钢结构磁性无损检测中的几个基本技术问题  

Several Basic Technologies in the Magnetic NDT & E for Steel Structures

作　　者：王威[1,2] 章红梅[1] 张富文[1] 周颖[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]西安建筑科技大学土木工程学院,钢筋混凝土结构教研室,西安710055

出　　处：《结构工程师》2008年第6期120-127,共8页Structural Engineers

基　　金：中国博士后科学基金一等资助(20060400176)

摘　　要：磁检测技术是一种有待发展的新技术。与其他各类有损和无损检测方法相比较,铁磁类材料的磁性变化更易于检测和实现在线实时监测。因此,基于磁效应的钢结构及构件无损检测技术凸显出它的优越性来。主要讨论了钢结构磁性无损检测中的几个基本技术问题:磁化技术,磁信号测量技术,磁信号处理技术,磁信号的频域数字滤波,磁检测装置抗干扰技术,退磁技术等。The magnetic measurement technology is a new developed technique and is waited to be exploited in the future. Compared with other non-destructive techniques, the magnetic parameter change could be easily measured and the in-situ magnetic testing could be easily implemented. Therefore, the technology based on magnetic characteristic for ferromagnetic material structures and member has an advantage over other methods. Several basic technologies of the magnetic NDT＆E for steel structures are emphasized in this paper. There are magnetizing technology, magnetic signal measurement technology, magnetic signal processing technology, magnetic digital filter in frequency domain technology, magnetic testing device for anti-interference, demagnetization method, and so on.

关 键 词：磁化 磁信号测量 磁信号处理 磁信号的频域数字滤波 抗干扰 退磁 

分 类 号：TG115.284[金属学及工艺—物理冶金]