GB2254425B - Defect detecting method and apparatus - Google Patents

Defect detecting method and apparatus

Info

Publication number
GB2254425B
GB2254425B GB9106933A GB9106933A GB2254425B GB 2254425 B GB2254425 B GB 2254425B GB 9106933 A GB9106933 A GB 9106933A GB 9106933 A GB9106933 A GB 9106933A GB 2254425 B GB2254425 B GB 2254425B
Authority
GB
United Kingdom
Prior art keywords
measured
defect
vibration
spectrum
detecting
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.)
Expired - Fee Related
Application number
GB9106933A
Other versions
GB2254425A (en
GB9106933D0 (en
Inventor
Kiyoshi Tsuboi
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to GB9106933A priority Critical patent/GB2254425B/en
Publication of GB9106933D0 publication Critical patent/GB9106933D0/en
Publication of GB2254425A publication Critical patent/GB2254425A/en
Application granted granted Critical
Publication of GB2254425B publication Critical patent/GB2254425B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01N29/04—Analysing solids
    • G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/025—Measuring arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/08—Shock-testing
    • 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
    • G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
    • 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
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis

Landscapes

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

Abstract

A defect detecting method for detecting whether or not an object to be measured has a defect comprises the steps of vibrating the object to be measured, picking up the vibration, and detecting that a spectrum of the characteristic vibration of the object to be measured has a portion which is separated into two peaks. Also, a defect detecting apparatus comprises vibration means 25 for vibrating an object to be measured, pick up means 27 for picking up an vibration of the object to be measured and for converting the vibration into an electric signal, and computation process and determination means 30 for receiving the electric signal from the pick up means, for analyzing a spectrum of a characteristic vibration of the object to be measured, and for determining whether the defect is present or absent depending on whether a spectrum of a defect of the object to be measured is present or absent. The type of defect is indicated by the position of extra peaks in the spectrum in the first or second order main energy peaks. <IMAGE>
GB9106933A 1991-04-03 1991-04-03 Defect detecting method and apparatus Expired - Fee Related GB2254425B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9106933A GB2254425B (en) 1991-04-03 1991-04-03 Defect detecting method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9106933A GB2254425B (en) 1991-04-03 1991-04-03 Defect detecting method and apparatus

Publications (3)

Publication Number Publication Date
GB9106933D0 GB9106933D0 (en) 1991-05-22
GB2254425A GB2254425A (en) 1992-10-07
GB2254425B true GB2254425B (en) 1995-07-05

Family

ID=10692550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9106933A Expired - Fee Related GB2254425B (en) 1991-04-03 1991-04-03 Defect detecting method and apparatus

Country Status (1)

Country Link
GB (1) GB2254425B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5476009A (en) * 1993-03-03 1995-12-19 Washington University Method and apparatus for determining material fatigue by measuring damping factors
US5425272A (en) * 1993-11-30 1995-06-20 Quatro Corporation Relative resonant frequency shifts to detect cracks
DE202009014770U1 (en) 2009-11-02 2011-07-04 Seuthe, Ulrich, 58300 Device for checking a component for damage
GB201021528D0 (en) 2010-12-20 2011-02-02 Cyclotech Ltd Hydrocyclone condition monitoring
DE102019200610A1 (en) * 2019-01-18 2020-07-23 Robert Bosch Gmbh Method for testing components, in particular injectors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139756A (en) * 1983-05-11 1984-11-14 Rolls Royce Component inspection by acoustic emission detection
GB2143036A (en) * 1983-07-08 1985-01-30 Atomic Energy Authority Uk Ultrasonic resonance for detecting changes in elastic properties
GB2195444A (en) * 1986-09-20 1988-04-07 Bio Kil Chemicals Ltd Method and apparatus for testing timbers for disconformity or decay by inducing vibrations therein
EP0274865A2 (en) * 1987-01-14 1988-07-20 Ngk Insulators, Ltd. Automatic ultrasonic testing method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139756A (en) * 1983-05-11 1984-11-14 Rolls Royce Component inspection by acoustic emission detection
GB2143036A (en) * 1983-07-08 1985-01-30 Atomic Energy Authority Uk Ultrasonic resonance for detecting changes in elastic properties
GB2195444A (en) * 1986-09-20 1988-04-07 Bio Kil Chemicals Ltd Method and apparatus for testing timbers for disconformity or decay by inducing vibrations therein
EP0274865A2 (en) * 1987-01-14 1988-07-20 Ngk Insulators, Ltd. Automatic ultrasonic testing method

Also Published As

Publication number Publication date
GB2254425A (en) 1992-10-07
GB9106933D0 (en) 1991-05-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010403