New Orleans, Louisiana
June 26, 2016
June 26, 2016
August 28, 2016
Electrical and Computer
In recent years, there has been an upsurge of research interest in radio frequency (RF) energy harvesting/scavenging techniques, which is the capability of converting the received RF signals into electricity. Electromagnetic energy harvesting holds a promising future for energizing low power electronic devices in wireless communication circuits.
In this paper, we present the design and implementation of a capstone project on an environmental monitoring wireless sensor network, where the nodes are solely powered by harvested RF energy, allowing the use of such monitoring systems in areas where replacement of batteries are costly or not feasible.
The designed system includes several sensor nodes and a base station. The sensor nodes comprise of a P2110 power harvester, an MSP430 micro-controller, pressure and temperature sensors and a transmitter. The power harvester was used to power the micro-controller through RF energy. The micro-controller was attached to pressure and temperature sensors for environmental monitoring and also to a transmitter. The sensor nodes are solely powered by harvested RF energy. The data is transmitted to a base station, which forwards it to a monitoring station, where data is stored in a MySQL database. The system was successfully developed and tested, providing reliable and accurate data.
The paper will provide details of design specifications, technical constraints, project implementation, lessons learned and the valuable experience it provided to the students. The project will be incorporated as a design case in a new wireless sensors networks course that will be offered in the future.
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