This paper presents ambient mechanical vibrations as an alternative source for energy harvesting, especially beneficial where alternatives such as light, wind, biomass and thermal energy are limited, e.g., powering underground sensors. Transduction of ambient kinetic energy, e.g., the vibrations from thunder and field work, into electrical energy using piezoelectric generators has been investigated, utilizing a nonlinear bistable broadband piezoelectric harvester. A new model for the bistable piezoelectric harvester is suggested based on the standard Butterworth van Dyke model and its validity demonstrated through simulations. For efficient extraction of the transduced energy, we employ synchronous charge extraction (SCE) and parallel synchronized switch harvesting on inductor (SSHI). The switching in these circuits is implemented using a fully self-propelled, low-power electronic breaker circuit, capable of detecting extrema in the input to perform switching. The power outputs from simulation of the bistable harvester have been presented, with the SCE and parallel SSHI providing respective average outputs of 78.5µW and 125µW for a sinusoidal input of 0.326N at 10Hz applied to a 69.1 × 16.8 × 0.64 mm3 cantilever (piezoelectric dimensions 35.56 × 14.48 × 0.2 mm3). This shows significant gains over the harvested power reported in literature.
展开▼
机译：本文介绍了周围的机械振动作为能量收集的替代来源，特别是在光，风，生物质和热能等替代物受到限制（例如为地下传感器供电）的情况下特别有益。已经研究了利用非线性双稳态宽带压电收割机，利用压电发电机将周围动能，例如雷声和野外作业的振动转换为电能。根据标准的Butterworth van Dyke模型，提出了一种双稳态压电收割机的新模型，并通过仿真证明了其有效性。为了有效地提取所转换的能量，我们采用了同步电荷提取（SCE）和电感器上的并行同步开关收集（SSHI）。这些电路中的开关是使用完全自我推进的低功率电子断路器电路实现的，该电路能够检测输入端的极值以执行开关。提出了双稳态收割机仿真的功率输出，其中SCE和并行SSHI在10Hz的正弦输入0.326N上为69.1×16.8×0.64 mm 3提供了分别为78.5µW和125µW的平均输出悬臂（压电尺寸35.56×14.48×0.2 mm 3 ）。这表明，与文献报道的收获能力相比，收获显着。
展开▼
