公开(公告)号：US20040243329A1

公开(公告)日：2004-12-02

申请号：US10782960

申请日：2004-02-23

申请人： TMT & D Corporation

发明人： Kempei Seki

IPC分类号： G01R023/00

CPC分类号： G01R19/2506 ,  G01R23/02

摘要： A frequency measuring device can measure the frequency of a noisy power system at high speed. The system voltage is measured at timings obtained by equally dividing one reference-wave period. Voltage vectors are calculated which have tip ends, each voltage vector consisting of a real part of a first measured voltage and an imaginary part of another voltage measured at timing 90 degrees before the first measured voltage. The length of a chord connecting tip ends of adjacent voltage vectors is calculated. A voltage root-mean-square value is calculated from voltages measured between two timings spaced from each other by the one reference-wave period. Chord lengths obtained between two timings spaced from each other by the one reference-wave period are summed. Based on the total of the chord lengths and the voltage root-mean-square value, there is calculated a phase angle between two adjacent voltage vectors, from which the system frequency is calculated.

摘要翻译： 频率测量装置可以高速测量噪声电力系统的频率。 在通过等分一个参考波周期获得的定时测量系统电压。 计算具有尖端的电压矢量，每个电压矢量由第一测量电压的实部和在第一测量电压之前90度测量的另一电压的虚部组成。 计算连接相邻电压矢量的末端的弦的长度。 根据在一个参考波周期彼此间隔的两个定时之间测量的电压来计算电压均方根值。 在两个相互间隔一个参考波周期的定时之间获得的弦长被相加。 基于弦长和电压均方根的总和，计算出两个相邻电压矢量之间的相位角，从中计算出系统频率。

公开(公告)号：US20030151400A1

公开(公告)日：2003-08-14

申请号：US10075754

申请日：2002-02-14

发明人： Anthony Petrovich ,  John R. Williams ,  Christopher E. Dube

IPC分类号： G01R023/00

CPC分类号： G01N29/036 ,  G01D3/06 ,  G01H13/00 ,  G01N2291/0256

摘要： A sensor readout circuit which provides a frequency signal output including a phase detector circuit responsive to an output signal from a sensor and an input signal to the sensor and configured to detect the phase difference between the input signal and the output signal, and a drive circuit responsive to the phase detector circuit and configured to maintain a fixed phase difference between the input signal and the output signal.

摘要翻译： 传感器读出电路，其提供频率信号输出，所述频率信号输出包括响应于来自传感器的输出信号的相位检测器电路和对所述传感器的输入信号，并且被配置为检测所述输入信号和所述输出信号之间的相位差;以及驱动电路 响应于相位检测器电路并且被配置为保持输入信号和输出信号之间的固定相位差。

公开(公告)号：US20030122534A1

公开(公告)日：2003-07-03

申请号：US10034643

申请日：2001-12-28

申请人： NOKIA CORPORATION

发明人： Pauli Seppinen ,  Aarno Parssinen ,  Mikael Gustafsson

IPC分类号： G01R023/00 ,  G01R023/08

CPC分类号： H04B1/1027 ,  H04B1/109

摘要： An intermodulation detector (11) that operates standalone or in parallel with a radio receiver (10) of a radio receiver system (100) including a receiver tuning logic module (12), and, in the case of operating standalone, provides signals conveying information about intermodulation power in the receiver frequency band, and in case of operating in parallel with a radio receiver (10), provides to the receiver tuning logic module signals conveying information about power aliasing into the frequency band to which the radio receiver is tuned.

摘要翻译： 一种与包括接收机调谐逻辑模块（12）的无线电接收机系统（100）的无线电接收机（10）独立或并行运行的互调检测器（11），并且在独立操作的情况下，提供传送信息的信号 关于接收机频带中的互调功率，以及在与无线电接收机（10）并行操作的情况下，向接收机调谐逻辑模块提供将有关电力混叠的信息传送到无线电接收机调谐到的频带中的信号。

公开(公告)号：US20020097038A1

公开(公告)日：2002-07-25

申请号：US09770797

申请日：2001-01-23

发明人： John R. Vig ,  Arthur Ballato

IPC分类号： G01R023/00 ,  G01R023/08

CPC分类号： G01N23/20

摘要： Methods are provided for determining deviations from nullnull0null in test resonators based on the quasi-pure modes' displacement ratio variations with 4 angle. A direct relationship between deviation from nullnull0null and the c-mode displacement ratio has been observed, so that the larger the deviation from nullnull0null, then the larger is the change in the normalized frequency of the c-mode upon immersion in, or contact with, a fluid. The method comprises measuring null and null angles in reference resonators with different small null angles and quasi-pure mode frequencies of reference resonators in both air and a test fluid at ambient temperatures, calculating the normalized frequency changes between the air and fluid measurements as a reference point, measuring the test resonator in air then in the fluid and comparing the results. Also provided are similar methods for measuring the null angles in the quasi-pure mode of near-BT-cut resonator plates and the LGX family of rotated-y-cut ZTC crystal resonators, so that the appropriate modes' displacement ratio variations with the null angle determine deviations from nullnull0null. In the preferred method of this invention the test fluid used for measuring a reference fluid quasi-pure mode frequency is pure water at ambient temperature.

摘要翻译： 提供了基于准纯模式的4角度的位移比变化来确定测试谐振器中与phi = 0的偏差的方法。 已经观察到与phi = 0的偏离和c模式位移比之间的直接关系，使得与phi = 0的偏差越大，则沉浸在c模式中的归一化频率的变化越大， 或与流体接触。 该方法包括在空气中的参考谐振器和环境温度下的测试流体中具有不同小phi角和准纯模式频率的参考谐振器中的theta和phi角度，计算空气和流体测量之间的归一化频率变化作为参考 点，测量空气中的测试谐振器，然后在流体中并比较结果。 还提供了用于测量近BT切割谐振器板和LGX系列旋转Y切割ZTC晶体谐振器的准纯模式中的phi角的类似方法，使得适当的模式与phi的位移比变化 角度确定与phi = 0的偏差。 在本发明的优选方法中，用于测量参考流体准纯模式频率的测试流体是环境温度下的纯水

公开(公告)号：US20020074988A1

公开(公告)日：2002-06-20

申请号：US10033118

申请日：2001-10-26

申请人： Thomas & Betts International, Inc.

发明人： Timothy R. Taylor

IPC分类号： G01R023/00 ,  G01R023/12

CPC分类号： G01R25/00

摘要： Method and apparatus for accurately determining the presence of voltage at capacitive test points and for determining the phase angle relationship between two capacitive points. The detection of the presence of the voltage at the capacitive test points is independent of the voltage range in the systems, independent of the contamination or defects that may occur in the capacitive test point systems. The phase angle relationship is determined based on the actual phase angle difference between the voltage waveforms at the capacitive test points independent of the capacitive divider ratio difference and the capacitive test point voltage accuracy.

摘要翻译： 用于精确地确定电容测试点处电压的存在并确定两个电容点之间的相位角关系的方法和装置。 检测电容测试点处电压的存在与系统中的电压范围无关，与电容测试点系统中可能发生的污染或缺陷无关。 相位角关系是根据电容测试点上的电压波形之间的实际相位角差，与电容分压比和电容测试点电压精度无关来确定的。

公开(公告)号：US20010005131A1

公开(公告)日：2001-06-28

申请号：US09737286

申请日：2000-12-13

申请人： Fluke Precision Measurement Ltd

发明人： Simon Timothy Hollingworth

IPC分类号： G01R023/00

CPC分类号： G01R35/005 ,  G01R35/002

摘要： The present invention relates to electronic calibration equipment for verifying the high frequency characteristics of electronic test equipment, including oscilloscopes and time interval analyzers. An electronic circuit (40) for generating an electronic fast edge waveform (109,110) of selectable amplitude comprises: a waveform output (102) from the circuitry; a plurality of attenuation stages (124-127), the attenuation stages being connected without any switching elements to each other to form a cascaded series of attenuation stages leading to the waveform output (102) and each of the attenuation stages (124-127) in the series being bounded by circuit nodes (115,132,133,134,135); one or more pulse generators (105) for producing an unattenuated source of the fast edge waveform (105,106); and means for selectively applying the fast edge waveform source to a corresponding selected one of the circuit nodes so that the fast edge waveform propagates from the selected circuit node (115,132,133,134,135) through a selected number of attenuation stages (124-127) to the waveform output (102) thereby attenuating the fast edge waveform (109,110) to a selected amplitude.

摘要翻译： 本发明涉及用于验证电子测试设备的高频特性的电子校准设备，包括示波器和时间间隔分析仪。 一种用于产生可选幅度的电子快速边缘波形（109,110）的电子电路（40）包括：来自电路的波形输出（102）; 多个衰减级（124-127），所述衰减级彼此连接而没有任何开关元件，以形成级联的一系列衰减级，导致波形输出（102）和衰减级（124-127）中的每一个衰减级 该系列由电路节点（115,132,133,134,135）限定; 用于产生快速边缘波形（105,106）的未衰减源的一个或多个脉冲发生器（105）; 以及用于选择性地将快速边缘波形源施加到相应的所选择的一个电路节点的装置，使得快速边缘波形从所选择的电路节点（115,132,133,134,135）传播通过选定数量的衰减级（124-127）到波形输出 （102），从而将快速边缘波形（109,110）衰减到所选择的幅度。

公开(公告)号：US20040122599A1

公开(公告)日：2004-06-24

申请号：US10733598

申请日：2003-12-11

发明人： Jon Opsal ,  Hanyou Chu

IPC分类号： G01R023/00 ,  G06F019/00

CPC分类号： G03F7/70616 ,  G01B11/24 ,  G01N21/211 ,  G03F7/705 ,  G03F7/70625

摘要： A system for characterizing periodic structures formed on a sample on a real time basis is disclosed. A multi-parameter measurement module generates output signals as a function of either wavelength or angle of incidence. The output signals are supplied to a parallel processor. The processor creates an initial theoretical model and then calculates the theoretical optical response of that sample. The calculated optical response is compared to measured values. Based on the comparison, the model configuration is modified to be closer to the actual measured structure. The processor recalculates the optical response of the modified model and compares the result to the measured data. This process is repeated in an iterative manner until a best fit is achieved. The steps of calculating the optical response of the model is distributed to the processors as a function of wavelength or angle of incidence so these calculations can be performed in parallel.

摘要翻译： 公开了一种用于表征实时地在样品上形成的周期性结构的系统。 多参数测量模块产生作为波长或入射角的函数的输出信号。 输出信号被提供给并行处理器。 处理器创建一个初始理论模型，然后计算该样本的理论光学响应。 将计算出的光学响应与测量值进行比较。 基于比较，模型配置被修改为更接近实际的测量结构。 处理器重新计算修改模型的光学响应，并将结果与​​测量数据进行比较。 以迭代的方式重复该过程，直到达到最佳拟合。 计算模型的光学响应的​​步骤作为波长或入射角分布到处理器，因此可以并行执行这些计算。

公开(公告)号：US20040083067A1

公开(公告)日：2004-04-29

申请号：US10685639

申请日：2003-10-15

发明人： David Alexander Bisset

IPC分类号： G01R023/00

CPC分类号： H04J3/1611 ,  H03B29/00 ,  H04J2203/0062 ,  H04L1/205 ,  H04L1/242

摘要： A method generating wander noise includes predefining frequency, amplitude and phase values for each of a plurality of tones for various predefined frequency profiles. A digital noise signal having a particular profile can then be generated by a summation of a plurality of tones based on the predefined frequency, amplitude and phase values for each of the plurality of tones for the selected profile. The wander noise signal is then generated from the digital noise signal.

摘要翻译： 产生漂移噪声的方法包括预定义用于各种预定频率分布的多个音调中的每一个的频率，振幅和相位值。 然后可以基于针对所选择的简档的多个音调中的每一个的预定义的频率，幅度和相位值，通过多个音调的求和来产生具有特定简档的数字噪声信号。 然后从数字噪声信号产生漂移噪声信号。

公开(公告)号：US20040041554A1

公开(公告)日：2004-03-04

申请号：US10398153

申请日：2003-04-01

发明人： Kouji Miyauchi

IPC分类号： G01R023/00

CPC分类号： G01R23/173

摘要： A preselector is omitted in a spectrum analyzer, for example, which is used to prevent an image signal from being inputted. In addition, an image signal of a signal which is located outside a range of set-up measured frequencies is suppressed as much as possible. For a range of set-up measured frequencies F1nullF2, and for each of a plurality of intermediate frequencies Fi, the frequency of the sweep signal is swept over a range F1nullFinullF2nullFi to determine first measured data, and is also swept over a range F1-FinullF2-Fi to determine second measured data. The first and the second measured data are compared against each other for each measured frequency point, and if they are equal, the data value obtained or a data value having a minimum value unless they are not of an equal value is delivered to obtain measured data in which image data based on image signals has been suppressed.

摘要翻译： 例如，在用于防止图像信号被输入的频谱分析仪中省略了预选器。 此外，尽可能地抑制位于设定的测量频率范围之外的信号的图像信号。 对于一系列设置测量频率F1〜F2，并且对于多个中间频率Fi中的每一个，扫描信号的频率在范围F1 + Fi〜F2 + Fi之间扫描以确定第一测量数据，并且是 也扫过F1-Fi〜F2-Fi范围以确定第二个测量数据。 对于每个测量的频点，第一和第二测量数据彼此进行比较，并且如果它们相等，则输出所获得的数据值或具有最小值的数据值，除非它们不是相等的值，以获得测量数据 其中基于图像信号的图像数据被抑制。

公开(公告)号：US20030154041A1

公开(公告)日：2003-08-14

申请号：US10241390

申请日：2002-09-04

发明人： Donald R. McGaughey ,  Mohammed Tarbouchi ,  Ken Nutt

IPC分类号： G01R023/00 ,  G01P003/00

CPC分类号： H02P21/18

摘要： A method to estimate motor speed for extended stabilized rotational control of an induction motor at all speeds including slow speeds. The speed estimator supplies real-time motor control feedback information for a variable speed motor drive controller without a mechanical encoder. The speed estimator is based on an optimized fast orthogonal search algorithm with control of the carrier drive frequency to reduce computation time. The reduced processing time provides for an update rate to the motor controller sufficient to maintain motor stability to near zero the motor rated base speed.

摘要翻译： 一种估计电机速度的方法，用于在包括慢速的所有速度下对感应电机进行扩展的稳定旋转控制。 速度估计器为不带机械编码器的变速电机驱动控制器提供实时电机控制反馈信息。 速度估计器基于优化的快速正交搜索算法，具有对载波驱动频率的控制以减少计算时间。 减少的处理时间提供了电机控制器的更新速率，足以将电机稳定性保持在接近零电机额定基准速度。