POSITION SENSOR
First Claim
1. A position sensor for measuring the position of an object comprising:
- a sensing element;
an oscillator coupled to the sensing element such that an electromagnetic field is emitted from the sensing element;
an output arranged to provide a signal which varies in dependence upon a change in an electrical property of the oscillator, wherein a change in object position relative to the sensing element alters the electrical property of the oscillator; and
wherein the sensing element comprises at least one discontinuity arranged to perturb the signal at a predetermined object position.
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Accused Products
Abstract
Position sensor (10′) and method for measuring the position of an object comprising, a sensing element and an oscillator (30) coupled to the sensing element such that an electromagnetic field is emitted from the sensing element. An output, arranged to provide a signal, varies in dependence upon a change in an electrical property of the oscillator (30). Change in object position relative to the sensing element alters the electrical property of the oscillator (30). Sensing element comprises at least one discontinuity arranged to perturb the signal at a predetermined object position. Alternatively, there is a temperature compensator in proximity to the sensing element and arranged to compensate the signal for changes in temperature.
23 Citations
25 Claims
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1. A position sensor for measuring the position of an object comprising:
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a sensing element; an oscillator coupled to the sensing element such that an electromagnetic field is emitted from the sensing element; an output arranged to provide a signal which varies in dependence upon a change in an electrical property of the oscillator, wherein a change in object position relative to the sensing element alters the electrical property of the oscillator; and wherein the sensing element comprises at least one discontinuity arranged to perturb the signal at a predetermined object position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A position sensor for measuring the position of an object comprising:
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a sensing element; an oscillator coupled to the sensing element such that an electromagnetic field is emitted from the sensing element; an output arranged to provide a signal which varies in dependence upon a change in an electrical property of the oscillator, wherein a change in object position relative to the sensing element alters the electrical property of the oscillator; and a temperature compensator arranged to compensate the signal for changes in temperature in proximity to the sensing element. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of sensing the position of an object comprising the steps of:
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providing a sensing element; coupling an oscillator to the sensing element such that an electromagnetic field is emitted from the sensing element; providing a signal which varies in dependence upon a change in an electrical property of the oscillator, wherein a change in object position relative to the sensing element alters the electrical property of the oscillator, and wherein the sensing element comprises at least one discontinuity arranged to perturb the signal at a predetermined object position. - View Dependent Claims (23)
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24. A method of sensing the position of an object comprising the steps of:
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providing a sensing element; coupling an oscillator to the sensing element such that an electromagnetic field is emitted from the sensing element; providing a signal which varies in dependence upon a change in an electrical property of the oscillator, wherein a change in object position relative to the sensing element alters the electrical property of the oscillator; and compensating the signal for changes in temperature in proximity to the sensing element. - View Dependent Claims (25)
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Specification