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    • 6. 发明申请
    • COMPOSITE EVALUATION
    • 复合材料评估
    • US20110218743A1
    • 2011-09-08
    • US13122235
    • 2009-10-07
    • Robert Alan SmithRichard E. ChallisMartin J. Mienczakowski
    • Robert Alan SmithRichard E. ChallisMartin J. Mienczakowski
    • G06F19/00G06F17/10G01N29/00
    • G01N29/11G01N29/4418G01N29/46G01N2291/0231
    • A method for evaluating a composite structure includes providing a model of said structure and locally varying a material property to determine complex reflection and transmission coefficients at said locality. From these coefficients at least one ultrasonic response characteristic for said material property can be found and compared to a measured ultrasonic response of a sample to determine a local measure of the material property. This method exploits the fact that certain material properties contribute to the ultrasonic frequency response substantially independently of one another. The frequency response of a region of porosity and of a thick resin layer in particular are evaluated. In one embodiment, the modelled responses are used to provide frequency domain basis functions for material properties, which can in turn be used in a decomposition method.
    • 一种用于评估复合结构的方法包括提供所述结构的模型并且局部地改变材料特性以确定所述位置处的复反射和透射系数。 从这些系数可以找到用于所述材料特性的至少一个超声波响应特性并将其与测量的样品的超声波响应进行比较,以确定材料性质的局部测量。 该方法利用了某些材料性质基本上彼此独立地促成超声波频率响应的事实。 评估孔隙度区域和厚树脂层的频率响应。 在一个实施例中,建模的响应用于为材料属性提供频域基函数,其又可以用于分解方法。
    • 8. 发明申请
    • METHOD AND APPARATUS FOR USING NON-LINEAR GROUND PENETRATING RADAR TO DETECT OBJECTS LOCATED IN THE GROUND
    • 使用非线性地面穿透雷达检测位于地面的物体的方法和装置
    • US20120229321A1
    • 2012-09-13
    • US11758785
    • 2007-06-06
    • Sandor HollyNicholas KoumvakalisRobert Alan Smith
    • Sandor HollyNicholas KoumvakalisRobert Alan Smith
    • G01S13/00
    • G01S13/885F41H11/136G01S7/41G01V3/17
    • A method and apparatus for detecting objects located underground. In one advantageous embodiment, a detection system detects objects having electrical non-linear characteristics located underground. The detection system comprises a transmitter unit, a receiver, and a processor. The transmitter transmits a plurality of pulsed radio frequency signals having a first frequency and a second frequency into a ground. The receiver monitors for a response radio frequency signal having a frequency equal to a difference between the first frequency and a second frequency, wherein the response radio frequency signal is generated by an object having the non-linear conductive characteristics in response to receiving the plurality of electromagnetic signals. The processor is connected to the transmitter unit and the receiver, wherein the processor controls an operation of the transmitter unit and the receiver, wherein the object is detected when the response radio frequency signal is detected by the receiver.
    • 一种用于检测位于地下的物体的方法和装置。 在一个有利的实施例中,检测系统检测具有位于地下的电气非线性特性的物体。 检测系统包括发射器单元,接收器和处理器。 发射机将具有第一频率和第二频率的多个脉冲射频信号发射到地面中。 接收机监视具有等于第一频率和第二频率之间的差的频率的响应射频信号,其中响应于具有非线性导电特性的对象响应于接收到多个 电磁信号。 处理器连接到发射机单元和接收机,其中处理器控制发射机单元和接收机的操作,其中当接收机检测到响应射频信号时检测对象。