提出了一种新型组合螺旋压电能量收集器。该收集器的底部是直角螺旋结构,顶部是圆弧螺旋结构,圆弧螺旋结构固定在直角螺旋结构的质量块上。通过旋转圆弧螺旋结构90°,可以得到四种结构,角度分别为0°,90°,180°,270°。直角螺旋结构的设计可以降低谐振频率,而圆弧螺旋结构的设计不仅可以降低谐振频率,还可以使整体结构进行多方向能量收集,从而提高输出。文章所提到的单个悬臂梁结构的厚度为1 mm,宽度为6 mm。通过计算及仿真可得,当两种结构的组合角度为180°时,可以得到最大输出电压为13 V,最大输出功率为1.3 mW。

A novel combined helical piezoelectric energy harvester is proposed. The bottom of this harvester was a right-angle spiral structure, and the top of this harvester was an arc spiral structure. The arc spiral structure was attached to the mass block of the right-angle spiral structure. Four structures can be obtained by rotating the arc spiral with 90 degrees, and the angles are 0 degrees, 90 degrees, 180 degrees, and 270 degrees, respectively. The design of the right-angle spiral structure could reduce the resonant frequency, and the design of the arc spiral structure could not only reduce the resonant frequency, but also enable the overall structure to perform multi-directional energy harvesting, thereby increasing the output. The thickness of the single cantilever beam structure was 1 mm and the width was 6 mm. According to the calculation and the simulation, when the combined angle of the two structures is 180 degrees, the maximum output voltage is 13 V and the maximum output power is 1.3 mW.