Self-Sustaining Multi-Sensing and Wireless Communication System Powered by Efficient Energy Harvesting From Road Traffic and Heat

Dipon, Wasim Hafiz
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The primary focus of this research is on designing, developing, and implementing a self-sustainable low-power remote multi-sensing system. The system can operate at full functionality powered by both cyclic and non-cyclic alternative energy sources. The alternative energy sources used in the research are the energy harvested from road traffic and thermal energy of the heat gradient with the road surface. A custom-designed stacked lead zirconate titanate Pb(Zr, Ti)O3 (PZT) transducer is used to harvest energy from the mechanical vibration of the vehicles passing over the road. A group of Thermoelectric Generators (TEG) are used to harvest thermal energy from the road surface. Long-range wide area network communication is established to send sensory data to a remote server which is set up for user -friendly representation of sensory data. The methodologies used in this research include the conversion of energy from PZT and TEG into usable electrical power and efficient utilization of the power in sensing and wireless communication. The combined power sources for the system present innovative yet challenging technical concepts to be deployed for the system to operate. The methodologies followed in the research span from a selection of adaptable AC-DC and DC-DC converters working simultaneously. The AC-DC converter was required for converting the AC signal generated from the PZT and the DC-DC converter was used to boost the voltage level of the signal from the TEG. SPICE modeling and simulation were conducted to evaluate the performances of various converters. User-level software programs were implemented for automated power management on both sensory hardware and wireless communication. Wireless communication via Long Range Wide Area Network (LoRA WAN) was used to transfer sensory data to a remote user interface. Setting up the server for remote user-friendly access to sensory data was successfully tested. Primary experimental results yielded good functionality and data accuracy from the sensors.

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Energy conversion, Energy harvesting, LoRA WAN Communication, PZT, Remote sensing, TEG, LoRA WAN
Electrical and Computer Engineering