Material Aging Diagnosis System using Magnetic sensing and Simulation

强磁性材料的磁性对材料微观结构的变化和残余应力的变化极为敏感。在这项研究中，一个非破坏性评估系统的老化性能的铁磁材料的磁性测量的基础上开发。使用应力加载的碳钢样品试样来评估矫顽力和巴克豪森噪声（BHN）。然后由测量的磁性能导出特性曲线。在此基础上，根据材料时效工艺的决策规则，开发了一个与磁性能相关的模糊专家系统。实验结果表明了该系统的有效性和可行性

It is well known that the magnetism of strong magnetic materials is extremely sensitive with respect to the change of microstructure and to the residual-stress variation. In this study, a non-destructiveness evaluation system for aging properties was developed based on magnetic measurements of the ferromagnetic materials. The coercive force and Barkhausen noise(BHN) were evaluated using carbon steel sample specimens of stress loading. The characteristic curves were then derived by the measured magnetic properties. A fuzzy expert system related to magnetic properties was consequently developed with the decision rules of material aging process. The efficacy and validity of the proposed system were shown in the experimental works