次级线圈绕线锥度对LVDT静态特性的影响  

Effect of secondary coil winding taper on static characteristics of LVDT

作　　者：张峻霖 潘海鸿[1,2] ZHANG Junlin;PAN Haihong(College of Mechanical Engineering,Guangxi University,Nanning 530004,CHN;Guangxi Key Lab of Manufacturing Systems and Advanced Manufacturing Technology,Nanning 530004,CHN)

机构地区：[1]广西大学机械工程学院,广西南宁530004 [2]广西制造系统与先进制造技术重点实验室,广西南宁530004

出　　处：《制造技术与机床》2019年第11期135-138,142,共5页Manufacturing Technology & Machine Tool

基　　金：广西自然科学基金重点项目(2017JJD150010)

摘　　要：三段式差动变压器式位移传感器(LVDT)由于结构特性,两次级线圈近端和远端的磁场分布不均,导致LVDT静态特性较差。针对上述弊端提出一种改善线性度和灵敏度的新绕线方法,即改变骨架锥度来改变次级线圈绕线锥度,在ANSYS Maxwell中建立LVDT有限元模型,在Maxwell Circuit Editor中设计外部激励电路,进行瞬态磁场的耦合仿真。结果表明,保持其他因素不变,只改变骨架锥度调节次级线圈绕线锥度的方法能够有效改善LVDT的静态特性,新型LVDT的线性度是传统的2.4倍。Due to the structural characteristics of the three-stage differential transformer displacement sensor(LVDT),the magnetic field distribution of the proximal and distal ends of the two-stage coil is uneven,which makes the static characteristics of the LVDT poor,and proposes an improved linearity for the disadvantages.And the new winding method of sensitivity,the finite element model of LVDT is established in ANSYS Maxwell,and the external excitation circuit is designed in Maxwell Circuit Editor to perform the coupling simulation of transient magnetic field.The results show that by keeping the other factors constant,the static characteristics of the LVDT can be improved only by changing the taper of the skeleton to adjust the taper of the secondary coil.The linearity of the new LVDT is 2.4 times that of the conventional one.

关 键 词：LVDT 静态特性 线性度 绕线锥度 MAXWELL 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]