Steering angle detecting device
First Claim
1. A steering angle detecting device for a steering apparatus having a component which is displaceable depending on a change in a steering angle, comprising:
- an analog sensor for detecting a displacement of the component and producing an analog signal having a potential corresponding to the position of the component;
a digital sensor for detecting the displacement of the component and producing a predetermined number of pulses corresponding to a unit change in the steering angle;
basic count determining means for determining a basic count corresponding to the steering angle based on the analog signal produced by said analog sensor when said steering angle starts to be detected;
counting means for generating and holding a count corresponding to the steering angle by adding or subtracting the numer of pulses produced by said digital sensor to or from said basic count;
steering angle calculating means for calculating said steering angle based on said count; and
correcting means for correcting said count when the component is positioned in a position corresponding to a predetermined reference steering angle.
1 Assignment
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Accused Products
Abstract
A steering angle detecting device employs an analog sensor and a digital sensor to detect a displacement of a component which is displaceable depending on a change in a steering angle in a steering apparatus. The steering angle detecting device includes an analog sensor for detecting a displacement of the component and producing an analog signal having a potential corresponding to the position of the component, a digital sensor for detecting the displacement of the component and producing a predetermined number of pulses corresponding to a unit change in the steering angle, a basic count determining unit for determining a basic count corresponding to the steering angle based on the analog signal produced by the analog sensor when a steering angle starts to be detected, a counter for generating and holding a count corresponding to the steering angle by adding or subtracting the number of pulses produced by the digital sensor to or from the basic count, a steering angle calculating unit for calculating a steering angle based on the count, and a correcting unit for correcting the count when the component is positioned in a position corresponding to a predetermined reference steering angle.
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Citations
10 Claims
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1. A steering angle detecting device for a steering apparatus having a component which is displaceable depending on a change in a steering angle, comprising:
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an analog sensor for detecting a displacement of the component and producing an analog signal having a potential corresponding to the position of the component; a digital sensor for detecting the displacement of the component and producing a predetermined number of pulses corresponding to a unit change in the steering angle; basic count determining means for determining a basic count corresponding to the steering angle based on the analog signal produced by said analog sensor when said steering angle starts to be detected; counting means for generating and holding a count corresponding to the steering angle by adding or subtracting the numer of pulses produced by said digital sensor to or from said basic count; steering angle calculating means for calculating said steering angle based on said count; and correcting means for correcting said count when the component is positioned in a position corresponding to a predetermined reference steering angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A steering angle detecting device for a steering apparatus having a component which is displaceable in dependence on a change in a steering angle, comprising:
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analog sensing means for detecting a displacement of the component and for producing an analog signal corresponding to the position of the component; digital sensing means for also detecting the displacement of the component and for producing a digital signal corresponding to a unit change in the steering angle; means for determining a steering angle based on the analog signal and the digital signal; and correcting means for correcting the determined steering angle when the component is positioned in a position corresponding to a predetermined reference steering angle.
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Specification