公开(公告)号：US4817016A

公开(公告)日：1989-03-28

申请号：US865775

申请日：1986-05-21

申请人： Donald O. Thompson ,  Samuel J. Wormley

发明人： Donald O. Thompson ,  Samuel J. Wormley

IPC分类号： G01N29/06 ,  G01N29/07 ,  G01N29/11 ,  G01N29/44 ,  G01N29/46 ,  G01S15/89 ,  G10K11/35 ,  G01N29/04

CPC分类号： G01N29/4418 ,  G01N29/0618 ,  G01N29/07 ,  G01N29/11 ,  G01N29/46 ,  G01S15/8922 ,  G01S15/8934 ,  G10K11/352 ,  G01N2291/044

摘要： A multi-viewing ultrasound transducer acquisition system for non-destructive evaluation, flaw detection and flaw reconstruction in materials. A multiple transducer assembly includes a central transducer surrounded by a plurality of perimeter transducers, each perimeter transducer having an axis of transmission which can be angularly oriented with respect to the axis of transmission of the central transducer to intersect the axis of transmission of the central transducer. A control apparatus automatically and remotely positions the transducer assembly with respect to the material by a positioning apparatus and adjusts the peGRANT REFERENCEThis invention was conceived and reduced to practice at least in part under a grant from the Department of Energy under Contract No. W-7407-ENG-82.

摘要翻译： 一种用于非破坏性评估，缺陷检测和材料缺陷重建的多观察超声波传感器采集系统。 多个换能器组件包括由多个周边换能器包围的中心换能器，每个周边换能器具有传动轴线，该轴线可相对于中心换能器的变速器轴线成角度地定向，以与中心换能器的变速器轴线相交 。 控制装置通过定位装置自动和远程地相对于材料定位换能器组件，并通过相邻装置调节相对于中心换能器的周边换能器。 本发明首先确定材料的相对参数。 中心和周边换能器，然后通过来自控制装置的指令在相对于材料的期望位置定位并相对于彼此调节，使得每个换能器的时间路径相等。 换能器然后单独运行，或者与彼此的全部或任何组合相结合，以发射和/或接收超声波。 缺陷数据来源于反射超声波。 纠正缺陷数据以解决数据缺陷，然后对数据进行数学计算，以识别和构建主体材料中的缺陷的近似值。 然后记录这些缺陷的近似值以进行目视检查和/或记录。

公开(公告)号：US5269189A

公开(公告)日：1993-12-14

申请号：US477162

申请日：1990-02-08

申请人： Donald O. Thompson ,  David K. Hsu

发明人： Donald O. Thompson ,  David K. Hsu

IPC分类号： G01N29/22 ,  G01N29/00

CPC分类号： G01N29/22 ,  G01N2291/0289

摘要： The invention includes a means and method for transmitting and receiving broadband, unipolar, ultrasonic pulses for ultrasonic inspection. The method comprises generating a generally unipolar ultrasonic stress pulse from a low impedance voltage pulse transmitter along a low impedance electrical pathway to an ultrasonic transducer, and receiving the reflected echo of the pulse by the transducer, converting it to a voltage signal, and passing it through a high impedance electrical pathway to an output. The means utilizes electrical components according to the method. The means and method allow a single transducer to be used in a pulse/echo mode, and facilitates alternatingly transmitting and receiving the broadband, unipolar, ultrasonic pulses.

摘要翻译： 本发明包括用于发送和接收用于超声波检测的宽带单极超声波脉冲的装置和方法。 该方法包括从低阻抗电压脉冲发射机沿着低阻抗电路向超声换能器产生一般单极超声应激脉冲，并由换能器接收脉冲的反射回波，将其转换为电压信号，并将其传递 通过到输出的高阻抗电气通路。 该方法根据该方法利用电气部件。 该装置和方法允许以脉冲/回波模式使用单个换能器，并且有助于交替地发送和接收宽带单极超声波脉冲。

公开(公告)号：US4041774A

公开(公告)日：1977-08-16

申请号：US702254

申请日：1976-07-02

申请人： Winfred L. Morris ,  Donald O. Thompson

发明人： Winfred L. Morris ,  Donald O. Thompson

IPC分类号： G01N29/34 ,  G01S15/88 ,  G01V1/28 ,  G01N29/00

CPC分类号： G01N29/348 ,  G01S15/88 ,  G01V1/28

摘要： Acoustic signals are received, selectively filtered, and digitally processed, e.g., by digitizing an amplitude, the peak of an echo, or the transit time, and the digital data are stored in a memory whose storage cells are associated with particular frequencies. Other acoustical signals are similarly processed but compared with the reference data to obtain a spectral representation of differences or ratios.

摘要翻译： 声信号被接收，选择性地滤波和数字处理，例如通过数字化幅度，回波的峰值或传播时间，并且数字数据被存储在其存储单元与特定频率相关联的存储器中。 类似地处理其它声学信号，但与参考数据进行比较以获得差异或比率的频谱表示。

公开(公告)号：US4961252A

公开(公告)日：1990-10-09

申请号：US447831

申请日：1989-12-08

申请人： David K. Hsu ,  Frank J. Margetan ,  Michael D. Hasselbusch ,  Samuel J. Wormley ,  Michael S. Hughes ,  Donald O. Thompson

发明人： David K. Hsu ,  Frank J. Margetan ,  Michael D. Hasselbusch ,  Samuel J. Wormley ,  Michael S. Hughes ,  Donald O. Thompson

IPC分类号： H01L41/113 ,  G01N29/06 ,  G01N29/24 ,  G01N29/34 ,  H01L41/22 ,  H01L41/24

CPC分类号： G01N29/346 ,  G01N29/0609 ,  G01N29/245 ,  G01N29/2475 ,  H01L41/257 ,  G01N2291/0421 ,  Y10T29/42

摘要： An apparatus and method for nonuniform poling of piezoelectric transducers includes machining one or more indentation into an end of a piezoelectric rod and cutting the rod to present a thickened disk shape. Highly electrically conductive material is deposited on at least the indentations in the one end and on at least portions of the opposite face of the member. One or more electrodes are configured to matingly fit within the indentations on the one face of the disk, with a like number of electrodes being positionable on the opposite face of the material. Electrical power is then applied to the electrodes in desired amounts, polarity, and duration. The indentations vary the electrical field produced within the piezoelectric material to produce nonuniform poling in the material. The thick disk is then cut to remove the indentations and to present a thin, flat two sided disk for installation in a conventional piezoelectric transducer probe. The indentations are selected to produce poling in accordance with desired transducer response profiles such as Gaussian or Bessel functions.

摘要翻译： 一种用于压电换能器非均匀极化的装置和方法包括将一个或多个压痕加工成压电棒的端部并切割该棒以呈现增厚的圆盘形状。 高度导电的材料至少沉积在构件的一端和相对面的至少一部分上的凹部上。 一个或多个电极构造成配合地配合在盘的一个表面上的凹陷中，其中相同数量的电极可定位在材料的相对面上。 然后以期望的量，极性和持续时间将电功率施加到电极。 压痕改变压电材料内产生的电场，以在材料中产生不均匀的极化。 然后将厚盘切割以除去凹陷，并呈现薄的平坦的双面圆盘，以安装在传统的压电换能器探头中。 选择压痕以根据期望的换能器响应曲线（例如高斯或贝塞尔函数）产生极化。

公开(公告)号：US4950990A

公开(公告)日：1990-08-21

申请号：US383801

申请日：1989-07-21

申请人： John C. Moulder ,  James H. Rose ,  Donald O. Thompson

发明人： John C. Moulder ,  James H. Rose ,  Donald O. Thompson

IPC分类号： G01R35/00

CPC分类号： B82Y15/00 ,  G01R35/00 ,  G01R35/005

摘要： A system for photoinductive imaging for flaw detection of materials and for calibrating eddy-current probes includes positioning an eddy-current probe adjacent to a specimen to be analyzed or to be used as a calibration fixture. A source of thermal energy is modulated and focused to a localized area on the specimen. Thermal energy is then scanned across at least a portion of the detection area of the eddy-probe. The resulting signal from the eddy-current probe is recorded and can depict either thermal-influenced components of the specimen or the response pattern of the eddy-current probe. The record can therefore be used to image flaws or physical holes or shapes of the specimen or calibrate the eddy-current probe.

摘要翻译： 用于光学感光成像的系统用于材料的探伤和用于校准涡流探针的系统包括将涡流探针定位在待分析样本或用作校准夹具附近。 热能源被调制并聚焦到样品上的局部区域。 然后在涡流探针的检测区域的至少一部分上扫描热能。 记录来自涡流探针的结果信号，并且可以描绘样本的热影响分量或涡流探针的响应模式。 因此，记录可用于图像样品的缺陷或物理孔或形状或校准涡流探针。

公开(公告)号：US4810462A

公开(公告)日：1989-03-07

申请号：US156794

申请日：1988-02-17

申请人： David K. Hsu ,  Donald O. Thompson

发明人： David K. Hsu ,  Donald O. Thompson

IPC分类号： B22F5/10

CPC分类号： B22F5/10

摘要： The method for fabricating a metal body having a flaw of predetermined size and shape located therein comprises placing half of the metal powder required to make the metal body in the die of a press and pressing it to create a flat upper surface thereon. A piece of copper foil is cut to the size and shape of the desired interior crack and placed on the upper surface of the powder and centered in position. The remaining powder is then placed in the die to cover the copper foil. The powder is first cold pressed and removed from the press. The powder metal piece is then sintered in a furnace at a temperature above the melting point of the copper and below the melting point of the metal. It is then removed from the furnace, cooled to room temperature, and placed back in the die and pressed further. This procedure results in an interior flaw or crack. Modified forms of the method involve using a press-sinter-press-sinter cycle with the first sinter being below the melting point of the copper and the second sinter being above the melting point of the copper and below the melting point of the metal.

摘要翻译： 用于制造具有预定尺寸和形状的缺陷的金属体的方法包括将制造金属体所需的金属粉末的一半放置在压模的模具中并将其压制以在其上形成平坦的上表面。 将一块铜箔切割成所需内部裂纹的尺寸和形状，并放置在粉末的上表面上并居中。 然后将剩余的粉末放置在模具中以覆盖铜箔。 粉末首先被冷压并从压机中取出。 然后将粉末金属片在高于铜的熔点并低于金属熔点的温度下在炉中烧结。 然后将其从炉中取出，冷却至室温，并放回模具中并进一步压制。 该过程导致内部缺陷或裂纹。 该方法的改进形式包括使用压坯 - 烧结 - 烧结循环，其中第一烧结体低于铜的熔点，第二烧结体高于铜的熔点并低于金属的熔点。

公开(公告)号：US3688252A

公开(公告)日：1972-08-29

申请号：US3688252D

申请日：1970-09-29

申请人： DONALD O THOMPSON

发明人： THOMPSON DONALD O

IPC分类号： G01C21/00 ,  G01C21/22 ,  G01S1/02 ,  G01S19/48 ,  G08C21/00

CPC分类号： G01C21/22 ,  G01C21/00 ,  G01S1/02

摘要： Herein described is a navigational system which includes apparatus for simultaneously displaying discrete navigational coordinate signals and recording these coordinate signals on a moving memory at predetermined time intervals as the vehicle navigates along a path. Thus, the path is permanently recorded for future use. During or at the end of the vehicle''s outgoing voyage, the memory is applied to a display device which may include a transparent map overlay. The discrete coordinate signals are then displayed on the display, displaying the navigational discrete coordinates on the display, so that the operator may steer the vessel over an exact return path. Alternatively, the memory may be used with an appropriate autopilot so that the vessel returns to any point or completely traverses in reverse the initial outgoing course.

摘要翻译： 这里描述的是一种导航系统，其包括当车辆沿着路径导航时，以预定的时间间隔同时显示离散导航坐标信号并将这些坐标信号记录在移动存储器上的装置。 因此，该路径被永久记录以供将来使用。 在车辆离境航行期间或结束时，存储器被应用于可以包括透明地图叠加层的显示设备。 然后将离散的坐标信号显示在显示器上，在显示器上显示导航的离散坐标，使得操作者可以在精确返回路径上引导容器。 或者，存储器可以与合适的自动驾驶仪一起使用，使得容器返回到任何点或完全相反地穿过初始输出路线。

公开(公告)号：US5199299A

公开(公告)日：1993-04-06

申请号：US667437

申请日：1991-03-11

申请人： Michael S. Hughes ,  David K. Hsu ,  Donald O. Thompson ,  Samuel J. Wormley

发明人： Michael S. Hughes ,  David K. Hsu ,  Donald O. Thompson ,  Samuel J. Wormley

IPC分类号： B06B1/02 ,  G01S7/52 ,  G01S7/526

CPC分类号： G01S7/52025 ,  B06B1/0215 ,  G01S7/526 ,  G01N2291/044 ,  Y10S367/903

摘要： An ultrasonic unipolar pulse/echo instrument uses active switches and a timing and drive circuitry to control electrical energy to a transducer, the discharging of the transducer, and the opening of an electrical pathway to the receiving circuitry for the returning echoes. The active switches utilize MOSFET devices along with decoupling circuitry to insure the preservation of the unipolar nature of the pulses, insure fast transition times, and maintain broad band width and time resolution. A housing contains the various circuitry and switches and allows connection to a power supply and a movable ultrasonic transducer. The circuitry maintains low impedance input to the transducer during transmitting cycles, and high impedance between the transducer and the receiving circuit during receive cycles to maintain the unipolar pulse shape. A unipolar pulse is valuable for nondestructive evaluation, a prime use for the present instrument.

摘要翻译： 超声波单极脉冲/回波仪器使用有源开关和定时和驱动电路来控制换能器的电能，换能器的放电以及向接收电路打开电路以返回回波。 有源开关利用MOSFET器件与去耦电路一起确保保持脉冲的单极性，确保快速的转换时间，并保持宽带宽和时间分辨率。 外壳包含各种电路和开关，并允许连接电源和可移动的超声换能器。 该电路在传输周期期间保持对传感器的低阻抗输入，以及在接收周期期间换能器与接收电路之间的高阻抗以保持单极脉冲形状。 单极脉冲对于非破坏性评估是有价值的，这是本仪器的主要用途。