Piezoelectric pressure sensor containing pre-stressed measuring elements
AssigneePiezocryst Advanced Sensories GmbH
InventorAlexander Friedl
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Abstract
The invention relates to a piezoelectric pressure sensor comprising piezoelectric measuring elements located in a housing, which are pre-stressed between the housing base and a membrane provided at the pressured side of the housing. According to the invention the piezoelectric measuring elements are placed on the outside of a pre-stressing element, which is located essentially along the longitudinal axis of the sensor.
Claims8
A piezoelectric pressure sensor which comprises a housing that defines a base therein and a longitudinal axis therethrough, a membrane located at a pressured side of the housing, a pre-stressing element which extends along said longitudinal axis, and a plurality of piezoelectric measuring elements located in the housing, to be pre-stressed between the membrane and the housing base, the piezoelectric measuring elements being positioned radially around the pre-stressing element, the pre-stressing element extending beyond opposite ends of the piezoelectric measuring elements.
Dependencies are inferred from the claim text.