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Low-frequency pulsed magnetic field sensor sensitivity coefficient calibration method and system

A technology of magnetic field sensors and sensitivity coefficients, applied in instruments, measuring devices, measuring electrical variables, etc., can solve problems such as measurement standards have not been established, and achieve the effect of solving traceability problems and accurate and reliable values

Pending Publication Date: 2021-06-29
METROLOGY & MEASUREMENT CENT OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no documented calibration method and standard for the sensitivity coefficient of the pulsed magnetic field sensor, and the corresponding measurement standard has not yet been established.

Method used

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  • Low-frequency pulsed magnetic field sensor sensitivity coefficient calibration method and system
  • Low-frequency pulsed magnetic field sensor sensitivity coefficient calibration method and system
  • Low-frequency pulsed magnetic field sensor sensitivity coefficient calibration method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Embodiment 1: A method for calibrating the sensitivity coefficient of a low-frequency pulsed magnetic field sensor, such as figure 1 shown, including the following steps:

[0051]S101: synchronously place the pulsed magnetic field sensor to be calibrated and the Hall effect magnetic field sensor in the pulsed magnetic field excited by the pulsed magnetic field generator for signal acquisition;

[0052] S102: Read the voltage amplitude of the first signal collected by the Hall effect magnetic field sensor through the acquisition device to obtain the standard pulse magnetic field amplitude;

[0053] S103: Integrate the second signal collected by the pulsed magnetic field sensor to be calibrated by an integrator to obtain a pulsed electrical signal, and the integrator matches the frequency of the pulsed magnetic field;

[0054] S104: The acquisition device performs calibration calculation on the sensitivity coefficient of the pulsed magnetic field sensor to be calibrated ...

Embodiment 2

[0073] Embodiment 2: A kind of low-frequency pulsed magnetic field sensor sensitivity coefficient calibration system, such as figure 1 As shown, it includes a pulsed magnetic field generator, a pulsed magnetic field sensor to be calibrated, a Hall effect magnetic field sensor, an integrator, and an acquisition device. The pulsed magnetic field sensor to be calibrated and the Hall effect magnetic field sensor are placed in the pulsed magnetic field excited by the pulsed magnetic field generator. The signal output end of the pulse magnetic field sensor to be calibrated is connected to the signal input end of the integrator through the first coaxial line, and the signal output end of the integrator is connected to the second channel port of the acquisition device. The signal output end of the Hall effect magnetic field sensor is connected to the second channel port of the acquisition device through the second coaxial line. The signal transmission frequencies of the first coaxial...

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Abstract

The invention discloses a low-frequency pulsed magnetic field sensor sensitivity coefficient calibration method and system and relates to the technical field of magnetic field sensor calibration. The method is characterized in that a pulsed magnetic field sensor to be calibrated and a Hall effect magnetic field sensor are synchronously placed in a pulsed magnetic field excited by a pulsed magnetic field generator for signal collection; the voltage amplitude of the first signal acquired by the Hall effect magnetic field sensor is read through acquisition equipment to obtain a standard pulse magnetic field amplitude; integration processing is conducted on a second signal acquired by the to-be-calibrated pulsed magnetic field sensor through an integrator to obtain a pulse electric signal; and the acquisition device performs calibration calculation on a sensitivity coefficient of the to-be-calibrated pulsed magnetic field sensor according to the pulse electric signal and the standard pulsed magnetic field amplitude to obtain a sensitivity coefficient calibration result. According to the method, a traceability problem of the pulsed magnetic field sensor can be solved within a certain frequency range, so the measured value is accurate and reliable, and a basis is provided for value traceability and accuracy evaluation of a pulsed magnetic field measurement system.

Description

technical field [0001] The present invention relates to the technical field of magnetic field sensor calibration, more specifically, it relates to a low-frequency pulse magnetic field sensor sensitivity coefficient calibration method and system. Background technique [0002] At present, pulsed magnetic field sensors based on Faraday's law of electromagnetic induction have been widely used in various application scenarios such as accelerator-guided magnetic field measurement, high-power laser device for inertial confinement fusion field effect measurement, and pulsed magnetic field measurement in high-voltage substations. Due to the conditions of the pulsed magnetic field and the sensitivity coefficient of the sensor are easily changed due to the interference of environmental factors, it is difficult to guarantee the accuracy of the measurement results. Therefore, it is necessary to use measurement methods to calibrate the sensitivity coefficient of the pulsed magnetic field s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 朱宇洁郭晓东宋佳玲袁汉何鹏林荔丽王月胜邓国荣
Owner METROLOGY & MEASUREMENT CENT OF CHINA ACADEMY OF ENG PHYSICS
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