Piezoelectric sensor for e.g. determining impulses of individual drops impinging on measuring surface, has crystal converting impulse of drop into electrical signal, where amplitude of signal is expression of impulses of drops

摘要

The sensor has a piezoelectric crystal for converting impulse of drop through compression into an electrical signal, where amplitude of the signal is an expression of the impulses of drops and piezoelectric units made of piezoelectric crystal. A cover plate protrudes over a base plate, where a measuring surface is grounded off through a tension spring to the base plate. The measuring surface exhibits the cover plate to overlie on the piezoelectric units. An independent claim is also included for a cover plate for use in sensor.