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Proceedings Article

On energy harvesting module for scalable cognitive autonomous nondestructive sensing network (SCANSn) system for bridge health monitoring

[+] Author Affiliations
John Turner, Justin Cartwright, Dong Sam Ha

Virginia Polytechnic Institute and State Univ. (USA)

David Zhang, Sourav Banerjee

Acellent Technologies, Inc. (USA)

Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79831T (April 19, 2011); doi:10.1117/12.880286
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From Conference Volume 7983

  • Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011
  • San Diego, California, USA | March 06, 2011

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.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

John Turner ; Justin Cartwright ; Dong Sam Ha ; David Zhang and Sourav Banerjee
"On energy harvesting module for scalable cognitive autonomous nondestructive sensing network (SCANSn) system for bridge health monitoring", Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79831T (April 19, 2011); doi:10.1117/12.880286; http://dx.doi.org/10.1117/12.880286


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