Abstract

A circular piezoelectric pavement energy acquisition device for road was designed by using the stack mechanism on a piezoelectric ceramic unit. Two different orientations of piezoelectric transducers were compared according to the pavement construction mode, and their conversion performance was evaluated based on the traffic load model. The performance of the transducer was analysed from two aspects, electromechanical conversion effect and structural durability, and its working efficiency was determined. Under a force of 5000 N and loading frequency of 10 Hz, the effective current of the “9-units” transducer was 3 mA, maximum output power was 18.566 mW, and corresponding optimal load was 7 kΩ. The cyclic loading and performance testing of laminated piezoelectric ceramic units demonstrated a voltage between 8 and 12 V under 5000 N and 10 Hz, and the voltage decreased by approximately 2.8% and 9% at loading cycles of 30,000 and 60,000, respectively. The static capacitance remained at approximately 1.1 µF. In addition, among the rubber pads of different materials used as protection for the piezoelectric device, fluorine rubber pad was found to be the most suitable. Compared with the traditional PZT devices, the piezoelectric devices designed for this study show better pavement power generation performance, fatigue resistance, and practical feasibility.

摘要

利用压电陶瓷单元上的叠层机构设计了一种圆形的压电路面能量采集装置。根据路面构造模式比较了两种不同方向的压电换能器，并根据交通负荷模型评估了它们的转换性能。从机电转换效果和结构耐久性两个方面分析了换能器的性能，确定了其工作效率。在5000 N的力和10 Hz的负载频率下，“ 9个单元”传感器的有效电流为3 mA，最大输出功率为18.566 mW，相应的最佳负载为7kΩ。叠层压电陶瓷单元的循环负载和性能测试表明，在5000 N和10 Hz下，电压在8至12 V之间，负载周期为30,000和60,000时，电压分别下降了约2.8％和9％。静态电容保持在约1.1 µF。另外，在用作压电器件保护的不同材料的橡胶垫中，发现氟橡胶垫是最合适的。与传统的PZT装置相比，本研究设计的压电装置具有更好的路面发电性能，抗疲劳性和实际可行性。