Angular position sensor
First Claim
1. Apparatus for determining the angular position of a member with respect to a reference comprising:
- a mounting plate;
a first sensor operatively attached to said mounting plate;
a second sensor operatively attached to said mounting plate and positioned in a spaced-apart relationship with respect to said first sensor;
a disk member positioned adjacent said first and second sensors and being rotatable with respect to said mounting plate and said first and second sensors; and
means for producing a waveform,rotation of said disk member with respect to said mounting plate causing the actuation of said first and second sensors producing output signals substantially coinciding with a first point and a second point on said waveform.
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Accused Products
Abstract
An angular position sensor having high angular resolution and which provides an immediate indication of the angular position being measured upon the application of power to the position sensor is disclosed. A quadrature disk having a continuous notch or recess in the outer periphery thereof is rotatable with respect to quadrature sensors positioned in a spaced-apart relationship with respect to one another. Differing radii on the quadrature disk cause the actuation and deactuation of the quadrature sensors as the disk passes thereunder producing sharply defined output signal transitions. While this is occurring, the Hall-effect sensor produces a sine wave output. The orientation of the quadrature disk with respect to the quadrature sensors is such that the output signal transitions produced by the quadrature sensors correspond with the maximum and minimum values of the sine wave produced by the Hall-effect sensor. The resulting rotation and quadrant data from the quadrature sensors and the Hall-effect sensor are applied as inputs to a microprocessor where a determination of the angular orientation of the member connected to the angular position sensor is made with respect to any arbitrary reference point.
142 Citations
18 Claims
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1. Apparatus for determining the angular position of a member with respect to a reference comprising:
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a mounting plate; a first sensor operatively attached to said mounting plate; a second sensor operatively attached to said mounting plate and positioned in a spaced-apart relationship with respect to said first sensor; a disk member positioned adjacent said first and second sensors and being rotatable with respect to said mounting plate and said first and second sensors; and means for producing a waveform, rotation of said disk member with respect to said mounting plate causing the actuation of said first and second sensors producing output signals substantially coinciding with a first point and a second point on said waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification