JPS57179746A - Monitoring device for fatigue degree of structure - Google Patents

Monitoring device for fatigue degree of structure

Info

Publication number
JPS57179746A
JPS57179746A JP56065971A JP6597181A JPS57179746A JP S57179746 A JPS57179746 A JP S57179746A JP 56065971 A JP56065971 A JP 56065971A JP 6597181 A JP6597181 A JP 6597181A JP S57179746 A JPS57179746 A JP S57179746A
Authority
JP
Japan
Prior art keywords
wave
pipe
ultrasonic wave
fatigue
supplied
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
JP56065971A
Other languages
Japanese (ja)
Inventor
Nobuo Uesugi
Kazuhiro Tsumura
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 JP56065971A priority Critical patent/JPS57179746A/en
Publication of JPS57179746A publication Critical patent/JPS57179746A/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
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4454—Signal recognition, e.g. specific values or portions, signal events, signatures
    • 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
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • 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
    • G01N2291/025—Change of phase or condition
    • G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
    • 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
    • G01N2291/0289—Internal structure, e.g. defects, grain size, texture

Landscapes

  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To detect a fault of a structure before cracks, etc. are caused in a structure, by carrying out monitor for the degree of fatigue of the structure such as a piping in a plant by making use of the transmission properties of ultrasonic wave. CONSTITUTION:The clock is supplied to a wave transmission driving circuit 2 from a clock signal generator 1, and the circuit 2 applies the high voltage pulse signal to a wave transmitter 3. The ultrasonic wave given from the transmitter 3 is transmitted to an end of a bent pipe 4. This ultrasonic wave propagates at the inside of the pipe 4 and reaches a wave receiver 5 set at the other end of the pipe 4 to be converted into an electric signal. This electric signal is supplied to a time measuring device 7 and a peak detector 8 via an amplifier 6. Then the propagation time of the ultrasonic wave which is measured by the device 7 plus the peak value of the wave receiving signal detected by the detector 8 are supplied to a fatigue deciding device 9 to decide the fatigue degree of the pipe 4. In such a way, the effect of ambient noises, etc. is reduced to ensure monitor with high accuracy.
JP56065971A 1981-04-30 1981-04-30 Monitoring device for fatigue degree of structure Pending JPS57179746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56065971A JPS57179746A (en) 1981-04-30 1981-04-30 Monitoring device for fatigue degree of structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56065971A JPS57179746A (en) 1981-04-30 1981-04-30 Monitoring device for fatigue degree of structure

Publications (1)

Publication Number Publication Date
JPS57179746A true JPS57179746A (en) 1982-11-05

Family

ID=13302388

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56065971A Pending JPS57179746A (en) 1981-04-30 1981-04-30 Monitoring device for fatigue degree of structure

Country Status (1)

Country Link
JP (1) JPS57179746A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63186122A (en) * 1987-01-28 1988-08-01 Power Reactor & Nuclear Fuel Dev Corp Abnormality diagnosing system for structure
JPH06345112A (en) * 1993-06-11 1994-12-20 Kitapura:Kk Liquid container made of synthetic resin
CN103792291A (en) * 2012-10-31 2014-05-14 波音公司 Apparatus and method for measuring in-plane elastic constants for laminate plate

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216284A (en) * 1975-07-28 1977-02-07 Mitsubishi Heavy Ind Ltd Detecting method of fatigue
JPS53120585A (en) * 1977-03-30 1978-10-21 Toshiba Corp Remaining life measuring method of metal materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216284A (en) * 1975-07-28 1977-02-07 Mitsubishi Heavy Ind Ltd Detecting method of fatigue
JPS53120585A (en) * 1977-03-30 1978-10-21 Toshiba Corp Remaining life measuring method of metal materials

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63186122A (en) * 1987-01-28 1988-08-01 Power Reactor & Nuclear Fuel Dev Corp Abnormality diagnosing system for structure
JPH0511895B2 (en) * 1987-01-28 1993-02-16 Doryokuro Kakunenryo Kaihatsu Jigyodan
JPH06345112A (en) * 1993-06-11 1994-12-20 Kitapura:Kk Liquid container made of synthetic resin
CN103792291A (en) * 2012-10-31 2014-05-14 波音公司 Apparatus and method for measuring in-plane elastic constants for laminate plate
JP2014092543A (en) * 2012-10-31 2014-05-19 Boeing Co Apparatus and method for measuring in-plane elastic constants for laminate

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