Research And Applicance Of Piezoelectric Energy Harvesting On Pavement

Roads as the national important infrastructure,bear the important functions such as personnel,transport of goods,it is in use process,to take millions of to ten million vehicles a year rolling,the vibrational energy is very considerable.Piezoelectric technology USES the electromechanical coupling characteristics of the piezoelectric material,the mechanical vibration energy into electrical energy directly,for the road vibration energy harvesting.Piezoelectric technology in this paper,the research situation at home and abroad research,the research on the road with the structure and performance of piezoelectric transducer,the design applies to the road of transducer encapsulation boxes,and on the way of a complete set of the piezoelectricity can exchange equipment energy collection testing.The experimental and application results show that the technology can be used in pavement engineering.The main content of the article include:(1)to study the three forms of the working principle and characteristics of piezoelectric materials,and compressive strength test of piezoelectric materials,the piezoelectric ceramic compressive strength of 197 mpa,far more than the road vehicle;The capacity test,under 1 kn,10 hz load,the highest voltage to 70 v.Design the stack type piezoelectric transducer element processing technology,the fatigue test,after 5 100000 kn load,the depolarization is only 2.95%.And made to match road packaging box of the piezoelectric element.On different piezoelectric cantil ever beam type piezoelectric transducer installation location was tested,near the fixed end on a cantilever beam installed piezoelectric ceramic power efficiency is higher.And analyzes the different forms of piezoelectric transducer structure applicable scope.(2)to design piezoelectric transducer encapsulation boxes,from material selection,structure design,installation,integration of three aspects,described the piezoelectric element and packaging boxes work principle and the concrete realization way,and made applicable engineering samples.The shaking table experiment on piezoelectric transducer encapsulation boxes under 5 ~ 25 hz frequency,all can light 36 success LED headlamp unit.(3)test the piezoelectric can change two kinds of packaging box construction embedding way: embedded in the process of road construction,and on the way of forming buried,comparing the merits of the two kinds of buried way,through the analysis of the forming path is embedding the better solution,rubber asphalt fi lling glue has the advantages of high strength,short construction time,is a good filling and sewing materials.The road vehicle rolling test,the vehicles in the past piezoelectric packaging box,at least can make 36 LED headlamp unit a shiny,suggests that piezoelectric transducer encapsulation boxes used on actual road is feasible.