Piezoelectric Energy Harvesting from Pavement Vibration

To pave a new way for green energy,this paper proposes the piezoelectric energy harvesting from pavement vibration.Based on the researches at home and abroad,the main performances of piezoelectric energy harvesting unit from pavement vibration are innovatively put forward,guiding the design of the unit. A mathematic model is introduced according to the piezoelectric theory.With the software of ANSYS,the buried depth and arrayed space of the arrayed unit are analyzed to optimize the structural parameters in light of higher harvesting energy and better coupling properties.From the simulation result,a unit of 280 mm x 280 mm with 4mm arrayed space and 30 mm PZT diameter can be obtained.When it is buried under the 40 mm asphalt pavement,1.785 MW electric power can be harvested on each traffic lane and per kilometer.This shows that the application of the piezoelectric energy harvesting from pavement vibration has good prospects.