JPS573041A - Ultrasonic flaw detector - Google Patents

Ultrasonic flaw detector

Info

Publication number
JPS573041A
JPS573041A JP7728380A JP7728380A JPS573041A JP S573041 A JPS573041 A JP S573041A JP 7728380 A JP7728380 A JP 7728380A JP 7728380 A JP7728380 A JP 7728380A JP S573041 A JPS573041 A JP S573041A
Authority
JP
Japan
Prior art keywords
circuit
signal
shape
pulses
specimen
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
JP7728380A
Other languages
Japanese (ja)
Other versions
JPS6337902B2 (en
Inventor
Naohiko Miura
Mitsuhiro Koike
Takuo Yasuhara
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7728380A priority Critical patent/JPS573041A/en
Publication of JPS573041A publication Critical patent/JPS573041A/en
Publication of JPS6337902B2 publication Critical patent/JPS6337902B2/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
    • G01N29/04—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
    • G01N29/36—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
    • 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
    • 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
    • G01N2291/10—Number of transducers
    • G01N2291/101—Number of transducers one transducer

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)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To detect the presence or not of any defect easily by making the shape signal of a specimen from the reflected wave signal outputted from a gate circuit and subtracting the shape signal from the reflected wave signal. CONSTITUTION:When an oscillating circuit 9 generates pulses, a pulse generating circuit 10 generates pulses, by which pulses a radio transmitting and receiving vibrator 1a generates ultrasonic waves. The ultrasonic waves enter a specimen 2. On the other hand, the pulses of the circuit 9 are applied to a gate circuit 14 as well. The gated receiving signal is stored in a storage circuit 18 by a storage circuit control circuit 17. A shape signal generating circuit 16 makes the shape signal corresponding to the shape of the specimen 2 from the receiving signal and stores the same in a storage circuit 19. The content of the circuit 19 is subtracted from the content of the circuit 18 by a subtractor 20, and the result of the subtraction is fed together with the scanning signals generated by a position signal generator 12 and a scanning signal generator 11, to a display device 21, and at the same time, the presence of any defect or not is decided in a defect decision circuit 22.
JP7728380A 1980-06-09 1980-06-09 Ultrasonic flaw detector Granted JPS573041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7728380A JPS573041A (en) 1980-06-09 1980-06-09 Ultrasonic flaw detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7728380A JPS573041A (en) 1980-06-09 1980-06-09 Ultrasonic flaw detector

Publications (2)

Publication Number Publication Date
JPS573041A true JPS573041A (en) 1982-01-08
JPS6337902B2 JPS6337902B2 (en) 1988-07-27

Family

ID=13629532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7728380A Granted JPS573041A (en) 1980-06-09 1980-06-09 Ultrasonic flaw detector

Country Status (1)

Country Link
JP (1) JPS573041A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5188033A (en) * 1975-01-30 1976-08-02
JPS61155856A (en) * 1984-12-28 1986-07-15 Toshiba Corp Ultrasonic flaw inspector
JP2012047512A (en) * 2010-08-25 2012-03-08 Jfe Steel Corp Inspection method and inspection equipment of tooth part

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0569501U (en) * 1992-02-21 1993-09-21 株式会社ホクシン Charcoal stove for leisure
JPH07100073A (en) * 1993-09-09 1995-04-18 Nippon Tanzou Kk Roaster

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5188033A (en) * 1975-01-30 1976-08-02
JPS61155856A (en) * 1984-12-28 1986-07-15 Toshiba Corp Ultrasonic flaw inspector
JP2012047512A (en) * 2010-08-25 2012-03-08 Jfe Steel Corp Inspection method and inspection equipment of tooth part

Also Published As

Publication number Publication date
JPS6337902B2 (en) 1988-07-27

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