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    • 10. 发明申请
    • NON DESTRUCTIVE TESTING APPARATUS AND METHOD USING ULTRASOUND IMAGING
    • 非破坏性测试装置和使用超声成像的方法
    • WO2013006046A1
    • 2013-01-10
    • PCT/NL2012/050465
    • 2012-06-29
    • NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNOHUNTER, Alan JosephVOLKER, Arno Willem Frederik
    • HUNTER, Alan JosephVOLKER, Arno Willem Frederik
    • G01N29/06G01N29/07G01S15/89
    • G01N29/07G01N29/069G01N2291/044G01S7/52049G01S15/8915G01S15/8952
    • 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.
    • 针对具有传播方向依赖的超声波传播速度或由于纤维状,粗粒状或单晶材料引起的位置相关超声传播速度的结构,提供改进的成像。 在被测结构中选择设定的反射点,并且计算一方面的反射点或者点之间的超声波传播时间延迟,另一方面计算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,通过对从不同发射传感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。