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...

2005-03-01

2005-03-01

Nghiem, Michael (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Orientation or position

Reexamination Certificate

active

06862551

ABSTRACT:
A method is provided for measuring an absolute steering angle of a steering shaft for a vehicle using a first rotatable body and a second rotatable body that rotate together with the steering shaft of the vehicle at a predetermined rotation ratio, respectively. The method includes organizing a table by matching a plurality of relative rotational angle pairs (Ψ′, θ′), where Ψ′ is a relative rotational angle of the first rotatable body, and θ′ is a relative rotational angle of the second rotatable body, with respective absolute steering angles, Φs, that correspond to each of the relative rotational angle pairs. The method also includes obtaining a ΨM′ value by measuring the relative rotational angle Ψ′ of the first rotatable body and obtaining a θM′ value by measuring the relative rotational angle θ′ of the second rotatable body, using at least an angle sensor having a measurement range of Ω. The method further includes obtaining an absolute steering angle Φ of the steering shaft corresponding to the measured relative rotational angle pair (ΨM′, θM′) by looking up information in the table.

REFERENCES:
patent: 5930905 (1999-08-01), Zabler et al.
patent: 6466889 (2002-10-01), Schodlbauer
patent: 20040078166 (2004-04-01), Shin

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