最优磁化模型的磁通量传感器仿真实验与应用  

Simulation Experiment and Application of Magneto-Elastic Sensor for Optimal Magnetization Model

作　　者：秦志勇 邓年春[1,2] Qin Zhiyong;Deng Nianchun(School of Civil and Architectural Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Mitigation and Engineering Safety,Nanning 530004,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西防灾减灾与工程安全重点实验室,广西南宁530004

出　　处：《石家庄铁道大学学报（自然科学版）》2022年第1期70-75,共6页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(51868006)。

摘　　要：为了优化磁通量传感器测量的精度与稳定性,以更好地满足桥梁拉索应力测量需求,根据钢绞线的磁特性曲线与Biot-savar定律,设计了最优激励模型的CCT20穿入式磁通量索力传感器,对其进行拉力试验,并采用有限元软件模拟了张拉试验中传感器测钢绞线的全过程,还提出了相关性系数来增强试验与仿真间的可对比性,模拟结果与试验结果基本吻合,证明了有限元模型的有效性,进一步分析了传感器对钢绞线的磁化效果。试验及仿真结果表明,穿入式传感器测量结果与钢绞线张力呈线性关系,多次重复测量性能优于0.3%;传感器设计励磁源下,钢绞线被测区域磁感应强度为0.77 T,位于钢绞线最大磁导率附近,获得最佳测量效果,励磁模型达到最优。并对汕头新津河特大桥拉索进行了应力状态检测,最终得出结论,CCT20穿入式磁通量索力传感器测量结果准确,最大测量偏差为0.8%。In order to optimize the measurement accuracy and stability of magneto-elastic sensor,and meet requirements of bettering bridge cable stress measurement,a CCT20 penetrating magneto-elastic cable force sensor with optimal excitation model was designed according to the magnetic characteristic curve of steel strand and Biot-Savar law,and conducted tensile test on it.The whole process of measuring the steel strand by the sensor was simulated with the finite element software.The simulation results were basically consistent with the test results,which proved the validity of the finite element model.Furthermore,the magnetization effect of the sensor on the steel strand was analyzed.The results show that there is a linear relationship between the measurement results of the sensor and the tension of the steel strand and the repeated measurement performance is better than 0.3%F.S;In the condition of setting excitation,the magnetic induction intensity of the measured area of the steel strand is 0.77 T,which is located near the maximum permeability of the steel strand.There is a best measurement effect,and the excitation model is optimal.Later,the stress state of the cable of Xinjin River Bridge in Shantou city is tested,and then come to the conclusion that the measurement result of CCT20 penetrating magneto-elastic cable force sensor is accurate;the maximum measurement deviation is 0.8%.

关 键 词：磁弹效应 磁通量传感器 索力测量 张拉试验 汕头新津河特大桥 

分 类 号：U446[建筑科学—桥梁与隧道工程] U448.22[交通运输工程—道路与铁道工程]