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公开(公告)号：US12092662B2
公开(公告)日：2024-09-17
申请号：US17910362
申请日：2021-02-22
发明人： Masahiro Kawaguchi
CPC分类号： G01R15/16 , G01R1/04 , G01R1/06788 , G01R19/0084
摘要： A clamp-type AC voltage probe includes: a clamp portion that clamps a cable to be measured; an electrode disposed to be opposed to the cable clamped by the clamp portion; a parallel circuit in which a capacitor and a resistance are connected in parallel, and one end of which is connected to the electrode; a resistance one end of which is connected to the other end of the parallel circuit and the other end of which is connected to a circuit ground; a capacitor one end of which is connected to the other end of the parallel circuit and the other end of which is connected to the circuit ground; and an amplifier an input terminal of which is connected to the one end or the other end of the parallel circuit, and that amplifies and outputs a signal input into the input terminal.
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公开(公告)号：US12085591B2
公开(公告)日：2024-09-10
申请号：US18150032
申请日：2023-01-04
发明人： Vivek R. Dave , Felix Loske , Enger Knop , Lutz Tröger , Alan E. Casallas , Jeffrey H. Lang
IPC分类号： G01R15/16 , G01R15/14 , G01R15/20 , G01R21/08 , G01R21/133 , G01R33/00 , G01R33/02 , G01R33/06 , G01R35/00
CPC分类号： G01R15/16 , G01R15/142 , G01R15/207 , G01R21/08 , G01R21/1331 , G01R33/0029 , G01R33/0082 , G01R33/0094 , G01R33/02 , G01R33/06 , G01R35/005
摘要： A multi-sensor, real-time, in-process current and voltage estimation system is disclosed including sensors, affiliated hardware, and data processing algorithms that allow accurate estimation of currents and voltages from magnetic and electric field measurements, respectively. Aspects of the system may be embodied in a detector that is readily attachable to conductors of an energized system for contactless current and/or voltage sensing of the conductors without requiring the conductors to be disconnected from the energized system.
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公开(公告)号：US12019109B2
公开(公告)日：2024-06-25
申请号：US17721238
申请日：2022-04-14
发明人： Tatsumi Fujiyoshi
IPC分类号： G01R27/26 , G01R15/16 , G01R19/165 , G01R19/30 , G01R27/00 , G01V3/08 , G06F3/041 , G06F3/044 , H03K17/955
CPC分类号： G01R27/2605 , G06F3/044 , H03K17/955 , H03K2217/96071
摘要： A capacitance detection device detecting a capacitance between a detection electrode and a detection target close to the detection electrode has: a first voltage output circuit that outputs a first alternating current voltage to be supplied to a shield electrode placed close to the detection electrode; a second voltage output circuit that outputs a second alternating current voltage with substantially the same frequency as the first alternating current voltage; and an operational amplifier that amplifies the difference in voltage between an inverting input terminal connected to the detection electrode and a non-inverting input terminal to which the second alternating current voltage is applied, and outputs the amplified difference in voltage. With the detection target close to the detection electrode, the second voltage output circuit outputs the second alternating current voltage adjusted so that an output voltage from the operational amplifier has a smaller amplitude than the first alternating current voltage.
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公开(公告)号：US11994537B2
公开(公告)日：2024-05-28
申请号：US17743785
申请日：2022-05-13
发明人： Vratislav Michal
CPC分类号： G01R15/16 , G01R19/0084
摘要： In an embodiment, a circuit includes a first branch coupled between a first node and a second node, the first branch including a first ceramic capacitor, the first ceramic capacitor including terminals configured to receive a first voltage applied therebetween. The circuit further includes a second branch coupled between the first node and a third node, the second branch including a second ceramic capacitor that is substantially identical to the first ceramic capacitor, the second ceramic capacitor including terminals configured to receive a second voltage applied therebetween. The circuit further includes a control circuit configured to modify the second voltage until a first current passing through the second node is substantially equal to a second current passing through the third node.
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公开(公告)号：US11988703B2
公开(公告)日：2024-05-21
申请号：US17757428
申请日：2020-12-31
发明人： Douglas B. Gundel , Uri Bar-Ziv , Eyal Doron
CPC分类号： G01R31/1272 , G01R15/16 , G01R19/2513 , G01R31/081 , G01R31/085
摘要： In general, a monitoring system includes one or more nodes that are capacitively coupled to a cable of a multiphase electric power line. In some examples, a node includes a coupling layer disposed over a jacket layer of the cable and capacitively coupled to a shield layer of the cable. In some examples, a node may include a first coupling layer capacitively coupled to a first cable, and a second coupling layer capacitively coupled to a second cable, such that the node is differentially coupled to the cable pair to generate a differential data signal and to perform at least one of: sensing a native signal within the cable pair; injecting an intentional signal into the cable pair; receiving an intentional signal from within the cable pair; or providing a channel characterization.
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公开(公告)号：US20240077520A1
公开(公告)日：2024-03-07
申请号：US18506651
申请日：2023-11-10
发明人： Alberto Bauer
CPC分类号： G01R15/16 , G01R15/165 , G01R19/0084 , G01R15/142
摘要： A capacitive voltage sensor assembly includes a first electrode extending along a longitudinal axis, a tubular section surrounding a portion of the first electrode and positioned radially outward from the longitudinal axis and the first electrode, the tubular section including an insulating layer, an inner conductive layer, and an outer conductive layer, and a mass of dielectric insulating material at least partially enclosing the first electrode and the tubular section. The mass of dielectric insulating material fills through openings formed in the tubular section.
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公开(公告)号：US20240061024A1
公开(公告)日：2024-02-22
申请号：US17820121
申请日：2022-08-16
申请人： ChargePoint, Inc.
发明人： Ivan Baranov
CPC分类号： G01R19/0092 , G01R15/146 , G01R15/16 , G01R33/04
摘要： An open-loop fluxgate-type current sensor is described. The current sensor includes a single winding around a core that combines drive and sense that is used as both an excitation source and a feedback element to measure current through a primary winding. The current sensor further includes an H-bridge driver to impress voltage to the single winding to cause current to saturate the core, the volage being impressed with opposing polarities repeatedly causing the core to saturate at opposing polarities. The current sensor further includes an analog transconductance integrator that continuously integrates the current to infer magnetizing force being driven into the core at the opposing polarities. The current sensor further includes a microcontroller unit (MCU) that calculates residual current based on the inferred magnetizing force being driven into the core at the opposing polarities and cause remedial action to be taken when the calculated residual current exceeds a threshold.
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公开(公告)号：US20240053386A1
公开(公告)日：2024-02-15
申请号：US18362532
申请日：2023-07-31
申请人： Bar Ilan University
发明人： Joseph Shor , Amir Mizrahi , Gil Golan , Orel Dahaman , Omer Nechushtan
摘要： A method for measuring voltage droop and temperature in a circuit include using capacitive coupling to couple a bias voltage of a current controlled oscillator (CCO) to a noisy digital Vcc (VCCD) supply, so that a frequency of the CCO is independent of a DC Vcc level of the noisy VCCD supply and the CCO measures an AC voltage droop of the noisy VCCD supply and a temperature which is dependent upon the AC voltage droop.
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公开(公告)号：US20230375597A1
公开(公告)日：2023-11-23
申请号：US18346656
申请日：2023-07-03
发明人： Lorenzo Peretto , Alberto Bauer
IPC分类号： G01R15/16
CPC分类号： G01R15/165
摘要： A capacitive voltage sensor includes an electrode extending along a longitudinal axis, a tubular portion including a layer of electrically insulating material, a layer of electrically conductive material positioned radially inward of the layer of electrically insulating material in a direction toward the longitudinal axis, and an outer shield configured as a latticelike network and positioned radially outward of the layer of electrically insulating material in a direction away from the longitudinal axis. The layer of electrically conductive material, the layer of electrically insulating material, and the outer shield each surround and is spaced in a direction radially outward from the longitudinal axis and from a portion of the electrode. A mass of dielectric insulating material at least partially encapsulating the electrode and the tubular portion and fills through holes formed in the latticelike network of the outer shield.
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公开(公告)号：US11796583B2
公开(公告)日：2023-10-24
申请号：US17757868
申请日：2020-12-22
发明人： Lionel Cima
CPC分类号： G01R31/086 , G01R15/16 , G01R15/181 , G01R31/1272 , H02H1/0007 , H02H1/0015 , H02H7/20
摘要： A member for measuring a variable representative of a common mode voltage in an electrical network a device. The network or the device includes at least a first power conductor and a second power conductor. The measuring member has two capacitive elements which are intended to be arranged in a bridge between the two power conductors and have capacity values that are identical to each other. The two capacitive elements are connected at a midpoint. The measuring member also includes a two-terminal measurement circuit connected on the one hand to the midpoint and on the other hand to a connection terminal intended to be electrically connected to a common conductor provided in the electrical network or device.
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