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Field Concentrator Based Resonant Magnetic Sensor
Simon Brugger
Graduiertenkolleg “Embedded Microsystems”, Universität Freiburg
This talk reports a novel resonant magnetic sensor based on the combination of a mechanical resonator and a magnetic field concentrator with two gaps. In contrast to previous Lorentz force based resonant magnetic sensors, a high sensitivity is achieved without modulated driving current and complex feedback electronics. Furthermore, compared to magnetic moment based resonant magnetic sensors, the new concept requires no permanent magnet. A macroscopic proof of concept results in a high sensitivity of 140 kHz/T at a magnetic flux density of 1.5 mT.
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