JPS57141551A - Noise eliminating method of ultrasonic flaw detector - Google Patents

Noise eliminating method of ultrasonic flaw detector

Info

Publication number
JPS57141551A
JPS57141551A JP56027213A JP2721381A JPS57141551A JP S57141551 A JPS57141551 A JP S57141551A JP 56027213 A JP56027213 A JP 56027213A JP 2721381 A JP2721381 A JP 2721381A JP S57141551 A JPS57141551 A JP S57141551A
Authority
JP
Japan
Prior art keywords
echo
subject
water
inspected
height
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
JP56027213A
Other languages
Japanese (ja)
Other versions
JPH0136064B2 (en
Inventor
Hiroshi Naito
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 JP56027213A priority Critical patent/JPS57141551A/en
Publication of JPS57141551A publication Critical patent/JPS57141551A/en
Publication of JPH0136064B2 publication Critical patent/JPH0136064B2/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

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)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To detect the foam or the solid matter existing in the water and to prevent an error of flaw detection, by setting a detecting gate at a proper position between the transmitting echo of ultrasonic wave and the surface echo of a subject to be inspected and measuring the height of the echo within a gate. CONSTITUTION:The ultrasonic echo signal is converted into the electric signal through a probe 2 of an ultrasonic flaw detector of water sink system or water column system. This electric signal is supplied to a receiving part 9 to measure the echo height within a gate which is provided at a proper position decided previously between the transmitting echo of ultrasonic wave and the surface of the subject to be inspected. The height 15 of the echo is compared with a prescribed decision value signal 17 at a comparing part 16 to discriminate whether a reflected echo larger than the decision value signal exists between the transmitting echo of ultrasonic wave and a subject to be inspected. Thus the foam or a solid matter existing in the water between the probe 2 and the subject 1 is detected.
JP56027213A 1981-02-26 1981-02-26 Noise eliminating method of ultrasonic flaw detector Granted JPS57141551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56027213A JPS57141551A (en) 1981-02-26 1981-02-26 Noise eliminating method of ultrasonic flaw detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56027213A JPS57141551A (en) 1981-02-26 1981-02-26 Noise eliminating method of ultrasonic flaw detector

Publications (2)

Publication Number Publication Date
JPS57141551A true JPS57141551A (en) 1982-09-01
JPH0136064B2 JPH0136064B2 (en) 1989-07-28

Family

ID=12214819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56027213A Granted JPS57141551A (en) 1981-02-26 1981-02-26 Noise eliminating method of ultrasonic flaw detector

Country Status (1)

Country Link
JP (1) JPS57141551A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62222162A (en) * 1986-03-25 1987-09-30 Hitachi Constr Mach Co Ltd Supersonic flaw detector
JP2016205858A (en) * 2015-04-16 2016-12-08 新日鐵住金株式会社 Defect inspection device and control method thereof, program, and storage medium
CN113267562A (en) * 2021-05-19 2021-08-17 复旦大学 Method for removing interference bubbles in metallurgical material water immersion ultrasonic detection

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5167180A (en) * 1974-12-09 1976-06-10 Sumitomo Metal Ind

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5167180A (en) * 1974-12-09 1976-06-10 Sumitomo Metal Ind

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62222162A (en) * 1986-03-25 1987-09-30 Hitachi Constr Mach Co Ltd Supersonic flaw detector
JP2016205858A (en) * 2015-04-16 2016-12-08 新日鐵住金株式会社 Defect inspection device and control method thereof, program, and storage medium
CN113267562A (en) * 2021-05-19 2021-08-17 复旦大学 Method for removing interference bubbles in metallurgical material water immersion ultrasonic detection

Also Published As

Publication number Publication date
JPH0136064B2 (en) 1989-07-28

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