公开(公告)号：US4635746A

公开(公告)日：1987-01-13

申请号：US619099

申请日：1984-06-11

申请人： James J. Lin

发明人： James J. Lin

IPC分类号： G01V1/26 ,  G01R1/38

CPC分类号： G01V1/26

摘要： A method for determining the effective or apparent firing time of a seismic source. The seismic detectors positioned at known distances from the source, but outside the non-linear acoustic region, are used to detect arrivals of energy from the source. The arrival times and known distances are used to determine effective source firing time which is in turn used to calibrate the source for actual seismic operations.

摘要翻译： 一种用于确定地震源的有效或明显的点火时间的方法。 位于距离源的已知距离但在非线性声学区域外的地震检测器用于检测来自源的能量的到达。 到达时间和已知距离用于确定有效的源射击时间，反过来又用于校准实际地震操作的源。

公开(公告)号：US4344032A

公开(公告)日：1982-08-10

申请号：US62901

申请日：1979-08-01

申请人： Jurgen Anlauf

发明人： Jurgen Anlauf

IPC分类号： B60T8/88 ,  G01P3/46 ,  G01P3/48 ,  G01R19/00 ,  G01R31/28 ,  G01R31/00 ,  G01R1/38

CPC分类号： B60T8/885 ,  G01P3/46 ,  G01P3/48 ,  G01R19/0038 ,  G01R31/2829 ,  B60T2270/406

摘要： A method and device for testing inductive pulse generators of the type used as wheel-rpm feedback transducers in anti-wheel-lock action in automotive braking systems. Within a portion of the range of frequencies at which such inductive pulse generator produces output voltage pulses, the amplitude and frequency of such pulses vary approximately in proportion to each other. In accordance with the present invention, a quality characterization signal is derived which varies similarly to the ratio of pulse amplitude and pulse frequency. Thus, within such frequency range, or equivalently within the corresponding range of wheel rotation speed in the context specified above, the value of the quality characterization signal will be independent of the frequency or wheel rpm at which the test happens to be performed.

摘要翻译： 一种用于在汽车制动系统中用于防轮锁动作用的车轮转速反馈换能器的感应式脉冲发生器的测试方法和装置。 在这种感应脉冲发生器产生输出电压脉冲的频率范围的一部分内，这种脉冲的幅度和频率彼此成比例地变化。 根据本发明，导出与脉冲幅度和脉冲频率的比率类似地改变的质量表征信号。 因此，在这样的频率范围内，或等效地在上述规定的上下文中的车轮旋转速度的相应范围内，质量特征信号的值将与执行测试的频率或车轮转速无关。

公开(公告)号：US4246534A

公开(公告)日：1981-01-20

申请号：US938570

申请日：1978-08-31

申请人： John H. Jacobi ,  Lawrence E. Larsen

发明人： John H. Jacobi ,  Lawrence E. Larsen

IPC分类号： G01R27/06 ,  G01R27/26 ,  G01R35/00 ,  G01R1/38

CPC分类号： G01R27/2635 ,  G01R27/06 ,  G01R35/005

摘要： A rapid and accurate method for calibrating an instrument for measuring the reflection coefficient and complex permittivity of unknown dielectric materials in a lumped capacitance method for an automatic network analyzer is described. The method includes the discovery that the capacitance of the instrument filled with air can be calculated by measuring only the reflection coefficients of the instrument filled with air and filled with a standard liquid of known permittivity, without the necessity of calculating the capacitance value from the dimensions of the instrument. The complex permittivity of the unknown can then be calculated by measuring the reflection coefficient of the instrument filled with the unknown dielectric. Complex permittivity measurements are useful in, for example, evaluating the time course of dielectric dispersions in biological samples.

摘要翻译： 描述了用于校准用于自动网络分析仪的集总电容方法中用于测量未知介电材料的反射系数和复介电常数的仪器的快速和精确的方法。 该方法包括发现，充满空气的仪器的电容可以通过仅测量填充有空气并充满已知介电常数的标准液体的仪器的反射系数来计算，而不需要从尺寸计算电容值 的仪器。 然后可以通过测量填充有未知电介质的仪器的反射系数来计算未知的复介电常数。 复介电常数测量可用于例如评估生物样品中电介质分散体的时间过程。

公开(公告)号：US3995214A

公开(公告)日：1976-11-30

申请号：US616781

申请日：1975-09-25

申请人： Norman J. Dionne

发明人： Norman J. Dionne

IPC分类号： G01R5/16 ,  G01R1/38

CPC分类号： G01R5/16

摘要： A magnetic metering system comprising a transversely magnetized cylinder carrying a radially extending pointer and mounted for axial rotation between a diametrically disposed pair of biasing magnets and a diametrically disposed pair of solenoid coils, and rotation compensating means disposed between the biasing magnets and the solenoid coils for providing the cylinder and pointer with an angular movement proportional to changes in a current flowing through the solenoid coils.

摘要翻译： 一种磁性计量系统，包括承载径向延伸的指示器的横向磁化的圆柱体，并安装成用于在径向设置的一对偏置磁体和径向设置的一对螺线管线圈之间进行轴向旋转;以及旋转补偿装置，设置在偏置磁体和螺线管线圈之间， 为气缸和指针提供与流过电磁线圈的电流变化成比例的角运动。

公开(公告)号：US3796952A

公开(公告)日：1974-03-12

申请号：US3796952D

申请日：1972-04-24

申请人： WANDEL & GOLTERMANN

发明人： BAYER H

IPC分类号： G01R19/00 ,  H04B3/48 ,  G01R1/02 ,  G01R1/38

CPC分类号： G01R19/0007 ,  H04B3/48

摘要： An incoming signal voltage of frequency fe, whose amplitude is to be measured, is additively heterodyned in a first mixer with a locally generated variable test frequency ft to provide a first beat frequency fi1 fe + ft clearing a first filter with a pass band including that beat frequency. In a second mixer, preceding a second filter with a narrow pass band centered on a second beat frequency fi2, the first beat frequency fi1 is subtractively heterodyned with a locally generated ancillary frequency fc of magnitude fi1 - fi2 to provide the frequency fi2 which passes the second filter and reaches an amplitude indicator through an adjustable amplifier or attenuator. In a calibrating position, a fixed reference frequency fo fi2 from a local oscillator is substituted for the input frequency fe whereas the test frequency ft is replaced by the ancillary frequency fc in the first mixer.

公开(公告)号：US3711774A

公开(公告)日：1973-01-16

申请号：US3711774D

申请日：1971-03-01

申请人： PERKIN ELMER CORP

发明人： BOHLER W

IPC分类号： G01R27/28 ,  G01R15/08 ,  G01R1/38

CPC分类号： G01R27/28

摘要： Apparatus for causing unknown electrical signals to be measurable directly on a desired ''''scale'''' performs the functions of: determining the ''''scaling'''' gain factor to make a (known) standard electrical signal equal a (manually set) particular voltage level; storing this gain factor; subsequently regenerating the stored gain factor; and applying this regenerated gain factor to an unknown electrical signal. The disclosed embodiment determines the desired gain factor by integrating the standard signal until it equals the manually set voltage level, stores this integration time factor by a second integrator integrating the same standard input signal for the same time and preserving the integrated output value at the end of this timing, regenerates this integration time by the second integrator integrating again the same input until it reaches the value of the previously preserved output, and causes the first integrator to integrate the unknown signal during this same regenerated integration time (as determined by the second integrator).

摘要翻译： 用于使未知电信号能够以期望的“规模”直接测量的装置执行以下功能：确定“缩放”增益因子以使（已知）标准电信号等于（手动设置）特定电压电平; 存储该增益因子; 随后再生存储的增益因子; 并将该再生增益因子应用于未知的电信号。 所公开的实施例通过对标准信号进行积分来确定期望的增益因子，直到其等于手动设置的电压电平，通过集成相同标准输入信号的第二积分器将该积分时间因子存储在同一时间并保持结束时的积分输出值 在该定时的情况下，第二积分器再次将相同的输入再次积分，直到其达到先前保存的输出的值，并且使得第一积分器在该相同的再生积分时间（由第二个 积分器）。

公开(公告)号：US3464012A

公开(公告)日：1969-08-26

申请号：US3464012D

申请日：1967-02-17

申请人： WEBB JAMES E ,  NASA

发明人： MCCORMICK CHARLES T JR ,  DOUGHTY ROBERT A ,  CAMP ERNEST L

IPC分类号： G01R15/09 ,  G01R1/38 ,  G01R15/08

CPC分类号： G01R15/09

公开(公告)号：US09733275B2

公开(公告)日：2017-08-15

申请号：US14808148

申请日：2015-07-24

申请人： ANALOG DEVICES, INC.

发明人： Shrenik Deliwala ,  Steven J. Decker ,  Gregory T. Koker ,  Dan M. Weinberg

IPC分类号： G01R1/38 ,  G01R15/09 ,  G01J1/44 ,  G01R19/25 ,  A61B5/024 ,  G01R15/08

CPC分类号： G01R15/09 ,  A61B5/02427 ,  G01J1/44 ,  G01J2001/446 ,  G01R15/08 ,  G01R19/25

摘要： A current detection module capable of differentiating and quantifying contribution to a current signal generated by a sensor in response to stimulation by a certain target source from contributions from sources other than the target source (ambient sources) is disclosed. As long as the contribution from the target source comprises a pulsed signal, the module may synchronize itself to the pulse(s) so that there is a predetermined phase relationship between the pulse(s) and functions carried out by various stages of the module. The module may be re-used to also detect and quantify contributions from ambient sources by presenting these contributions to the module as pulses that trigger synchronization of the module. To that end, a detection system disclosed herein is based on the use of such current detection module and allows mode switching where, depending on the selected mode of operation, the module is configured to perform different measurements.

公开(公告)号：US08829921B2

公开(公告)日：2014-09-09

申请号：US13221921

申请日：2011-08-31

申请人： Jun Zhang ,  Jun-Wei Zhang ,  Tsung-Jen Chuang ,  Shih-Fang Wong

发明人： Jun Zhang ,  Jun-Wei Zhang ,  Tsung-Jen Chuang ,  Shih-Fang Wong

IPC分类号： G01R27/02 ,  G01R31/02 ,  G01R1/38

CPC分类号： G01R31/42 ,  G01R19/1659

摘要： An AC voltage detection circuit includes a conversion module, a comparison module, and a prompt module. The conversion module connects to an AC power source and converts the AC voltage provided by the AC power source to an AC current, and then converts the AC current to a direct current (DC) voltage reflecting the AC voltage. The comparison module is connected to the conversion module, and compares the DC voltage with a first predetermined voltage and a second lesser predetermined voltage, and produces a control signal when the DC voltage is greater than the first predetermined voltage or less than the second predetermined voltage. The prompt module produces a prompt signal when receiving the control signal.

摘要翻译： AC电压检测电路包括转换模块，比较模块和提示模块。 转换模块连接到AC电源，并将交流电源提供的交流电压转换为交流电流，然后将交流电流转换为反映交流电压的直流（DC）电压。 比较模块连接到转换模块，并将直流电压与第一预定电压和第二较小预定电压进行比较，并且当直流电压大于第一预定电压或小于第二预定电压时产生控制信号 。 当接收到控制信号时，提示模块产生提示信号。

公开(公告)号：US08330449B2

公开(公告)日：2012-12-11

申请号：US12506118

申请日：2009-07-20

申请人： Robert M. Greenberg

发明人： Robert M. Greenberg

IPC分类号： G01R15/18 ,  G01R1/38

CPC分类号： G01R15/181 ,  G01R15/12 ,  G01R15/186

摘要： A clamp-on multimeter measures alternating current flow in an electrical conductor. The multimeter includes a display, a housing including the display, a first sensor, a second sensor, a processor and an integrator. The first sensor has a magnetizable material core and inductively senses the alternating current. The first sensor includes a first clamp portion fixed to the housing and a second clamp portion pivotally coupled to the first clamp portion. The second sensor includes a Rogowski coil that has a non-magnetic core and inductively senses the alternating current. The processor receives an input signal in a first voltage range and sends an output signal to the digital display. The integrator scales a signal from the second sensor in a second voltage range to the first voltage range. The housing includes the processor, the integrator, and a selector configured to select the input signal to the processor from one of the first sensor and the integrator.

摘要翻译： 钳位万用表测量电导体中的交流电流。 万用表包括显示器，包括显示器的壳体，第一传感器，第二传感器，处理器和积分器。 第一个传感器具有可磁化材料芯，并感应地感测交流电流。 第一传感器包括固定到壳体的第一夹紧部分和枢转地联接到第一夹持部分的第二夹紧部分。 第二传感器包括具有非磁芯并且感应地感测交流电的罗氏线圈。 处理器在第一电压范围内接收输入信号并向数字显示器发送输出信号。 积分器将来自第二传感器的信号在第二电压范围缩放到第一电压范围。 壳体包括处理器，积分器和配置成从第一传感器和积分器中的一个选择到处理器的输入信号的选择器。