Protective electrode for a piezoceramic sensor
AssigneeCeramTec GmbH
InventorHans-Jürgen SCHREINER
Life of this patent
Estimating the term…
Abstract
The invention relates to a piezoceramic sensor in a housing having a layer (3), preferably a PZT layer, made of a piezoelectric material, on both sides of which there is a respective sensor electrode (2), both sensor electrodes (2) being connected in each case to a pole (5, 6). In order that no potential difference, which would allow for the charge to be dissipated by way of the surface, is formed between the housing and the sensor electrodes (2), it is proposed according to the invention that the layer (3) protrudes beyond the sensor electrode (2) on at least one side of the layer (3), and a protective electrode (1) which encompasses the sensor electrode (2) at an insulating distance (7) is arranged on that part of the layer (3) which protrudes beyond the sensor electrode (2).
Claims11
A piezoceramic sensor in a housing having a layer, preferably a PZT layer, made from a piezoelectric material, on both sides of which is located a sensor electrode, and both sensor electrodes are in each case connected to a pole, characterized in that the layer protrudes beyond the sensor electrode on at least one side of the layer, and a protective electrode which encompasses the sensor electrode at an insulating distance is arranged on the part of the layer which protrudes beyond the sensor electrode.
Dependencies are inferred from the claim text.