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Proceedings Paper

On energy harvesting module for scalable cognitive autonomous nondestructive sensing network (SCANSn) system for bridge health monitoring
Author(s): John Turner; Justin Cartwright; Dong Sam Ha; David Zhang; Sourav Banerjee
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Paper Abstract

The SCANSn is a structural health monitoring (SHM) system is being developed by Acellent Technologies to monitor steel bridges. The required voltage of the system is 14.4 V for active scanning, and the power consumption is approximately 8 W. The investigated energy harvesting from both solar and thermal sources to recharge the lithium-ion battery of the system. A solar panel and a Thermal Electric Generator (TEG) are used to harvest ambient energy. The thermoelectric device is placed in a Fresnel dome to maximize the temperature gradient of the TEG. During shading of the solar panel, the TEG continues to supply power to the battery charger. Since the output voltages and currents of the solar and thermal energy harvesters vary significantly, the energy harvesting module is constructed by two buck-boost converters operating in parallel. Maximal Power Point Tracking (MPPT) is employed for the buck-boost converter for the solar panel, while a fixed duty cycle converter is used for the TEG due to substantially lower power compared with the solar panel. The system design and measured results of a prototype system are presented. Our prototype system successfully demonstrates that the SCANSn system can be powered by the energy harvested from solar and thermal.

Paper Details

Date Published: 19 April 2011
PDF: 11 pages
Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79831T (19 April 2011); doi: 10.1117/12.880286
Show Author Affiliations
John Turner, Virginia Polytechnic Institute and State Univ. (United States)
Justin Cartwright, Virginia Polytechnic Institute and State Univ. (United States)
Dong Sam Ha, Virginia Polytechnic Institute and State Univ. (United States)
David Zhang, Acellent Technologies, Inc. (United States)
Sourav Banerjee, Acellent Technologies, Inc. (United States)


Published in SPIE Proceedings Vol. 7983:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011
H. Felix Wu, Editor(s)

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