Stimulus-based steering sensor device and method for the same

摘要

A stimulus-based steering sensor device and a method for the same are disclosed. The sensor device comprises at least one driving wheel, a processor, two driven wheels, and two resolvers. The processor generates a stimulus signal and has a signal-angle lookup table. The driving wheel contacts two driven wheels. When following the rotation of a steering column, the driving wheel drives two driven wheels to rotate at different speeds. Two resolvers connect with the processor, respectively engage with two driven wheels, receive the stimulus signal, and respectively output two first sinusoidal signals to the processor according to the rotational speeds of two driven wheels. The processor analyzes two first sinusoidal signals to obtain two second sinusoidal signals having different periods, and uses the second sinusoidal signals and the signal-angle lookup table to obtain a first absolute angle value of the rotation of the steering wheel.

主权项

1. A stimulus-based steering sensor device comprising
at least one driving wheel installed on a steering column of a steering wheel; a processor generating a stimulus signal and having a built-in signal-angle lookup table; two driven wheels contacting said driving wheel and driven by said driving wheel to rotate at different speeds when said driving wheel follows rotation of said steering column; and two resolvers connecting with said processor, respectively engaging with said two driven wheels, receiving said stimulus signal, and outputting two first sinusoidal signals to said processor according to rotations speeds of said two driven wheels, whereafter said processor analyzes said two first sinusoidal signals to obtain two second sinusoidal signals having different periods, and uses said two second sinusoidal signals, said signal-angle lookup table to obtain a first absolute angle value of rotation of said steering wheel.