隧道磁电阻传感器在钢丝绳检测系统中的应用

Application of Tunnel Magnetoresistance Sensor in Wire Rope Detection System

在电梯钢丝绳检测系统中,通过励磁装置、磁场检测装置、数据采集、数据处理、监控显示、报警系统对钢丝绳进行检测。为实现对钢丝绳LF缺陷的检测,建立单丝磁偶极子模型进行仿真,根据隧道磁电阻传感器(Tunnel Magneto Resistance简称TMR)的原理和特性,对TMR传感器进行对称环绕分层式排列,减小检测过程中的信号干扰,通过仿真选择合适的提离高度,使检测系统满足对缺陷的检测要求。结果表明,TMR磁传感器可以减轻装置重量,并且可以达到LF检测标准。

The excitation device,the magnetic field detection device,the data acquisition,the data processing,the monitoring display and the alarm system are tested in the nondestructive testing system of the elevator steel wire rope.In order to test the LF defects of steel wire rope,the single dipole model is established for simulation.According to the principle and properties of tunnel magneto resistance(TMR)sensor,the TMR sensors are in the ambient and layered arrangement to reduce signal interference in detection.Proper lift-off height is obtained from simulation so that the detection system can meet the requirements of defect detection.It is shown that the TMR magnetic can reduce the device weight and meet the LF detection standards.