公开(公告)号：US4702112A

公开(公告)日：1987-10-27

申请号：US764912

申请日：1985-08-12

申请人： William E. Lawrie ,  Thomas Powers, Jr. ,  Joseph W. Brophy

发明人： William E. Lawrie ,  Thomas Powers, Jr. ,  Joseph W. Brophy

IPC分类号： G01N29/44 ,  G01N29/06 ,  G01N29/34 ,  G01N29/36 ,  G01S7/52 ,  G01N29/04

CPC分类号： G01S7/52057 ,  G01N29/0618 ,  G01N29/343 ,  G01N29/348 ,  G01N29/36 ,  G01N29/4454 ,  G01S7/5203 ,  G01N2291/044

摘要： An ultrasonic apparatus and method for testing a material comprises an oscillator which generates a selected frequency in the ultrasonic range. A transducer is connected to the oscillator for applying an ultrasonic signal to the material and for receiving an echo signal back from the material. Two phase detectors are utilized one of which receives the echo signal and an in-phase oscillator signal to generate a first display signal, and the other of which receives a quadrature signal which is 90.degree. out of phase from the oscillator signal, as well as the echo signal to generate a second display signal. The first and second display signals are utilized in a visual display such as a cathode ray tube, to generate an image. The image changes according to the phase shift between the ultrasonic signal transmitted into the material and the echo signal, which, in turn, can be utilized to determine the presence and depth of a flaw or boundary in the material.

摘要翻译： 用于测试材料的超声波装置和方法包括在超声波范围内产生选定频率的振荡器。 传感器连接到振荡器，用于向材料施加超声波信号并从材料接收回波信号。 使用两相检测器，其中一个接收回波信号和同相振荡器信号以产生第一显示信号，另一个接收来自振荡器信号的90°异相的正交信号，以及 回波信号产生第二显示信号。 第一和第二显示信号用于诸如阴极射线管的视觉显示器中，以产生图像。 图像根据传输到材料中的超声波信号与回波信号之间的相移而发生变化，而回波信号又可用于确定材料中缺陷或边界的存在和深度。

公开(公告)号：US4640132A

公开(公告)日：1987-02-03

申请号：US691599

申请日：1985-01-15

申请人： John H. Flora ,  Thomas Powers, Jr.

发明人： John H. Flora ,  Thomas Powers, Jr.

IPC分类号： G01N29/07 ,  G01N29/265 ,  G01N29/44 ,  G01N29/48 ,  G01N29/04

CPC分类号： G01N29/48 ,  G01N29/07 ,  G01N29/265 ,  G01N29/44 ,  G01N2291/044

摘要： An ultrasonic testing method and apparatus stores the reflected ultrasonic signals from each of a plurality of locations along a scan path over a piece of material to be tested. For each individual location, the reflected signal at that location is added to contributing signals from each other location to produce a composite signal which has a good signal-to-noise ratio. The contributing signals from each other location is formed by multiplying the signal of those other locations by a corrective phase shift factor which is a characteristic of a time delay for a reflected signal from the other locations to the individual location of interest. The contributing signal from each other location thus represents a rotated reflected signal from the other locations.

摘要翻译： 超声波测试方法和装置将来自扫描路径的多个位置中的每一个的反射的超声波信号存储在要测试的一块材料上。 对于每个单独的位置，该位置处的反射信号被加到来自彼此位置的贡献信号，以产生具有良好信噪比的复合信号。 来自每个其他位置的贡献信号通过将那些其他位置的信号乘以校正相移因子而形成，校正相移因子是来自其他位置到感兴趣的个体位置的反射信号的时间延迟的特征。 因此，来自彼此位置的贡献信号表示来自其它位置的旋转的反射信号。