AI 中文总结
本文提出梯度场频率编码方法，利用磁-机械谐振器在磁场中的频率偏移实现一维定位，实验验证了沿线性轨迹的准确定位，为无线定位提供了简化硬件的新途径。
AI 中文摘要
磁-机械谐振器（MMRs）已成为工业和医疗环境中无线定位和远程感应测量的有前景的无源传感器。然而，利用接收线圈的空间灵敏度分布实现定位精度的基本限制仍然是一个关键挑战。在本工作中，我们证明了一种由两块反平行排列的永磁体组成的MMR，在外部施加磁场作用下，其机械共振频率会发生可测量的偏移，我们利用这一特性进行空间编码。我们推导并实验验证了一种方法，该方法将已知磁场梯度场中的一维位置的频率偏移映射出来，展示了沿线性轨迹的准确定位。这种梯度场频率编码方法在概念上不同于传统的接收线圈阵列灵敏度编码，具有简化硬件要求并提高定位精度的潜力。
英文摘要
Magneto-mechanical resonators (MMRs) have emerged as promising passive sensors for wireless localization and remote inductive sensing in industrial and medical environments. However, fundamental limits on achievable localization accuracy using the spatial sensitivity profiles of receive coils remain a key challenge. In this work, we demonstrate that an MMR - comprising two permanent magnets in an anti-parallel arrangement - exhibits a measurable shift in its mechanical resonance frequency in response to an externally applied magnetic field, a property we exploit for spatial encoding. We derive and experimentally validate a method that maps frequency shifts of 1D positions within a known magnetic gradient field, demonstrating accurate localization along a linear trajectory. This gradient-field frequency encoding approach constitutes a conceptually distinct alternative to conventional sensitivity encoding with receiver coil arrays, with the potential to simplify hardware requirements while improving localization accuracy.
Comments4 pages, 3 figures
