Piecewise piezoelectric energy harvester
US9711711B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Feb 2, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A piezoelectric energy harvester device has a cantilevered structure with a rectangular proof mass portion defined by holes through a substrate along three sides of a proof mass portion and supported by a thinned hinge portion for free pivotal movement relative to an anchor portion. Elongated strips of piezoelectric energy harvesting units are formed in side-by-side spaced positions on the hinge portion and aligned parallel or perpendicular to a stress direction. Multiplexing electronics coupled to contact pads on the anchor portion selectively connects different strip combinations to power management circuitry, responsive to variations in vibration magnitude or modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.