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29 条记录 (耗时 0.015 秒)

    PULSE MEASUREMENT DEVICE
    21.
    发明申请
    PULSE MEASUREMENT DEVICE 有权

    公开(公告)号：US20210325436A1

    公开(公告)日：2021-10-21

    申请号：US17212132

    申请日：2021-03-25

    申请人： National Cheng Kung University

    发明人： Ching-Lung YANG ,  Chia-Hui CHEN

    IPC分类号： G01R23/04 ,  G01R23/07

    摘要： A pulse measurement device is provided, including a first signal source, a second signal source, two microwave resonators, two mixers, and a signal processing unit. The first signal source and the second signal source output a first high-frequency signal and a second high-frequency signal, respectively. Each of the microwave resonators generates an electric field according to the first high-frequency signal, and senses a variation in the electric field which is interfered by a pulse to obtain a sensing signal. Each of the mixers is coupled to one of the microwave resonators, to mix the sensing signal and the second high-frequency signal to output a down-converted signal. The signal processing unit respectively demodulates amplitudes of the down-converted signals of the two mixers to obtain amplitude signals.

    Measurement System with Resonant Sensors and Method for the Operation of a Resonant Sensor
    24.
    发明申请
    Measurement System with Resonant Sensors and Method for the Operation of a Resonant Sensor 审中-公开
    谐振传感器的测量系统和谐振传感器的操作方法

    公开(公告)号：US20160161388A1

    公开(公告)日：2016-06-09

    申请号：US14957032

    申请日：2015-12-02

    申请人： Alexander Niedermayer

    发明人： Alexander Niedermayer

    IPC分类号： G01N11/16 ,  G01R23/07

    CPC分类号： G01N11/16 ,  G01N29/036 ,  G01N29/34 ,  G01N29/348 ,  G01N29/4472 ,  G01N2009/006 ,  G01R23/07

    摘要： A method to operate a resonator is provided herein. As illustrated with an example, the resonator is excited by means of a periodic excitation signal with an integer number of at least two signal components with one specified frequency each. A response signal of the resonator is determined at the specified frequencies of the at least two signal components of the excitation signal. Eventually, parameters of a model illustrating the behavior of the resonator as a function of the response signal are calculated based on the response signal.

    摘要翻译： 本文提供了一种操作谐振器的方法。 如示例所示，谐振器通过具有整数数量的至少两个具有每个指定频率的信号分量的周期性激励信号激发。 在激励信号的至少两个信号分量的指定频率处确定谐振器的响应信号。 最后，基于响应信号来计算示出作为响应信号的函数的谐振器的行为的模型的参数。

    Apparatus and method for the detection and measurement of liquid water and ice layers on the surfaces of solid materials
    25.
    发明授权
    Apparatus and method for the detection and measurement of liquid water and ice layers on the surfaces of solid materials 失效
    用于检测和测量固体材料表面上液态水和冰层的装置和方法

    公开(公告)号：US5686841A

    公开(公告)日：1997-11-11

    申请号：US572244

    申请日：1995-12-13

    申请人： Larry G. Stolarczyk ,  Gerald Lee Stolarczyk

    发明人： Larry G. Stolarczyk ,  Gerald Lee Stolarczyk

    IPC分类号： G01N22/04 ,  G01R23/07 ,  G01N22/00 ,  G01K27/04

    CPC分类号： G01W1/14 ,  G01N22/04 ,  G01R23/07

    摘要： An embodiment of the present invention is a roadway sensor for surface installation in a hole such that a thin ceramic contact sensor may be used to measure and cross-compare fundamental physical antenna parameters of the space immediately above a roadway or bridge surface. Measurements are combined by a microprocessor to discriminate between dry pavement, water (rain), snow and ice above the sensor head. Ambient surface temperature, water depth and ice/slush conditions are determined to estimate any hydroplaning hazard and ice/antifreeze/water mixtures. The sensor comprises an antenna that exhibits a resonant frequency and an input admittance including a real term; a Maxwell bridge coupled to the antenna for detecting the resonant frequency, input admittance and real term; and a frequency sweeping oscillator for driving the antenna at a plurality of frequencies proximate in frequency to the resonant frequency. A phase sensitive detector determines an attenuation rate and phase and thereby is able to extract a conductivity (.sigma.) and a dielectric (.epsilon.) measurement. The microprocessor relates the conductivity and dielectric measurements to yield, for example, a pair of estimates for ice and water content and layer thickness.

    摘要翻译： 本发明的一个实施例是用于在孔中表面安装的道路传感器，使得可以使用薄陶瓷接触传感器来测量和交叉比较在道路或桥面上方的空间的基本物理天线参数。 测量由微处理器组合，以区分传感器头上方的干燥路面，水（雨），雪和冰。 确定环境表面温度，水深和冰/冰条件以估计任何滑水危险和冰/防冻/水混合物。 传感器包括具有谐振频率的天线和包括实际项的输入导纳; 耦合到天线的麦克斯韦桥，用于检测谐振频率，输入导纳和实际值; 以及用于以频率接近谐振频率的多个频率驱动天线的频率扫描振荡器。 相敏检测器确定衰减速率和相位，从而能够提取电导率（σ）和电介质（ε）测量。 微处理器涉及电导率和电介质测量，以产生例如冰和水含量和层厚度的一对估计。

    Method and apparatus for frequency measurement and adjustment of monolithic crystal filters
    26.
    发明授权
    Method and apparatus for frequency measurement and adjustment of monolithic crystal filters 失效
    用于单片晶体滤波器频率测量和调整的方法和装置

    公开(公告)号：US4733164A

    公开(公告)日：1988-03-22

    申请号：US847699

    申请日：1986-04-03

    申请人： Franz L. Sauerland

    发明人： Franz L. Sauerland

    IPC分类号： G01R29/22 ,  G01R23/07

    CPC分类号： G01R29/22

    摘要： Method and apparatus for measuring the characteristic frequencies of a monolithic crystal filter and for adjusting them to predetermined values, based on selectively transmitting two balanced decoupled signals through the filter to an output signal detector for exciting and measuring the characteristic frequencies.

    摘要翻译： 用于测量单片晶体滤波器的特征频率并用于将它们调整到预定值的方法和装置，其基于通过滤波器选择性地传输两个平衡解耦信号到用于激发和测量特征频率的输出信号检测器。

    Autolock for resonators for frequency standards
    27.
    发明授权
    Autolock for resonators for frequency standards 失效
    自动锁定用于频率标准的谐振器

    公开(公告)号：US4499433A

    公开(公告)日：1985-02-12

    申请号：US289069

    申请日：1981-07-31

    申请人： Robert M. Garvey

    发明人： Robert M. Garvey

    IPC分类号： G01R19/04 ,  G01R23/07 ,  H03L7/26

    CPC分类号： H03L7/26 ,  G01R19/04 ,  G01R23/07 ,  H03L2207/14

    摘要： A system is disclosed for examining the response in atomic and molecular resonators to identify and select the maximum resonant peak and the voltage used to cause said peak to be produced. The system is fabricated of modular elements electrically connected to a circuit board to facilitate its construction and transportation with the resonator. A microprocessor is utilized to perform the analysis and to generate information to select the maximum resonant peak, and the system includes means to compare the value of successively generated resonator outputs and to select the output with the maximum peak.

    摘要翻译： 公开了一种用于检查原子和分子谐振器中的响应以识别和选择用于产生所述峰的最大谐振峰值和电压的系统。 该系统由电连接到电路板的模块化元件制成，以便于其与谐振器的结构和传输。 微处理器用于执行分析并产生信息以选择最大谐振峰值，并且系统包括用于比较连续产生的谐振器输出的值并选择具有最大峰值的输出的装置。