Measurement of torsion in bar by attaching two permanent magnets to one section of bar such that a semicircular field is produced and a directional magneto-resistive sensor to a second bar section

摘要

A bar (2) such as used in assisted steering has circular flanges (6,7) which support a deformable frame (3). A magnetic element consisting of two permanent magnets (8A,8B) placed side by side counter magnetically and fixed to a side (4) produces a local semicircular field and changes of direction caused by relative movement are detected by a magneto-resistive sensor (13) attached to a second side (5)