Linear and rotary magnetic sensor
First Claim
Patent Images
1. A sensor for detecting linear and rotary motion of a workpiece, comprising:
- a first magnet mounted on the workpiece;
a sensor using said first magnet for detecting rotary motion of the workpiece;
said first magnet being spirally mounted on at least a portion of the workpiece and juxtaposed to at least a portion of said sensor;
wherein there is a second magnet mounted on the workpiece, said sensor using said second magnet for detecting linear motion of the workpiece;
said second magnet being mounted to circumscribe at least a portion of the workpiece and juxtaposed to at least a portion of said sensor.
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Abstract
A magnetic-based sensor is disclosed which can detect a linear and rotary position of a shaft whose movement is to be measured. Such sensor can operate to yield linear displacement as well as rotation. A position magnet is mounted on the shaft for measuring linear motion. A spirally wound magnet is mounted on the shaft to detect rotational motion. Both of such motions are detected by a single magnetic-based sensor.
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Citations
21 Claims
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1. A sensor for detecting linear and rotary motion of a workpiece, comprising:
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a first magnet mounted on the workpiece;
a sensor using said first magnet for detecting rotary motion of the workpiece;
said first magnet being spirally mounted on at least a portion of the workpiece and juxtaposed to at least a portion of said sensor;
wherein there is a second magnet mounted on the workpiece, said sensor using said second magnet for detecting linear motion of the workpiece;
said second magnet being mounted to circumscribe at least a portion of the workpiece and juxtaposed to at least a portion of said sensor. - View Dependent Claims (2, 3, 18, 19, 20)
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4. A sensor for detecting linear and rotary motion of a workpiece, comprising:
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a first magnet mounted on the workpiece;
a sensor using said first magnet for detecting rotary motion of the workpiece, at least a portion of said sensor mounted substantially parallel to the rotation axis of the workpiece; and
said first magnet being spirally mounted on at least a portion of the workpiece and juxtaposed to at least a portion of said sensor;
wherein there is a second magnet mounted on the workpiece, said sensor using said second magnet for detecting linear motion of the workpiece;
said second magnet being mounted to circumscribe the circumference on at least a portion of the workpiece and juxtaposed to at least a portion of said sensor;
wherein said sensor is mounted substantially parallel to at least a portion of the workpiece where said first magnet and such second magnet are mounted;
wherein said sensor is juxtaposed to at least the portion of the workpiece to which it is substantially parallel;
wherein said sensor is a magnetostrictive sensor. - View Dependent Claims (5, 6, 7, 8)
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9. A gear system sensor to detect gear position, the gear system including a rotary and linear motor connected to, and linear displacing and rotating, a shifter shaft which engages the appropriate gears, comprising:
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a first magnet mounted on the shifter shaft;
a sensor using said first magnet for detecting rotary motion of the shifter shaft to determine the gear selected through the use of said first magnet on the shifter shaft, at least a portion of said sensor mounted juxtaposed to the shifter shaft on which said first magnet is mounted; and
said first magnet being spirally mounted on at least a portion of the portion of the shifter shaft juxtaposed to said magnet based sensor. - View Dependent Claims (10, 11, 12)
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13. A sensor for detecting linear and rotary motion of a workpiece, comprising:
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a first magnet mounted on the workpiece;
means for detecting rotary motion responsive to said first magnet, at least a portion of said means mounted substantially parallel to the rotation axis of the workpiece for the length of said first magnet; and
said first magnet being spirally mounted on at least a portion of the workpiece and juxtaposed to at least a portion of said means responsive to said first magnet. - View Dependent Claims (14, 15, 16, 17)
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21. A process for determining the linear and rotary displacement of a workpiece using a first magnet, the first magnet spirally mounted on the workpiece and a second annular magnet about at least a portion of the workpiece, comprising the steps of:
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sensing the rotational location of the first magnet by the sensor;
sensing the linear location of the second magnet by the sensor;
determining the linear position of the workpiece from the second magnet;
determining the rotational position of the workpiece as the difference between the linear position of the workpiece and the position of the first magnet.
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Specification