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Long and straight wire current measurement method and system

A technology of current measurement and straight wires, applied in the direction of measuring devices, only measuring current, measuring electrical variables, etc., can solve the problems of large measurement errors and installation errors, and achieve simple calculation methods, high measurement accuracy, and flexible installation methods Effect

Active Publication Date: 2021-06-18
JIAXING BROADSENS TECH LTD
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Problems solved by technology

[0004] To this end, the embodiment of the present invention provides a long straight wire current measurement method and system to solve the problem of large measurement errors caused by external magnetic field interference and installation errors in the existing wire current measurement method

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  • Long and straight wire current measurement method and system
  • Long and straight wire current measurement method and system
  • Long and straight wire current measurement method and system

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Embodiment Construction

[0040] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. 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.

[0041] Embodiment 1 of the present invention proposes a method for measuring the current of a long straight wire, specifically as figure 1 As shown, the method includes the following steps:

[0042] Step 110: Set at least four multi-axis magnetic field sensors within a preset distance range around the wire, the projection points of the multi-axis magnetic field sensors on the cross-sectional pla...

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Abstract

The embodiment of the invention discloses a long and straight wire current measurement method and system. The method comprises the steps: arranging at least four multi-axis magnetic field sensors in a preset distance range around a wire, calculating the magnetic induction intensity generated by an interference magnetic field according to the magnetic induction intensity measured by the multi-axis magnetic field sensors; and further calculating the magnetic induction intensity generated by the wire current and the distance between the wire and the multi-axis magnetic field sensors, and finally obtaining the current value of the wire. According to the method, the influence of the sensor installation mode on a measurement error is small, the positions of the multi-axis magnetic field sensors do not need to be limited on the same straight line as the projection points of the positions of the multi-axis magnetic field sensors on the cross section plane of the wire are not overlapped, the installation mode is flexible, and by calculating the magnetic induction intensity generated by the interference magnetic field, the influences generated by the interference magnetic field can be clearly removed, a calculation method is simple and convenient, and measurement accuracy is high.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of current measurement sensors, and in particular to a method and system for measuring the current of a long straight wire. Background technique [0002] In recent years, with the development of magnetic sensor technology, magnetic sensors such as Hall magnetic sensors, anisotropic magnetoresistance AMR, giant magnetoresistance GMR, and tunnel magnetoresistance TMR have been introduced into power systems for measuring current, making current measurement sensors smaller Smaller, lighter in weight, and easier to install and implement. Although the current generates a magnetic field and can be detected, there are many interferences in the detection of the magnetic field, such as the interference of the earth's magnetic field and the magnetic field interference generated by the operation of industrial equipment. It is also another major cause of detection errors. [0003] In the existing ...

Claims

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Application Information

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IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 刘双文刘磊
Owner JIAXING BROADSENS TECH LTD
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