AI 中文总结
本研究识别并表征了磁机械谐振器的倾斜模式，推导其频率分析模型，经实验证实该模式无交叉耦合，可作为新传感自由度应用于相关场景。
AI 中文摘要
磁机械谐振器（MMRs）是一类新兴的无源无线传感器，其扭转振荡模式近期已被应用于传感与追踪场景。本研究中，我们报道了一种第二种机械模式——倾斜模式的识别与表征，该模式可提供扭转模式无法覆盖的轴向上的灵敏度，为单个MMR传感器的追踪与传感开辟了新的自由度。我们推导了分析模型，用于预测倾斜频率随谐振器几何参数与磁参数的变化关系，对比了倾斜模式频率与扭转模式频率，并在小角度近似下得到了扭转模式与倾斜模式间的特征频率比。采用三轴激励与检测的实验表征证实了该模式的存在及其方向选择性，值得注意的是，三轴频率响应中未观测到扭转模式与倾斜模式间的交叉耦合。我们进一步表明，倾斜模式频率遵循预测的与磁体距离的依赖关系，验证了分析模型的正确性，且该模式与扭转模式类似，适用于传感应用。
英文摘要
Magneto-mechanical resonators (MMRs) are an emerging class of passive, wireless sensors. Their torsional oscillation mode has recently been established for sensing and tracking applications. In this work, we report the identification and characterization of a second mechanical mode, the tilting mode, that provides sensitivity along an axis inaccessible to the torsional mode, opening up a new degree of freedom for tracking and sensing with a single MMR sensor. We derive an analytical model predicting the tilting frequency as a function of the geometric and magnetic parameters of the resonator, compare the tilting mode frequency to that of the torsional mode, and obtain a characteristic frequency ratio between the torsional and the tilting mode in the small angle approximation. Experimental characterization using three-axis excitation and detection confirms the mode's existence and its directional selectivity. Notably, the three-axis frequency response shows no observable cross-coupling between the torsional and the tilting mode. We further show that the tilting mode frequency follows the predicted dependence on magnet distance, confirming the analytical model and the mode's applicability for sensing, analogous to that of the torsional mode.
CommentsThis work has been submitted for possible publication
