METHOD AND SYSTEM FOR FINDING TRANSDUCER RESONANT FREQUENCY
    12.
    发明公开
    METHOD AND SYSTEM FOR FINDING TRANSDUCER RESONANT FREQUENCY 有权
    用于查找传感器谐振频率的方法和系统

    公开(公告)号:EP2988137A1

    公开(公告)日:2016-02-24

    申请号:EP14793984.7

    申请日:2014-05-09

    Abstract: A system for finding a transducer resonant frequency, comprising: an initialization unit (11), a phase determination unit (12), an interval hopping control unit (13), a hopping interval generation unit (15), a frequency output control unit (17), a phase collection unit (16), and a resonant frequency point acquisition unit (14). Each hop allows a search range to be reduced by at least half of that of the previous interval, thus allowing for reduced amount of searches.

    Abstract translation: 一种用于查找换能器谐振频率的系统,包括:初始化单元(11),相位确定单元(12),间隔跳跃控制单元(13),跳跃间隔生成单元(15),频率输出控制单元 17),相位收集单元(16)和谐振频率点获取单元(14)。 每一跳都可以使搜索范围缩短至少一半,因此可以减少搜索量。

    Focal type electromagnetic acoustic transducer and flaw detection system and method
    13.
    发明公开
    Focal type electromagnetic acoustic transducer and flaw detection system and method 失效
    Elektromagnetischer Schallwandler vom fokalen Typ sowie系统和Verfahren zur Fehlerdetektion

    公开(公告)号:EP0867718A2

    公开(公告)日:1998-09-30

    申请号:EP98105093.3

    申请日:1998-03-20

    Abstract: A focusing electromagnetic acoustic transducer is provided which comprises a pair of meander coils, three insulation sheets and a magnet. The meander coils are formed on both surfaces of one of the insulation sheets to be positioned such that the meander coils are coincident with each other, and they are covered with the other insulation sheets. Each of the meander coils comprises a plurality of coil segments wherein intervals between adjacent coil segments sequentially are varied from one end to the other end. The magnet is positioned above the layers consisting the meander coils and insulation sheets. The coil segments of each meander coil are straight lines in parallel with each others, sector shapes on respective circulars having the same center point, or generally circular shapes having the same center point

    Abstract translation: 提供一种聚焦电磁声换能器,其包括一对曲折线圈,三个绝缘片和磁体。 曲折线圈形成在一个绝缘片的两个表面上,以使得曲折线圈彼此重合,并且它们被其它绝缘片覆盖。 每个曲折线圈包括多个线圈段,其中相邻线圈段之间的间隔从一端到另一端依次变化。 磁铁位于由曲折线圈和绝缘片组成的层之上。 每个曲折线圈的线圈段是彼此平行的直线,具有相同中心点的相应圆形上的扇形形状,或者具有相同中心点的大体圆形形状

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