228. ULTRA LOW-POWER SENSOR NODE FOR SHM NETWORKS

Department: Structural Engineering
Faculty Advisor(s): Michael Todd
Award(s): Honorable Mention

Primary Student
Name: Scott Anthony Ouellette
Email: souellet@ucsd.edu
Phone: 858-534-6560
Grad Year: 2014

Abstract
Sensing systems play a lead role in the structural health monitoring (SHM) paradigm by performing actuation, data acquisition, and communication in order to enable the implementation of a health monitoring strategy. In many applications power provision is limited by the use of a battery as their power capacity often fails to exceed the intended long-term sensing requirements of the host structure. Novel energy harvesting schemes have emerged as a potential powering solutions to provide autonomous functionality to sensing systems. Galvanic corrosion as a form of energy harvesting has proved to be a potential source for operating simple low-power sensing and computing platforms for marine structures. However, as with many energy harvesting technologies, the characteristics of the power supply define a unique design problem for the sensor node electronics. This initiative considers the design of a sensor node that exploits the functionality of high-efficiency discrete switching converters and low-power microprocessors to reduce the power demands on the energy harvester. In addition, the sensor node features a low duty-cycle control circuit in concert with a super-capacitor to isolate the energy harvester from the power electronics for more efficient operation.

Related Links:

  1. http://shm.ucsd.edu/Site/Research_Activities/Projects/Energy_Harvesting.html

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