MODULAR PIEZOELECTRIC GENERATORS

摘要

A modular piezoelectric generator for converting mechanical energy from passing vehicles to electrical energy may be imbedded below a road's upper asphalt layer. Placing several generators enables large areas cover. Load spreading layers (122a, 122b), optionally used as electrodes for the piezoelectric elements, evenly spreads stress among the piezoelectric elements (110). Optional upper and lower layers made of material such as bitumen, enabling good integration with road structures. Optional heating elements in upper layer are powered by piezoelectric elements located in the central matrix layer. Energy harvested may be used for: lighting, advertising, battery charging, deicing or connecting to electric grid. Modular apparatus may be used where mechanical energy is available; for example: imbedded below road's upper asphalt layer to harvest energy from passing vehicles; used in airport's runway; in railroad or pavements. The apparatus may be used outdoors or indoor at any location where large number of pedestrians passing.