针对铁磁性材料应力检测问题, 分析了铁磁性材料矫顽力和材料所受应力的关系, 提出了通过检测铁磁性材料的矫顽力实现检测应力的方法。采用电磁检测原理测量铁磁性材料的矫顽力, 选取3个受到不同拉应力的铁磁性圆环, 在圆环对称位置分别缠绕激励线圈和检测线圈, 采用正弦交流信号作为激励, 测量圆环的磁滞回线, 计算3个圆环的矫顽力值。结果表明, 圆环受力后磁滞回线的形状发生改变, 矫顽力随着材料所受应力的增大而增大。

According to the issue of ferromagnetic material stress detecting, the relationship between the coercive force and the stress of ferromagnetic material is studied. The dctection of the stress by detecting the coercive force of ferromagnetic material is proposed. Using electromagnetic detection principle to measure the coercive force of ferromagnetic materials, three ferromagnetic rings suffered different sizes tensile stresses are selected by the experiment. On the symmetrical position of the ring around a detection coil and an excitation coil, by using sinusoidal AC signal as an excitation, the value of the coercive force of three rings is calculated by measuring the magnetic hysteresis loops of ferromagnetic ring. The results show that after the ferromagnetic material is stressed, the shape of the hysteresis loop will change.The value of the coercive force of the meterial will be increased as the stress increases. Therefore, the stress with which the material is subjected can be measured by the coercive force.