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    • 95. 发明授权
    • Apparatus and method for ultrasonic spectroscopy testing of materials
    • 材料超声波光谱测试仪器及方法
    • US5591913A
    • 1997-01-07
    • US241862
    • 1994-05-12
    • James R. Tucker
    • James R. Tucker
    • G01N29/44G01N29/12G01N29/34G01N29/46G01N29/04
    • G01N29/348G01N29/12G01N29/346G01N29/46G01N2291/044
    • An apparatus and method for performing ultrasonic spectroscopy provides for rapid evaluation of test materials with good amplitude, balanced response at all test frequencies. A swept frequency signal is generated which is applied to a transmit transducer coupled to a test part. A receive transducer provides a detected signal that is fully digitized for real-time or post signal processing. The created swept frequency signal can be equalized from data obtained from direct coupling between transmit and receive transducers. The resultant data is analyzed for amplitude and/or phase information as a function of frequency and can be used to analyze filter characteristics, identify resonances, characterize material signatures and many other applications.
    • 用于执行超声波光谱的装置和方法提供了在所有测试频率下具有良好振幅,平衡响应的测试材料的快速评估。 产生扫描频率信号,其被施加到耦合到测试部件的发射换能器。 接收传感器提供完全数字化的检测信号,用于实时或后置信号处理。 创建的扫频信号可以从从发射和接收换能器之间的直接耦合获得的数据相等。 分析结果数据作为频率的函数的幅度和/或相位信息,并可用于分析滤波器特性,识别共振,表征材料签名和许多其他应用。
    • 98. 发明授权
    • Method and apparatus for measuring the tensile strength of powders
    • 用于测量粉末抗拉强度的方法和装置
    • US5386731A
    • 1995-02-07
    • US149130
    • 1993-11-05
    • Duane H. PontiusTodd R. Snyder
    • Duane H. PontiusTodd R. Snyder
    • G01N3/00G01N3/56G01N15/00G01N33/00G01N3/08
    • G01N3/565G01N15/00G01N2033/0091G01N2203/0017G01N2203/005G01N2203/0087
    • A method and apparatus for measuring the tensile strength of aggregate material comprising a device in which a layer of dust is applied to a metal electrode, and an electric field is applied in such a way as to induce a charge (negative or positive) on the outer surface of the dust layer. The electric field is then increased until particles break away from the upper surface as a result of the electrostatic force acting on the induced charge. From the balance of forces between the electrostatic (which is easily calculated from the configuration and applied voltage) and the cohesive attraction between the particles, the tensile force of the dust layer is determined. The breakaway point may be observed directly, or it may be detected by a photoelectric device designed to respond to light scattered by the particles as they are lofted from the surface. Alternatively, the breakaway point may be detected by sensing an electric current concomitant with the ejection of surface charge residing in the lofted particles.
    • 一种用于测量聚集体材料的拉伸强度的方法和装置,包括其中将灰尘层施加到金属电极的装置,并且以这样的方式施加电场,以在所述装置上引入电荷(负或正) 粉尘层的外表面。 然后由于作用在感应电荷上的静电力,电场增加直到颗粒从上表面脱离。 从静电(容易从配置和施加电压计算)与颗粒之间的内聚吸引力之间的力的平衡,确定了粉尘层的拉伸力。 可以直接观察分离点,或者可以通过设计成响应于颗粒从表面放出的散射的光的光电装置来检测。 或者,可以通过感测电流来检测分离点,伴随着位于放样颗粒中的表面电荷的喷射。