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公开(公告)号：US10359494B2
公开(公告)日：2019-07-23
申请号：US15439473
申请日：2017-02-22
Applicant: Fluke Corporation
Inventor： David L. Epperson , Ricardo Rodriguez
Abstract: Systems and methods provide a portable, verified voltage source that allows safe testing of separate non-contact voltage measurement systems. A proving unit of the present disclosure provides a known or specified alternating current (AC) voltage output across an insulated wire, which AC voltage may be fixed or may be user-selectable through a suitable user interface. The proving unit may include a visual indicator and/or an audible indicator that provides the user with an indication confirming that the proving unit is supplying an output voltage with the specifications of the proving unit, so the user will know that the proving unit is operating normally and is ready for testing a non-contact voltage measurement system. If the proving unit cannot provide the specified voltage output, the indicator(s) provides a signal to the user that the proving unit is currently non-functional.
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公开(公告)号：US10254375B2
公开(公告)日：2019-04-09
申请号：US15490550
申请日：2017-04-18
Applicant: Fluke Corporation
Inventor： David L. Epperson , Ricardo Rodriguez
Abstract: Systems and methods provide a portable, verified voltage source that allows safe testing of separate non-contact voltage measurement systems. A proving unit of the present disclosure provides a known or specified alternating current (AC) voltage output across an insulated wire, which AC voltage may be fixed or may be user-selectable through a suitable user interface. The proving unit may include a visual indicator and/or an audible indicator that provides the user with an indication confirming that the proving unit is supplying an output voltage with the specifications of the proving unit, so the user will know that the proving unit is operating normally and is ready for testing a non-contact voltage measurement system. If the proving unit cannot provide the specified voltage output, the indicator(s) provides a signal to the user that the proving unit is currently non-functional. The proving unit may additionally verify contact voltage measurement systems (e.g., DMMs).
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公开(公告)号：US20180136257A1
公开(公告)日：2018-05-17
申请号：US15625745
申请日：2017-06-16
Applicant: Fluke Corporation
Inventor： Ronald Steuer , Peter Radda , Ricardo Rodriguez , David L. Epperson , Patrick Scott Hunter , Paul Andrew Ringsrud , Clark N. Huber , Christian Karl Schmitzer , Jeffrey Worones , Michael F. Gallavan
CPC classification number: G01R15/125 , G01R1/22 , G01R15/14 , G01R15/16 , G01R15/207 , G01R19/00 , G01R19/25
Abstract: Systems and methods provide measurement of alternating current (AC) electrical parameters in an insulated wire without requiring a galvanic connection between the insulated wire and a test probe. Measurement systems or instruments may include a housing that includes both a non-contact voltage sensor and a non-contact current sensor. The measurement system obtains measurements from the voltage sensor and the current sensor during a measurement time interval and processes the measurements to determine AC electrical parameters of the insulated wire. The AC electrical parameters may be presented to an operator via a visual indicator device (e.g., display, lights). The AC electrical parameters may additionally or alternatively be communicated to an external device via a wired and/or wireless communications interface. The measurement system may include an alignment feedback sensor that provides feedback to a user regarding the mechanical alignment of the insulated wire relative to the voltage sensor and the current sensor.
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公开(公告)号：US11237192B2
公开(公告)日：2022-02-01
申请号：US16799686
申请日：2020-02-24
Applicant: Fluke Corporation
Inventor： Ricardo Rodriguez , David L. Epperson , Ronald Steuer , Jeffrey Worones
Abstract: 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：US10677876B2
公开(公告)日：2020-06-09
申请号：US15974981
申请日：2018-05-09
Applicant: Fluke Corporation
Inventor： Christian Karl Schmitzer , Ronald Steuer , Ricardo Rodriguez
IPC: G01R35/00
Abstract: Systems and methods for operating and calibrating measurement devices are provided herein. The measurement devices generate reference current signals and sense the reference current signals in a conductor under test, which sensed signals are used to determine a calibration factor or a position of the conductor under test. A calibration system may control a calibration voltage source to selectively output calibration voltages in a calibration conductor. The calibration system may obtain data from the electrical parameter measurement device captured by the electrical parameter measurement device when measuring the calibration conductor. Such data may include one or more reference current measurements, one or more voltage measurements, etc. The calibration system utilizes the obtained measurements to generate calibration data which may be stored on the voltage measurement device for use thereby during subsequent operation. The calibration data may include one or more lookup tables, coefficients for one or more mathematical formulas, etc.
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Patent Agency Ranking
公开(公告)号：US10551416B2
公开(公告)日：2020-02-04
申请号：US15974990
申请日：2018-05-09
Applicant: Fluke Corporation
Inventor： Ronald Steuer , Ricardo Rodriguez
IPC: G01R19/25 , G01R19/155
Abstract: Systems and methods for measuring AC voltage of an insulated conductor are provided, without requiring a galvanic connection between the conductor and a test electrode or probe. A non-galvanic contact (or “non-contact”) voltage measurement system includes a sensor subsystem, an internal ground guard and a reference shield. A common mode reference voltage source is electrically coupled between the internal ground guard and the reference shield to generate an AC reference voltage which causes a reference current to pass through the conductive sensor. Control circuitry receives a signal indicative of current flowing through the sensor subsystem due to the AC reference voltage and the AC voltage in the insulated conductor, and determines the AC voltage in the insulated conductor based at least in part on the received signal. The sensor subsystem includes at least two independent sensors that are used to compensate for conductor position while improving accuracy and dynamic range.
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公开(公告)号：US20180136303A1
公开(公告)日：2018-05-17
申请号：US15490550
申请日：2017-04-18
Applicant: Fluke Corporation
Inventor： David L. Epperson , Ricardo Rodriguez
IPC: G01R35/00
CPC classification number: G01R35/00 , G01R1/22 , G01R15/144 , G01R19/00 , G01R19/0084 , G01R19/18 , G01R27/08 , G01R31/08
Abstract: Systems and methods provide a portable, verified voltage source that allows safe testing of separate non-contact voltage measurement systems. A proving unit of the present disclosure provides a known or specified alternating current (AC) voltage output across an insulated wire, which AC voltage may be fixed or may be user-selectable through a suitable user interface. The proving unit may include a visual indicator and/or an audible indicator that provides the user with an indication confirming that the proving unit is supplying an output voltage with the specifications of the proving unit, so the user will know that the proving unit is operating normally and is ready for testing a non-contact voltage measurement system. If the proving unit cannot provide the specified voltage output, the indicator(s) provides a signal to the user that the proving unit is currently non-functional. The proving unit may additionally verify contact voltage measurement systems (e.g., DMMs).
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公开(公告)号：US20180136302A1
公开(公告)日：2018-05-17
申请号：US15439473
申请日：2017-02-22
Applicant: Fluke Corporation
Inventor： David L. Epperson , Ricardo Rodriguez
Abstract: Systems and methods provide a portable, verified voltage source that allows safe testing of separate non-contact voltage measurement systems. A proving unit of the present disclosure provides a known or specified alternating current (AC) voltage output across an insulated wire, which AC voltage may be fixed or may be user-selectable through a suitable user interface. The proving unit may include a visual indicator and/or an audible indicator that provides the user with an indication confirming that the proving unit is supplying an output voltage with the specifications of the proving unit, so the user will know that the proving unit is operating normally and is ready for testing a non-contact voltage measurement system. If the proving unit cannot provide the specified voltage output, the indicator(s) provides a signal to the user that the proving unit is currently non-functional.
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公开(公告)号：US20150362545A1
公开(公告)日：2015-12-17
申请号：US14306094
申请日：2014-06-16
Applicant: Fluke Corporation
Inventor： Matthew B. Marzynski , Ricardo Rodriguez
IPC: G01R31/24
CPC classification number: G01R31/245 , G01R31/44
Abstract: A fluorescent lamp testing device 10 has a microcontroller 100 that controls tests for ballast discrimination as well as gas integrity, ballast operation, filament continuity and line voltage. The ballast discrimination test is performed by the microcontroller 100 in combination with a photodiode 30 and high/low pass filter 32. Gas integrity is tested with pulse width modulation and a high-voltage, step-up transformer (PWM/T) circuit 42 and an antenna 40. A built in continuity tester has input pins 52, 54 to test the continuity of the filaments in the fluorescent lamp 12. The antenna 40 and a voltage-divider/voltage-sensor connected to the secondary coil in the transformer test for ballast operation. A PCB conductive loop 18, rectifier 20 and op amp 22 test for line voltage.
Abstract translation: 荧光灯测试装置10具有微控制器100，其控制镇流器鉴别以及气体完整性，镇流器操作，灯丝连续性和线路电压的测试。 镇流器鉴别测试由微控制器100与光电二极管30和高/低通滤波器32组合执行。气体完整性通过脉宽调制和高压升压变压器（PWM / T）电路42和 天线40.内置的连续性测试仪具有输入引脚52,54以测试荧光灯12中灯丝的连续性。天线40和连接到变压器中的次级线圈的分压器/电压传感器测试用于 镇流器操作。 PCB导电回路18，整流器20和运算放大器22测试线路电压。
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公开(公告)号：US12061213B2
公开(公告)日：2024-08-13
申请号：US18303397
申请日：2023-04-19
Applicant: Fluke Corporation
Inventor： Ginger M. Woo , Gloria M. Chun , Ricardo Rodriguez , Ronald Steuer
CPC classification number: G01R15/181 , H04Q9/00 , H04Q2209/40
Abstract: A sensor probe includes a body having first and second channels that are spaced apart and extend through the body approximately parallel to each other. A first end of a Rogowski coil is fixed within the first channel. The Rogowski coil passes through the second channel and loops back to the first channel where a second end of the Rogowski coil is selectively insertable into the first channel opposite the first end of the Rogowski coil. A non-contact sensor coupled to the body is positioned between the first and second channels to measure a parameter of an insulated conductor situated within the loop formed by the Rogowski coil. The size of an interior region within the loop is selectively adjustable by sliding movement of the Rogowski coil within the second channel.
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