JPS5723853A - Acoustic emission crack detector - Google Patents

Acoustic emission crack detector

Info

Publication number
JPS5723853A
JPS5723853A JP9752680A JP9752680A JPS5723853A JP S5723853 A JPS5723853 A JP S5723853A JP 9752680 A JP9752680 A JP 9752680A JP 9752680 A JP9752680 A JP 9752680A JP S5723853 A JPS5723853 A JP S5723853A
Authority
JP
Japan
Prior art keywords
processing circuit
signal processing
signal
detector
output signal
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
JP9752680A
Other languages
English (en)
Inventor
Takao Yoneyama
Ichiya Satou
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 JP9752680A priority Critical patent/JPS5723853A/ja
Publication of JPS5723853A publication Critical patent/JPS5723853A/ja
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
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2693—Rotor or turbine parts

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)
JP9752680A 1980-07-18 1980-07-18 Acoustic emission crack detector Pending JPS5723853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9752680A JPS5723853A (en) 1980-07-18 1980-07-18 Acoustic emission crack detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9752680A JPS5723853A (en) 1980-07-18 1980-07-18 Acoustic emission crack detector

Publications (1)

Publication Number Publication Date
JPS5723853A true JPS5723853A (en) 1982-02-08

Family

ID=14194688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9752680A Pending JPS5723853A (en) 1980-07-18 1980-07-18 Acoustic emission crack detector

Country Status (1)

Country Link
JP (1) JPS5723853A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6349625A (ja) * 1986-08-20 1988-03-02 Matsushita Electric Ind Co Ltd 燃焼制御装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6349625A (ja) * 1986-08-20 1988-03-02 Matsushita Electric Ind Co Ltd 燃焼制御装置

Similar Documents

Publication Publication Date Title
JPS55138634A (en) Fault diagnosis apparatus of apparatus
JPS5277920A (en) Misfire detector
JPS57169767A (en) Jam detecting device for copying machine
KR860001638A (ko) 펄스형 간섭 검출 및 억압회로 장치
FR2438301A1 (fr) Circuit de detection de signaux d'un capteur magnetique
JPS5723853A (en) Acoustic emission crack detector
ATE291257T1 (de) Verfahren und anlage für qrs-dektektion
JPS5644255A (en) Sound switch
JPS54155561A (en) Position detector for elevator
JPS5654359A (en) Abnormality detecting method in vehicle speed measurement
JPS5244588A (en) Disturbance detection system
JPS5739367A (en) Video signal normalizing circuit of sonar device
JPS54104883A (en) Bearing abnormality detecting device
JPS57181236A (en) Waveform amplification detecting system
JPS56168519A (en) Detecting method for damage of sun gear
JPS56168520A (en) Detecting method for damage of planetary gear
JPS5526413A (en) Waveform analyzing unit
JPS56168521A (en) Detecting method for damage of planetary gear
JPS57142523A (en) Flame detector
JPS57114846A (en) Detecting apparatus for abnormal sound
JPS5764128A (en) Loose parts monitor
JPS5522144A (en) Automatic judging device
JPS5485784A (en) Acoustic emission measureing apparatus
JPS5713324A (en) Abnormal sound monitor for rotary machine
SU896568A1 (ru) Способ обнаружени развивающихс дефектов и устройство дл его осуществлени