Method for measuring the absolute steering angle of steering...

Details Method for measuring the absolute steering angle of steering... Method for measuring the absolute steering angle of steering...

2005-09-06

2005-09-06

Nghiem, Michael (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Orientation or position

Reexamination Certificate

active

06941241

ABSTRACT:
A method is provided for measuring an absolute steering angle Φ of a steering shaft for a vehicle, using a first rotatable body that rotates together with the steering shaft of the vehicle at a predetermined rotation ratio. The method includes obtaining a ΨM′ value by measuring a relative rotational angle Ψ′ of the first rotatable body using an angle sensor having a measurement range of Ω. The method also includes obtaining a present value for a frequency i-value of the first rotatable body by comparing the present ΨM′ value to a previous ΨM′ value. The method also includes obtaining a present value for a absolute steering angle Φ1 of the steering shaft from a present value for an absolute rotational angle Ψ of the first rotatable body by using the ΨM′ value and the present i-value.

REFERENCES:
patent: 5930905 (1999-08-01), Zabler et al.
patent: 6466889 (2002-10-01), Schodlbauer
patent: 6848187 (2005-02-01), Ito et al.
patent: 6862551 (2005-03-01), Kang et al.
patent: 2004/0078166 (2004-04-01), Shin
U.S. Appl. No. 10/748,152, filed Dec. 31, 2003, Lee et al., “Method for Measuring the Absolute Steering Angle of Steering Shaft for Vehicle”.

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