包络式磁弹索力传感器设计及钢缆索应力试验研究  

Design of Enveloping Magneto-elastic Cable Force Sensor and Stress Test of Steel Cable

作　　者：郭涛 GUO Tao(State Owned Wuhu Machinery Factory,Anhui Wuhu 241000,China)

机构地区：[1]国营芜湖机械厂

出　　处：《失效分析与预防》2019年第6期372-377,共6页Failure Analysis and Prevention

摘　　要：基于磁弹法的磁弹传感器因其结构简单、输出功率大、使用寿命长、动态响应好以及过载保护能力强等优点,广泛应用于在役桥梁索的索力测量与监测,可有效预防循环应力产生疲劳失效。为了解决现有的套筒式和旁路式磁弹传感器存在的一致性差、标定难度大、磁化不完全以及存在耦合效应的问题,提出一种新型包络式磁弹传感器,采用基于柔性印刷电路板的检测线圈,贴合效果更好。开展钢缆索应力测量试验,结果表明:全包络式磁弹传感器索力线性度、灵敏度得到极大提高,且磁化效果更好。柔性印刷电路板的检测线圈设计,较好地实现了磁弹传感器的可重构设计,便于安装拆卸。The magneto-elastic force sensor based on magneto-elastic effect is widely used in cable force measurement and monitoring of in-service bridge cables due to its simple structure,large output power,long service life,good dynamic response and strong overload protection.In order to solve the problems of poor consistency,difficult calibration,incomplete magnetization and coupling effect of the existing sleeve type and bypass type magneto-elastic sensors,a novel envelope type magnetic elastic sensor is proposed,which is based on flexibility.The detection coil of the printed circuit board has a better bonding effect.The steel cable stress measurement test is carried out.The results show that the cable linearity and sensitivity of the full-envelope magneto-elastic sensor are greatly improved and the magnetization effect is better.Further,the detection coil design of the flexible printed circuit board better realizes the reconfigurable design of the magnetic elastic sensor,which is convenient for installation and disassembly.

关 键 词：钢缆索 磁弹索力传感器 应力 柔性印刷电路板 

分 类 号：TG115.284[金属学及工艺—物理冶金]