桥梁缆索内部断丝漏磁检测磁化器设计  

Design of Magnetic Flux Leakage Detection Magnetizer for Broken Wire in Bridge Cable

作　　者：陶志伟 孙令司 武新军[1] TAO Zhiwei;SUN Lingsi;WU Xinjun(School of Mechanical Science and Engineering,Huazhong University of Science and Technology)

机构地区：[1]华中科技大学机械科学与工程学院

出　　处：《仪表技术与传感器》2025年第2期28-33,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金联合基金重点支持项目(U21A20139)。

摘　　要：针对桥梁缆索难以磁化到饱和导致的内部断丝检测困难的问题,采用有限元仿真研究磁化器几何参数对内部断丝的影响。为兼顾检测信号和磁化器质量,提出信号峰峰值与磁化器质量之比的指标,以此优化磁化器尺寸,优化后缆索断丝的信号幅值大幅增加,其中第3层断丝信号幅值增幅最大,约为原来的5.44倍。搭建实验平台验证磁化器优化结果,结果表明:缆索第1层到第4层断丝检测信号明显,实验与仿真结果的最大误差为12.41%,实验与仿真基本一致。Focused on the challenge of detection in the internal broken wire in bridge cable caused by the difficulty of achie-ving saturation magnetization of steel wires,this paper used finite element simulation to study the influence of the geometric pa-rameters of magnetizer on the internal broken wire.To balance the mass of the magnetizer and the amplitude of the detection sig-nal,the ratio of signal peak value to the mass of the magnetizer was proposed,and based on this,the magnetizer was optimized.After optimization,the signal amplitude of broken wire in bridge cable increased significantly,with the third layer experiencing the largest increase,approximately 5.44 times the original.An experimental platform was established to verify the optimization results of the magnetizer.The result shows that the detection signals for broken wires in the first to fourth layer of the cable are obvious,and the maximum error between the experiment and simulation is about 12.41%,the experiment is highly consistent with the sim-ulation.

关 键 词：桥梁缆索 漏磁检测 有限元仿真 断丝 

分 类 号：TG115.28[金属学及工艺—物理冶金]