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65 条记录 (耗时 0.028 秒)

    Method for accounting for clamp expansion in a coefficient of thermal expansion measurement
    43.
    发明授权
    Method for accounting for clamp expansion in a coefficient of thermal expansion measurement 失效
    用于计算热膨胀系数测量中夹具膨胀的方法

    公开(公告)号：US06672759B2

    公开(公告)日：2004-01-06

    申请号：US09112593

    申请日：1998-07-09

    申请人： Claudius Feger

    发明人： Claudius Feger

    IPC分类号： G01N2516

    CPC分类号： G01N25/16

    摘要： The present invention is a method to eliminate the influence of clamp dimensional changes on the displacement measurement during the measurement of the coefficient of thermal expansion (CTE) of samples in tension. In a first embodiment clamp dimensional changes can be eliminated by making clamps from a material with near zero CTEs. In another embodiment clamp dimensional changes can be reduced by minimizing the CTE of the clamp material. Finally clamp dimensional changes are taken into account. This is achieved directly by subtracting a prerecorded baseline from the measurements; or by determining the CTE measurement for various sample lengths and obtaining the slope of a straight line through the points on a MD (measured displacement)/DT (temperature range of displacement measurement) versus sample length plot. The slope is the corrected CTE. Clamp dimensional changes can also be taken into account indirectly by obtaining a clamp displacement contribution (CDC) factor which allows to correct measured displacements to result the correct CTE.

    摘要翻译： 本发明是一种在拉伸样品的热膨胀系数（CTE）测量期间消除夹具尺寸变化对位移测量的影响的方法。 在第一实施例中，可以通过从具有接近零CTE的材料制造夹具来消除尺寸变化。 在另一个实施例中，可以通过使夹紧材料的CTE最小化来减小尺寸变化。 最后夹紧尺寸变化被考虑在内。 这是通过从测量中减去预先记录的基线直接实现的; 或通过确定各种样品长度的CTE测量，并通过MD（测量位移）/ DT（位移测量的温度范围）与样品长度图获得直线的斜率。 斜率是校正后的CTE。 也可以通过获得钳位位移贡献（CDC）因子间接考虑钳位尺寸变化，这允许校正测量的位移以产生正确的CTE。

    Method and apparatus for thermally induced testing of materials under transient temperature
    48.
    发明授权
    Method and apparatus for thermally induced testing of materials under transient temperature 失效
    在瞬态温度下对材料进行热诱导测试的方法和装置

    公开(公告)号：US07516674B1

    公开(公告)日：2009-04-14

    申请号：US12198479

    申请日：2008-08-26

    申请人： Claudius Feger ,  Soojae Park

    发明人： Claudius Feger ,  Soojae Park

    IPC分类号： G01N19/08

    CPC分类号： G01N3/60 ,  G01N2203/0066 ,  G01N2203/0073 ,  G01N2203/027

    摘要： A method for measuring the fracture and fatigue crack growth behavior of a material includes heating at least one sample having a first end and a second end and a pre-applied crack between the first end and the second end; heating a fixture having a lower coefficient of thermal expansion than said at least one sample; attaching the first end and the second end of the at least one sample to the fixture; cooling the at least one sample and fixture; recording the temperature at which propagation of the pre-applied crack through the width of the at least one sample occurs as the critical fracture temperature; for a plurality of samples, each sample having a different ratio of pre-applied crack length to sample width, determining the critical fracture temperature as a function of said ratio; and ranking materials by the critical fracture temperature.

    摘要翻译： 用于测量材料的断裂和疲劳裂纹扩展行为的方法包括加热至少一个具有第一端和第二端的样品和在第一端和第二端之间的预应力裂纹; 加热具有比所述至少一个样品更低的热膨胀系数的固定装置; 将所述至少一个样品的第一端和第二端附接到所述夹具; 冷却至少一个样品和固定装置; 记录预先施加的裂纹的传播通过至少一个样品的宽度的温度作为临界断裂温度; 对于多个样品，每个样品具有不同的预先施加的裂纹长度与样品宽度的比率，确定临界裂纹温度作为所述比例的函数; 并按临界断裂温度对材料进行排序。

    APPARATUS AND METHODS FOR REMAKEABLE CONNECTIONS TO OPTICAL WAVEGUIDES
    49.
    发明申请
    APPARATUS AND METHODS FOR REMAKEABLE CONNECTIONS TO OPTICAL WAVEGUIDES 审中-公开
    用于与光波导重新连接的装置和方法

    公开(公告)号：US20090080833A1

    公开(公告)日：2009-03-26

    申请号：US12189143

    申请日：2008-08-09

    申请人： Claudius Feger ,  Philip O. D. Hobbs ,  Maurice McGlashan-Powell

    发明人： Claudius Feger ,  Philip O. D. Hobbs ,  Maurice McGlashan-Powell

    IPC分类号： G02B6/26 ,  G02B6/02 ,  G02B6/36

    CPC分类号： G02B6/2821 ,  G02B6/02 ,  G02B6/02033 ,  G02B6/03622 ,  G02B6/283 ,  G02B6/29316 ,  G02B6/421 ,  G02B6/4249

    摘要： A single-mode optical waveguide with a core, surrounded by a cladding consisting of an inner soft layer and an outer harder layer is described. The outer layer has a grating structure on its inner surface, whose spatial frequency is the same as that of the guided mode. The thickness of the inner cladding is sufficient to keep the grating outside the mode field in undeformed regions of the waveguide, so that normally no out-coupling of the light results. Connections are made by crossing two such waveguides at an angle and pressing them together. This results in deformation of the two waveguides such that the gratings are brought into proximity with the cores. Light is coupled out of one waveguide and into the other in the deformed region, resulting in a self-aligning optical connection. The out-coupled light propagates normal to the waveguide axis, so errors in the crossing angle cause little change in efficiency. Because the cladding system is sufficiently resilient to recover after deformation, the connection is remakeable.

    摘要翻译： 描述了具有由包含内软层和外硬层的覆层围绕的芯的单模光波导。 外层在其内表面具有光栅结构，其空间频率与导向模式相同。 内包层的厚度足以将光栅保持在波导的未变形区域中的模场外，使得通常不会导致光的外耦合。 通过将两个这样的波导以一定角度交叉并将它们压在一起而形成连接。 这导致两个波导的变形，使得光栅与芯接近。 光从一个波导耦合到变形区域中的另一个，导致自对准光学连接。 输出耦合光垂直于波导轴传播，因此交叉角的误差几乎不会导致效率的变化。 因为包层系统具有足够的弹性以在变形后恢复，所以连接是可重新制造的。