Design of multi-dimensional magnetic position sensor systems based on HallinOne^® technology

Abstract

Systems for measurement of relative displacements or rotations in a single dimension by means of Hall sensors are state of the art. Fraunhofer HallinOne ® Technology delivers 3D Hall sensors which can measure the complete spatial magnetic field vector as well as its change in all spatial directions at once. This allows in principle the design of position sensor systems which can detect all six degrees of freedom (positions and angles) of any device with a single magnet and a single magnetic field sensor. Unfortunately, complexity of the design increases significantly with the number of DOF in question. In this paper, after giving an overview on Fraunhofer IIS' HallinOne ® technology, we present a software environment for the design of 3D magnetic position sensor systems, which supports the design process from feasibility studies unto preliminary testing of virtual prototypes. An application in the automotive domain is shown as an example.

Contribution to the Reduction of Annealing Processes in the Manufacturing of Valve Solenoids by Using Inline Measuring Technology in the Caulking Process

“…Hall sensor and AMS sensor. Hall sensors of the Fraunhofer Institute for Integrated Circuits called HallinOne® 3D Magnetic Field Sensor are mounted on the armature probe (AMS) [11,12]. The multidimensional sensor allows to detect three spatial directions of a magnetic field by means of a single component.…”

Real-Time and High-Accuracy Arctangent Computation Using CORDIC and Fast Magnitude Estimation

“…Particularly, the SENSASIP chip is used to implement the algorithms in [3,[19][20][21] in real time for the sensor signal processing of a 3D Hall sensor and of an inductive position sensor in X-by-wire automotive applications. In these specific applications, the real-time application requirements were met already with a clock frequency for SENSASIP of 8 MHz.…”

Application specific instruction set processor for sensor conditioning in automotive applications

“…SensASIP platform has been successfully adopted for remapping a 3D Hall's effect sensor conditioning algorithm, which is one of the most complex applications in the field [23]. The 3D magnetic sensor signal processing needs some correction stages for an accurate magnetic field calculation (correction of offset, sensitivity and their drift over temperature) which require sum, shift and multiplication; a CORDIC block for a spherical coordinates position calculation; memory accesses to get processing parameter values; some linearizations to map the position values in the correct ranges.…”