利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

44 条记录 (耗时 0.02 秒)

    NON DESTRUCTIVE TESTING APPARATUS AND METHOD USING ULTRASOUND IMAGING
    21.
    发明公开
    NON DESTRUCTIVE TESTING APPARATUS AND METHOD USING ULTRASOUND IMAGING 有权
    ZESTÖRUNGSFREIESPRUFGERÄT以外地区麻醉药超声心动图

    公开(公告)号：EP2726861A1

    公开(公告)日：2014-05-07

    申请号：EP12737911.3

    申请日：2012-06-29

    申请人： Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO

    发明人： HUNTER, Alan Joseph ,  VOLKER, Arno Willem Frederik

    IPC分类号： G01N29/06 ,  G01N29/07 ,  G01S15/89

    CPC分类号： G01N29/07 ,  G01N29/069 ,  G01N2291/044 ,  G01S7/52049 ,  G01S15/8915 ,  G01S15/8952

    摘要： Improved imaging is provided for structures under test that have propagation direction dependent ultrasound propagation speed or position dependent ultrasound propagation speed due to fibrous, coarse grain or single crystalline material. A set reflection points is selected in the structure under test and ultrasound propagation time delays between the reflection point or points on one hand and the plurality of positions on the other hand that fit an observed time delay of the detected reflections are computed. This may be done by means of an iterative method. In the iterative method a synthetically focused ultrasound beam is realized by summing measurements after compensation for propagation time delay from different transmitting transducers to the reflection points. Time delays to receiving transducers are measured from the arrival time of reflections of this synthetically focused ultrasound beam, and the propagation time delay from different transmitting transducers is iteratively adapted until it matches time delays corresponding to the measured arrival times. Time delays to other points in the structure under test are interpolated between the selected reflection points and used in the computation of an image of reflections within the structure under test.

    摘要翻译： 对于具有传播方向依赖的超声传播速度或由于纤维，粗粒或单晶材料引起的位置相关超声传播速度的结构，提供了改进的成像。 在被测结构中选择设定的反射点，并计算一方面的反射点或点之间的超声波传播时间延迟和另一方面的适合所检测的反射的观察时间延迟的多个位置。 这可以通过迭代方法来完成。 在迭代方法中，通过对从不同的发射换能器到反射点的传播时间延迟进行补偿后求和来实现合成聚焦超声波束。 从该合成聚焦超声波束的反射的到达时间测量接收换能器的时间延迟，并且迭代地适配来自不同发射换能器的传播时间延迟，直到它匹配对应于测量的到达时间的时间延迟。 在所选择的反射点之间插入被测结构中其他点的时间延迟，并用于计算被测结构内的反射图像。

    METHOD AND APPARATUS FOR CHARACTERIZING A MEDIUM USING ULTRASOUND MEASUREMENTS
    28.
    发明公开
    METHOD AND APPARATUS FOR CHARACTERIZING A MEDIUM USING ULTRASOUND MEASUREMENTS 审中-公开
    VERFAHREN UND VORRICHTUNG ZUR CHARAKTERISIERUNG EINES MEDIUMS MITTELS ULTRASCHALLMESSUNGEN

    公开(公告)号：EP3126823A1

    公开(公告)日：2017-02-08

    申请号：EP15719311.1

    申请日：2015-03-31

    申请人： Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO ,  Sonaxis S.A.

    发明人： VOLKER, Arno Willem Frederik ,  VAN NEER, Paul Louis Maria Joseph ,  PIERRE, Guillaume Lucien Gérard ,  BOUVET, Francois Louis Denis Marie ,  CROZAT, Sophie

    IPC分类号： G01N25/02 ,  G01N29/024 ,  G01N29/032 ,  G01N29/46 ,  G01N29/52 ,  G01N29/34

    摘要： Properties of a medium, such as its particle size distribution, are characterized using a measurement cell containing a medium between walls of the cell, with ultrasound transducers on opposite walls. Ultrasound is transmitted from the ultrasound transducers on both sides and transmission and reflection responses are detected. An ultrasound frequency dependent ratio of a Fourier transform value of a product of signals obtained from transmission responses in opposite directions and a Fourier transform value of a product of signals obtained from reflections at the transducers is computed. Preferably, the first received reflected and transmitted pulses in response to pulse excitation are used to compute the ratio. Ultrasound frequency dependent ultrasound speed and/or attenuation data of ultrasound in the medium are computed as a function of the ultrasound frequency from the ratio. This eliminates the effect of the walls.

    摘要翻译： 介质的性质，例如其粒度分布，使用包含细胞壁之间的介质的测量单元，在相对的壁上具有超声换能器来表征。 超声波从两侧的超声波传感器传输，并检测传输和反射响应。 计算从相反方向上的传输响应获得的信号的乘积的傅立叶变换值与从换能器处的反射获得的信号的乘积的傅立叶变换值的超声频率相关比。 优选地，使用响应于脉冲激励的第一接收的反射和发射的脉冲来计算该比率。 超声频率相关超声速度和/或介质中超声波的衰减数据作为超声波频率的函数计算。 这消除了墙壁的影响。

    METHOD AND A SYSTEM FOR ULTRASONIC INSPECTION OF WELL BORES
    29.
    发明公开
    METHOD AND A SYSTEM FOR ULTRASONIC INSPECTION OF WELL BORES 审中-公开
    VERFAHREN UND SYSTEM ZUR ULTRASCHALLINSPETION VONBOHRLÖCHERN

    公开(公告)号：EP3108232A1

    公开(公告)日：2016-12-28

    申请号：EP15707435.2

    申请日：2015-02-18

    申请人： Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO

    发明人： HUNTER, Alan Joseph ,  DE SOARES SILVA E MELO MOTA, Mariana ,  VOLKER, Arno Willem Frederik

    IPC分类号： G01N29/04 ,  E21B47/00 ,  G01N29/07 ,  G01N29/42

    CPC分类号： E21B47/0005 ,  E21B33/14 ,  G01N29/043 ,  G01N29/07 ,  G01N29/42 ,  G01N2291/011 ,  G01N2291/0232 ,  G01N2291/0289 ,  G01N2291/2636

    摘要： A well bore is inspected to detect cement defects that can give rise to leakage. The well bore comprises an inner metal pipe. Outside the inner metal pipe its configuration may vary with distance from the top of the well bore in terms of concentric pipes outside the inner metal pipe and presence of cement between the pipes. A probe with is lowered through the inner metal pipe. An ultrasound signal is transmitted from the probe into the inner metal pipe and responses to the transmitted signal are received at a series of ultrasound receivers at different axial positions. A selection of a spatial frequency of waves arriving along the axial direction at the ultrasound receivers and/or the apparent velocity of said waves is retrieved dependent on the configuration. The received responses are band pass filtered accordingly. By selecting the band pass filter dependent on the configuration it becomes possible to detect cement defects well outside the innermost pipe from parameters of the earliest arriving pulse from the filtered reflection signal.

    摘要翻译： 检查井眼以检测可能引起泄漏的水泥缺陷。 井筒包括内金属管。 在内金属管的外部，其构造可以随着距内孔金属管外侧的同心管的距离与井眼顶部的距离以及管之间的水泥的存在而变化。 探头通过内金属管下降。 超声信号从探头传送到内金属管，并且在不同轴向位置处的一系列超声波接收器处接收对发射信号的响应。 取决于配置，检索在超声波接收机处沿轴向到达的波的空间频率和/或所述波的表观速度的选择。 所接收的响应相应地进行带通滤波。 通过选择取决于配置的带通滤波器，可以从最近的入射脉冲从最近的反射信号的参数中检测出最外层的水泥缺陷。