Adaptive Angle Sensor Calibration for Magnetic Field Precision

The system performs preliminary calibration by rotating the target through multiple positions and measuring signals at each position. These preliminary measurements are used to calculate offset adjustment vectors, sensitivity mismatch coefficients, and non-orthogonality coefficients before normal operation begins. This preliminary action eliminates measurement errors that would otherwise degrade precision and reliability during actual use.

The calibration process involves changing the angular position parameter of the rotating target through multiple discrete positions. By measuring signals at different angular positions and analyzing how the sensing elements respond to parameter changes, the system calculates correction coefficients that compensate for sensitivity mismatches and non-orthogonality, thereby improving measurement precision.

The system performs self-calibration by using its own sensing elements to measure signals at multiple angular positions and automatically calculate the necessary correction coefficients. The processing circuitry within the sensor itself computes offset adjustment vectors, sensitivity mismatch coefficients, and non-orthogonality coefficients without requiring external calibration equipment, thereby reducing overall system complexity while maintaining high measurement precision.

The processing circuitry serves multiple functions: it processes real-time sensor signals for angular position measurement, performs calibration calculations by analyzing signals at different positions, and stores correction coefficients for ongoing compensation. This multi-functionality eliminates the need for separate calibration devices or systems, reducing device complexity while achieving high measurement precision.