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Microstereolithography of Three-Dimensional Polymeric Springs for Vibration Energy Harvesting
Joint Authors
Zhou, Fan
Lynch, Kevin
Wang, Chen
Sun, Cheng
Reissman, Timothy
Baker, Evan
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-21
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
The inefficiency in converting low frequency vibration (6~240 Hz) to electrical energy remains a key issue for miniaturized vibration energy harvesting devices.
To address this subject, this paper reports on the novel, three-dimensional micro-fabrication of spring elements within such devices, in order to achieve resonances and maximum energy conversion within these common frequencies.
The process, known as projection microstereolithography, is exploited to fabricate polymer-based springs direct from computer-aided designs using digital masks and ultraviolet-curable resins.
Using this process, a micro-spring structure is fabricated consisting of a two-by-two array of three-dimensional, constant-pitch helical coils made from 1,6-hexanediol diacrylate.
Integrating the spring structure into an electromagnetic device, with a magnetic load mass of 1.236 grams, the resonance is measured at 61 Hz, which is within 2% of the theoretical model.
The device provides a maximum normalized power output of 9.14 μW/G (G=9.81 ms−2) and an open circuit normalized voltage output of 621 mV/G.
To the best of the authors knowledge, notable features of this work include the lowest Young’s modulus (530 MPa), density (1.011 g/cm3), and “largest feature size” (3.4 mm) for a spring element in a vibration energy harvesting device with sub-100 Hz resonance.
American Psychological Association (APA)
Baker, Evan& Reissman, Timothy& Zhou, Fan& Wang, Chen& Lynch, Kevin& Sun, Cheng. 2012. Microstereolithography of Three-Dimensional Polymeric Springs for Vibration Energy Harvesting. Smart Materials Research،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-495087
Modern Language Association (MLA)
Baker, Evan…[et al.]. Microstereolithography of Three-Dimensional Polymeric Springs for Vibration Energy Harvesting. Smart Materials Research No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-495087
American Medical Association (AMA)
Baker, Evan& Reissman, Timothy& Zhou, Fan& Wang, Chen& Lynch, Kevin& Sun, Cheng. Microstereolithography of Three-Dimensional Polymeric Springs for Vibration Energy Harvesting. Smart Materials Research. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-495087
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-495087