A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Developing and Modeling a Piezoelectric Energy Harvester (PEH) for Highway Pavements
This paper describes a piezoelectric energy harvester (PEH) that uses PZT or lead zirconate titanate (Pb[Zr(x)Ti(1 − x)]O3) elements to convert mechanical energy from moving vehicles to electricity. The PEH consists of a rectangular metal housing supported by four PZT stacks located at its corners. It is sized to capture the right wheel path of the weaving traffic. Each PZT stack consists of six PZT cylindrical elements connected in parallel. Extensive laboratory tests were performed to properly characterize and model the stacks. An electromechanical model of the stacks was developed to translate its mechanical properties to electrical properties. This model was implemented into Matlab/Simulink in order to optimize the power harvesting circuitry. The output power depends on the applied stress and the loading frequency. The power output of one of the PZT stacks is in the order of 10 mW and 1.4 W for a car axle and a truck axle, respectively. In addition to generating power, the PZT stacks can be used as axle load sensors by utilizing the output voltage to back calculate the stress using the developed model.
Developing and Modeling a Piezoelectric Energy Harvester (PEH) for Highway Pavements
This paper describes a piezoelectric energy harvester (PEH) that uses PZT or lead zirconate titanate (Pb[Zr(x)Ti(1 − x)]O3) elements to convert mechanical energy from moving vehicles to electricity. The PEH consists of a rectangular metal housing supported by four PZT stacks located at its corners. It is sized to capture the right wheel path of the weaving traffic. Each PZT stack consists of six PZT cylindrical elements connected in parallel. Extensive laboratory tests were performed to properly characterize and model the stacks. An electromechanical model of the stacks was developed to translate its mechanical properties to electrical properties. This model was implemented into Matlab/Simulink in order to optimize the power harvesting circuitry. The output power depends on the applied stress and the loading frequency. The power output of one of the PZT stacks is in the order of 10 mW and 1.4 W for a car axle and a truck axle, respectively. In addition to generating power, the PZT stacks can be used as axle load sensors by utilizing the output voltage to back calculate the stress using the developed model.
Developing and Modeling a Piezoelectric Energy Harvester (PEH) for Highway Pavements
Lecture Notes in Civil Engineering
Raab, Christiane (editor) / Khalili, Mohamadreza (author) / Ahmed, Sara (author) / Papagiannakis, A. T. (author)
2020-06-20
10 pages
Article/Chapter (Book)
Electronic Resource
English
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