磁致伸缩位移传感器测量盲区失效机理与磁屏蔽优化  

Failure Mechanism of Measurement Blindness in Magnetostrictive Displacement Sensors and Optimization of Magnetic Shielding

作　　者：边铁錾 李明明[1,2] 王鑫玉 黄文美[1,2] 翁玲[1,2] Bian Tiezan;Li Mingming;Wang Xinyu;Huang Wenmei;Weng Ling(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin 300130 China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology,Tianjin 300130 China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津300130 [2]河北工业大学河北省电磁场与电器可靠性重点实验室,天津300130

出　　处：《电工技术学报》2024年第17期5300-5310,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51801053,52077052);河北省自然科学基金(E2022202067);中央引导地方科技发展资金项目(226Z1704G)资助。

摘　　要：磁致伸缩位移传感器在检测线圈附近存在测量盲区,在受限安装空间内有效测量范围难以满足应用需求。针对这一问题,基于魏德曼效应、磁弹性耦合效应和维拉里效应,建立合成磁场作用下磁致伸缩位移传感器的测量盲区模型,分析测量盲区内传感器失效机理。搭建实验平台提供可调的脉冲电流和轴向磁场,选用直径为0.6mm的(Fe_(83)Ga_(17))_(99.4)B_(0.6)、Fe_(46.5)Ni_(48.5)Cr_(2)Ti_(2.5)Al_(0.5)和Fe_(30)Co_(70)波导丝验证模型的准确性,测量盲区受永磁体产生的轴向磁场影响,并且随轴向磁场增大。增加静磁屏蔽装置并确定最佳参数,制作样机并测试表明:优化后的(Fe_(83)Ga_(17))_(99.4)B_(0.6)波导丝传感器测量盲区由30.05μs缩短为18.45μs,宽度缩短了38.6%;Fe_(46.5)Ni_(48.5)Cr_(2)Ti_(2.5)Al_(0.5)波导丝传感器测量盲区由31.15μs缩短为19.15μs,宽度缩短了38.5%;Fe_(30)Co_(70)波导丝传感器测量盲区由29.55μs缩短为18.85μs,宽度缩短了36.2%。Magnetostrictive displacement sensors use the Weidmann effect to achieve displacement measurement,with high accuracy,non-contact,high reliability and adaptable to harsh environments,etc.,and are widely used in a variety of fields.Due to the existence of measurement blind zones near the detection coil,the effective measurement range of magnetostrictive displacement sensors is difficult to meet the application requirements in the field of hydraulic cylinders,robotic arms and other areas where the installation space is limited.This problem limits the development of precision measurement and precision displacement control.In order to reduce the measurement blind zone of magnetostrictive displacement sensors in the vicinity of the detection coil and to widen the application range of magnetostrictive displacement sensors in environments where measurement space is limited.Based on the Weidmann effect,magneto-elastic coupling effect and Villari effect,this paper theoretically investigates the relationship between the measurement blind zone of magnetostrictive displacement sensors and the synthetic magnetic field,establishes a model of the measurement blind zone of magnetostrictive displacement sensors under the action of the synthetic magnetic field,and analyses the failure mechanism of magnetostrictive displacement sensors in the measurement blind zone.The theoretical model shows that the measurement blind zone is affected by the axial magnetic field generated by the permanent magnet,and the measurement blind zone increases with the axial magnetic field.An experimental platform was built to provide adjustable pulse current and axial magnetic field,and experiments were conducted using(Fe_(83)Ga_(17))_(99).4B0.6,Fe_(46.5)Ni_(48.5)Cr_(2)Ti_(2.5)Al_(0.5) and Fe_(30)Co_(70) waveguide wires with a diameter of 0.6 mm,which verified the accuracy of the measurement blind zone model,and a solution was developed to reduce the measurement blind zone by adding a cylindrical multilayer magnetic shielding device.It is concluded that t

关 键 词：磁致伸缩位移传感器 测量盲区模型 静磁屏蔽 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TM936[自动化与计算机技术—控制科学与工程]