JPS5764151A - Ae monitor - Google Patents

Ae monitor

Info

Publication number
JPS5764151A
JPS5764151A JP55139892A JP13989280A JPS5764151A JP S5764151 A JPS5764151 A JP S5764151A JP 55139892 A JP55139892 A JP 55139892A JP 13989280 A JP13989280 A JP 13989280A JP S5764151 A JPS5764151 A JP S5764151A
Authority
JP
Japan
Prior art keywords
circuits
output
discriminating
signal
discrimination
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
JP55139892A
Other languages
Japanese (ja)
Inventor
Kyoichi Tatsuno
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55139892A priority Critical patent/JPS5764151A/en
Publication of JPS5764151A publication Critical patent/JPS5764151A/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
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination

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 obtain an AE monitor which has no possibility for producing errors in time difference by providing AE discriminating circuits which discriminate the beginning of the rise of AE waves. CONSTITUTION:The outputs of sensors S1-S3 are applied respectively via amplifieres 21-23, 31-33 to AE discriminating circuits 41-43, and the outputs of the circuits 41-43 are measured with a time difference measuring device 5, the results of measurement whereof are applied to a display device 7. In the circuits 41-43, the input signals are subjected to envelope detecting 8, averaging 9, and differentiating 10, 11, and an FF16 is turned of on discriminating 12 that the averaged signal exceeds the threshold value, Also, a signal is generated by the discrimination 13 that the discriminated output is positive, and a signal is generated by the discrimination 14 that the output of the differentiation 11 is positive. The FF16 is turned on by the output of the AND15 of the respectively produced signals.
JP55139892A 1980-10-08 1980-10-08 Ae monitor Pending JPS5764151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55139892A JPS5764151A (en) 1980-10-08 1980-10-08 Ae monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55139892A JPS5764151A (en) 1980-10-08 1980-10-08 Ae monitor

Publications (1)

Publication Number Publication Date
JPS5764151A true JPS5764151A (en) 1982-04-19

Family

ID=15256029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55139892A Pending JPS5764151A (en) 1980-10-08 1980-10-08 Ae monitor

Country Status (1)

Country Link
JP (1) JPS5764151A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62144011A (en) * 1985-12-18 1987-06-27 Hitachi Constr Mach Co Ltd Apparatus for measuring reflected wave signal of ultrasonic wave
JPH01292873A (en) * 1988-05-20 1989-11-27 Nec Corp Laser device oscillation frequency stabilization
JP2018084507A (en) * 2016-11-24 2018-05-31 株式会社Ｉｈｉ検査計測 Reinforcement corrosion AE detection method and equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62144011A (en) * 1985-12-18 1987-06-27 Hitachi Constr Mach Co Ltd Apparatus for measuring reflected wave signal of ultrasonic wave
JPH01292873A (en) * 1988-05-20 1989-11-27 Nec Corp Laser device oscillation frequency stabilization
JP2018084507A (en) * 2016-11-24 2018-05-31 株式会社Ｉｈｉ検査計測 Reinforcement corrosion AE detection method and equipment

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