Proximity switch assembly with signal drift rejection and method
First Claim
1. A method of activating a proximity switch assembly comprising:
- generating activation fields with a plurality of proximity sensors associated with a plurality of proximity switches;
monitoring amplitude of signals generated in response to the activation fields;
determining a smallest amplitude of the signals;
subtracting the smallest amplitude from each of the signals; and
determining activation of one of the plurality of proximity switches based on the subtracted signals.
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Abstract
A proximity switch assembly and method for detecting activation of a proximity switch assembly is provided. The method includes steps of generating activation fields with a plurality of proximity sensors associated with a plurality of proximity switches, monitoring amplitude of a signal generated in response to each of the activation fields, subtracting the smallest signal from each of the other signals, and determining activation of one of the plurality of proximity switches based on the subtracted signals. A proximity sensor assembly and method of suppressing noise for a plurality of proximity sensors is also provided, which includes subtracting the smallest signal from each of other signals associated with a plurality of proximity sensors and determining activation of one of the plurality of proximity sensors based on the subtracted signals.
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Citations
20 Claims
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1. A method of activating a proximity switch assembly comprising:
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generating activation fields with a plurality of proximity sensors associated with a plurality of proximity switches; monitoring amplitude of signals generated in response to the activation fields; determining a smallest amplitude of the signals; subtracting the smallest amplitude from each of the signals; and determining activation of one of the plurality of proximity switches based on the subtracted signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A proximity switch assembly comprising:
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a plurality of proximity switches each comprising a proximity sensor for providing a sense activation field; and control circuitry processing the activation field of each proximity switch to sense activation, said control circuitry monitoring amplitude of signals generated in response to the activation fields, determining a smallest amplitude of the signals, subtracting the smallest amplitude from each of the signals, and determining activation of one of the plurality of proximity switches based on the subtracted signals. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of suppressing noise for a plurality of proximity sensors, comprising:
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generating activation fields with the plurality of proximity sensors; monitoring amplitude of signals generated in response to the activation fields; determining a smallest amplitude from the signals; subtracting the smallest amplitude from each of the signals; and determining activation of one of the plurality of proximity sensors based on the subtracted signal. - View Dependent Claims (16, 17)
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18. A proximity sensor assembly comprising:
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a plurality of proximity sensors each providing a sense activation field; and control circuitry for processing the activation field of each proximity sensor to sense activation, said control circuitry monitoring amplitude of signals generated in response to the activation fields, determining a smallest amplitude of the signals, subtracting the smallest amplitude from each of the signals, and determining activation of one of the plurality of proximity sensors based on the subtracted signals. - View Dependent Claims (19, 20)
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Specification