DK576484A - NON-DESTRUCTIVE TEST METHOD WITH ANIMALS AND FREQUENCY SWEEP SYSTEM - Google Patents

NON-DESTRUCTIVE TEST METHOD WITH ANIMALS AND FREQUENCY SWEEP SYSTEM Download PDF

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Publication number
DK576484A
DK576484A DK576484A DK576484A DK576484A DK 576484 A DK576484 A DK 576484A DK 576484 A DK576484 A DK 576484A DK 576484 A DK576484 A DK 576484A DK 576484 A DK576484 A DK 576484A
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DK
Denmark
Prior art keywords
measurement
frequency
measuring
signal
probe
Prior art date
Application number
DK576484A
Other languages
Danish (da)
Other versions
DK576484D0 (en
Inventor
Gerard Durou
Rock Samson
Original Assignee
Electromec Division Maritime
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 Electromec Division Maritime filed Critical Electromec Division Maritime
Publication of DK576484D0 publication Critical patent/DK576484D0/en
Publication of DK576484A publication Critical patent/DK576484A/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals

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  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Electrochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1. Non-destructive test device using eddy currents comprising : a sinusoidal generator (4, 5, 8) supplying an excitation signal at a certain adjustable frequency, a probe (11) comprising a winding (43, 46) capable of receiving a part to be tested, this winding receiving the said excitation signal, this probe supplying a measurement signal at the said frequency, means (12, 13, 14) for measuring the phase difference between the excitation signal and the measurement signal, means (17) for measuring the amplitude of the measurement signal, characterized in that it furthermore comprises : an analog/digital converter (2) having an input connected to the phase detector (12, 13, 14) and to the amplitude measuring means (17), a microcomputer (1) connected to the converter (2) and to the sinusoidal generator (5) and associated with means of display control (33, 34, 35, 36), this microcomputer being capable, with an appropriate operating software, of : modifying the frequency of the signal generated by the sinusoidal generator (5) in order to scan a certain frequency range, sampling the signals delivered by the means (12, 13, 14) of measuring the phase difference and the means (12) of measuring the amplitude of the signal, this sampling being carried out at different values of the frequency of the signal generated by the generator, storing all of these samples for the entire scanned range both for a first measurement, called the reference measurement, carried out by placing a reference part in the probe, and for a second measurement, called the test measurement, carried out by placing a test piece in the probe, this test piece having a certain parameter to be evaluated, determining the frequency in the scanned range at which the reference measurement and the test measurement exhibit the greatest difference, possibly repeating this determination for other test pieces having other types of parameters to be evaluated and determining, each time, the value of the frequency most appropriate for measuring each parameter, then adjusting the generator (4, 5, 8) to one of the frequencies thus determined in order to perform subsequent tests on other parts considered to exhibit one of the said parameters.
DK576484A 1983-12-16 1984-12-04 NON-DESTRUCTIVE TEST METHOD WITH ANIMALS AND FREQUENCY SWEEP SYSTEM DK576484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000443558A CA1212997A (en) 1983-12-16 1983-12-16 Frequency scanning eddy current non destructive testing method and system

Publications (2)

Publication Number Publication Date
DK576484D0 DK576484D0 (en) 1984-12-04
DK576484A true DK576484A (en) 1985-06-17

Family

ID=4126768

Family Applications (1)

Application Number Title Priority Date Filing Date
DK576484A DK576484A (en) 1983-12-16 1984-12-04 NON-DESTRUCTIVE TEST METHOD WITH ANIMALS AND FREQUENCY SWEEP SYSTEM

Country Status (8)

Country Link
EP (1) EP0146091B1 (en)
JP (1) JPS60152950A (en)
AT (1) ATE51708T1 (en)
AU (1) AU3646284A (en)
CA (1) CA1212997A (en)
DE (1) DE3481859D1 (en)
DK (1) DK576484A (en)
ES (1) ES8606645A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993009428A1 (en) * 1991-10-29 1993-05-13 Siemens Aktiengesellschaft Circuit assembly and method for electrical eddy-current testing
EP0543648A1 (en) * 1991-11-21 1993-05-26 Kaisei Engineer Co., Ltd. Inspection device using electromagnetic induction and method therefor
DE4333830C2 (en) * 1993-09-30 1997-11-27 Inst Maschinen Antriebe Und El Method for the selective determination of quantities for the continuous, spatially resolving examination of material parameters close to the surface for the production control as well as arrangement for the implementation of the method
JP2003050233A (en) * 2001-08-07 2003-02-21 Marktec Corp Eddy-current flaw detection testing method and eddy- current flaw detection testing device
JP4809039B2 (en) 2005-11-07 2011-11-02 偕成エンジニア株式会社 Electromagnetic induction type inspection apparatus and electromagnetic induction type inspection method
ES2294924B1 (en) * 2006-04-07 2009-02-16 Universidad De Salamanca METHOD AND APPARATUS FOR MEASURING ELECTRICAL CONDUCTIVITY AS WELL AS TO PERFORM A STRUCTURAL AND DIMENSIONAL CHARACTERIZATION OF CYLINDRICAL METAL SAMPLES BY INDUCTIVE TECHNIQUES.
US9817078B2 (en) 2012-05-10 2017-11-14 Allegro Microsystems Llc Methods and apparatus for magnetic sensor having integrated coil
US10495699B2 (en) 2013-07-19 2019-12-03 Allegro Microsystems, Llc Methods and apparatus for magnetic sensor having an integrated coil or magnet to detect a non-ferromagnetic target
US10145908B2 (en) 2013-07-19 2018-12-04 Allegro Microsystems, Llc Method and apparatus for magnetic sensor producing a changing magnetic field
US9823092B2 (en) 2014-10-31 2017-11-21 Allegro Microsystems, Llc Magnetic field sensor providing a movement detector
US10012518B2 (en) 2016-06-08 2018-07-03 Allegro Microsystems, Llc Magnetic field sensor for sensing a proximity of an object
US10837943B2 (en) 2017-05-26 2020-11-17 Allegro Microsystems, Llc Magnetic field sensor with error calculation
US10996289B2 (en) 2017-05-26 2021-05-04 Allegro Microsystems, Llc Coil actuated position sensor with reflected magnetic field
US11428755B2 (en) 2017-05-26 2022-08-30 Allegro Microsystems, Llc Coil actuated sensor with sensitivity detection
US10823586B2 (en) 2018-12-26 2020-11-03 Allegro Microsystems, Llc Magnetic field sensor having unequally spaced magnetic field sensing elements
US11237020B2 (en) 2019-11-14 2022-02-01 Allegro Microsystems, Llc Magnetic field sensor having two rows of magnetic field sensing elements for measuring an angle of rotation of a magnet
US11280637B2 (en) 2019-11-14 2022-03-22 Allegro Microsystems, Llc High performance magnetic angle sensor
US11262422B2 (en) 2020-05-08 2022-03-01 Allegro Microsystems, Llc Stray-field-immune coil-activated position sensor
US11493361B2 (en) 2021-02-26 2022-11-08 Allegro Microsystems, Llc Stray field immune coil-activated sensor
US11578997B1 (en) 2021-08-24 2023-02-14 Allegro Microsystems, Llc Angle sensor using eddy currents

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR95394E (en) * 1966-01-11 1970-09-11 Commissariat Energie Atomique Method of non-destructive testing by eddy currents of electrically conductive tubes and corresponding apparatus.
FR2324003A1 (en) * 1975-09-09 1977-04-08 Commissariat Energie Atomique NON DESTRUCTIVE EDD CURRENT CONTROL PROCESS AND CORRESPONDING DEVICE, USING MULTI-FREQUENCY EXCITATION AND ALLOWING THE ELIMINATION OF CERTAIN PARAMETERS
DE2641798C3 (en) * 1976-09-17 1980-12-11 Friedrich Dr. 7410 Reutlingen Foerster Method and device for the contactless determination of physical or geometric properties

Also Published As

Publication number Publication date
EP0146091A2 (en) 1985-06-26
DE3481859D1 (en) 1990-05-10
DK576484D0 (en) 1984-12-04
JPS60152950A (en) 1985-08-12
CA1212997A (en) 1986-10-21
AU3646284A (en) 1985-06-20
ATE51708T1 (en) 1990-04-15
ES538619A0 (en) 1986-04-16
EP0146091A3 (en) 1985-07-31
EP0146091B1 (en) 1990-04-04
ES8606645A1 (en) 1986-04-16

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