Measuring rotary position of motor vehicle steering shaft - involves deriving coarse measurement from speed difference of front wheels

摘要

The method involves using a fine sensor producing a fine measurement signal over a 360 deg. range and coarse sensing over the entire multiple rotation range of the shaft. The coarse measurement signal is derived from an evaluation of the rotation of both front wheels of the motor vehicle in the form of steering angle region information. This can involve evaluating the difference in the speeds of both front wheels. ADVANTAGE - The method can be implemented without the use of a specific coarse sensor.