Piezoelectric helmholtz resonator for energy conversion专利检索-压电谐振器电子零件及设备专利检索查询-专利查询网

Piezoelectric helmholtz resonator for energy conversion

阅读：354发布：2023-03-25

专利汇可以提供Piezoelectric helmholtz resonator for energy conversion专利检索，专利查询，专利分析的服务。并且A Helmholtz resonator comprising an orifice and an otherwise enclosed volume includes one or more cascaded hollow piezoelectric cylinders. The resonator effects a conversion between an air flow and electrical energy, one energy form being applied as an input to excite the resonator and the other energy form being directly derivable as an output.，下面是Piezoelectric helmholtz resonator for energy conversion专利的具体信息内容。

权利要求

1. A Helmholtz resonator for converting between kinetic fluid energy and electrical energy, comprising first and second resonator end means and a Helmholtz resonator cavity therebetween, a hollow piezoelectric element disposed between said resonator end means and defining the side enclosure of said resonator cavity, first and second electrode means located respectively on the outer and inner surfaces of said hollow piezoelectric element, conductors connected to said electrodes, said first end means having an orifice therein, said second end means defining a cavity closure, and means for directing a fluid flow across said orifice, such that fluid flow across said orifice induces oscillations within the resonator cavity to induce periodic stress variations in the piezoelectric element and a voltage across said electrodes.

2. A combination as in claim 1 for arming an artillery projectile, further comprising an aperture located on the surface of said projectile such that a portion of the air flow past said aperture flows across said orifice, and circuitry connected to said conductors, said circuitry being activated when a voltage is induced across said conductors.

3. A combination as in claim 1, further comprising resilient insulating means spacing said piezoelectric element from said first and second end means.

4. A combination as in claim 1, wherein the orifice in said first end means has a cross-sectional area constricted from the cross-sectional area of said hollow piezoelectric element.

5. A combination as in claim 1 further comprising an electrical load connected to said conductors.

6. A combination as in claim 5 further comprising a rectifier and a low pass filter connected between one of said conductors and said load.

7. A combination as in claim 1 further comprising an inductance connected to one of said conductors.

8. A combination as in claim 7 wherein said resonator comprises a capacitive reactance at a natural resonance frequency, and wherein said inductance exhibits a substantially like absolute magnitude reactance at said frequency.

9. A combination as in claim 1 wherein said piezoelectric member comprises a plurality of hollow piezoelectric segments adhered together.

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