JPS57187609A - Measuring device for decrease in wall thickness - Google Patents

Measuring device for decrease in wall thickness

Info

Publication number
JPS57187609A
JPS57187609A JP7200881A JP7200881A JPS57187609A JP S57187609 A JPS57187609 A JP S57187609A JP 7200881 A JP7200881 A JP 7200881A JP 7200881 A JP7200881 A JP 7200881A JP S57187609 A JPS57187609 A JP S57187609A
Authority
JP
Japan
Prior art keywords
wave
time
wall thickness
sending
waves
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
JP7200881A
Other languages
Japanese (ja)
Other versions
JPS6316685B2 (en
Inventor
Kazumichi Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7200881A priority Critical patent/JPS57187609A/en
Publication of JPS57187609A publication Critical patent/JPS57187609A/en
Publication of JPS6316685B2 publication Critical patent/JPS6316685B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE:To reduce scanning by a wave sending and receiving device and detect minimum wall thickness and its position in a short time by sending a surface wave to an object to be measured and making its frequency gradually larger and detecting the time for the wave to reach a wave receiving device through a reduced wall thickness portion or the time for the reflected wave to reach the wave receiving device. CONSTITUTION:Continuous sine waves from an oscillator 10 become pulse-type sine waves at a gate circuit 11 by means of a trigger pulse generated in a micro-processor (MP) 9, and they are applied to a wave sending and receiving unit 3 via an amplifier 12. The surface waves are received by a receiver 5, and its signal is input to a counter 19 through an amplifier 17 and a pulse shaper 18, and the clock pulse from a pulse generator 13 is counted. The value of the counting for the time (tau) from oscillation of the surface waves to the time of receiving them is stored in the MP9. When it falls within a specified value by changing the frequency (f), the thickness of a part 2 where wall thickness is reduced is calculated. The waves reflected from the part 2 are detected at the waqve sending and receiving unit 3 and from the going and returning time of surface waves detected in the same way the position of the part 2 is detected.
JP7200881A 1981-05-13 1981-05-13 Measuring device for decrease in wall thickness Granted JPS57187609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7200881A JPS57187609A (en) 1981-05-13 1981-05-13 Measuring device for decrease in wall thickness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7200881A JPS57187609A (en) 1981-05-13 1981-05-13 Measuring device for decrease in wall thickness

Publications (2)

Publication Number Publication Date
JPS57187609A true JPS57187609A (en) 1982-11-18
JPS6316685B2 JPS6316685B2 (en) 1988-04-11

Family

ID=13476949

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7200881A Granted JPS57187609A (en) 1981-05-13 1981-05-13 Measuring device for decrease in wall thickness

Country Status (1)

Country Link
JP (1) JPS57187609A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002005905A (en) * 2000-06-23 2002-01-09 Idemitsu Eng Co Ltd Inspection method of thinning wall or the like by surface wave and inspection device therefor
EP1959229A1 (en) * 2007-02-19 2008-08-20 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Ultrasonic surface monitoring
JP2018205185A (en) * 2017-06-06 2018-12-27 日立Ｇｅニュークリア・エナジー株式会社 Ultrasonic inspection method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2501007C2 (en) * 2008-07-22 2013-12-10 Недерландсе Органистати Вор Тугепаст-Натюрветенсхаппелейк Ондерзук Тно Corrosion monitoring

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002005905A (en) * 2000-06-23 2002-01-09 Idemitsu Eng Co Ltd Inspection method of thinning wall or the like by surface wave and inspection device therefor
EP1959229A1 (en) * 2007-02-19 2008-08-20 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Ultrasonic surface monitoring
WO2008103036A1 (en) 2007-02-19 2008-08-28 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Ultrasonic surface monitoring
JP2010519509A (en) * 2007-02-19 2010-06-03 ネーデルランデ オルガニサチエ ヴォール トエゲパスト−ナツールウェテンスハペリエク オンデルゾエク ティーエヌオー Ultrasonic surface monitoring method
US8583407B2 (en) 2007-02-19 2013-11-12 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Ultrasonic surface monitoring
JP2018205185A (en) * 2017-06-06 2018-12-27 日立Ｇｅニュークリア・エナジー株式会社 Ultrasonic inspection method

Also Published As

Publication number Publication date
JPS6316685B2 (en) 1988-04-11

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