A current measurement method and device based on a uniaxial magnetic sensor chip

A current measurement and magnetic sensing technology, which is applied in the direction of measuring devices, the size/direction of the magnetic field, and the measurement of magnetic variables, etc., can solve the problems of tediousness and limit the applicable scenarios of closed-loop measurement methods, and achieve the effect of reducing the tediousness
CN109521375BActive Publication Date: 2020-04-24ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Publication Date
2020-04-24

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Abstract

The invention discloses a current measurement method and device based on single-axis magnetic sensing chips. The method comprises the steps: receiving the magnetic field intensity, measured by each single-axis magnetic sensing chip, of a to-be-measured cable at the current position, wherein the single-axis magnetic sensing chips are located in the same plane or mutually parallel planes; obtainingthe relative position of each single-axis magnetic sensing chip; and calculating the current value of the to-be-measured cable according to the relative positions of the single-axis magnetic sensing chips and the magnetic field intensity measured by the single-axis magnetic sensing chips. According to the technical scheme disclosed by the invention, non-closed-loop measurement can be realized by utilizing the single-axis magnetic sensing chips, so that the cumbersome degree of current measurement can be reduced, and the current value of a to-be-measured cable in almost any scene can be measured, so that the current measurement is not limited by the installation scene of the to-be-measured cable.
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Description

technical field

[0001] The invention relates to the technical field of electric power measurement, and more specifically, to a current measurement method and device based on a single-axis magnetic sensor chip. Background technique

[0002] During the operation of the power system, in order to understand the operation of the power system in time, it is necessary to measure the current and other operating parameters of the power system.

[0003] At present, for the measurement of the cable current to be tested, it is often necessary to form a closed-loop form on the cable to be tested through a chip or a magnetic core to measure the magnetic field strength generated by the cable to be tested, and then calculate the current value of the cable to be tested, that is, to surround The cable to be tested forms a closed-loop structure to measure the cable to be tested. However, this closed-loop measurement method is cumbersome to implement, and this measurement method can only measu...

Claims

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