A JP S56111463A
Authority
JP
Japan
Prior art keywords
signal
weld zone
ultrasonic
probes
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.)
Pending
Application number
JP1407780A
Other languages
Japanese (ja)
Inventor
Toshio Kurahashi
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 JP1407780A priority Critical patent/JPS56111463A/en
Publication of JPS56111463A publication Critical patent/JPS56111463A/en
Pending 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
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4445—Classification of defects
    • 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
    • G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
    • G01N29/0609—Display arrangements, e.g. colour displays
    • G01N29/0618—Display arrangements, e.g. colour displays synchronised with scanning, e.g. in real-time
    • 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
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
    • 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
    • G01N2291/26—Scanned objects
    • G01N2291/267—Welds
    • G01N2291/2675—Seam, butt welding

Abstract

PURPOSE:To perform flaw detection of high precision with simple comstitution by permitting ultrasonic-wave probes provided in parallel in the direction of the width of a weld zone and slidable along the weld zone to make a judgement corresponding to the magnitude of a received defective echo from a prescribed area and its frequency. CONSTITUTION:Ultrasonic-wave probes 3... provided under the water in a container in parallel in the width direction of weld zone 2 are moved along weld zone 2. Received defective echoes from those probes 3... are passed through gate circuits 11... whose open times are set previously to obtain defective echo signal from areas assigned to probes 3..., and flaw discriminating circuit 12... remove low-level noise inputs. Next, flaw-grade discriminating circuit 13 generates signal h1 corresponding to the size of a defect by a comparison with a set value. Frequency n1 of the generation of this signal h1 is counted by counting circuit 15 and arithmetic circuit 14 calculates a discrimination signal corresponding to the size of the defective signal and the frequency of the generation based upon the formula in the figure. Therefore, the spread of the defect, etc., is detected by the relatively simple constitution with high precision. Here, S is unit time.
JP1407780A 1980-02-07 1980-02-07 Ultrasonic-wave flaw detecting method for weld part Pending JPS56111463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1407780A JPS56111463A (en) 1980-02-07 1980-02-07 Ultrasonic-wave flaw detecting method for weld part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1407780A JPS56111463A (en) 1980-02-07 1980-02-07 Ultrasonic-wave flaw detecting method for weld part

Publications (1)

Publication Number Publication Date
JPS56111463A true JPS56111463A (en) 1981-09-03

Family

ID=11851039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1407780A Pending JPS56111463A (en) 1980-02-07 1980-02-07 Ultrasonic-wave flaw detecting method for weld part

Country Status (1)

Country Link
JP (1) JPS56111463A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125635A2 (en) * 1983-05-12 1984-11-21 Hitachi, Ltd. Method of selecting composite reception signal in ultrasonic inspection apparatus and apparatus therefor
JP2008518239A (en) * 2005-12-16 2008-05-29 ビ−エイイ− システムズ パブリック リミテッド カンパニ− Defect detection of welded structures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125635A2 (en) * 1983-05-12 1984-11-21 Hitachi, Ltd. Method of selecting composite reception signal in ultrasonic inspection apparatus and apparatus therefor
JP2008518239A (en) * 2005-12-16 2008-05-29 ビ−エイイ− システムズ パブリック リミテッド カンパニ− Defect detection of welded structures
JP4773459B2 (en) * 2005-12-16 2011-09-14 ビ−エイイ− システムズ パブリック リミテッド カンパニ− Defect detection of welded structures

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