Proximity switch assembly and method having adaptive time delay
First Claim
1. A method for detecting activation of a proximity switch comprising:
- generating an activation field with a proximity sensor;
monitoring a signal responsive to the activation field;
generating an adaptive time delay based on a rate of increase of the monitored signal such that a higher rate generates a shorter time delay;
detecting a peak amplitude of the signal; and
determining activation of the switch after expiration of the time delay following the peak amplitude detection.
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Accused Products
Abstract
A proximity switch assembly and method for detecting activation of the proximity switch assembly is provided. The assembly includes a plurality of proximity switches each providing a sense activation field and control circuitry processing the activation field of each proximity switch to sense activation. The control circuitry monitors the signal responsive to the activation field, determines a rate of change in signal amplitude for each signal, and generates an adaptive time delay based on the control circuitry. The control circuitry further detects a peak amplitude of the signal and determines activation of the switch after expiration of the time delay following the peak amplitude detection.
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Citations
20 Claims
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1. A method for detecting activation of a proximity switch comprising:
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generating an activation field with a proximity sensor; monitoring a signal responsive to the activation field; generating an adaptive time delay based on a rate of increase of the monitored signal such that a higher rate generates a shorter time delay; detecting a peak amplitude of the signal; and determining activation of the switch after expiration of the time delay following the peak amplitude detection. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for detecting activation of a proximity switch comprising:
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generating activation fields with a plurality of proximity sensors associated with a plurality of proximity switches; monitoring a signal responsive to each of the activation fields; determining a rate of increase in signal amplitude for each signal; generating an adaptive time delay based on the rate of increase such that a higher rate generates a shorter time delay; detecting a peak amplitude of the signal; and determining activation of one of the proximity switches after expiration of the time delay following the peak amplitude detection. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A proximity switch assembly comprising:
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a plurality of proximity switches each providing a sense activation field; and control circuitry processing the activation field of each proximity switch to sense activation, said control circuitry monitoring a signal responsive to the activation field, generating an adaptive time delay based on a rate of increase in signal amplitude such that a higher rate generates a shorter time delay, detecting a peak amplitude of the signal, and determining activation of a switch after expiration of the adaptive time delay following the peak amplitude detection. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification