Research On The Preparation And Electrical Output Of Piezoelectric-embedded Asphalt Concrete

The world has numerous populations, with the development of economy, energy sources has been a fundamental demand. The improvement of living standards and the development of economy cannot without the lack of energy sources. But, nowadays the shortage of energy has been the world development bottleneck, it’s high time that seeking for new energy. Though the piezoelectric material collecting the vibration energy around the environmental and translate it into workable electric energy. In recent years the principle is the study hot pints in the new energy sources because its’ simple, non-pollution, the high energy conversion efficiency. However, at present, the study about piezoelectric energy collection focuses on the power supply for the MEMS (micro electro mechanical system). The study which is in relation to use piezoelectric materials to generate power cannot be common, it also nearly blank in domestic. Hence, this paper concentrates on the preparation of embedded piezoelectric asphalt concrete and electricity output which is under the road engineering background.First, use ANSYS12.0software optimized the piezoelectric element size. After simulation analyzes, the piezoelectric element that external diameter is18mm, inner diameter is10mm, thickness is4mm will produces63.146V voltage under the0.7MPa of Instant compressive stress. Though the traditional oxide solid-phase reaction, produce PMnS-PZN-PZT piezoelectric element which mixed0.45wt%Fe2O3and it has a good piezoelectric performance and endurance quality.Second, by means of marshall design method, take Superpave Volume preparation design method as an example, we can design the volume performance of AC-10mixture asphalt, high temperature stability, water stability, and both of them can satisfy our Asphalt mixture technical specifications. It has good pavement performance and it also has good compatibility with piezoelectric element.Third, we build a force coupling model electricity of embedded piezoelectric asphalt concrete based on piezoelectric equation and deduce an open-circuit voltage equation of embedded piezoelectric asphalt concrete. By use of Bisar3.0software, analyses the vertical pressure stress of embedded piezoelectric asphalt concrete, and the open-circuit voltage calculated value of embedded piezoelectric asphalt concrete is basically coincide with actual measurement data.Fourth, the open-circuit peak voltage of piezoelectric element will increasing by pressure stress, the peak voltage element that monolithic large thickness is higher and increased tendency is faster. However, impose a lower frequency will has a small effect on voltage output of piezoelectric element. The open-circuit voltage of embedded piezoelectric asphalt concrete will reduce by the increasing lay buried depth, it will increased by the total thickness of piezoelectric element and wheel load added. The open-circuit current will increase by the parallel number of piezoelectric element.Fifth, the electrical energy acquisition effect and efficiency of LTC3588-1chip is superior to the acquisition circuit of bridge rectifier+MAX666type DC-DC unit. In addition, super capacitor is more suitable for the energy storing device of embedded piezoelectric asphalt concrete.The result of this paper shows that the embedded piezoelectric asphalt concrete has a good pavement performance, but its’electricity output can only be used for the power electronic devices such as wireless sensors.