• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. Apparatus for the non-destructive testing of articles by eddy-currents comprising an excitation generator (10), a probe (14) connected to said generator, the probe having therein sampling means for a measurement potential (Vm) corresponding to an article being tested generating, means for a reference potential (Vr) corresponding to a standard article, a differential amplifier (20) having first (20/1) and second (20/2) inputsand an output, the first input receiving the measurement potential and the second receiving the reference potential digital signal-treatment means (24) having an input connected to the output of the differential amplifier (20) a cross and amplifier (22), said treatment means comprising in succession an analog digital converter (30), a first direct-access live memory (32) and a digital treatment circuit (34) characterised in that the generating means for the reference potential comprise a second direct access live memory (40) having an input (39) and an output (42), the input being connected to the output of the first live memory (32) across an interrupter circuit (37), and a digital-analog converter (44) having an input (43) connected to the output (42) of the second memory (40) and an output (45) connected to the second input (20/2) of the differential amplifier (20).
    公开号:SU1281180A3
    申请号:SU833555362
    申请日:1983-02-22
    公开日:1986-12-30
    发明作者:Пьер Дъонт Жан
    申请人:Интерконтроль С.А. (Фирма)；
    IPC主号:
    专利说明:

    00
    权利要求:
    Claims (1)
    [1]
    The invention relates to a means of non-destructive testing of materials by electromagnetic methods and can be used for the inspection of electrical transmission materials. The purpose of the invention is to improve accuracy. . In the drawing, a block diagram of a device for eddy current testing of the product is shown. The device contains a differential amplifier 1, one input 2 of which is connected to the output of an eddy current transducer connected to the output of a generator (not shown), connected at the output of differential amplifier 1, connected in series adjustable amplifier 3, analog-digital converter 4, block 5 ti, discrete signal processing unit 6, output information unit 7, connected between another input 8 of differential amplifier 1 and outputs of memory unit 5, additional memory unit 9, switch 10 and supplement ny analog-digital converter 11, furthermore, there are blocks 12 and the synchronization and address counters 14 and 15 and, if necessary tsessor MPU 16 through which may be implemented partially or fully control algorithm article Work device comprises of the following. The eddy current converter signal transmitted through differential and adjustable amplifiers 1 and 3, analog-digital converter 4 to memory block 5 is redirected through switch 10 and synchronization and addressing blocks 12 and 13 and counters 14 and 15 to the additional memory block 9, this signal as a reference is fed through an additional analog-to-digital converter 11 to the input 8 of the differential amplifier 1. The subsequent signal with a vortex of 1 02 current converter arriving at the input 2 is algebraically ummiruets with said reference signal and the output signal of the differential amplifier 1 will be the result of this summing. This signal is transmitted through block 6 to output information block 7, according to the indicators of which the operator determines the results of the control and, if necessary, records them. Thus, having implemented a two-stroke control mode by comparing each previous signal with a subsequent one, the control accuracy is improved by eliminating reference product samples or special sources of reference signals from a block of 4, 5, 6, 8, 11, 12, and 13 counters 14, 15 and the switch 10 is relatively simple in terms of manufacturing technology of digital electronic integrated circuits. An apparatus for eddy current testing of a product, comprising a generator connected to a generator; an eddy current converter connected to the last one input; a two input adder connected to its output serially connected amplifier, analog-to-digital converter, memory block, digital signal processing unit and connected between the other input of the two-input adder and the output of the memory block, an additional memory block, characterized in that, in order to increase the control accuracy, the instrument is equipped with connected between the memory blocks of the switch and connected between the output of the additional memory block and the input of the additional analog-to-digital converter, and the adder is designed as a differential amplifier.
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    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    FR2522152B1|1985-05-24|
    DE3361815D1|1986-02-27|
    US4556846A|1985-12-03|
    JPS58155355A|1983-09-16|
    EP0088652B1|1986-01-15|
    IE830316L|1983-08-23|
    EP0088652A1|1983-09-14|
    CA1207837A|1986-07-15|
    FR2522152A1|1983-08-26|
    AT17525T|1986-02-15|
    BE892243A|1982-06-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3229198A|1962-09-28|1966-01-11|Hugo L Libby|Eddy current nondestructive testing device for measuring multiple parameter variables of a metal sample|
    GB1174748A|1967-08-17|1969-12-17|Tateisi Electronics Company|Apparatus for Detecting Vehicles|
    CH625619A5|1977-12-07|1981-09-30|Bbc Brown Boveri & Cie|
    US4207520A|1978-04-06|1980-06-10|The United States Of America As Represented By The Secretary Of The Air Force|Multiple frequency digital eddy current inspection system|
    DE2825958C2|1978-06-14|1986-02-20|Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co KG, 7410 Reutlingen|Magnetic or magnetic inductive material tester with zero point compensation device|
    FR2443682B1|1978-12-07|1982-03-26|Commissariat Energie Atomique|
    US4230987A|1979-02-26|1980-10-28|Sensor Corporation|Digital eddy current apparatus for generating metallurgical signatures and monitoring metallurgical contents of an electrically conductive material|
    FR2451032B1|1979-03-09|1981-10-23|Commissariat Energie Atomique|US4709213A|1982-07-23|1987-11-24|Garrett Electronics, Inc.|Metal detector having digital signal processing|
    FR2570500B1|1984-09-20|1987-03-20|Siderurgie Fse Inst Rech|METHOD AND DEVICE FOR DETECTING TYPICAL DEFECTS ON A RUNNING PRODUCT, PARTICULARLY FOR DETECTING CRACKS ON A SLAB|
    DE3525376C2|1985-07-16|1991-03-28|Nukem Gmbh, 8755 Alzenau, De|
    DE3533011C2|1985-09-16|1990-12-06|Siemens Ag, 1000 Berlin Und 8000 Muenchen, De|
    JPS62108150A|1985-11-06|1987-05-19|Shigeru Kitagawa|Method and device for detecting minute crack|
    SE467711B|1987-02-09|1992-08-31|Bengt Hjalmar Toernblom|DEVICE FOR Saturation / Testing with Invertebrate Flow Technology Medium Multiple Dynamically Compensated Sensors|
    JPS6439502A|1987-08-05|1989-02-09|Man Design Co|Length measuring instrument|
    DE3856407T2|1987-09-21|2000-09-07|Hitachi Ltd|Method and device for the detection of embrittlement of metals|
    US5055784A|1987-12-07|1991-10-08|American Research Corporation Of Virginia|Bridgeless system for directly measuring complex impedance of an eddy current probe|
    US5144231A|1988-09-30|1992-09-01|Jeffrey Tenenbaum|Eddy current detector for detecting an object with offset compensation|
    DE4003330A1|1990-02-05|1991-08-08|Foerster Inst Dr Friedrich|Eddy current tester|
    US5394084A|1991-12-23|1995-02-28|The Boeing Company|Method and apparatus for reducing errors in eddy-current conductivity measurements due to lift-off by interpolating between a plurality of reference conductivity measurements|
    JP2929402B2|1992-07-10|1999-08-03|日石三菱株式会社|Inspection method and apparatus for carbon fiber reinforced tubular composite|
    US5623427A|1994-09-02|1997-04-22|Defelsko Corporation|Nondestructive anodic capacity gauge|
    US5602474A|1995-06-06|1997-02-11|United Technologies Corporation|Detecting cracks in non-uniform areas of metal parts including position correlation|
    US6433524B1|2001-03-15|2002-08-13|Rosemount Aerospace Inc.|Resistive bridge interface circuit|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    BE0/207389A|BE892243A|1982-02-23|1982-02-23|EDGE CURRENT MONITORING APPARATUS WITH ELECTRONIC BALANCING MEANS.|
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