基于内部级数法的高均匀度磁传感器标定装置设计

Design of Magnetic Sensor Calibration Device with High Uniformity Based on Internal Series Method

在对磁传感器进行标定时,Maxwell线圈在磁梯度场均匀度要求高且对线圈空间尺寸有严格限制时并不适用,针对这个问题设计了一种具有高均匀度的磁梯度线圈作为磁传感器标定装置。应用内部级数法对单个轴对称线圈产生的磁场进行数理分析,进而得到其磁场梯度分布的一般特性,在此基础上计算出高均匀度磁梯度线圈的结构参数与均匀度。对线圈模型进行仿真分析并完成了磁梯度线圈装置的设计和制作。最后,根据仿真结果与实际测量得到的数据,验证了设计的正确性。

Maxwell coil cannot calibrate the magnetic sensor when the high uniformity of magnetic gradient is required and the space size is strictly limited. To solve this problem,a magnetic gradient coil with high uniformity was designed as magnetic sensor calibration device. Internal series method was used to analyse the magnetic field that a single axial symmetric coil generated,and the general characteristics of the magnetic gradient field distribution were got. On this basis,the structural parameters and the uniformity of magnetic gradient coil with high uniformity were calculated. Simulation analyses were carried out on the coil model and the design and production of magnetic gradient coil device were finished. Finally,the data obtained from actual measurement and simulation proved the correctness of the design.