Current measurement method and device based on single-axis magnetic sensing chips
A current measurement device and current measurement technology, which are applied to the measurement device, the size/direction of the magnetic field, and the measurement of magnetic variables, etc., can solve the problems of cumbersome and limit the application scenarios of closed-loop measurement methods, and achieve the effect of reducing the degree of cumbersomeness.
Active Publication Date: 2019-03-26
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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However, this closed-loop measurement method is cumbersome to implement, and this measurement method can only measure completely independent cables to be tested, but cannot measure a part of non-independent tested cables that are in contact with other equipment or completely in a closed space. The cable is used for measurement, which limits the measurement application scenarios of the closed-loop measurement method
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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] See figure 1 , which shows a flow chart of a current measurement method based on a single-axis magnetic sensor chip provided by an embodiment of the present invention, which may include:
[0041] S11: Receive the magnetic field strength of the cable to be tested at the current position measured by the uniaxial magnetic sensor chips, wherein the uniaxial magnetic sensor chips are in the same plane or in planes parallel to each other.
[0042] It should ...
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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.
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...
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CPCG01R33/0283
Inventor 李鹏王志明许爱东李立浧吴质冰明哲
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD