Patent · US Active

Piezoelectric film having electrical filter for selectively detecting vibrations in components

US11150128B2 · kind B2 · utility

0Cited by

5References

19Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Joachim Hering · Gammertingen, DE
Hans-Willi Kessler · Eschweiler, DE
Martin Kram · Gerolzhofen, DE

Key dates

Filing date	Dec 18, 2017
Grant date	Oct 19, 2021
Priority date	—
Expiry date	Jun 20, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG01H1/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A detector arrangement, for selective detection of vibrations on a component, comprises a film fitted with at least one piezoelectric element. The film is attached to the component in such a way that occurring mechanical vibrations act on the piezoelectric element, such that an electrical charge with a frequency correlating with the mechanical vibration is generated at the connection electrodes of the piezoelectric element. An electrical filter is connected to the piezoelectric element and filters out the component of the supplied charge which corresponds to a predefined frequency. An electrical charge storage means which is connected to the filter is used to accumulate the filtered-out charge components. A signaling means is also provided, which generates an electrical signal as soon as a predetermined charge limit value is reached on the charge storage means.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.