针对高转速船舶轴系上传感器的自供能需求，提出了一种旋转轴系限幅拨动式压电自供能系统。该系统由限幅拨动式压电能量收集装置、能量管理电路和无线传输模块组成。基于简化的限幅拨动式压电能量收集装置，建立了机电动力学模型，并通过有限元分析完成结构设计。能量管理电路采用 BQ25570 芯片实现高效能量管理。综合考虑拨片厚度，确定厚度为 0. 8 mm 时能量收集效果最佳。实验表明，在 2 000 rpm 转速下，系统平均能量收集效率达到 0. 78 mW，可在 1 130 s 内将容量为 0. 1 F 的超级电容从 0 充至 4. 2 V。通过对无线传输模块的定时控制，验证了系统能为高转速船舶轴系传感器实现自供能且能存储多余能量，在无能量输入情况下可持续供能。

To meet the self-powering requirements of sensors mounted on high-speed marine propulsion shafts， a rotational-shaft limited-amplitude toggle-type piezoelectric self-powered system is proposed. The system consists of a limited-amplitude toggle-type piezoelectric energy harvester， an energy management circuit， and a wireless transmission module. A simplified electromechanical dynamic model of the harvester is established， and the structural design is completed through finite-element analysis. The energy management circuit employs the BQ25570 chipset to achieve efficient power management. Considering the influence of the toggle-plate thickness， a thickness of 0. 8 mm is found to provide the optimal energy harvesting performance. The experimental results show that at a rotational speed of 2 000 rpm， the system achieves an average energy harvesting power of 0. 78 mW and can charge a 0. 1 F supercapacitor from 0 to 4. 2 V within 1 130 s. By implementing the timed control of the wireless transmission module， the system is demonstrated to effectively provide self-powering capabilities for sensors on high-speed ship shafts， while also storing surplus energy and sustaining operation in the absence of input energy.

TN384；TN965