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    Apparatus and method for evaluating the physical properties of a sample using ultrasonics
    2.
    发明授权
    Apparatus and method for evaluating the physical properties of a sample using ultrasonics 失效
    使用超声波评估样品的物理性质的装置和方法

    公开(公告)号：US06532821B2

    公开(公告)日：2003-03-18

    申请号：US09901659

    申请日：2001-07-11

    申请人： Guy Lamouche ,  Andre Moreau ,  Martin Lord ,  Daniel Levesque

    发明人： Guy Lamouche ,  Andre Moreau ,  Martin Lord ,  Daniel Levesque

    IPC分类号： G01N2916

    CPC分类号： G01N29/2418 ,  G01N29/38 ,  G01N29/42 ,  G01N29/4418 ,  G01N29/4472 ,  G01N2291/015 ,  G01N2291/0289

    摘要： A method is disclosed for evaluating the physical properties of a sample, for example, the grain size in a polycrystalline material. An ultrasound field is generated in a local region of the sample with a non-contact source, such as a pulsed laser, such that the generated ultrasound diffuses away from said local region. After waiting until the generated ultrasound field has reached a diffusion regime, the resulting ultrasound field is measured with a non-contact detector. Parameters are adjusted in a mathematical model describing the predicted behaviour of the ultrasound field in the diffusion regime to fit the detected ultrasound field to the mathematical model. In this way, parameters dependent on the physical properties of the sample, such as the diffusion coefficient and absorption coefficient, can be derived. The grain size, for example, can be estimated from these parameters preferably by calibrating the diffusion coefficient to grain size.

    摘要翻译： 公开了用于评估样品的物理性质的方法，例如多晶材料中的晶粒尺寸。 在具有非接触源（例如脉冲激光）的样品的局部区域中产生超声波场，使得所产生的超声波从所述局部区域扩散。 在等待直到产生的超声波场达到扩散方式后，用非接触检测器测量所得的超声波场。 在描述超声场在扩散状态中的预测行为的数学模型中调整参数以将检测到的超声场拟合到数学模型。 以这种方式，可以得出取决于样品的物理性质的参数，如扩散系数和吸收系数。 例如，可以从这些参数估计晶粒尺寸，优选通过将扩散系数校准为晶粒尺寸。

    Method and system for determining material properties using ultrasonic attenuation
    3.
    发明申请
    Method and system for determining material properties using ultrasonic attenuation 有权
    使用超声波衰减确定材料性质的方法和系统

    公开(公告)号：US20070006651A1

    公开(公告)日：2007-01-11

    申请号：US11174496

    申请日：2005-07-06

    申请人： Silvio Kruger ,  Guy Lamouche ,  Daniel Levesque ,  Jean-Pierre Monchalin

    发明人： Silvio Kruger ,  Guy Lamouche ,  Daniel Levesque ,  Jean-Pierre Monchalin

    IPC分类号： G01N29/04

    CPC分类号： G01N29/11 ,  G01N29/2412 ,  G01N29/2418 ,  G01N29/30 ,  G01N29/348 ,  G01N29/4418 ,  G01N29/4436 ,  G01N29/46 ,  G01N29/48 ,  G01N2291/0421 ,  G01N2291/0422 ,  G01N2291/0423 ,  G01N2291/102

    摘要： A method and system is disclosed for determining a property of an object by measuring ultrasonic attenuation. With the proposed method, a measured ultrasonic interaction signal of the object is compared with a reference signal produced using the same generation and detection setup, but using a reference part. The reference ultrasonic signal has low attenuation, and exhibits equivalent diffraction properties as the object, with respect to a broadband ultrasonic pulse. The difference is attributable to the attenuation of the object. The attenuation as a function of frequency, the attenuation spectrum, is fitted to a model to obtain a parameter useful for identifying one of the many properties of an object that varies with ultrasonic attenuation.

    摘要翻译： 公开了一种通过测量超声波衰减来确定物体的性质的方法和系统。 利用所提出的方法，将物体的测量超声波相互作用信号与使用相同的生成和检测设置产生的参考信号进行比较，但使用参考部分。 相对于宽带超声脉冲，参考超声信号具有低衰减，并且表现出与物体相当的衍射特性。 差异归因于物体的衰减。 作为频率的函数的衰减衰减谱被拟合到模型中以获得用于识别通过超声衰减而变化的对象的许多属性之一的参数。

    Method and system for high resolution ultrasonic imaging of small defects or anomalies.
    4.
    发明授权
    Method and system for high resolution ultrasonic imaging of small defects or anomalies. 有权
    用于高分辨率超声成像小缺陷或异常的方法和系统。

    公开(公告)号：US6128092A

    公开(公告)日：2000-10-03

    申请号：US353018

    申请日：1999-07-13

    申请人： Daniel Levesque ,  Alain Blouin ,  Christian Neron ,  Jean-Pierre Monchalin

    发明人： Daniel Levesque ,  Alain Blouin ,  Christian Neron ,  Jean-Pierre Monchalin

    IPC分类号： G01N29/24 ,  G01N29/40 ,  G01N29/42 ,  G01N29/46 ,  G01S15/89 ,  G01B9/02

    CPC分类号： G01S15/8997 ,  G01N29/069 ,  G01N29/2418 ,  G01N29/40 ,  G01N29/42 ,  G01N29/46 ,  G01N2291/015 ,  G01N2291/0422 ,  G01N2291/0423 ,  G01N2291/0427

    摘要： A method and system is provided for enhanced ultrasonic detection and imaging of small defects inside or at the surface of an object. The Synthetic Aperture Focusing Technique (SAFT) has been used to improve the detectability and to enhance images in conventional ultrasonics and this method has recently been adapted to laser-ultrasonics. In the present invention, an improved version of the frequency-domain SAFT (F-SAFT) based on the angular spectrum approach is described. The method proposed includes temporal deconvolution of the waveform data to enhance both axial and lateral resolutions, control of the aperture and of the frequency bandwidth to improve signal-to-noise ratio, as well as spatial interpolation of the subsurface images. All the above operations are well adapted to the frequency domain calculations and embedded in the F-SAFT data processing. The aperture control and the spatial interpolation allow also a reduction of sampling requirements to further decrease both inspection and processing times. This method is of particular interest when ultrasound is generated by a laser and detected by either a contact ultrasonic transducer or a laser interferometer.

    摘要翻译： 提供了一种用于增强物体内部或表面上的小缺陷的超声波检测和成像的方法和系统。 合成孔径聚焦技术（SAFT）已被用于提高常规超声波的可检测性和增强图像，该方法最近适用于激光超声波。 在本发明中，描述了基于角频谱方法的频域SAFT（F-SAFT）的改进版本。 所提出的方法包括波形数据的时间去卷积以增强轴向和横向分辨率，控制孔径和频率带宽以提高信噪比，以及地下图像的空间插值。 所有上述操作都适用于频域计算并嵌入F-SAFT数据处理中。 孔径控制和空间插补还可以减少采样要求，进一步降低检查和处理时间。 当通过激光产生超声波并通过接触式超声换能器或激光干涉仪检测超声波时，该方法是特别有意义的。

    Frontend for universal rendering framework
    5.
    发明授权
    Frontend for universal rendering framework 有权
    前端通用渲染框架

    公开(公告)号：US08134551B2

    公开(公告)日：2012-03-13

    申请号：US12040659

    申请日：2008-02-29

    申请人： Jerome Maillot ,  Andre Gauthier ,  Daniel Levesque

    发明人： Jerome Maillot ,  Andre Gauthier ,  Daniel Levesque

    IPC分类号： G06F17/00 ,  G09G5/00 ,  G06T11/40 ,  G06T1/00 ,  G06K9/40 ,  G06K9/36 ,  G06F7/00 ,  G06F17/30

    CPC分类号： G06T15/005 ,  G06T2210/61 ,  Y10S707/99931

    摘要： Embodiments of the invention provide a renderer-agnostic method for representing materials independently from an underlying rendering engine. Advantageously, materials libraries may be extended with new materials for rendering with an existing rendering engine and implementation. Also, new rendering engines and implementations may be added for existing materials. Thus, at run-time, rather than limiting the rendering to being performed on a pre-determined rendering engine, the rendering application may efficiently and conveniently manage rendering a graphics scene on a plurality of rendering engines or implementations.

    摘要翻译： 本发明的实施例提供了用于独立于底层渲染引擎代表材料的渲染器不可知方法。 有利的是，材料库可以用新材料进行扩展，以便利用现有的渲染引擎和实现来呈现。 此外，可以为现有材料添加新的渲染引擎和实现。 因此，在运行时，渲染应用程序可以有效且方便地管理在多个渲染引擎或实现上渲染图形场景，而不是将渲染限制为在预定渲染引擎上执行。

    Method for creating graphical materials for universal rendering framework
    7.
    发明授权
    Method for creating graphical materials for universal rendering framework 有权
    为通用渲染框架创建图形材料的方法

    公开(公告)号：US09471996B2

    公开(公告)日：2016-10-18

    申请号：US12040725

    申请日：2008-02-29

    申请人： Jerome Maillot ,  Andre Gauthier ,  Daniel Levesque

    发明人： Jerome Maillot ,  Andre Gauthier ,  Daniel Levesque

    IPC分类号： G09G5/00 ,  G06T11/00 ,  G06T15/04 ,  G06F9/44 ,  G06F3/14 ,  G06T15/00

    CPC分类号： G06T11/001 ,  G06F3/14 ,  G06F9/451 ,  G06T15/005 ,  G06T15/04

    摘要： Embodiments of the invention provide a renderer-agnostic method for representing materials independently from an underlying rendering engine. Advantageously, materials libraries may be extended with new materials for rendering with an existing rendering engine and implementation. Also, new rendering engines and implementations may be added for existing materials. Thus, at run-time, rather than limiting the rendering to being performed on a pre-determined rendering engine, the rendering application may efficiently and conveniently manage rendering a graphics scene on a plurality of rendering engines or implementations.

    摘要翻译： 本发明的实施例提供了用于独立于底层渲染引擎代表材料的渲染器不可知方法。 有利的是，材料库可以用新材料进行扩展，以便利用现有的渲染引擎和实现来呈现。 此外，可以为现有材料添加新的渲染引擎和实现。 因此，在运行时，渲染应用程序可以有效且方便地管理在多个渲染引擎或实现上渲染图形场景，而不是将渲染限制为在预定渲染引擎上执行。

    BRUSHLESS DC MOTORIZATION APPARATUS
    8.
    发明申请
    BRUSHLESS DC MOTORIZATION APPARATUS 审中-公开
    无刷直流电动机

    公开(公告)号：US20130119809A1

    公开(公告)日：2013-05-16

    申请号：US13811693

    申请日：2011-07-20

    申请人： Daniel Levesque ,  Jerome Cros

    发明人： Daniel Levesque ,  Jerome Cros

    IPC分类号： H02K1/27

    CPC分类号： H02K21/22 ,  B60L2200/12 ,  B60L2220/46 ,  B62M7/12 ,  H02K1/146 ,  H02K1/187 ,  H02K1/2786 ,  H02K3/18 ,  H02K3/28 ,  H02K7/003 ,  H02K2213/03 ,  Y02T10/641

    摘要： A direct-drive brushless DC motorization apparatus comprises an outer rotor with poles constructed with segments of permanent magnet material alternatively magnetized north and south. The outer rotor is adapted to be part of a wheel and rotating with the wheel about an axis thereof. A stator core of ferromagnetic material is spaced inwardly of said rotor to define a clearance gap with the rotor such that the rotor is rotatable about the stator core. The stator core has forty-two slots and defines teeth therebetween. A three-phase winding with coils of insulated wire is wound around the teeth of the stator core. The three-phase winding is divided in two sets of consecutive teeth for each of the three phases, with each of the two sets of a same phase being diametrically opposed in the stator core.

    摘要翻译： 直驱式无刷直流电动装置包括具有由永磁体材料的段构成的极的外转子，其中永磁体材料的片段被北或南地磁化。 外转子适于作为车轮的一部分并随车轮围绕其轴线旋转。 铁磁材料的定子铁心与所述转子间隔开，以与转子形成间隙，使得转子能绕定子铁心转动。 定子芯具有四十二个槽，并在它们之间形成齿。 具有绝缘线圈的三相绕组缠绕在定子芯的齿上。 对于三相中的每一个，三相绕组分成两组连续的齿，其中相同相的两组中的每组在定子芯中径向相对。

    High resolution ultrasonic interferometry for quantitative mondestructive characterization of interfacial adhesion in multilayer composites
    10.
    发明授权
    High resolution ultrasonic interferometry for quantitative mondestructive characterization of interfacial adhesion in multilayer composites 失效
    高分辨率超声波干涉法用于多层复合材料中界面粘附的定量无损检测

    公开(公告)号：US5408881A

    公开(公告)日：1995-04-25

    申请号：US121367

    申请日：1993-09-15

    申请人： Luc Piche ,  Daniel Levesque

    发明人： Luc Piche ,  Daniel Levesque

    IPC分类号： G01N29/07 ,  G01N29/11 ,  G01N29/42 ,  G01N29/44 ,  G01N29/04

    CPC分类号： G01N29/4418 ,  G01N29/07 ,  G01N29/11 ,  G01N29/42 ,  G01N29/4436 ,  G01N29/4445 ,  G01N2291/0231 ,  G01N2291/02827 ,  G01N2291/0421 ,  G01N2291/0422 ,  G01N2291/0428 ,  G01N2291/102

    摘要： An ultrasonic interferometry technique for composite structures such as metal/polymer/metal structures exhibits high sensitivity to interfacial properties, even at usual ultrasonic wavelengths. A model for the ultrasonic response of multilayered media accounts for viscoelasticity. Results of numerical calculations point out scaling features for interfacial properties in terms of specific stiffness S. A method is provided for characterizing the interfacial adhesion in a multilayer composite in terms of the parameter S. The multilayer composite is ultrasonically irradiated with a pulsed signal to obtain a signal characteristic of the interfacial adhesion between the multilayers. A model is provided of the multilayer composite that includes at least two additional layers which model the behaviour of the interface between the composite layers. From the model, given various input parameters such as thickness of the two additional layers and the viscoelastic properties of the layers, a plurality of spectra, characteristic of interfacial adhesion between the modeled multilayer composite are obtained. The spectrum related to the ultrasonic signal is compared to the plurality of the modeled spectra and a best fit or match is obtained. The value of S relating to the best fit model is determined to be the value which characterizes the interfacial adhesion between layers of the irradiated composite.

    摘要翻译： 用于复合结构例如金属/聚合物/金属结构的超声波干涉技术即使在通常的超声波长下也表现出对界面特性的高灵敏度。 多层介质的超声波响应模型考虑了粘弹性。 数值计算结果表明，在比硬度S方面界面特性的缩放特征。根据参数S，提供一种表征多层复合材料界面粘合性的方法。多层复合材料用脉冲信号超声波照射得到 多层之间界面粘合的信号特征。 提供了多层复合材料的模型，其包括至少两个附加层，其对复合层之间的界面的行为进行建模。 从模型中，给出各种输入参数，例如两个附加层的厚度和层的粘弹性，得到了多个光谱，其中模拟的多层复合材料之间的界面粘合特性。 将与超声波信号相关的光谱与多个建模光谱进行比较，并获得最佳拟合或匹配。 将与最佳拟合模型相关的S的值确定为表征被照射的复合材料的层之间的界面粘合的值。