Piezoelectric measuring element with transverse effect and sensor comprising such a measuring element
AssigneeKistler Holding AG
InventorsUlrich Staiger, Paul Engeler, Claudio Cavalloni
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Abstract
A piezoelectric measuring element comprises at least one bar with transverse effect which can be used with two conductor technology. Poles comprising the metallizations, electrodes and lines in the measuring element are embodied with one or more piezoelectric bars with transverse effect such that the electric capacitances thereof with respect to the housing are identical. There can be a completely symmetrical design of the poles. A capacitor from one pole to the housing can correspond to the difference in capacitance of both poles to the environment.
Claims18
A measuring element comprising one or more piezoelectric bars with transverse effect, each bar having two force-introducing surfaces and two charge-collecting surfaces, each bar being disposed in a housing comprising two poles insulated from each other wherein each pole comprises a contact site for the connection to a two conductor measurement signal line as well as an electrode electrically connected thereto and one or more metallisations electrically connected thereto on the charge-collecting surfaces of the bars wherein the electric capacitances as defined between each pole and the housing, which is electrically insulated therefrom by material properties and geometric conditions, are identical.
Dependencies are inferred from the claim text.