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    Method and apparatus for using a two-wave mixing ultrasonic detection in rapid scanning applications
    3.
    发明授权
    Method and apparatus for using a two-wave mixing ultrasonic detection in rapid scanning applications 有权
    在快速扫描应用中使用双波混频超声波检测的方法和装置

    公开(公告)号：US07667851B2

    公开(公告)日：2010-02-23

    申请号：US10060983

    申请日：2002-01-30

    申请人： Marc Dubois ,  Thomas E. Drake ,  Robert J. Filkins ,  Peter W. Lorraine

    发明人： Marc Dubois ,  Thomas E. Drake ,  Robert J. Filkins ,  Peter W. Lorraine

    IPC分类号： G01B11/02

    CPC分类号： G01N29/2418 ,  G01B9/02065 ,  G01B9/02081 ,  G01B11/164 ,  G01B2290/70 ,  G01D5/266 ,  G01N21/453 ,  G01N2291/0427 ,  G01N2291/269

    摘要： The invention is directed to a wave characteristic adjusting device used to compensate for a wave characteristic distortion caused by the scanning motion of a probe beam of a two-wave mixing interferometer. The invention is also directed to an apparatus and method for using the wave characteristic adjusting device in a rapid scanning laser ultrasound testing device. In a rapid scanning laser ultrasound testing device, a laser pulse is directed at periodic points along a path across the surface of a manufactured object. The laser pulse initiates an ultrasonic signal associated with the manufactured object. An interferometer may be used to measure the initiated ultrasonic signal. The interferometer scans a probe beam along a path similar to the sonic initiating laser. A pulse of the probe beam is directed at the manufactured object in the vicinity of the initiating laser pulse while continuously scanning. As a result, the probe beam pulse may exhibit a Doppler shift. This Doppler shift may cause a loss in sensitivity of the two-wave mixing interferometer. The wave characteristic adjusting device may be used to compensate for the Doppler shift, thereby improving the sensitivity of the two-wave mixing interferometer.

    摘要翻译： 本发明涉及一种波特性调节装置，用于补偿由双波混频干涉仪的探测光束的扫描运动引起的波特性失真。 本发明还涉及一种在快速扫描激光超声波检测装置中使用波特性调节装置的装置和方法。 在快速扫描激光超声测试装置中，激光脉冲沿着穿过制造对象表面的路径的周期性点。 激光脉冲启动与制造对象相关联的超声波信号。 可以使用干涉仪来测量所引发的超声波信号。 干涉仪沿着类似于声音启动激光器的路径扫描探测光束。 探头光束的脉冲在连续扫描的同时在起始激光脉冲附近被引导到制造对象。 结果，探测光束脉冲可以表现出多普勒频移。 该多普勒频移可能导致双波混频干涉仪的灵敏度损失。 波特性调整装置可以用于补偿多普勒频移，从而提高双波混频干涉仪的灵敏度。

    System and method of determining porosity in composite materials using ultrasound
    4.
    发明授权
    System and method of determining porosity in composite materials using ultrasound 有权
    使用超声波测定复合材料孔隙度的系统和方法

    公开(公告)号：US06684701B2

    公开(公告)日：2004-02-03

    申请号：US09905444

    申请日：2001-07-13

    申请人： Marc Dubois ,  John B. Deaton, Jr. ,  Peter W. Lorraine ,  Thomas E. Drake, Jr. ,  Robert J. Filkins

    发明人： Marc Dubois ,  John B. Deaton, Jr. ,  Peter W. Lorraine ,  Thomas E. Drake, Jr. ,  Robert J. Filkins

    IPC分类号： G01H100

    CPC分类号： G01N29/30 ,  G01N29/11 ,  G01N29/2418 ,  G01N29/449 ,  G01N29/46 ,  G01N2291/014 ,  G01N2291/0231 ,  G01N2291/0245 ,  G01N2291/0289 ,  G01N2291/0421 ,  G01N2291/044

    摘要： The invention provides for ultrasonically measuring the porosity in a sample composite material by accessing only one side of the sample composite material and includes the steps of measuring a sample ultrasonic signal from the sample composite material, normalizing the sample ultrasonic signal relative to the surface echo of the sample composite material, and isolating a sample back-wall echo signal from the sample ultrasonic signal. A sample frequency spectrum of the sample back-wall ultrasonic signal is then determined. Next, the method and system include the steps of measuring a reference ultrasonic signal from a reference composite material, normalizing the reference ultrasonic signal relative to the surface echo of the reference composite material; and isolating a reference back-wall echo signal from the sample ultrasonic signal. A reference frequency spectrum of the reference back-wall ultrasonic signal is then determined. The invention further includes deriving the ultrasonic attenuation of the sample ultrasonic signal as the ratio of the sample frequency spectrum to the reference frequency spectrum over a predetermined frequency range. Comparing the derived ultrasonic attenuation to predetermined attenuation standards permits evaluating the porosity of the sampled composite material.

    摘要翻译： 本发明提供了通过仅访问样品复合材料的一侧来超声波测量样品复合材料中的孔隙率，并且包括以下步骤：从样品复合材料测量样品超声波信号，使样品超声信号相对于表面回波归一化 样品复合材料，并从样品超声波信号中分离样品后壁回波信号。 然后确定样品后壁超声波信号的采样频谱。 接下来，该方法和系统包括以下步骤：从参考复合材料测量参考超声波信号，使参考超声信号相对于参考复合材料的表面回波标准化; 并从样本超声波信号隔离参考后壁回波信号。 然后确定参考后壁超声波信号的参考频谱。 本发明还包括将样本超声波信号的超声波衰减导出为在预定频率范围内的采样频谱与参考频谱的比率。 将得到的超声波衰减与预定的衰减标准进行比较，可以评估采样的复合材料的孔隙率。

    System and method for laser-ultrasonic frequency control using optimal wavelength tuning
    5.
    发明授权
    System and method for laser-ultrasonic frequency control using optimal wavelength tuning 有权
    使用最佳波长调谐的激光超声波频率控制系统和方法

    公开(公告)号：US06176135B1

    公开(公告)日：2001-01-23

    申请号：US09361768

    申请日：1999-07-27

    申请人： Marc Dubois ,  Peter W. Lorraine ,  Barbara Venchiarutti ,  Robert J. Filkins ,  Anthony S. Bauco

    发明人： Marc Dubois ,  Peter W. Lorraine ,  Barbara Venchiarutti ,  Robert J. Filkins ,  Anthony S. Bauco

    IPC分类号： G01N2904

    CPC分类号： G01N29/348 ,  G01N29/2418 ,  G01N29/34 ,  G01N2291/015 ,  G01N2291/0231 ,  G01N2291/2694

    摘要： A system and method for generating a desired acoustic frequency content in a laser-generated ultrasonic wave emitted from a target in response to a laser pulse. The method includes generating a generation laser pulse using a laser source. An optimal wavelength &lgr;0 for the generation laser pulse is determined using a computer. The optimal wavelength data is determined from material-specific, empirically calculated data stored in a storage device that is accessible to the computer. An optimal laser pulse is generated by shifting the generation laser pulse to the optimal wavelength &lgr;0. The optimal laser pulse is directed to the target to generate the laser-generated ultrasonic wave with the desired frequency content.

    摘要翻译： 一种用于响应于激光脉冲从目标发射的激光产生的超声波中产生期望声频内容的系统和方法。 该方法包括使用激光源产生发生激光脉冲。 使用计算机确定产生激光脉冲的最佳波长lambd0。 从存储在计算机可访问的存储设备中的材料特定的经验计算的数据确定最佳波长数据。 通过将发生激光脉冲移动到最佳波长lambd0来产生最佳激光脉冲。 最佳激光脉冲被引导到目标，以产生具有所需频率含量的激光产生的超声波。

    Method to characterize material using mathematical propagation models and ultrasonic signal
    6.
    发明授权
    Method to characterize material using mathematical propagation models and ultrasonic signal 有权
    使用数学传播模型和超声波信号来表征材料的方法

    公开(公告)号：US07480574B2

    公开(公告)日：2009-01-20

    申请号：US10975560

    申请日：2004-10-28

    申请人： Marc Dubois ,  Peter W. Lorraine ,  Robert J. Filkins

    发明人： Marc Dubois ,  Peter W. Lorraine ,  Robert J. Filkins

    IPC分类号： G06F19/00

    CPC分类号： G01N29/48 ,  G01N29/0645 ,  G01N29/2418 ,  G01N29/4418

    摘要： The invention is directed to a system and method for detecting defects in a manufactured object. These defects may include flaws, delaminations, voids, fractures, fissures, or cracks, among others. The system utilizes an ultrasound measurement system, a signal analyzer and an expected result. The signal analyzer compares the signal from the measurement system to the expected result. The analysis may detect a defect or measure an attribute of the manufactured object. Further, the analysis may be displayed or represented. In addition, the expected result may be generated from a model such as a wave propagation model. One embodiment of the invention is a laser ultrasound detection system in which a laser is used to generate an ultrasonic signal. The signal analyzer compares the measured ultrasonic signal to an expected result. This expected result is generated from a wave propagation model. The analysis is then displayed on a monitor.

    摘要翻译： 本发明涉及一种用于检测制造对象中的缺陷的系统和方法。 这些缺陷可能包括缺陷，分层，空隙，裂缝，裂缝或裂纹等。 该系统利用超声测量系统，信号分析仪和预期结果。 信号分析仪将来自测量系统的信号与预期结果进行比较。 分析可以检测缺陷或测量所制造的对象的属性。 此外，可以显示或表示分析。 此外，可以从诸如波传播模型的模型生成预期结果。 本发明的一个实施例是激光超声波检测系统，其中使用激光来产生超声波信号。 信号分析仪将测量的超声信号与预期结果进行比较。 该预期结果是从波传播模型产生的。 然后将分析显示在监视器上。

    System and method for classification of defects in a manufactured object
    7.
    发明授权
    System and method for classification of defects in a manufactured object 有权
    制造对象中缺陷分类的系统和方法

    公开(公告)号：US06732587B2

    公开(公告)日：2004-05-11

    申请号：US10068255

    申请日：2002-02-06

    申请人： Peter W. Lorraine ,  Marc Dubois ,  Robert J. Filkins ,  Barbara Venchiarutti

    发明人： Peter W. Lorraine ,  Marc Dubois ,  Robert J. Filkins ,  Barbara Venchiarutti

    IPC分类号： G01N2904

    CPC分类号： G01N29/50 ,  G01N29/11 ,  G01N29/4436 ,  G01N29/48 ,  G01N2291/0231 ,  G01N2291/0427 ,  G01N2291/044

    摘要： Ultrasonic testing techniques may involve the measurement of ultrasonic waves from the tested part. These waves may reflect from surfaces of various layers within the part. Further, these waves may reflect from faults, defects, voids, fractures, and others. As such, the measured ultrasonic wave is a complex mix of these reflections. One method for detecting flaws, defects, and others may be to express the signal in terms of a set of basis functions. These functions may be summed to produce the measured signal. Further, basis functions may be chosen such that a select set of the basis functions characterize the fault and/or defect. In one exemplary embodiment, the coefficients associated with the basis function may be non-zero when a defect is present. As such, a defect may be detected quickly and automatically.

    摘要翻译： 超声波测试技术可能涉及从测试部分测量超声波。 这些波可能从部分内各层的表面反射出来。 此外，这些波浪可以从故障，缺陷，空隙，裂缝等反映。 因此，测量的超声波是这些反射的复杂混合。 用于检测缺陷，缺陷等的一种方法可以是基于一组基函数来表达信号。 这些功能可以相加以产生测量信号。 此外，可以选择基础功能，使得基础功能的选择集表征故障和/或缺陷。 在一个示例性实施例中，当存在缺陷时，与基础函数相关联的系数可以是非零。 因此，可以快速且自动地检测到缺陷。

    Method and apparatus for generating specific frequency response for ultrasound testing
    8.
    发明授权
    Method and apparatus for generating specific frequency response for ultrasound testing 有权
    用于产生超声波检测特定频率响应的方法和装置

    公开(公告)号：US06668654B2

    公开(公告)日：2003-12-30

    申请号：US09930015

    申请日：2001-08-15

    申请人： Marc Dubois ,  Peter W. Lorraine ,  Robert J. Filkins

    发明人： Marc Dubois ,  Peter W. Lorraine ,  Robert J. Filkins

    IPC分类号： G01N2904

    CPC分类号： G01N29/341 ,  G01H3/00 ,  G01H9/00 ,  G01N29/2418 ,  G01N29/348 ,  G01N29/50 ,  G01N2291/015

    摘要： A system and method for testing a physical attribute of a manufactured object that includes a laser generator and pulse generator that generate a plurality of Dirac-like pulses. The pulses, directed at an object, cause a sonic signal to be initiated indicative of the physical attribute of the manufactured object, and are detected. The system also controls the width of the Dirac-like pulses and time separation between pulses. A display may also be used to present the detected signal or physical attribute. The Dirac-like pulses are structured to produce a particular output in the manufactured object. The Dirac-like pulses may be altered dynamically in the presence of deviations from the expected output. One embodiment of the Dirac-like pulses is a series of pulses with pulse widths less than 20% a time separation between successive pulses.

    摘要翻译： 一种用于测试制造物体的物理属性的系统和方法，包括产生多个狄拉克脉冲的激光发生器和脉冲发生器。 指向物体的脉冲引起声音信号的起始，指示所制造的物体的物理属性，并且被检测。 该系统还控制狄拉克脉冲的宽度和脉冲之间的时间间隔。 还可以使用显示器来呈现检测到的信号或物理属性。 狄拉克式脉冲被构造成在所制造的物体中产生特定的输出。 在存在与预期输出的偏差的情况下，狄拉克脉冲可以动态地改变。 狄拉克脉冲的一个实施例是脉冲宽度在连续脉冲之间的时间间隔小于20％的一系列脉冲。