磁巴克豪森噪声表征铁磁性材料应力的最优特征值研究  

Study on the Optimal Feature of Magnetic Barkhausen Noise to Characterize Stress in Ferromagnetic Materials

作　　者：张鑫 谭继东[2] 朱雨虹[2] 周进节[1] 郑阳[2] ZHANG Xin;TAN Jidong;ZHU Yuhong;ZHOU Jinjie;ZHENG Yang(School of Mechanical Engineering,North University of China,Taiyuan Shanxi 030051,China;Key Laboratory of Nondestructive Testing and Evaluation for State Market Regulation,China Special Equipment Inspection and Research Institute,Beijing 100029,China)

机构地区：[1]中北大学机械工程学院,山西太原030051 [2]中国特种设备检测研究院,国家市场监管总局无损检测与评价重点实验室,北京100029

出　　处：《传感技术学报》2020年第9期1240-1245,共6页Chinese Journal of Sensors and Actuators

基　　金：国家重点研发计划“国家质量基础的共性技术研究与应用”项目(2017YFF0209702)。

摘　　要：磁巴克豪森噪声是铁磁性材料动态磁化时磁畴壁的不连续运动过程中产生的一种信号,对材料中的应力比较敏感,在应力检测方面具有广阔的应用前景。在磁巴克豪森噪声应力检测的研究中,常用的磁巴克豪森噪声特征值有均方根、均值、振铃数、包络峰值、包络面积、峰值时间等,采用的特征值不同,其随应力变化规律也有所不同,即不同特征值检测应力的敏感度及精度不同,因此如何选取特征值对应力检测具有重要意义。通过拉伸实验得到了拉伸应力与磁巴克豪森信号之间的关系,计算了拉伸应力与各特征值的关系曲线,分析了各特征值表征应力的敏感程度与误差大小,得到了磁巴克豪森噪声表征应力的最优特征值。Magnetic Barkhausen noise is a signal generated during the discontinuous movement of magnetic domain walls during the dynamic magnetization of ferromagnetic materials.It is sensitive to the stress in the material and has broad application prospects in stress detection.In the research of magnetic Barkhausen noise stress detection,the commonly used magnetic Barkhausen noise features are root mean square,mean,ringing number,envelope peak,envelope area,peak time.Different features have different trends with stress.That is,different features have different sensitivity and accuracy in detecting stress,so how to select feature is important for stress detection.In this paper,the relationship between tensile stress and magnetic Barkhausen signal is obtained through tensile experiments,the relationship curves between tensile stress and each feature is calculated,the sensitivity and error of each feature characterizing stress are analyzed,and the optimal eigenvalue of magnetic Barkhausen noise to represent stress is obtained.

关 键 词：磁巴克豪森噪声 铁磁性材料 应力检测 特征值 

分 类 号：TG115.28[金属学及工艺—物理冶金]