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针对铁磁性材料由于应力集中导致的断裂等问题,分析了铁磁性材料在磁化过程中激励频率对巴克豪森信号的影响,分析了应力与巴克豪森信号的关系及特性。采用检测线圈与激励线圈共同缠绕于同一磁芯的方式来接收信号,并通过高通滤波电路得到巴克豪森信号。实验结果表明,激励频率在20Hz时,巴克豪森信号较强较稳定,并且随铁磁性材料中拉应力增大而增大。通过检测巴克豪森信号的大小实现铁磁性材料的应力检测,有效地预防因应力过大造成的工件损坏问题。
Aiming at the problems of ferromagnetic materials such as fracture caused by stress concentration, the influence of excitation frequency on the Barkhausen signal in ferromagnetic material during magnetization is analyzed. The relationship between stress and Barkhausen signal is analyzed. The detection coil and the excitation coil are co-wound on the same core to receive the signal, and the Barkhausen signal is obtained through the high-pass filter circuit. The experimental results show that the Barkhausen signal is strong and stable when the excitation frequency is 20Hz, and increases with the increase of tensile stress in ferromagnetic materials. By detecting the size of the Barkhausen signal to detect the stress of ferromagnetic materials, it can effectively prevent the workpiece from being damaged due to excessive stress.