Feasibility Study On Piezoelectric Power Generation Technology Applied In Pavement

With the development of the society, our demand for reliable uninterrupted power energyis increasing, and people’s environmental awareness is also growing. Development of clean,environmentally friendly, reliable, and low-cost energy has become a new central issue in theworld today. The mechanical energy is a new type of environmentally friendly energy. On thebasis of basic principle of the piezoelectric effect of the piezoelectric material, the thesis madeuse of mechanical energy in the load to develop a new kind of piezoelectric power generationtechnology which is suitable for the road, and made systematical studies on the issue.Firstly this thesis made thorough theoretical analysis of piezoelectric materials andpiezoelectric oscillator. On the basis of this, the thesis selected PZT-5H as the mainpiezoelectric material. With the consideration of low-frequency forced vibrationcharacteristics of road-load, this thesis selected wafer stack-type piezoelectric vibrator whichis simply supported as a core member of piezoelectric power generating device, and madepiezoelectric transducer. Secondly, this thesis made a preliminary research on the generatingcapacity of the piezoelectric device with the method of theoretical calculations ansys andindoor loading test. On the condition of standard axle load with the frequency of10Hz, thegenerating performance of the piezoelectric transducer located in the layer between the toplayer and the surface layer reaches its best, and the output voltage is223.33V, current is3.03μA. The indoor test results showed that with the external force increases, the voltagevalue of the piezoelectric transducer also increases, the maximum voltage peak is65.2V, and0.23mJ of energy produced under a test wheel rolling.1.5degrees of power one day can beproduced to meet the demand of signal indicator if suitable paved program selected.The subject of studies have shown that the piezoelectric power generation as aenvironmental friendly technologies which transforms the mechanical energy on the road intoelectrical energy is practicable, and has broad application prospects following the theme ofemission reduction, energy saving and environmental protection.