Because of the instantaneity and discontinuity of traffic load, the instantaneous output indices, such as output power and output voltage, can not reflect the energy output of piezoelectric materials under cumulative traffic loads. In order to further explore the energy output of piezoelectric materials in road environment, the electromechanical coupling model of cylindrical piezoelectric materials is deduced on the basis of simplifying traffic load, and the influence of traffic load conditions on its energy output is analyzed by numerical calculation. Finally, based on the daily traffic volume of a highway, the cumulative daily energy output of a cylindrical piezoelectric material which is made for a piezoelectric transducer is estimated. The electromechanical coupling model shows that the energy output increases gradually with the increase of vehicle load, and increases first and then decreases with the increase of vehicle speed. The results of energy estimation under daily traffic volume show that the total energy output of a single piezoelectric material in the piezoelectric transducer reaches 950 J.

CICTP