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New and future applications of fluxgate sensors

: Grüger, H.; Grüger, A.; Kaluza, F.


Hristoforou, E.:
4th European Magnetic Sensors and Actuators Conference 2002. Proceedings : Athens, Greece, 3 July - 5 July 2002
Amsterdam: Elsevier, 2003 (Sensors and actuators. A, Physical 106.2003, Nr.1/3)
ISSN: 0924-4247
European Conference on Magnetic Sensors and Actuators (EMSA) <4, 2002, Athen>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer IPMS ()
Fluxgate-Sensor; object detection; traffic detection; Navigation; non-destructive testing

Integrated fluxgate sensors offer a wide range of new and future applications due to their favorable properties in combination with a reasonable price. The high sensitivity of 30 mV/ T in combination with operation from a single 5 V source and analogue output signals for ±65 T is suitable for measurements of weak magnetic fields, for example the earth field of approximately 45 T. Due to low drifts, below 500 ppm/K are guaranteed, below 100 ppm/K can be achieved on selected sensors, temperature compensation can often be avoided.
For already existing applications, new aspects and possibilities arise. This is evaluated and discussed together with some completely new applications. For some future applications the background is analyzed and the requirements for the system development are described.
Next to navigation as one of the oldest applications, detection of ferrous objects, position measurement through generated fields and non-destructive testing becomes more and more important.