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    • 7. 发明申请
    • METHOD AND APPARATUS FOR EXTERNAL PIPELINE WELD INSPECTION
    • 外部管道焊接检测方法与装置
    • US20120201347A1
    • 2012-08-09
    • US13392672
    • 2010-08-27
    • Garth R. PrenticeStephen KnightStephen G. Drake
    • Garth R. PrenticeStephen KnightStephen G. Drake
    • G01N23/18
    • G01N23/18B23K31/125G01N2223/3303G01N2223/3304G01N2223/628G01N2223/629
    • An apparatus is provided for external inspection of a pipeline circumferential weld. This comprises a radiation source (5) and radiation detector (3). Both units are controllably movable around a drive band or track (7) which is fitted around the circumferential weld. To align the source with the detector the source and detector are moved with respect to each other clockwise and anticlockwise around an initial position whilst sampling the radiation detected at a number of positions. A position of maximum strength of the radiation signal detected can then be determined such that the centre point of the radiation source may be located. The source and detector are then substantially aligned with each other and means are provided to move the source and detector circumferentially around the weld whilst remaining substantially in alignment.
    • 提供了一种用于外部检查管道周向焊缝的装置。 这包括辐射源(5)和辐射探测器(3)。 两个单元可围绕围绕周向焊缝的驱动带或轨道(7)可控地移动。 为了将源与检测器对准,源和检测器相对于彼此顺时针和逆时针方向围绕初始位置移动,同时对在多个位置处检测到的辐射进行采样。 然后可以确定检测到的辐射信号的最大强度的位置,使得辐射源的中心点可以被​​定位。 源和检测器然后基本上彼此对准,并且提供装置以使源和检测器周向地围绕焊缝移动,同时保持基本上对齐。