一种硬磁材料的磁化状态检测系统及方法
By acquiring the magnetic flux density distribution map of hard magnetic materials and applying a local reverse magnetic field at physical feature points, the demagnetization region of hard magnetic materials can be identified and quantified. This solves the problem that traditional detection methods cannot accurately locate the demagnetization region, and achieves efficient and accurate demagnetization region determination and visual detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LULIANG UNIV
- Filing Date
- 2026-04-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to accurately pinpoint demagnetization regions when localized irreversible changes occur in the magnetic domain structure of hard magnetic materials. Traditional detection methods cannot distinguish whether the decrease in magnetic flux density is due to a decrease in the material's coercivity or demagnetization caused by its geometry.
By acquiring the magnetic flux density distribution map of the hard magnetic material surface, the target magnetic flux density area with a normal magnetic flux density value below the threshold is identified. A local excitation probe is used to apply a linearly increasing local reverse magnetic field at the physical feature point to monitor the change in magnetic flux density, extract the coercivity characteristic parameters, and compare them with the benchmark coercivity parameters to determine the demagnetized area.
It achieves precise positioning of demagnetization regions under local irreversible changes in the magnetic domain structure of hard magnetic materials, avoids interference from the global reverse magnetic field on the normal region of the material, provides a quantitative standard for determining demagnetization regions, and outputs a visualized magnetization state detection spectrum.
Smart Images
Figure CN122085192B_ABST