基于矫顽力的应力无损检测装置设计与开发  

Design and Development of Stress Nondestructive Testing Device Based on Coercivity

作　　者：任旭虎[1] 葛安凤 冯阳 王智敏 赵雪阳 REN Xu-hu;GE An-feng;FENG Yang;WANG Zhi-min;ZHAO Xue-yang(School of Ocean and Spatial Information,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580

出　　处：《仪表技术与传感器》2022年第12期45-50,72,共7页Instrument Technique and Sensor

摘　　要：为了探测铁磁材料的应力集中区域,评估材料的早期损伤,文中对矫顽力检测研究机理进行了深入研究,并开发了一套基于矫顽力的应力无损检测装置。主要包括可控磁场激励、探头模块、信号采集与调理电路模块,实现了对被测铁磁材料充分磁化,并开发了嵌入式主机和串口屏程序,实现了磁信号采集、矫顽力数值计算和参数显示等功能。最后经过实验证明了该装置能准确检测出试件矫顽力并说明矫顽力与拉应力、剩磁呈线性关系,证明了剩磁可作为矫顽力检测的依据。In order to detect the stress concentration area of ferromagnetic materials and evaluate the early damage of materials, the research mechanism of coercive force detection was studied deeply in this paper, and a set of stress nondestructive detection device based on coercive force was developed, which mainly included controllable magnetic field excitation, probe module, signal acquisition and conditioning circuit module, realizing full magnetization of the measured ferromagnetic material, and embedded host and serial screen program was developed, realizing magnetic signal acquisition, coercivity numerical calculation and parameter display.Finally, the experiment proves that the device can accurately detect the coercivity of the specimen, and the coercivity has a linear relationship with tensile stress and remanence, which proves that the remanence can be used as the basis of coercivity detection.

关 键 词：矫顽力 无损检测 磁滞回线 管道缺陷 剩磁 铁磁材料 

分 类 号：TM936[电气工程—电力电子与电力传动]