Method for Detecting Angle in a Steering System

A steering system angle sensing method for sensing the rotation of one or more rotating components in a steering system, wherein each of the one or more rotating components is configured with a magnet, and the steering system comprises:

• a main gear, connected to a steering shaft;
• one or more driven gears, respectively meshing with the main gear;
• one or more magnets, respectively disposed on the one or more driven gears;
• one or more magnetic angle sensors, respectively configured to sense the magnetic field angles generated by the one or more magnets and output one or more absolute angle values;
• a processing unit;
• and
• a storage unit, coupled to the processing unit, storing program code that instructs the processing unit to execute the steering system angle sensing method, enabling the sensing of the rotation of the one or more rotating components or driven gears using the one or more magnetic angle sensors, the steering system angle sensing method comprising the steps of:
• recording one or more first sets of absolute angle values between 0 and 360 degrees output by the one or more magnetic angle sensors after completing an initialization procedure as one or more starting absolute angles;
• calculating one or more current relative angle values based on the relationship between the one or more current absolute angle values measured by the one or more magnetic angle sensors and the one or more starting absolute angles;
• determining a rotation direction of the one or more rotating components or the one or more driven gears based on the one or more current relative angle values and their respective at least one set of previous relative angle values;
• determining a number of turns of the one or more rotating components or the one or more driven gears based on the positional changes of the one or more current relative angle values and their respective at least one set of previous relative angle values relative to a plurality of preset quadrants;
• and
• calculating and determining an actual rotation angle, direction, and a number of turns of the main gear meshed with the one or more rotating components or the one or more driven gears based on at least one of the one or more current relative angle values, the rotation direction of the one or more rotating components or the one or more driven gears, and the number of turns of the one or more rotating components or the one or more driven gears.