Magnetic Sensor Angle Estimation for Foldable Hinge

The patent applies parameter changes by detecting not only the magnitude of magnetic flux density but also its direction (angular information). By utilizing multiple components of magnetic flux density vectors and calculating angular relationships, the system transforms the detection parameters to extract angle information that is less susceptible to magnetic field variations and hysteresis effects, thereby improving measurement precision while maintaining reliability.

The patent implements feedback mechanisms by continuously monitoring magnetic flux density measurements and using this information to calculate and update angle estimates. The system compares detected magnetic field patterns with expected patterns to refine angle detection, compensating for magnetic field variations and hysteresis effects through iterative correction, thus improving both measurement precision and reliability.

The patent transitions from scalar magnetic flux density magnitude detection to vector-based detection by measuring multiple components (e.g., X, Y, Z components) of the magnetic flux density. This dimensional expansion allows the system to calculate angular relationships and detect angle information that is invariant to certain magnetic field interferences, thereby maintaining measurement precision while preserving the non-contact measurement capability.

The patent introduces mathematical calculations and coordinate transformations as intermediaries between the raw magnetic field measurements and the final angle determination. By processing magnetic flux density vectors through computational algorithms that account for magnetic field variations, the system filters out external interference and extracts accurate angle information, thus improving measurement precision without sacrificing the ease of non-contact operation.