新型同步机械开关提升压电能量收集效率及其在非线性系统下的特性分析

摘要

Aiming at the high power consumption in the self-powered synchronized switch energy harvesting with inductor circuit ( SP-SSHI) in the piezoelectric energy harvesting ( PEH) technology, the research about the synchronized switch energy harvesting with inductor circuit ( SSHI) , self-powered SSHI using electric switches ( ESP-SSHI) circuit and the displacement extremum detection sensor was prosented. Also studied the existing mechatronic switches for SP-SSHI ( MSP-SSHI) . Based on this, a new displacement extremum detection sensor was pro-posed, and which is also used in the SP-SSHI to form a new circuit. A model was established for analysis the system, also experiments. The results indicate that the new MSP-SSHI system shows better behavior in energy harvesting than traditional energy harvesting methods. Even more, we studied the feature of the MSP-SSHI when it works at nonlinear environment. The result shows that the nonlinear MSP-SSHI can operate at broader frequency range.%针对压电能量收集(PEH)技术中的自供电电感同步开关能量收集电路(SP-SSHI)有相当大的能量损失问题,对电感同步开关能量收集电路(SSHI)、采用电子开关的SP-SSHI(ESP-SSHI)电路以及位移极值检测传感器等方面进行了研究,并通过对已有的同步机械开关的SP-SSHI(MSP-SSHI)进行了总结归纳,提出了一款新型的同步机械开关.将该同步机械开关运用到自供电电感同步开关能量收集电路中,且对该机电MSP-SSHI系统进行了建模分析和实验对比.研究结果表明:MSP-SSHI工作在线性条件下时,比传统能量收集电路有较高的能量收集效率;工作在双稳态惯性振荡非线性系统下时,有更宽的能量收集频率范围.