Patent · US Active

Capacitive ultrasonic transducer

US9816854B2 · kind B2 · utility

2Cited by

5References

15Claims

0Family size

Assignee

AVL LIST GMBH · AT

Inventors

Katarzyna Kudlaty · St. Pölten, AT
Michael Wiesinger · Graz, AT
Michael Cernusca · Judendorf, AT

Key dates

Filing date	Jun 19, 2012
Grant date	Nov 14, 2017
Priority date	—
Expiry date	Feb 7, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/021
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A capacitive ultrasonic transducer includes a sensor head having a back plate, the structured front side of which is provided with an insulation layer, and the back side of which is provided with an electrode. In order to achieve an improved construction by means of which increased temperature resistance up to several hundred degrees Celsius can be achieved even in strongly oxidizing and reducing media, the membrane provided as a sound generator is subjected to tensile stress in a planar direction.

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