LAUSR

The synchronized switch interface circuit is believed to boost piezoelectric power generation. The threshold voltage of electronic components causes rectification loss and delay in peak detection. This work reports a novel design of a mechanical rectification (MR) piezoelectric vibration energy harvester (MR-PVEH). Compact and low-loss MR is achieved by the double switch with five electrodes contact at the cantilever tip. The switch as a mechanical stopper also contributes to broadband performance. The saturation voltage and response frequency range can be adjusted in the modeling and simulation of nonlinear electromechanical coupling vibration. Self-adapting MR-optimized synchronous electric charge extraction (M-OSECE) circuit is also proposed with fewer electronic components in this article and shows an extra 60% increase in generated power than the traditional standard energy harvesting circuit (SEH) in the test. This novel design gives a promising solution for self-adapting synchronous switching in broadband piezoelectric vibration energy harvesting.