Measurement transducer for simultaneously measuring a force that can be both dynamic and static
AssigneeKistler Holding AG
InventorsClaudio Cavalloni, Kim Pfluger
Life of this patent
Estimating the term…
Abstract
A measurement transducer for simultaneously measuring a force that can be both dynamic and static includes at least one piezoelectric transducer element having element surfaces on which the force generates electrical polarization charges proportional to a magnitude of the force. The measurement transducer includes a resonator element which can be excited to at least one resonance frequency and undergoes a transverse expansion from the action of the force in a transverse direction to the force. The magnitude of the transverse expansion is proportional to the magnitude of the force and causes in the resonance frequency a change that is a function of the force.
Claims17
A measurement transducer for simultaneously measuring a force that can be both dynamic and static and that acts in a first direction, the measurement transducer comprising:
- a piezoelectric transducer element defining element surfaces that are configured to generate electrical polarization charges being proportional to a magnitude of the force acting in the first direction;
- a resonator element configured to be excited to at least one resonance frequency;
- wherein the resonator element is further configured so that in response to the force acting in the first direction the resonator element undergoes a transverse expansion that changes the resonance frequency of the resonator element as a function of the force acting in the first direction;
- wherein the transverse expansion proceeds in a transverse direction that forms a non-zero angle relative to the first direction;
- and
- wherein the transverse expansion has a magnitude that is proportional to the magnitude of the force acting in the first direction.
Dependencies are inferred from the claim text.