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    • 44. 发明授权
    • Universal narrow band signal conditioner
    • 通用窄带信号调理器
    • US5912829A
    • 1999-06-15
    • US823501
    • 1997-03-25
    • Lawrence Carl Maier
    • Lawrence Carl Maier
    • G06F17/14
    • G06F17/142G06F17/14
    • A system for processing a signal made up of at least one spectral component. The system includes a sampling circuit for periodically sampling the signal to obtain a sequence of discrete data samples representing the signal; and a computational circuit for computing a fast Fourier transform (FFT) of the sequence of discrete data samples to an extent which the FFT is computed using substantially exclusively non-complex arithmetic operations, and for using a resultant portion of the FFT to obtain a phase and amplitude of the at least one spectral component making up the signal.
    • 一种用于处理由至少一个光谱分量组成的信号的系统。 该系统包括一个采样电路,用于对信号进行周期性采样以获得表示该信号的一系列离散数据样本; 以及计算电路,用于计算离散数据样本序列的快速傅里叶变换(FFT)到使用基本上仅非非复数算术运算来计算FFT的程度,并且使用FFT的合成部分来获得相位 以及组成信号的至少一个光谱分量的振幅。
    • 48. 发明授权
    • Fluid gauging apparatus with inductive interrogation
    • 具有感应询问的流体计量装置
    • US5602540A
    • 1997-02-11
    • US245945
    • 1994-05-19
    • William B. Spillman, Jr.
    • William B. Spillman, Jr.
    • G01D5/48G08C19/10
    • G01D5/48
    • A gauging apparatus for fluid containers such as fuel tanks includes a capacitance disposed in the container that changes value based on the volume of fluid in the container; a first antenna disposed below an outer surface of the container and coupled to the capacitance; a second antenna magnetically coupled with the first antenna across a coreless gap; and a gauging circuit coupled to the second antenna and comprising an oscillator for applying an excitation signal at a number of different frequencies to the second antenna, and a signal processing circuit that detects current in the second antenna caused by the excitation signal and by current in the first antenna related to the capacitance value.
    • 用于诸如燃料箱的流体容器的测量装置包括设置在容器中的基于容器中的流体体积改变值的电容器; 第一天线,设置在所述容器的外表面下方并且耦合到所述电容; 第二天线,通过无芯间隙与所述第一天线磁耦合; 以及耦合到所述第二天线的测量电路,并且包括用于向所述第二天线施加多个不同频率的激励信号的振荡器,以及信号处理电路,其检测由所述激励信号引起的所述第二天线中的电流, 第一个天线与电容值有关。