| 摘要 |
A free electricity generator is provided to generate electricity as a plastic plate presses a piezoelectric element in case the plastic plate which is installed at a central reservation and a tunnel wall is pressed due to pneumatic pressure generated in driving a car. A steel support is fixed to a central reservation and a tunnel without damage to a main body and a free electricity generator is mounted. A driving car presses a plastic plate having 2m width at 5mm. 18 of pressure elements are operated by the pushing force. A part is pushed as 5mm due to air when the car passes. A piezoelectric element is pushed and a piezoelectric element is operated and current flows through a metal line. The plastic plate is restored at the original position with a spring at the moment when the car passes. |
