Sensor system having a magnetoelastic deformation element

A sensor system comprising:

• an at least partially magnetoelastic deformation element for measuring pressures, caused by a fluid, that are applied to the magnetoelastic deformation element;
• a magnetic circuit formed via a magnetic flux feedback;
• a sensor unit situated at the deformation element;
• and
• an evaluation unit having an evaluation coil and being structurally separated from, yet inductively coupled to, the sensor unit;
• wherein the sensor unit has a sensor coil situated on the deformation element and the evaluation unit has the evaluation coil that is inductively coupled to the sensor coil;
• wherein the sensor coil forms a resonant circuit, using its own parasitic capacitance or using an additional capacitance, which is able to be energized by the evaluation coil in free resonance with strong inductive coupling by the magnetic circuit enclosing the sensor coil and the evaluation coil, a resonant frequency being then able to be determined in the evaluation unit.

A sensor system comprising:

• an at least partially magnetoelastic deformation element for measuring pressures, caused by a fluid, that are applied to the magnetoelastic deformation element;
• a magnetic circuit formed via a magnetic flux feedback;
• a sensor unit situated at the deformation element;
• and
• an evaluation unit having an evaluation coil and being structurally separated from, yet inductively coupled to, the sensor unit;
• wherein the sensor unit has a sensor coil situated on the deformation element and the evaluation unit has the evaluation coil that is inductively coupled to the sensor coil;
• wherein the sensor coil forms a resonant circuit, using its own parasitic capacitance or using an additional capacitance, which is able to be energized by the evaluation coil in free resonance with inductive coupling by the magnetic circuit enclosing only the sensor coil, which is weakly coupled to the evaluation coil via an air gap, a resonant frequency being determinable in the evaluation unit.

A sensor system comprising:

• an at least partially magnetoelastic deformation element for measuring pressures, caused by a fluid, that are applied to the magnetoelastic deformation element;
• a magnetic circuit formed via a magnetic flux feedback;
• a sensor unit situated at the deformation element;
• and
• an evaluation unit having an evaluation coil and being structurally separated from, yet inductively coupled to, the sensor unit;
• wherein the sensor unit and the evaluation unit are coupled via the magnetic circuit having the flux feedback, the evaluation coil being wound around the flux feedback, a permeability change effected by an application of pressure to the deformation element, and thus a change in an inductance of the evaluation coil being able to be determined.