A Vibrational Energy Harvesting Sensor Based on Linear and Rotational Electromechanical Effects
Source abstract
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: crossref · Quality: baseline
Research context
OpenAlex topics: Innovative Energy Harvesting Technologies · Energy Harvesting in Wireless Networks · Wireless Power Transfer Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
Funding
Department of Energy Office of Weapon Technology Manufacturing and Maturation
References (32)
Show source-provided references
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