• 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:
    Device for non-destructive testing of pipes 2.1 The invention relates to a device for non-destructive testing of ferromagnetic steel pipes for longitudinal, transverse or oblique failure by means of a magnetic or magnetic inductive test method comprising a magnetic yoke which transmits the magnetic beam without contact. to the tube and at least two magnetic field-sensitive sensing probes designed as GMR sensors and an evaluation unit. 2.3 In this case, care is taken to ensure that the GMR sensors (1) as an array are combined in a single parallel connection to sensor groups (2) and only each sensor group is equipped with a preamplifier. a. Pig. 1
    公开号:SE1050165A1
    申请号:SE1050165
    申请日:2010-02-19
    公开日:2010-08-27
    发明作者:Gert Fischer；Sven Gwildies；Michael Kaack；Alfred Graff；Ashraf Koka；Stefan Nitsche
    申请人:V&M Deutschland Gmbh；
    IPC主号:
    专利说明:

    15 20 25 30 2 reliability. In addition, the low noise offers expanded possibilities with respect to the testing strategy.
    One consequence of the high lateral resolution is, however, that a single induction coil must be replaced by a number of GMR sensors (eg 8) to cover the same test surface and thus achieve the same test effect.
    Typically, each GMR sensor, like the classic Hall sensors in existing test facilities, is operated with its own differential preamplifier. The subsequent evaluation electronics must therefore be correspondingly designed with four channels.
    If the high resolution is not necessary for the test task, due to the probe properties, the reduction in the number of channels has so far taken place through a further processing step in electronics or only later in the digital part of the evaluation.
    This makes the test device very complicated and expensive.
    Through the use of each one preamplifier per GMR sensor, a large number of construction parts and supply lines are created. However, this complexity is necessary if the elevated lateral resolution is to be utilized. A further disadvantage is that the overall dimension of the test unit increases sharply and, where applicable, leads to problems in tight space conditions.
    If, for example, 8 coils in a test head are to be replaced by 8 GMR sensors that have the same test surface, 64 preamplifiers are now necessary instead of 8. In addition, the total number of supply lines rises from 9 (8 + 1 common ground) to 128. Due to the small dimensions of the sensors, it is difficult to mount this large number of supply lines in the test head. The task of the invention is to, instead of inductive sensors, provide a test head with at least two GMR sensors as array, also called row or group, for the magnetic or magnetic inductive fault test. The test head can, with the same test surface and test power, be manufactured with as low hardware consumption for mechanics and electronics as possible. At the same time, it must be possible to set the local resolution directly. 10 15 20 25 30 Accordingly, this task is solved by combining the GMR sensors as an array in a parallel connection to sensor groups and only each sensor group is provided with a preamplifier.
    The replacement of inductive probes with GMR sensors, which have an enormous potential to improve test results, which is required, for example, in increasing reliability, the possibility of testing larger wall thicknesses, expanded possibilities for signal evaluation through the sensor device, can be realized cost-effectively by the present invention. the reduction of electronic and mechanical complexity. The complexity of the test head is significantly reduced compared to conventionally designed GMR test heads with one preamplifier per sensor each.
    The technology of the GMR sensors allows a direct parallel connection of your sensors to an array. Thereby, the mentioned disadvantages of complicated sensor technology for each individual sensor can be avoided.
    Advantageously, the invention also allows direct adjustment of the resolution by combining only a subset of sensors.
    This results in the possibility of optimizing the design with regard to local resolution and component consumption.
    In order to be able to exclude test gaps which arise due to spatial separation of sensors, according to a preferred embodiment of the invention, two adjacent sensor groups are arranged so that they cover each other, i.e. overlap, with one sensor each.
    In order to be able to carry out an unambiguous coordination of a fault lying on the outer pipe surface or the inner pipe surface, in a further preferred embodiment of the invention, in addition to the arrangement of sensor groups next to each other, two sensor groups radially direction the pipe over each other so that these cover each other with all sensors.
    Corresponding to the method known from DE 10 2004 035 174, the vertically changing amplitude of the horizontal field component of the magnetic leak is recorded, firstly at a near-surface distance from the outer surface of the tube and secondly at a a more distant distance therefrom and the registered signals are related to each other.
    Furthermore, in the inventive test head with GMR sensors as array it is possible, as with coil sensors, to form the difference of nearby or more distant probes to suppress the background noise of the signal or to filter it out.
    In this case, the differences of nearby sensor packets or the differences of distant arbitrary sensor packets or the differences of sensor packets and a suitably arranged individual sensor can be formed using a suitable electronics.
    Further features, advantages and details of the invention will be apparent from the following description of the illustrated features.
    There: Fig. 1 shows in plan view the schematic illustration of an embodiment of the inventive connection of GMR sensors to arrays in a parallel connection Fig. 2 as Fig. 1, however, in a second embodiment.
    In Fig. 1, in a first embodiment, the inventive connection as parallel connection of GMR sensors to arrays is schematically illustrated in plan view. The arrow shows the test direction of the tube not illustrated here.
    In this case, a 6-channel inductive probe system was replaced by eight GMR sensors 1 which were combined into two sensor groups 2 with four GMR sensors 1 connected in parallel.
    Each sensor group 2 is equipped according to the invention with only one preamplifier (not illustrated here), whereby the component consumption was considerably reduced.
    To avoid test gaps, it is advantageous to arrange sensor groups one after the other in the test direction and offset so that the test tracks cover each other with one sensor each (Fig. 2). In the illustrated embodiment, the number of structural elements was reduced by a factor of 4 relative to the conventional coupling where GMR sensors are arranged in series and the resolution increased relative to the conventional coil system by a factor of 2. The sensor axis orientation is chosen here parallel to the test direction (magnetization direction). resp. longitudinal error. However, the orientation can also be twisted, in order to increase the sensitivity to skewed errors.
    However, the device according to Figs. 1 and 2 can also be modified. In order to achieve a differential formation of the signals and thus an increased informative value, two sensor groups can be arranged with different distances to the tube and above each other in such a way that two sensors cover each other. Thus, a difference formation can be made for the respective signals according to DE 10 2004 035 174.
    权利要求:
    Claims (4)
    [1]
    A device for the non-destructive testing of ferromagnetic steel tubes for the detection of longitudinal, transverse or oblique errors by magnetic or magnetic inductive test method, comprising a magnetic yoke which seamlessly transmits the magnetic beam to the tube and at least two magnetic field sensitive sensing probes GMR sensors and an evaluation unit, characterized in that the GMR sensors (1), as an array, are connected in a parallel connection to sensor groups (2) and that only each sensor group is equipped with a preamplifier.
    [2]
    Device according to Claim 1, characterized in that the GMR sensors (1) can optionally be connected in their entirety or in a subset.
    [3]
    Device according to claims 1 and 2, characterized in that the sensor groups, seen in the test direction, are arranged one after the other or next to each other so that the sensor groups cover each other with one sensor each.
    [4]
    Device according to claims 1-3, characterized in that the sensor groups, in radial direction, are arranged one above the other in such a way that the sensor groups cover each other with all SGHSOFGF.
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    同族专利:
    公开号 | 公开日
    SE534938C2|2012-02-21|
    US8344725B2|2013-01-01|
    DE102009010453A1|2010-09-09|
    US20100219818A1|2010-09-02|
    引用文献:
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    US5581037A|1992-11-06|1996-12-03|Southwest Research Institute|Nondestructive evaluation of pipes and tubes using magnetostrictive sensors|
    US6593562B1|2001-10-04|2003-07-15|Indigo Systems Corporation|Electro-optical sensor arrays with reduced sensitivity to defects|
    US20050007108A1|2003-07-11|2005-01-13|Teodor Dogaru|Probes and methods for detecting defects in metallic structures|
    US7015690B2|2004-05-27|2006-03-21|General Electric Company|Omnidirectional eddy current probe and inspection system|
    DE102004035174B4|2004-07-16|2006-08-10|V&M Deutschland Gmbh|Method and device for non-destructive testing of pipes|
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    DE102009060106A1|2009-12-17|2011-06-22|Salzgitter Mannesmann Line Pipe GmbH, 57074|Method for testing compounds of metal workpieces with plastic masses on cavities by means of ultrasound|
    US9417213B1|2011-07-11|2016-08-16|The Boeing Company|Non-destructive evaluation system for aircraft|
    DE102011055409A1|2011-11-16|2013-05-16|V&M Deutschland Gmbh|Stray flux probe for non-destructive stray flux testing of bodies made of magnetisable material|
    DE102012006472B4|2012-03-22|2013-11-21|Europipe Gmbh|Method for producing welded steel pipes|
    GB201205971D0|2012-04-03|2012-05-16|Rolls Royce Goodrich Engine Control Systems Ltd|Apparatus for fluid temperature measurement|
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    WO2016007305A1|2014-07-11|2016-01-14|Halliburton Energy Services, Inc.|Multiple-depth eddy current pipe inspection with a single coil antenna|
    RU2650358C2|2015-08-25|2018-04-11|Общество с ограниченной ответственностью "Нординкрафт Санкт-Петербург"|Method of ultrasonic inspection of welded joints of pipes and system for its implementation|
    US11009484B1|2016-03-11|2021-05-18|The University Of Tulsa|Velocity independent two-component magnetic flux leakage detective system|
    RU167815U1|2016-09-01|2017-01-10|Общество с ограниченной ответственностью "Нординкрафт Санкт-Петербург"|Installation of non-destructive testing of pipes|
    RU175875U1|2017-04-13|2017-12-21|Закрытое акционерное общество "Ультракрафт"|Installation for industrial automated ultrasonic monitoring of metal products|
    RU187834U1|2018-03-29|2019-03-19|Алексей Михайлович Кашин|EMA installation for industrial automated ultrasonic monitoring of metal products|
    RU198713U1|2020-01-09|2020-07-23|Акционерное общество "Виматек" |DEVICE FOR NON-DESTRUCTIVE PIPE CONTROL|
    法律状态:
    2014-09-30| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    DE200910010453|DE102009010453A1|2009-02-26|2009-02-26|Device for non-destructive testing of pipes|
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