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公开(公告)号：US20180136260A1
公开(公告)日：2018-05-17
申请号：US15604320
申请日：2017-05-24
申请人： Fluke Corporation
CPC分类号： G01R15/207 , G01R1/22 , G01R15/146 , G01R15/148 , G01R19/00 , G01R19/0092
摘要： Systems and methods provide a non-contact current measurement system which operates to measure alternating current flowing through an insulated wire without requiring galvanic contact with the insulated wire. The measurement system may include a magnetic field sensor that is selectively positionable proximate an insulated wire under test. In operation the magnetic field sensor detects a magnetic field generated by the current flowing in the insulated wire. Using an adjustable clamp assembly, the measurement system provides control over the mechanical positioning of the insulated wire relative to the magnetic field sensor to ensure consistent measurements. The non-contact current measurement system may determine information relating to the physical dimensions (e.g., diameter) of the insulated wire. Using the detected magnetic field, the known mechanical positioning, and the determined information relating to the physical dimensions of the insulated wire, the measurement system accurately determines the magnitude of the current flowing through the insulated wire without galvanic contact.
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公开(公告)号：US20180113161A1
公开(公告)日：2018-04-26
申请号：US15298725
申请日：2016-10-20
IPC分类号： G01R29/08
CPC分类号： G01R15/144 , G01R15/148 , G01R29/0878
摘要： Improved devices, apparatuses, systems, and methods involving the use of field probes with voltage-controlled variable impedance elements and surface-launched acoustic wave devices, including surface acoustic wave (SAW) devices and SAW sensor-tag wireless interface devices to measure voltage and current in current carrying conductors (CCCs) via measurement of the electric fields and magnetic fields around said CCCs are disclosed. The devices, apparatuses, systems, and methods taught in the present invention include a remotely powered line-mounted measurement unit that requires no connection to electrical ground for operation, and that has no internal energy source, no energy harvesting or power conditioning circuitry, no discrete energy storage components, and no radio. The devices, apparatuses, systems, and methods taught in the present invention also provide for determining the phase (leading or lagging) of the current relative to the voltage in AC power systems, and also provide for measurement of temperature of the conductor.
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公开(公告)号：US20170343584A1
公开(公告)日：2017-11-30
申请号：US15674378
申请日：2017-08-10
发明人： Minoru ABE
IPC分类号： G01R15/14
CPC分类号： G01R15/148 , G01R15/205
摘要： Each of three magnetic sensors is positioned on a first virtual line that passes the centers of two magnetic shields in the width direction and is perpendicular to a virtual plane, so a value detected by the magnetic sensor is less likely to be influenced by an external magnetic field. The first virtual line and the center of a conductor intersecting the first virtual line are separated from each other by a certain distance. Therefore, even if a distance from the center of the conductor in the width direction to the magnetic sensor is short, it is possible to improve, on a high-frequency side, frequency characteristics in the detection sensitivity of the magnetic sensor for the frequency of the current under measurement.
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公开(公告)号：US09746497B2
公开(公告)日：2017-08-29
申请号：US13604022
申请日：2012-09-05
申请人： Masahiro Kawase
发明人： Masahiro Kawase
CPC分类号： G01R15/148 , G01R33/02
摘要： When a through hole is formed in a primary conductor, a measurement target current partially becomes a bypass current that flows around the through hole. Only a magnetic field component in the X-axis direction is generated from the current that flows through a portion without the influence of the through hole. However, the bypass current generates a magnetic field component in the Y-axis direction at the tilt portion. A magnetic detection element having a magnetic field detection sensitivity only in the Y-axis direction is installed near the through hole such that the magnetic field detection direction is set in the Y-axis direction, thereby detecting the magnetic field component and measuring the current amount without the influence of a neighboring current.
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公开(公告)号：US20150236493A1
公开(公告)日：2015-08-20
申请号：US14599851
申请日：2015-01-19
发明人： Andy Peczalski
CPC分类号： H02G5/02 , G01R1/02 , G01R15/148 , G01R15/18 , G01R15/207 , H02M7/003 , H02M2001/0009
摘要： A current bus that includes an opening that extends from one side of the current bus to an opposing side of the current bus. The opening changes in size as the opening extends from one side of the current bus to the opposing side of the current bus. The opening may include a first diameter and a second diameter that is different than the first diameter. The opening may include a first thickness at the first diameter of the opening which may be much smaller than a second thickness of the current bus. A high accuracy current measurement of the current bus may require that the magnetic field profile of the current bus within the opening be non-linear (e.g., 3rd order polynomial with the highest value of the 3rd degree coefficient).
摘要翻译： 一种当前总线，其包括从当前总线的一侧延伸到当前总线的相对侧的开口。 当开口从当前总线的一侧延伸到当前总线的相对侧时，开口的尺寸改变。 开口可以包括不同于第一直径的第一直径和第二直径。 开口可以包括在开口的第一直径处的第一厚度，其可以远小于当前总线的第二厚度。 当前总线的高精度电流测量可能要求开口内的当前总线的磁场分布是非线性的（例如，具有最高3度系数的三阶多项式）。
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公开(公告)号：US08604777B2
公开(公告)日：2013-12-10
申请号：US13181926
申请日：2011-07-13
申请人： Michael C. Doogue , Shaun D. Milano
发明人： Michael C. Doogue , Shaun D. Milano
IPC分类号： G01R35/00
CPC分类号： G01R15/148 , G01R15/207 , G01R35/005
摘要： An integrated circuit (IC) current sensor that self-calibrates to adjust its signal gain when employed in a current divider configuration is presented. The current sensor includes an integrated current conductor, a magnetic field transducer, a controllable gain stage and a calibration controller. The integrated current conductor is adapted to receive a portion of a calibration current. The calibration current corresponds to a full scale current. The magnetic field transducer, responsive to the calibration current portion, provides a magnetic field signal having a magnitude proportional to a magnetic field generated by the calibration current portion. The controllable gain stage is configured to amplify the magnetic field signal with an adjustable gain to provide an amplified magnetic field signal. The calibration controller is responsive to a calibration command signal to adjust the adjustable gain of the controllable gain stage to a calibrated gain in order to provide the amplified magnetic field signal at a predetermined voltage level that corresponds to a desired current sensor output signal voltage level if the full scale current were received by the integrated current conductor.
摘要翻译： 提出了一种集成电路（IC）电流传感器，当采用分流器配置时，可自行校准以调整其信号增益。 电流传感器包括集成电流导体，磁场换能器，可控增益级和校准控制器。 集成电流导体适于接收校准电流的一部分。 校准电流对应于满量程电流。 响应于校准电流部分的磁场传感器提供具有与由校准电流部分产生的磁场成比例的幅度的磁场信号。 可控增益级被配置为以可调增益放大磁场信号以提供放大的磁场信号。 校准控制器响应于校准命令信号以将可控增益级的可调增益调整到校准增益，以便将放大的磁场信号提供在与期望的电流传感器输出信号电压电平相对应的预定电压电平，如果 集成电流导体接收到满量程电流。
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7.发明申请公开(公告)号：US20130151187A1
公开(公告)日：2013-06-13
申请号：US13813142
申请日：2011-07-27
CPC分类号： G01R19/0092 , G01R15/148 , G01R27/2611 , G06F11/30
摘要： The present invention describes systems and methods for determining current flow through a current-carrying utility asset. An exemplary embodiment can include measuring a first magnetic induction value at a first location near a targeted current-carrying utility asset and a second magnetic induction value at a second location near the targeted asset where the first location is a known distance from the second location; determining a correlation between a spatial angle and an electrical phase angle between the targeted asset and a second asset where the second asset contributes a first and second error component to the first and second magnetic induction values respectively; estimating error values for the first and second error components using the correlation between the spatial angle and the electrical phase angle; and estimating a current flowing through the targeted asset using the first and second magnetic induction values, the known distance, and the error values.
摘要翻译： 本发明描述了用于确定通过载流效用资产的电流的系统和方法。 示例性实施例可以包括测量在目标载流效用资产附近的第一位置处的第一磁感应值和在目标资产附近的第二位置处的第二磁感应值，其中第一位置是距离第二位置的已知距离; 确定目标资产和第二资产之间的空间角度和电相角之间的相关性，其中第二资产分别对第一和第二磁感应值贡献第一和第二误差分量; 使用空间角和电相角之间的相关性来估计第一和第二误差分量的误差值; 以及使用第一和第二磁感应值，已知距离和误差值估计流过目标资产的电流。
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公开(公告)号：US08111059B1
公开(公告)日：2012-02-07
申请号：US12695197
申请日：2010-01-28
IPC分类号： G01R15/18
CPC分类号： G01R19/0092 , G01R15/148
摘要： The disclosure herein provides an apparatus for location of a quantity of current vectors in an electrical device, where the current vector has a known direction and a known relative magnitude to an input current supplied to the electrical device. Mathematical constants used in Biot-Savart superposition equations are determined for the electrical device, the orientation of the apparatus, and relative magnitude of the current vector and the input current, and the apparatus utilizes magnetic field sensors oriented to a sensing plane to provide current vector location based on the solution of the Biot-Savart superposition equations. Description of required orientations between the apparatus and the electrical device are disclosed and various methods of determining the mathematical constants are presented.
摘要翻译： 本文的公开内容提供了一种用于在电气设备中定位一定数量的电流矢量的装置，其中电流矢量具有与提供给电气设备的输入电流的已知方向和已知的相对幅度。 确定Biot-Savart叠加方程中使用的数学常数，用于电气装置，装置的方向以及电流矢量和输入电流的相对幅度，并且该装置利用定向到感测平面的磁场传感器来提供电流矢量 基于Biot-Savart叠加方程的解的位置。 公开了装置和电气装置之间的所需取向的描述，并给出了确定数学常数的各种方法。
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9.发明授权Micro-electromechanical system (MEMS) based current and magnetic field sensor having capacitive sense components 有权基于微机电系统（MEMS）的电流和磁场传感器具有电容感测元件公开(公告)号：US07901970B2
公开(公告)日：2011-03-08
申请号：US11939589
申请日：2007-11-14
申请人： Anis Zribi , Glenn Scott Claydon , Christopher James Kapusta , Laura Jean Meyer , Ertugal Berkcan , Wei-Cheng Tian
发明人： Anis Zribi , Glenn Scott Claydon , Christopher James Kapusta , Laura Jean Meyer , Ertugal Berkcan , Wei-Cheng Tian
IPC分类号： H01L21/00
CPC分类号： G01R33/0283 , G01R15/148 , G01R33/0286
摘要： A micro-electromechanical system (MEMS) based current & magnetic field sensor includes a MEMS-based magnetic field sensing component having a capacitive magneto-MEMS component, a compensator and an output component for sensing magnetic fields and for providing, in response thereto, an indication of the current present in a respective conductor to be measured. In one embodiment, first and second mechanical sense components are electrically conductive and operate to sense a change in a capacitance between the mechanical sense components in response to a mechanical indicator from a magnetic-to-mechanical converter.
摘要翻译： 基于微机电系统（MEMS）的电流和磁场传感器包括具有电容式磁MEMS组件的基于MEMS的磁场感测部件，补偿器和用于感测磁场的输出部件，并且响应于此而提供 当前存在于待测量的导体中的指示。 在一个实施例中，第一和第二机械感测部件是导电的并且用于响应于来自磁 - 机械转换器的机械指示器感测机械感测部件之间的电容的变化。
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10.发明授权公开(公告)号：US07772856B2
公开(公告)日：2010-08-10
申请号：US11502435
申请日：2006-08-11
申请人： Hiroki Funato , Takashi Suga
发明人： Hiroki Funato , Takashi Suga
IPC分类号： G01R27/08
CPC分类号： G01R29/085 , G01R15/148
摘要： A junction-current probe is provided which can measure a current flowing in a junction port adapted to connect a circuit board or an electronic apparatus to a chassis under the condition that the circuit board or electronic apparatus is packaged to the chassis. Structurally, the current probe has a circular or rectangular insulator having a hole in the center, a coiled conductor wire for converting linkage flux into voltage, an insulating member for preventing the insulator from making electrical contact with surroundings, an extraction lead for connecting opposite ends of the conductor wire to a cable and the cable for connection to a measurement unit. The current probe is reduced in thickness within in a range in which the condition of packaging to the chassis can remain unchanged.
摘要翻译： 提供了一种结流电流探针，其可以在将电路板或电子设备封装到底盘的条件下测量在适于将电路板或电子设备连接到机架的接合端口中流动的电流。 在结构上，电流探头具有在中心具有孔的圆形或矩形绝缘体，用于将链接磁通转换为电压的线圈导线，用于防止绝缘体与周围环境电接触的绝缘构件，用于连接相对端的引出线 的导线连接到电缆和用于连接到测量单元的电缆。 电流探头的厚度在包装到底盘的状态保持不变的范围内。
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