• 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:
    The invention relates to the field of non-destructive ultrasonic testing of materials and products and can be used to determine the type of defects in welded joints. The purpose of the invention is to improve the accuracy of determining the type of defect. Reflected echo signals are received from the defect zone and the locations of reflective points are determined, which determine the conditional contour of the defect as the closest ellipse to it, determine the angular position of the main axis of the ellipse, the ratio of the main and minor axes of the ellipse, the position of the midpoint of the ellipse, the height of the projection of the ellipse, the difference in the path of the ultrasonic pulses from such symmetrically located relative to the main axis of the reflecting points of the resulting ellipse, at which the value of the echo signals is maximum, and taking into account the sex These parameters determine the type of defect, which can be planar, bulk or combined. 1 hp f-ly.
    公开号:SU1662359A3
    申请号:SU864028261
    申请日:1986-10-02
    公开日:1991-07-07
    发明作者:Ганглбауер Отто；Ауссервегер Йозеф；Валльнер Феликс
    申请人:Фоест-Альпине Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the field of ultrasonic non-destructive testing of materials and products and can be used to determine the type of defects in welded joints.
    The aim of the invention is to improve the accuracy of determining the type of defect.
    The essence of the method for determining the type of defects in welded joints of plane-parallel products is as follows.
    When examining a defective area of an item using an ultrasonic echo signal, echo signals from the defect are recorded, which determine the location of the reflecting points of the defect, which are used to build a cross-section or B-image image of a cluster of points with a contour of undefined shape, provided that a specified number of reflecting points is obtained. In order to achieve an objective result, a cluster of points can be given a regular shape. A closed complex-shaped line can be simplified in several steps into a simple line, for example, an ellipse, or a second-order closed curve can be directly computed and shown, which can be done by determining the center of gravity of the resulting contour of reflective points.
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    Thus, it is possible to obtain an unambiguous indication of the extent and orientation of the defective area.
    If the defective area is bounded by a second-order curve, in particular an ellipse, then the principal axis and the small axis of the ellipse and their spatial position can be determined. The intersection point of both axes is the midpoint and the ratio of half the length of the main axis to half the length of the minor axis is the ratio of the axes. Based on these parameters, in particular, the angular position of the main axis of the ellipse relative to the fixed in space coordinate system attached to the article under investigation, it is decided from which second position the radiation of pulses will be emitted into the product.
    At the same time, ultrasonic oscillations excite so that their direction is perpendicular to the main axis of the ellipse, and the distance of excitation points to the zone of the defect would be greater than in the first position.
    The method for determining the type of defects is carried out as follows.
    Ultrasonic transceiver transducers are installed on one side of the product on opposite sides of the defect zone and excite pulses of ultrasonic vibrations in the product with their help from different angles. The echo signals directly reflected from the defects are received, as well as the echo signals once reflected from the bottom of the product, and the arrival times of the received echo signals are measured, the positions of the reflecting points are determined by the magnitude of which. When obtaining reflective points of a predetermined density using a computer and a plotter, the conditional contour of the defect is determined in the form of an ellipse that is closest to it. The computer then determines the angular position of the main axis of the ellipse, the ratio of the main and minor axes of the ellipse, the position of the midpoint of the ellipse, the height of the projection of the ellipse, and the path difference of ultrasonic pulses from such symmetrically located relative to the main axis of the reflecting points of the ellipse at which the echoes maximum. To get

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    Neither of these points, it is necessary to carry out the emission of ultrasonic pulses from the second position until the maximum amplitudes of echo channels are received. The distance between these points (the difference in the path of the ultrasonic maximum echo pulses) corresponds to the thickness of the defect, which is a necessary characteristic for determining the shape of the defect.
    The selection of the points of radiation of ultrasound pulses from the second position is made depending on the angular position of the main axis of the ellipse. Moreover, the ultrasonic transducers are installed in the second position so that the direction of the emitted pulses is perpendicular to the main axis of the ellipse, and the distance of the ultrasonic transducers in the second position to the defect zone would be greater than in the first position. After measuring these parameters, taking into account the welding-technical and design parameters stored in the computer memory, the types of defects are determined, which, depending on the ratio between the length and thickness of the defect, are divided into planar, bulk and combined.
    权利要求:
    Claims (2)
    [1]
    1. Ultrasonic method for determining the type of defects in welded joints of plane-parallel products, which means that ultrasonic transducer pulses emit from one side of the product at different angles and at least from two different positions emit ultrasound transducers the side of the defect zone and above it, take echoes reflected from the defect and echoes from the defect, once reflected from the bottom of the product, measure the arrival times of the floor echo signals, which determine the location of the reflecting points of the defect, taking into account the type of defect, characterized in that, in order to improve the accuracy of determining the type of defect, the conditional contour of the defect is determined as the closest to the the shape of the ellipse is determined by the angular position of the principal
    five
    ellipse axes, the ratio of the main and minor axes of the ellipse, the position of the midpoint of the ellipse, the difference of the path. ultrasonic pulses from such reflective points of the ellipse symmetrically located relative to the main axis, at which the echo size is maximum, the height of the projection of the ellipse and the type of defect based on the data obtained, taking into account the welding-technical and design parameters of the product.
    [2]
    2. A method according to claim 1, characterized in that the radiation thereof
    The ultrasonic oscillation pulses from the second position are performed after determining the angular position of the main axis of the ellipse obtained, the ultrasonic transducers being set to the second position so that the direction of the emitted ultrasonic oscillations pulses are perpendicular to the main axis of the ellipse and the ultrasonic transducers in the second position to the zone The defect was larger than in the first position.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1662359A3|1991-07-07|Ultrasonic testing of welded joints of flat-parallel articles
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    US5492012A|1996-02-20|Time-of-flight method for sizing cracks through fluid-filled gaps in structures
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    US4467653A|1984-08-28|Method and apparatus for ultrasonic analysis
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    SU1516958A1|1989-10-23|Method of determining configuration of defect in articles
    SU815614A1|1981-03-23|Ultrasonic method of young's modulus measurement
    SU1320742A1|1987-06-30|Method of ultrasonic shadow examination of articles and device for effecting same
    SU1293630A1|1987-02-28|Method of ultrasonic checking of articles
    RU1809378C|1993-04-15|Method of article ultrasound check
    SU1516965A1|1989-10-23|Ultrasonic method of determining parameters of flat defects of articles
    同族专利:
    公开号 | 公开日
    AT70915T|1992-01-15|
    DE3683115D1|1992-02-06|
    EP0217783A3|1989-05-31|
    CN1007933B|1990-05-09|
    ATA286685A|1990-02-15|
    EP0217783A2|1987-04-08|
    AT391210B|1990-09-10|
    CA1270940A|1990-06-26|
    CN86106835A|1987-07-08|
    JPS6291856A|1987-04-27|
    US4744250A|1988-05-17|
    EP0217783B1|1991-12-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS4940790A|1972-08-22|1974-04-16|
    JPS52143879A|1976-05-26|1977-11-30|Nippon Steel Corp|Ultrasonic flaw detection method|
    DK139597C|1977-07-01|1979-08-27|Akademiet For De Tekniske Videnskaber Svejsecentralen|
    AT27063T|1981-09-10|1987-05-15|Hoesch Ag|MEASUREMENT METHOD FOR DETERMINING FAULTS IN WELDING SEAMS.|
    JPH0146025B2|1982-07-20|1989-10-05|Kobe Steel Ltd|
    DE3236017C2|1982-09-29|1984-10-31|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München|Method for the non-destructive testing of a workpiece|JP2643318B2|1988-06-20|1997-08-20|三菱電機株式会社|3D object shape recognition method using ultrasonic waves|
    WO1994019686A1|1993-02-18|1994-09-01|Krautkrämer Gmbh & Co. Kg|Ultrasonic testing device for weld seams in pipes, sheets and containers|
    US6405596B1|2000-10-13|2002-06-18|Chicago Bridge & Iron Company|Ultrasonic austenitic weld seam inspection method and apparatus|
    DE102006027956A1|2006-06-14|2007-12-20|Ge Inspection Technologies Gmbh|Ultrasonic tester with array probes|
    CA2593894C|2006-12-01|2016-11-08|Roentgen Technische Dienst B.V.|A method for configuring an array of transducers in an ultrasonic test apparatus|
    JP4839333B2|2008-03-19|2011-12-21|日立Ｇｅニュークリア・エナジー株式会社|Ultrasonic inspection method and ultrasonic inspection apparatus|
    DE102008002450A1|2008-04-11|2009-10-15|Ge Inspection Technologies Gmbh|Method for the non-destructive testing of a test specimen by means of ultrasound and device for this purpose|
    US8215173B2|2008-08-05|2012-07-10|Roger Spencer|UT method of identifying a stuck joint|
    CN101477065B|2009-01-08|2011-02-09|西安电子科技大学|IC defect classification method based on defect boundary value change frequency|
    KR101928946B1|2011-05-10|2019-03-12|에디슨 웰딩 인스티튜트, 인코포레이티드|Three-dimensional matrix phased array spot weld inspection system|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    AT2866/85A|AT391210B|1985-10-03|1985-10-03|METHOD FOR DETERMINING THE TYPE OF DOT-SHAPED AND LENGTH-EXTENDED INDIVIDUAL ERRORS IN WORKPIECES BY MEANS OF ULTRASOUND|
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