Information and Navigation College, Air Force Engineer University, Xi'an 710077, China.
Sensors (Basel). 2022 Oct 29;22(21):8304. doi: 10.3390/s22218304.
Target azimuth information can help further improve the accuracy of magnetic orientation, but the current periodic magnetic field generated by the magnetic beacon is multivalued, so it is not suitable for azimuth measurement. According to the distribution of a rotating magnetic field and the phase angle measuring principle, we put forward a new magnetic source structure design of a multiple rotating permanent magnet array by adjusting the spacing d, the rotating speed ω and the initial rotation angle φ, and then verified the mathematical model using COMSOL simulation software. A triple structure was obtained by comparison (d3=3d1=3d2=43 m, d3=3d1=3d2=43 m, φ1=0, φ2=4π5 rad. φ3=π rad), which can produce a strong characteristic magnetic signal similar to a heart-shaped field pattern. Finally, a signal transceiver system was set up for the experiment. The experimental result shows that the waveform of the magnetic signal generated by the real beacon meets the requirement of having a unique maximum value and good directivity within a period, which proves the practical application effect of the structure.
目标方位信息有助于进一步提高磁定位的精度，但目前磁信标的周期性磁场是多值的，因此不适合方位测量。根据旋转磁场的分布和相位角测量原理，我们通过调整间距 d、转速 ω 和初始旋转角 φ 提出了一种新型的多旋转永磁体阵列的磁源结构设计，并使用 COMSOL 模拟软件对数学模型进行了验证。通过比较得到了一个三结构（d3=3d1=3d2=43 m，d3=3d1=3d2=43 m，φ1=0，φ2=4π5 rad. φ3=π rad），可以产生类似于心形场模式的强特征磁信号。最后，为实验设置了一个信号收发系统。实验结果表明，真实信标产生的磁信号的波形在一个周期内具有唯一的最大值和良好的指向性，证明了该结构的实际应用效果。
