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Ferromagnetic material coercive force measuring method and device based on digital feedback

A ferromagnetic material and measurement method technology, applied in the direction of magnetic performance measurement, etc., can solve the problems of low stability and accuracy, slow measurement speed, etc., to avoid leakage, and the system runs stably and accurately.

Pending Publication Date: 2022-07-29
合肥迈尔睿测控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method and device for measuring the coercive force of ferromagnetic materials based on digital feedback, which solves the problems of slow measurement speed, low stability and low accuracy in the current coercive force measurement method

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  • Ferromagnetic material coercive force measuring method and device based on digital feedback
  • Ferromagnetic material coercive force measuring method and device based on digital feedback

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Embodiment 1

[0059] like figure 1 As shown, the present invention provides a method for measuring coercivity of ferromagnetic materials based on digital feedback, the method comprising:

[0060] Generate pulse excitation signal;

[0061] Applying a first magnetic field to the sample to be tested based on the pulse excitation signal to make it reach a magnetic saturation state;

[0062] Real-time acquisition of the magnetic flux density signal passing through the sample to be tested;

[0063] adjusting the feedback excitation signal based on the magnetic flux density signal;

[0064] Applying a second magnetic field opposite to the direction of the first magnetic field to the sample to be tested based on the feedback excitation signal;

[0065] When the magnetic flux density signal passing through the sample to be tested is 0, the coercive force is calculated based on the proportional coefficient and the feedback excitation signal at this time.

[0066] The beneficial effects of this embo...

Embodiment 2

[0094] The present invention also provides a digital feedback-based ferromagnetic material coercive force measurement device, comprising:

[0095] The pulse excitation signal generation module is used to generate the pulse excitation signal;

[0096] a magnetic field generating module for applying a first magnetic field to the sample to be tested based on the pulse excitation signal; the first magnetic field makes the sample to be tested reach a magnetic saturation state;

[0097] The magnetic flux density signal detection module is used to detect the magnetic flux density signal passing through the sample to be tested;

[0098] a feedback excitation signal adjustment module for adjusting the feedback excitation signal based on the magnetic flux density signal;

[0099] The magnetic field generating module is further configured to apply a second magnetic field opposite to the direction of the first magnetic field to the sample to be tested based on the feedback excitation sig...

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Abstract

The invention provides a ferromagnetic material coercive force measurement method and device based on digital feedback, and relates to the technical field of coercive force measurement. The pulse excitation signal is generated according to the to-be-tested sample, the first magnetic field applied to the to-be-tested sample is generated according to the pulse excitation signal, the to-be-tested sample rapidly reaches the magnetic saturation state, the magnetic flux density signal penetrating through the to-be-tested sample is obtained in real time, and the feedback excitation signal is adjusted according to the magnetic flux density signal. A second magnetic field opposite to the first magnetic field in direction is applied to the to-be-measured sample according to the first magnetic field, finally, a magnetic flux density signal penetrating through the to-be-measured sample is made to be 0, and at the moment, the coercive force can be calculated based on the proportionality coefficient and the feedback excitation signal at the moment. Therefore, the coercive force value can be obtained without measuring the whole hysteresis curve, the method can be applied to real-time on-line rapid measurement, meanwhile, due to the fact that the digital feedback mode is adopted, the influence of electric leakage of a traditional integrating circuit is avoided, and the whole system runs more stably and accurately.

Description

technical field [0001] The invention relates to the technical field of coercive force measurement, in particular to a method and device for coercive force measurement of ferromagnetic materials based on digital feedback. Background technique [0002] Coercivity is one of the important characteristics of magnetic materials, representing the ability of magnetic materials to resist demagnetization. Through the on-line measurement of coercive force of ferromagnetic materials, it can meet various application needs, including the distinction of magnetic materials, the aging degradation and working life evaluation of ferromagnetic materials, the quality evaluation of heat treatment, chemical heat treatment and mechanical heat treatment, and residual stress detection. and relative hardness testing, etc. Therefore, a fast and efficient coercivity test method is very important for such materials. [0003] At present, the measurement of coercive force is usually to measure the corres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12
CPCG01R33/12
Inventor 尹武良陈子其汪书培豪尔赫·里卡多·萨拉斯·阿维拉谢跃东
Owner 合肥迈尔睿测控技术有限公司
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