Design of a linearized magnetic spring for body-worn inertial energy harvesters


Huang, Hui, Merrett, Geoff V. and White, Neil M. (2012) Design of a linearized magnetic spring for body-worn inertial energy harvesters At International Workshop on Algorithms and Concepts for Networked Sensing Systems Powered by Energy Harvesters (EnHaNSS'12), Belgium. 11 - 14 Jun 2012. 4 pp.

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Description/Abstract

A potential method for powering body-worn sensors is that of inertial energy harvesting; extracting energy from the movement of the human body. However, the frequencies typically present are <5 Hz, hence requiring physically large devices. A promising solution utilizes a magnetic spring, but these exhibit a non-linear relationship between force (and hence resonant frequency) and displacement. This paper describes a design for implementing a linearized magnetic spring. Finite element analysis is used to model this device and compare against those reported in the literature. Simulation results indicate that, compared to the state-of-the-art, this design exhibits improved linearity (2%) across a wider displacement range (±25 mm). A prototype has been fabricated, and the simulation results experimentally validated.

Item Type: Conference or Workshop Item (Paper)
Additional Information: (c) 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.978-1-4673-1786-3/12/$31.00 (c)2012 IEEE.
Venue - Dates: International Workshop on Algorithms and Concepts for Networked Sensing Systems Powered by Energy Harvesters (EnHaNSS'12), Belgium, 2012-06-11 - 2012-06-14
Related URLs:
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Organisations: Electronic & Software Systems, EEE
ePrint ID: 337543
Date :
Date Event
26 April 2012Submitted
June 2012Published
Date Deposited: 26 Apr 2012 17:35
Last Modified: 17 Apr 2017 17:15
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/337543

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