2 April 2015 Implementation of a robust hybrid rotary-translational vibration energy harvester for autonomous self-powered acceleration measurement
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Abstract
In this paper, a self-powered wireless sensor node utilising ambient vibrations for power is described. The device consists of a vibration energy harvester, power management system, microcontroller, accelerometer, RF transmitter/receiver and external LED indicators. The vibration energy harvester is adapted from a previously reported hybrid rotary-translational device and uses a pair of copper coil transducers to convert the mechanical energy of a magnetic sphere into usable electricity. The device requires less than 0.8 mW of power to operate continuously in its present setup (with LED indicators off) while measuring acceleration at a sample rate of 200 Hz, with the power source providing 39.7 mW of power from 500 mg excitations at 5.5 Hz. When usable input energy is removed, the device will continue to transmit data for more than 5 minutes.
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Owen R. Payne, Luke A. Vandewater, Chandarin Ung, Scott D. Moss, "Implementation of a robust hybrid rotary-translational vibration energy harvester for autonomous self-powered acceleration measurement", Proc. SPIE 9431, Active and Passive Smart Structures and Integrated Systems 2015, 943126 (2 April 2015); doi: 10.1117/12.2084432; https://doi.org/10.1117/12.2084432
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