Sensor system having a magnetoelastic deformation element

Abstract

A sensor system is provided having an at least partially magnetoelastic deformation element for measuring pressures, caused by a fluid, that are able to be applied to the magnetoelastic deformation element, having a magnetic circuit formed via a magnetic flux feedback and having a sensor unit and an evaluation unit. The sensor unit is positioned at the deformation element and the evaluation unit having an evaluation coil is structurally separated from, yet inductively coupled to the sensor unit. The sensor unit has a sensor coil positioned on the deformation element and the evaluation unit has the evaluation coil that is inductively coupled to the sensor coil, 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 or weak inductive coupling by a magnetic circuit enclosing the two coils. Alternatively, the sensor unit and the evaluation unit may be coupled via a magnetic circuit having a flux feedback, and the evaluation coil may be wound around the fixed or mountable flux feedback, a permeability change effected by the application of pressure to the deformation element, and thus a change in the inductance of the evaluation coil being able to be determined.

Dependencies are inferred from the claim text.