JPS57119255A - Ae wave sensing device - Google Patents

Ae wave sensing device

Info

Publication number
JPS57119255A
JPS57119255A JP517781A JP517781A JPS57119255A JP S57119255 A JPS57119255 A JP S57119255A JP 517781 A JP517781 A JP 517781A JP 517781 A JP517781 A JP 517781A JP S57119255 A JPS57119255 A JP S57119255A
Authority
JP
Japan
Prior art keywords
pulse
circuit
evo
event
certain
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
JP517781A
Other languages
Japanese (ja)
Inventor
Hirokazu Sato
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 JP517781A priority Critical patent/JPS57119255A/en
Publication of JPS57119255A publication Critical patent/JPS57119255A/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
    • G01N29/14—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 using acoustic emission techniques

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (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 make the measurement of the parameter of an AE wave shape accurate and perform more exact evaluation of defects and optimize monitoring of soundness and safety of a construction by forming an event pulse that is different from a received signal of an AE wave and selecting either one of them. CONSTITUTION:A preamplifier 4 and main amplifier 5 amplify the received signal of an AE sensor 6 and give it to envelope line treatment circuit 7 and 8. Both circuits have different time constants, and both formed envelope curve signals are given to event making circuits 9 and 10, and if they are over a certain level, an event pulse of logic ''1'' is formed and it is supplied to a pulse selecting circuit 11. If, in the circuit 11, a pulse EVo is logic ''1'' and it is over a certain pulse of a pulse EVn in a certain time after the period of the rise time of EVo, the delay signal for the pulse EVo is output to a signal handling circuit 12. As a result, the parameter of the AE wave shape can be measured accurately.
JP517781A 1981-01-19 1981-01-19 Ae wave sensing device Pending JPS57119255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP517781A JPS57119255A (en) 1981-01-19 1981-01-19 Ae wave sensing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP517781A JPS57119255A (en) 1981-01-19 1981-01-19 Ae wave sensing device

Publications (1)

Publication Number Publication Date
JPS57119255A true JPS57119255A (en) 1982-07-24

Family

ID=11603949

Family Applications (1)

Application Number Title Priority Date Filing Date
JP517781A Pending JPS57119255A (en) 1981-01-19 1981-01-19 Ae wave sensing device

Country Status (1)

Country Link
JP (1) JPS57119255A (en)

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