Non-surrounding current measurement method based on magnetic sensor array
A sensor array and current measurement technology, which is applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve the problems of the influence of the current to be measured, lack of safety and convenience, and lack of convenience, so as to achieve a small calculation burden , the effect of easy installation
Active Publication Date: 2021-06-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0002] Current is an important parameter in the power system, and its accurate measurement is of great significance. The traditional contact current measurement method needs to connect the measuring device into the circuit in series, which lacks safety and convenience, and the measuring device itself will affect the current to be measured.
[0003] With the development of sensing technology, non-contact current measurement has been widely used. The current non-contact current measurement technology mainly uses the surrounding method to measure the magnetic field around the wire, and then calculate the wire current. This method has no effect on the current to be measured, and It is safer, but it still needs to disconnect the line for installation, which lacks convenience
[0004] Therefore, there is a need for a non-contact current measurement method without surrounding wires to solve the problem of ease of installation in the prior art
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[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.
[0017] An embodiment of the present invention provides a non-surround current measurement method based on a magnetic sensor array, such as figure 1 As shown, it mainly includes:
[0018] Step 1. Construct a sensor array for the wire to be measured, and construct a position equation of the sensor in combination with the spatial Cartesian coordinates formed by each sensor.
[0019] In the embodiment of the present invention, the sensor array is four...
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The invention discloses a non-surrounding current measurement method based on a magnetic sensor array. The method performs non-contact current measurement by constructing the sensor array, does not need to surround a wire, does not need to know the relative position of a sensor and a to-be-measured wire, and is convenient to install. When the time-varying current is measured, only the sampling points at the moment t = 0 need to be subjected to iterative calculation, the subsequent sampling points are directly solved through the proportionality coefficient, so the calculation burden is small; and the method has a position verification function, and when the positions of the sensor and the lead are detected to change, t is set to be equal to 0, iteration is performed again, so that the measurement result is not influenced by the position change.
Description
technical field [0001] The invention relates to the technical field of current measurement, in particular to a non-surround current measurement method based on a magnetic sensor array. Background technique [0002] Current is an important parameter in the power system, and its accurate measurement is of great significance. The traditional contact current measurement method needs to connect the measuring device into the circuit in series, which lacks safety and convenience, and the measuring device itself will affect the current to be measured. [0003] With the development of sensing technology, non-contact current measurement has been widely used. The current non-contact current measurement technology mainly uses the surrounding method to measure the magnetic field around the wire, and then calculate the wire current. This method has no effect on the current to be measured, and It is safer, but it still needs to disconnect the line for installation, which lacks convenience....
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Login to View More IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 毕天姝李嘉贤刘灏
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)