Work

A Vibrational Energy Harvesting Sensor Based on Linear and Rotational Electromechanical Effects

Year: 2024

Type: article

Abstract: In this investigation, a magnetically coupled double-spring design is presented for harvesting low-level non-stationary random vibrational energy. The sensor relies on multimodal coupling between the translation and rotation of a two-spring magnet and coil system to widen the harvesting bandwidth. Energy methods are used to develop a model to characterize the electromechanical response of the system, the solution of which is obtained using stochastic techniques based on a particle swarm algorithm. This approach provides an efficient method to estimate system parameters that otherwise are difficult or impossible to determine with independent measurements. The experimental results demonstrate agreement with the theoretical predictions over a limited bandwidth. The sensor can effectively harvest non-stationary vibration energy down to 10−4 g within a limited bandwidth of 130–150 Hz. The sensor prototype has an operational volume of 2.6 cm3 with a calculated power density of 0.2 W/cm3. The sensor’s small size results in a coupling efficiency of approximately 6% across the tested bandwidth.

Source: Applied Sciences

DOI: 10.3390/app14167072

Authors: Sean K. Lehman, Karl A. Fisher

Institution: Lawrence Livermore National Laboratory

Language: English

Topic: Innovative Energy Harvesting Technologies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,728

Funder: U.S. Department of Energy