公开(公告)号：EP0734522A1

公开(公告)日：1996-10-02

申请号：EP95900757.0

申请日：1994-11-17

申请人： PRÜFTECHNIK DIETER BUSCH AG

发明人： SCHRÖDER, Bernd

IPC分类号： G01N27

CPC分类号： G01N27/9086

摘要： The aim of the invention is to design electronic components in such a way that their characteristics are permanently associated with them in such a way that, if necessary, they can be determined rapidly and fed directly to an electronic data-processing device for processing. The invention achieves this aim by fitting to the component an electronic data store (3) which stores the important characteristics of the component (1), an interface dedicated to the data store (3) fitted to the component (1) being designed for connection to a computer (8) for reading and/or processing the contents of the data store (3).

公开(公告)号：EP0543648A1

公开(公告)日：1993-05-26

申请号：EP92310564.7

申请日：1992-11-19

申请人： KAISEI ENGINEER CO., LTD.

发明人： Yasohama, Kazuhiko ,  Kohama, Hiroaki

IPC分类号： G01N27/90

CPC分类号： G01N27/9086 ,  G01N27/904

摘要： An electromotive induction current which is detected by an induction coil (30b) placed in an electromagnetic field generated by applying an alternating current to an exciting coil (30a) distinctively changes with the frequency of the applied alternating current in accordance with the conditions of an object (S) placed in the electromagnetic field. By analyzing the change in amplitude and/or frequency phase of the electromotive induction current, the physical properties, size and relative position of the object and internal defects such as a crack and pin hole in the object can be measured precisely.

摘要翻译： 由施加到励磁线圈（30a）上的交流电产生的电磁场中的感应线圈（30b）检测到的电动感应电流根据对象的条件与施加的交流电流的频率显着地变化 （S）放置在电磁场中。 通过分析电动感应电流的幅度和/或频率相位的变化，可以精确地测量物体的物理性质，尺寸和相对位置以及物体中的裂纹和针孔等内部缺陷。

公开(公告)号：EP0343590A3

公开(公告)日：1990-07-25

申请号：EP89109240.5

申请日：1989-05-23

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： Egner, Harald ,  Rus, Robert ,  Anthonio, Paul

IPC分类号： G01N27/90

CPC分类号： G01N27/9046 ,  G01N27/9086

摘要： Beschrieben wird ein Wirbelstromsensor mit einer Meßspule, in deren magnetischem Feld das zu erfassende Objekt ange­ordnet ist, und einer Referenzspule sowie einem Sinusgene­rator, dessen Ausgangssignal an die Spulen angelegt ist, deren Ausgangssignal mittels eines Subtrahierers subtra­hiert wird, dessen Ausgangssignal an einen ersten Demo­dulator direkt und an einen zweiten Demodulator über einen 90°-Phasenschieber angelegt ist, wobei an den Demodulato­ren als zusätzliches Signal das über einen Phasenschieber mit einstellbarem Phasenwinkel verschobene Ausgangssignal des Sinusgenerators angelegt ist, und der Phasenwinkel so gewählt ist, daß Störsignale in der komplexen Impedanz­ebene eine bestimmte Richtung haben. Der erfindungsgemäße Sensor zeichnet sich dadurch aus, daß das Ausgangssignal des ersten Demodulators über einen Ver­stärker mit einstellbarem Verstärkungsfaktor (a) und das Ausgangssignal des zweiten Demodulators über einen Ver­stärker mit einstellbarem Verstärkungsfaktor (b) an einen weiteren Subtrahierer angelegt ist, dessen Ausgangssignal (U trig ) z. B. über eine Triggerschwelle als Maß für das zu erfassende Objekt herangezogen wird.

公开(公告)号：EP3139161A1

公开(公告)日：2017-03-08

申请号：EP16184005.3

申请日：2016-08-12

申请人： Rolls-Royce plc

发明人： Hughes, Robert ,  Lane, Christopher

IPC分类号： G01N27/90 ,  G01D18/00

CPC分类号： G01R35/005 ,  G01D18/008 ,  G01N27/9086

摘要： A method of calibrating a sensor array (100). The array (100) comprises a plurality of elements (112) spaced from one another in a first direction (X), the array (100) defining an array spatial response function f(x). The calibration method comprises the following steps:
providing a test workpiece (110) comprising at least first and second calibrated defects (114, 116) spaced apart in the first direction by a characteristic distance such that when the first calibrated surface defect (114) is located at a position corresponding to a maximum of the array response function, the second calibrated surface defect (116) is located at a position corresponding to a minimum of the array response function;
passing the array (110) across the first and second calibrated surface defects (114, 116) in a direction normal to the first direction (X) and determining a peak sensor signal from at least two of the elements (112) in the array (110) to determine a root mean squared average of the array spatial response function; and
setting a rejection threshold as a predetermined proportion of the root mean squared average of the array spatial response function.

摘要翻译： 一种校准传感器阵列（100）的方法。 阵列（100）包括在第一方向（X）上彼此间隔开的多个元件（112），阵列（100）限定阵列空间响应函数f（x）。 校准方法包括以下步骤：提供测试工件（110），其包括在第一方向上间隔开的特征距离的至少第一和第二校准缺陷（114,116），使得当第一校准表面缺陷（114）为 位于与阵列响应函数的最大值相对应的位置处，第二校准表面缺陷（116）位于对应于阵列响应函数的最小值的位置; 在垂直于第一方向（X）的方向上使阵列（110）穿过第一和第二校准表面缺陷（114,116），并且从阵列中的元件（112）中的至少两个确定峰值传感器信号 110）确定阵列空间响应函数的均方根平均值; 并将拒绝阈值设置为阵列空间响应函数的均方根平均值的预定比例。

公开(公告)号：EP2778704A1

公开(公告)日：2014-09-17

申请号：EP13158641.4

申请日：2013-03-11

申请人： AMS AG

发明人： Mozsáry, András ,  Röhrer, Georg

IPC分类号： G01R33/10 ,  G01R33/00

CPC分类号： G01R33/0023 ,  G01N27/9086 ,  G01R33/0017 ,  G01R33/0035 ,  G01R33/06 ,  G01R33/10 ,  G01R35/005

摘要： A magnetic field sensor system comprises a plurality of magnetic field sensor elements (CSE), which each are configured to provide an individual sensor value, and of which a first portion is arranged in a first contiguous area (A1) and a second portion is arranged in a second contiguous area (A2), and a coil wire arrangement (CWA) comprising a first coil portion (CP1) and at least a second coil portion (CP2, ..., CP10) being connected to the first coil portion (CP1), wherein the first coil portion (CP1) is arranged close to the sensor elements (CSE) of the first area (A1) and the second coil portion (CP2) is arranged close to the sensor elements (CSE) of the second area (A2) such that, if a predetermined current is applied to the coil wire arrangement (CWA), a first magnetic field component is generated at the first area (A1) and a second magnetic field component is generated at the second area (A2) being opposite to the first magnetic field component. The magnetic field sensor system is configured to produce a total sensor value that is based on a difference between the individual sensor values provided within the first area (A1) and the individual sensor values provided within the second area (A2).

公开(公告)号：EP1281956B1

公开(公告)日：2013-11-27

申请号：EP02254759.0

申请日：2002-07-08

申请人： United Technologies Corporation

发明人： Bryson, David A. ,  Vargas, Chris

IPC分类号： G01N27/90

CPC分类号： G01N27/9086

公开(公告)号：EP2253953A1

公开(公告)日：2010-11-24

申请号：EP10163470.7

申请日：2010-05-20

申请人： PRÜFTECHNIK Dieter Busch AG

发明人： Hoelzl, Roland

IPC分类号： G01N27/90 ,  G01N15/10

CPC分类号： G01R35/005 ,  G01N27/9026 ,  G01N27/9086

摘要： A method for nondestructive and noncontact detection of faults in a test piece, with a transmitter coil arrangement with at least one transmitter coil which transmitter coil is used to bring a plurality of periodic electromagnetical AC fields to a test piece, a receiver coil arrangement with at least one receiver coil for detecting a periodic electrical signal which has a carrier oscillation whose amplitude and/or phase is modulated by a fault in the test piece. A signal processing unit producing a useful signal from the receiver coil signal, and an evaluation unit evaluating the useful signal for detection of a fault in the test piece. A self-test unit automatically or upon an external request undertakes systematic quantitative checking of signal processing functions of the signal processing unit and/or systematic quantitative checking of the transmitter coil arrangement and/or of the receiver coil arrangement and/or upon external request undertakes calibration of the signal processing unit using a calibration standard which replaces the transmitter coil arrangement and/or of the receiver coil arrangement.

摘要翻译： 一种用于对测试件中的故障进行非破坏性和非接触检测的方法，具有至少一个发射器线圈的发射器线圈装置，所述发射器线圈用于将多个周期性电磁AC场作用于测试片，接收器线圈装置 用于检测周期性电信号的至少一个接收器线圈，其具有振幅和/或相位被测试件中的故障调制的载波振荡。 信号处理单元，从接收器线圈信号产生有用的信号，以及评估单元，评估用于检测测试件中的故障的有用信号。 自检单元或外部请求对信号处理单元的信号处理功能进行系统的定量检查和/或发送器线圈装置和/或接收器线圈装置的系统定量检查和/或在外部请求承担时进行 使用替代发射器线圈装置和/或接收器线圈装置的校准标准对信号处理单元进行校准。

公开(公告)号：EP0969267B1

公开(公告)日：2003-11-12

申请号：EP99304814.9

申请日：1999-06-18

申请人： GENERAL ELECTRIC COMPANY

发明人： Hedengren, Kristina Helena

IPC分类号： G01B21/04 ,  G01N27/90

CPC分类号： G01N27/9086 ,  G01B21/042

公开(公告)号：EP0610331B1

公开(公告)日：1998-06-03

申请号：EP92922439.2

申请日：1992-10-27

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： VON BERNUS, Ludwig ,  ERMERT, Helmut ,  HIPPLER, Jörg

IPC分类号： G01N27/90

CPC分类号： G01R17/10 ,  G01N27/9046 ,  G01N27/9086

摘要： The invention concerns a circuit assembly including a measurement coil (L) located in one arm (2) of a bridge circuit. To power the bridge, the invention calls for two synchronized signal generators (14, 16) which can be controlled independently of each other and can supply the bridge simultaneously with different voltages. This makes it possible to balance the bridge, and hence carry out eddy-current testing at different frequencies, without the need for mechanically changeable circuit elements in the bridge arms (2, 8).

公开(公告)号：EP0474521B1

公开(公告)日：1996-05-29

申请号：EP91402003.7

申请日：1991-07-17

申请人： AEROSPATIALE Société Nationale Industrielle

发明人： Floret, Michel

IPC分类号： G01N27/90

CPC分类号： G01N27/9086 ,  G01N27/902