PIEZOELECTRIC TRANSDUCER FOR AN ENERGY-HARVESTING SYSTEM

摘要

A piezoelectric transducer for energy-harvesting systems includes a substrate, a piezoelectric cantilever element, a first magnetic element, and a second magnetic element, mobile with respect to the first magnetic element. The first magnetic element is coupled to the piezoelectric cantilever element. The first magnetic element and the second magnetic element are set in such a way that, in response to relative movements between the first magnetic element and the second magnetic element through an interval of relative positions, the first magnetic element and the second magnetic element approach one another without coming into direct contact, and the interaction between the first magnetic element and the second magnetic element determines application of a force pulse on the piezoelectric cantilever element.

主权项

1. A piezoelectric transducer for an energy harvesting system, comprising:
a semiconductor substrate; a cantilever piezoelectric element; and a first magnetic element coupled to the cantilever piezoelectric element; a second magnetic element coupled to the substrate, the first and second magnetic elements being movable with respect to each other, the first magnetic element and the second magnetic element being configured to generate a force pulse on the cantilever piezoelectric element by mutual magnetic interaction in response to relative movements between the first magnetic element and the second magnetic element through an interval of relative positions, the first magnetic element and the second magnetic element being configured to approach each other without mutual direct contact.