JPS57141550A - Ultrasonic flaw detector - Google Patents

Ultrasonic flaw detector

Info

Publication number
JPS57141550A
JPS57141550A JP56027185A JP2718581A JPS57141550A JP S57141550 A JPS57141550 A JP S57141550A JP 56027185 A JP56027185 A JP 56027185A JP 2718581 A JP2718581 A JP 2718581A JP S57141550 A JPS57141550 A JP S57141550A
Authority
JP
Japan
Prior art keywords
pulse
echo
reflected
echo pulse
signal
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
JP56027185A
Other languages
Japanese (ja)
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 JP56027185A priority Critical patent/JPS57141550A/en
Publication of JPS57141550A publication Critical patent/JPS57141550A/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
    • G01N29/22—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
    • 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
    • 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
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/341—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with time characteristics
    • G01N29/343—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with time characteristics pulse waves, e.g. particular sequence of pulses, bursts
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To hold the ultrasonic flaw detecting region almost over the entire width of a welded area in a constant way and to increase the accuracy of flaw detection, by using an automatic sensitivity controller to increase the detected prescribed echo with a desired level regardless of the presence or absence of a defect of a subject to be inspected. CONSTITUTION:The ultrasonic pulse signal is applied to a probe 3 for oblique angle of ultrasonic wave, and the transmitting pulse is made incident to a welded part 31 from point M on the outer circumference surface of a steel pipe 30 and reflected at the bead shoulder part N of the opposite side to be converted into the electric signal by the probe 3. The transmitted pulse signal is led to an automatic sensitivity controller 5 along with the defective echo pulse reflected by the defect of the part 31 plus the defective echo pulse reflected from the part N. These pulses are amplified by the controller 5 and supplied to a gate circuit 6. Then the signal with its disturbance echo pulse eliminated is supplied to an A/D converter 7 to convert the time from the transmitted pulse to the echo pulse, the intensity of the defective echo pulse, etc. into the digital data. This data is recorded and displayed to a recorder 8.
JP56027185A 1981-02-25 1981-02-25 Ultrasonic flaw detector Pending JPS57141550A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56027185A JPS57141550A (en) 1981-02-25 1981-02-25 Ultrasonic flaw detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56027185A JPS57141550A (en) 1981-02-25 1981-02-25 Ultrasonic flaw detector

Publications (1)

Publication Number Publication Date
JPS57141550A true JPS57141550A (en) 1982-09-01

Family

ID=12214010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56027185A Pending JPS57141550A (en) 1981-02-25 1981-02-25 Ultrasonic flaw detector

Country Status (1)

Country Link
JP (1) JPS57141550A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258162A (en) * 1985-09-06 1987-03-13 Mazda Motor Corp Method for inspecting welded part
KR100438373B1 (en) * 2002-03-12 2004-07-03 케이엔디티앤아이 주식회사 Apparatus for ultrasonic inspection of electrofusion joints for polyethylene pipes for a portable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258162A (en) * 1985-09-06 1987-03-13 Mazda Motor Corp Method for inspecting welded part
KR100438373B1 (en) * 2002-03-12 2004-07-03 케이엔디티앤아이 주식회사 Apparatus for ultrasonic inspection of electrofusion joints for polyethylene pipes for a portable

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