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Robust Position Measurement Systems Based on Integrated 3-D Magnetic Field Sensors


Today’s position measurement systems are restricted to systems based on
lateral Hall sensors and, hence, suffer from low robustness concerning temperature
dependency and disturbing external magnetic fields. With the application of 3-D
Hall sensors new principles in signal conditioning can be applied. Position values
are then calculated from the complete flux vector and not only from a single component
of the magnetic field. Thus it is possible either to perform multi axis position
measurement or to use gradient approaches to come to more robust systems. The
drawback of these approaches is that the complexity of system design increases. So
it is necessary to set up new developmentmethodologies for such multidimensional
systems. In this article an approach to design such robust multidimensional position
sensors systems is proposed.