JPS56112646A - Multichannel as monitor - Google Patents

Multichannel as monitor

Info

Publication number
JPS56112646A
JPS56112646A JP1544680A JP1544680A JPS56112646A JP S56112646 A JPS56112646 A JP S56112646A JP 1544680 A JP1544680 A JP 1544680A JP 1544680 A JP1544680 A JP 1544680A JP S56112646 A JPS56112646 A JP S56112646A
Authority
JP
Japan
Prior art keywords
signal
arrival
generating source
signals
constitution
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
JP1544680A
Other languages
Japanese (ja)
Inventor
Hirokazu Sato
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 JP1544680A priority Critical patent/JPS56112646A/en
Publication of JPS56112646A publication Critical patent/JPS56112646A/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
    • 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

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)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To enable measurement whereover the position of an AE generating source is located by processing the output signal of an AE sensor near to the AE generating source and thereby performing locating operation of the position, evaluation of soundness, etc. CONSTITUTION:An arriving time difference measuring circuit C1 discriminates the sequence of arrival of each AE signal received by the AE sensors S1-Sn and measures the difference in the time of arrival between the 1st arrival signal and the other arrival signals. In addition, the outputs of the AE sensors S1-Sn are impressed on an AE signal selecting circuit C3 through the intermediary of delay circuits D1-Dn, and by an AE signal selecting signal S, required numbers of signals in precedence starting from the 1st arrival signal are delivered. And, an AE processing device C2 conducts locating operation of the position of the AE generating source according to time differences T1-2, T1-3 and T1-4, measuring the peak value, duration, etc. of the AE signals AE1-AE4. By this constitution, measurement of the peak value and the like by the output of the AE sensor near to the AE generating source is made possible and thereby uncertainty due to attenuation of AE wave can be avoided.
JP1544680A 1980-02-13 1980-02-13 Multichannel as monitor Pending JPS56112646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1544680A JPS56112646A (en) 1980-02-13 1980-02-13 Multichannel as monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1544680A JPS56112646A (en) 1980-02-13 1980-02-13 Multichannel as monitor

Publications (1)

Publication Number Publication Date
JPS56112646A true JPS56112646A (en) 1981-09-05

Family

ID=11889027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1544680A Pending JPS56112646A (en) 1980-02-13 1980-02-13 Multichannel as monitor

Country Status (1)

Country Link
JP (1) JPS56112646A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104360310A (en) * 2014-12-03 2015-02-18 吉林大学 Multi-objective and near-field source locating method and multi-objective and near-field source locating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104360310A (en) * 2014-12-03 2015-02-18 吉林大学 Multi-objective and near-field source locating method and multi-objective and near-field source locating device
CN104360310B (en) * 2014-12-03 2017-06-27 吉林大学 A kind of multiple target near-field sources localization method and apparatus

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