Contact and Non-Contact Dual-Piezoelectric Energy Harvesting System Driven by Cantilever Vibration

Abstract

In this study, a dual-piezoelectric energy harvesting system with contact and non-contact characteristics was driven by a cantilever beam. The harvester performance of the multipoint energy harvesting system driven by cantilever-beam vibration was designed, detailed analysis and optimization strategies were developed, and its application in the security field was successfully demonstrated. Herein, we provide theoretical guidance for the design of the dual-piezoelectric energy harvesting. We designed and fabricated a prototype of the dual-piezoelectric energy harvesting. A test system was designed and constructed. The relationships among the distance and frequency of the two piezoelectric acquisition mechanisms and the open-circuit voltage were investigated. Additionally, the effects of different loads on the output power were examined. The peak power reached 10.12 mW under a gravitational acceleration of 1g. The analysis indicated that the dual-piezoelectric energy harvest device has a higher energy harvest efficiency than the singlepiezoelectric energy harvest device. Owing to the multipoint harvest strategy, even if a generator suddenly deteriorates or fails, the entire system can maintain a certain power output, which is more commercially feasible. The results of this study indicate that the output of the piezoelectric energy harvesting is stable and reliable and that the output energy satisfies the requirements for a safety warning device.

Self-Powered Wireless Temperature and Vibration Monitoring System by Weak Vibrational Energy for Industrial Internet of Things

“…Therefore, the wireless systems installed on the equipment are expected to be powered by vibration energy harvesting for equipment operating conditions monitoring. In general, some traditional vibration energy harvesting technologies such as piezoelectric, – electromagnetic, , and electrostatic – can transfer vibration energy into electrical output. However, these energy harvesting technologies face a lot of challenges in harvesting the low-frequency and microamplitude vibration energy generated by the mechanical equipment, such as high resonance frequency, large manufacturing volume, and additional power requirement, which limits their further development.…”

Global Dynamic Analysis of a Typical Bistable Piezoelectric Cantilever Energy Harvesting System

“…Among these, attaching permanent magnets to associated structures is one of the most popular methods to construct PEHs, as permanent magnets can reproduce the nonlinear restoring forces. It was generally accepted that compared with linear PEHs, magnet-based nonlinear ones have a wider frequency bandwidth, and thereby a higher efficiency of energy harvesting [9,10]. The use of permanent magnets in PEHs also helps to obtain multiple equilibrium positions and multiple potential wells of the energy harvesting systems [11]; thus, magnet-based PEHs can be useful in the generation of higher energy outputs over a wide range of frequencies.…”

A broadband piezoelectric vibration energy harvesting system based on sensorless direct resonance tuning technique

“…To tackle this problem, the energy harvesting (EH) technology has been introduced [4], which can convert various environmental energy into electricity, including lights, vibrations and others [5,6,7,8]. Piezoelectric energy harvesting (PEH) is a widely adopted EH solution in the field of vibration EH [9,10,11,12]. Although high quality factor of a cantilever based PEH can improve the performance at the mechanical resonance point, the operating frequency band is greatly limited.…”