论摆动磁场式Π形电磁轭磁场和提升力  

A DISCUSSION ON THE MAGNETIC FIELD AND LIFTING POWER OF Π-SHAPED YOKE OF SWING MAGNETIC FIELD

作　　者：林锡忠 

机构地区：[1]成都华林检测技术研究所,成都610051

出　　处：《无损检测》2004年第3期120-123,共4页Nondestructive Testing

摘　　要：推导了一恒定磁场与一正弦交变磁场合成为摆动磁场的数学关系式,设计出摆动磁场式Π形电磁轭,一次磁化即可实现全方位探伤。该磁化装置的提升力与其在工件中产生的合成磁场无对应关系,因此不能反映对工件的磁化能力。The formula for the swing magnetic field composed of a permanent and a sine alternating magnetic field was derived. A Π-shaped electromagnetic yoke of swing magnetic field was designed, which could be used to detect the defects in all directions by one time magnetization. The lifting power of the yoke was not relative to the magnetic field composed in the workpiece tested, so it could not reflect the magnetizing power of the yoke.

关 键 词：电磁检验 摆动磁场 电磁轭 提升力 磁化装置 

分 类 号：TG115.284[金属学及工艺—物理冶金] TH878.3[金属学及工艺—金属学]