公开(公告)号：US11662368B2

公开(公告)日：2023-05-30

申请号：US17169123

申请日：2021-02-05

Applicant: Fluke Corporation

Inventor： Ginger M. Woo ,  Gloria M. Chun ,  Ricardo Rodriguez ,  Ronald Steuer

IPC: G01R15/18 ,  H04Q9/00

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.

公开(公告)号：US20210239740A1

公开(公告)日：2021-08-05

申请号：US17169123

申请日：2021-02-05

Applicant: Fluke Corporation

Inventor： Ginger M. Woo ,  Gloria M. Chun ,  Ricardo Rodriguez ,  Ronald Steuer

IPC: G01R15/18 ,  H04Q9/00

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.

公开(公告)号：US10802072B2

公开(公告)日：2020-10-13

申请号：US15977662

申请日：2018-05-11

Applicant: Fluke Corporation

Inventor： Ronald Steuer ,  Ricardo Rodriguez

IPC: G01R31/302 ,  G01R31/28

Abstract: Systems and methods for measuring direct current (DC) voltage of an insulated conductor (e.g., insulated wire) are provided, without requiring a galvanic connection between the conductor and a test electrode or probe. A non-contact DC voltage measurement device may include a conductive sensor that is mechanically oscillated. The insulated conductor under test serves as a first conductive element or electrode of a coupling capacitor, and the vibrating conductive sensor serves as a second conductive element or electrode of the coupling capacitor. The oscillation of the conductive sensor provides the coupling capacitor with a time-varying capacitance value. The measurement device detects current flowing through the coupling capacitor, and determines the DC voltage in the insulated conductor using the detected current and the time-varying capacitance. The determined DC voltage may be output to a display or transmitted to an external system via a wired or wireless connection.

公开(公告)号：US10591515B2

公开(公告)日：2020-03-17

申请号：US15604320

申请日：2017-05-24

Applicant: Fluke Corporation

Inventor： Ricardo Rodriguez ,  David L. Epperson ,  Ronald Steuer ,  Jeffrey Worones

IPC: G01R19/00 ,  G01R33/00 ,  G01R15/20 ,  G01R15/14 ,  G01R1/22

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.

公开(公告)号：US10557875B2

公开(公告)日：2020-02-11

申请号：US15974994

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. A non-galvanic 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 a plurality of sensors that are polled to compensate for conductor position while allowing for measurement of physical characteristics of the conductor.

公开(公告)号：US20180136260A1

公开(公告)日：2018-05-17

申请号：US15604320

申请日：2017-05-24

Applicant: Fluke Corporation

Inventor： Ricardo Rodriguez ,  David L. Epperson ,  Ronald Steuer ,  Jeffrey Worones

IPC: G01R15/20 ,  G01R19/00

CPC classification number: G01R15/207 ,  G01R1/22 ,  G01R15/146 ,  G01R15/148 ,  G01R19/00 ,  G01R19/0092

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.