ELECTRICAL SIGNAL PROCESSING DEVICE
    5.
    发明公开
    ELECTRICAL SIGNAL PROCESSING DEVICE 审中-公开
    电信号处理装置

    公开(公告)号:EP3225985A1

    公开(公告)日:2017-10-04

    申请号:EP15863626.6

    申请日:2015-11-26

    Abstract: When frequencies used in the two-frequency measurement of a SAW sensor are represented by f 1 and f 2 (f 2 > f 1 ), an electrical signal processing device is provided without use of oversampling at a frequency higher than twice the frequency f 2 or a two-system low-frequency conversion circuit, in which temperature compensation with the same accuracy as the case where these are used can be realized.
    Narrow band frequency filtering is applied to a waveform after roundtrips in a delay line type SAW sensor capable of transmitting and receiving multiple frequencies, the two frequencies f 1 and f 2 (f 2 > f 1 ) are extracted, and a delay time is determined utilizing an aliasing obtained by applying undersampling at a frequency lower than twice the frequency f 1 .

    Abstract translation: 当通过f1和f2(f2> f1)表示在SAW传感器的双频测量中使用的频率时,提供电信号处理设备而不使用频率高于频率f2的两倍的频率的过采样或双系统 低频转换电路,其中可以实现具有与使用它们的情况相同的精度的温度补偿。 在能够发送和接收多个频率的延迟线型SAW传感器中往返之后的波形中应用窄带频率滤波,提取两个频率f1和f2(f2> f1),并且利用获得的混叠来确定延迟时间 通过以低于频率f1两倍的频率应用欠采样。

    ANORDNUNG ZUR ZERSTÖRUNGSFREIEN WERKSTOFFPRÜFUNG
    6.
    发明公开
    ANORDNUNG ZUR ZERSTÖRUNGSFREIEN WERKSTOFFPRÜFUNG 审中-公开
    ANORDNUNG ZURZERSTÖRUNGSFREIENWERKSTOFFPRÜFUNG

    公开(公告)号:EP3149468A1

    公开(公告)日:2017-04-05

    申请号:EP15726907.7

    申请日:2015-05-26

    Abstract: The invention relates to an assembly for nondestructive material testing, by means of which assembly shear waves are emitted into elastic surfaces of components or workpieces and detected, wherein piezoelectric transducer elements are arranged one over the other in a plurality of planes and the piezoelectric transducer elements that are arranged in adjacent planes are operated oppositely to each other. The piezoelectric transducer elements can be piezoelectric fibers and/or piezoelectric plate-shaped elements, which are connected to or embedded in an elastically deformable material.

    Abstract translation: 本发明涉及一种用于非破坏性材料测试的组件,通过该组件将组装的剪切波发射到组件或工件的弹性表面中并被检测,其中压电换能器元件在多个平面中彼此排列并且压电换能器元件 布置在相邻平面中的操作彼此相反地操作。 压电换能器元件可以是压电纤维和/或压电板状元件,其连接到或嵌入到可弹性变形的材料中。

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