Magnetic position sensor apparatus, method and system with error detection

• Main Authors: KLOOS GERHARD, TOMBEZ LIONEL, BIDAUX YVES
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

Magnetic position sensor devices, methods, and systems with error detection are described. The position sensor device comprises two or more magnetic sensors (S1, S2) capable of measuring one or two or three orthogonal magnetic field components (Bx, By, Bz) at different sensor positions, and a processing circuit; processing circuitry for determining first, second and third differences ([Delta] Bx12, [Delta] Bz12, [Delta] By12) of the two respective components, and for determining a first ratio (R1) of the first difference to the second difference ([Delta] Bx12, [Delta] Bz12), and for determining and outputting a first angle ([Theta] Primary) based on the first ratio (R1); and for determining a second ratio (R2) of the first difference to the third difference ([Delta] Bx12, [Delta] By12), for optionally determining a second angle ([Theta] Assist), optionally comparing the two angles or the two ratios; and to output at least one of: the second angle, the two ratios, a diagnostic signal based on a comparison of t