A broadband hybrid energy harvester with displacement amplification decoupling structure for ultra-low vibration energy harvesting

Abnormal vibration of electrical equipment requires a large number of distributed sensors to monitor. However, there are issues that require maintenance and power supply. This work proposes a working mode for harvesting the low-grade vibration energy of electrical equipment, which can replace vibration sensors and achieve self-powered monitoring of equipment vibration. Additionally, we present a novel energy harvesting module that solves the issue of converting random vibration into linear vibration. The introduction of laminated hinges achieves large displacement output under small amplitude vibration and energy harvesting from random low amplitude vibration within a bandwidth of 2–23 Hz. The impact of geometric parameters on the proposed system is evaluated through parameter analysis. Experimental findings reveal that the device can achieve a maximum power output of 17.84 mW at an ultra-low 0.05 g acceleration., resulting in a peak power density of approximately 44.87 W/m3. Compared to traditional methods, peak power has increased by 266.2 %. Wireless vibration online monitoring systems for visualizing vibration status are created by combining the equipment with repeaters and phones. This research introduces a unique strategy for remote online vibration monitoring that may be used in distributed sensor systems to identify malfunctioning machinery. •High-efficiency harvesting of ultra-low vibration realized by using decoupling device.•Laminated hinge realizes micro-motion input and large displacement output.•Realized transformation of omnidirectional disordered vibration into linear motion.•An omnidirectional energy harvester is proposed for online vibration monitoring.