Control circuit for sensor array and related methods
First Claim
1. A method of automatically adjusting gain when scanning an array of pressure or force responsive sensor elements, the method comprising:
- (A) detecting a frame of received signals corresponding to a plurality of sensor elements of the array being scanned;
(B) determining a signal strength value at least partially based on the frame of received signals, the signal strength value comprising a count of a number of the received signals of the frame that are greater than a threshold signal value; and
(C) adjusting a gain applied to at least some signals received from the array based at least partially on the signal strength value.
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Accused Products
Abstract
A control circuit for scanning a pressure or force responsive sensor array is disclosed. Pressure or force sensors formed of an array of pressure or force responsive sensor elements can be used to acquire pressure or force measurements in response to an applied load. The control circuit can sample signals from the sensor elements to detect the pressure or force at one or more sensor elements of the sensor array. The circuit herein may provide for relatively faster scan rates. A user may define a subset or subsets of sensor elements of the sensor array to be scanned. Various methods and related circuitry for adjusting for sensor characteristics are also disclosed.
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Citations
17 Claims
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1. A method of automatically adjusting gain when scanning an array of pressure or force responsive sensor elements, the method comprising:
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(A) detecting a frame of received signals corresponding to a plurality of sensor elements of the array being scanned; (B) determining a signal strength value at least partially based on the frame of received signals, the signal strength value comprising a count of a number of the received signals of the frame that are greater than a threshold signal value; and (C) adjusting a gain applied to at least some signals received from the array based at least partially on the signal strength value. - View Dependent Claims (2, 3, 4)
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5. A method of automatically adjusting gain when scanning an array of pressure or force responsive sensor elements, the method comprising:
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(A) detecting a frame of received signals corresponding to a plurality of sensor elements of the array being scanned; (B) determining a signal strength value at least partially based on the frame of received signals, wherein the signal strength value comprises an average received signal of the frame of received signals; and (C) adjusting a gain applied to at least some signals received from the array based at least partially on the signal strength value. - View Dependent Claims (6, 7, 8)
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9. A method of calibrating a sensitivity of a sensor array of pressure or force responsive sensor elements, each of the sensor elements being connected by one of one or more first electrodes and one of one or more second electrodes, the sensor elements having signals generated therethrough, the signals being characteristic of a pressure or force applied to the sensor array, the one or more second electrodes having received signals thereon associated with the sensor elements, the received signals being modified by a gain value, the method comprising:
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(A) obtaining received signals associated with at least some of the sensor elements; and (B) determining the gain value that modifies the received signals associated with the at least some of the sensor elements so that at least some of the received signals associated with the at least some of the sensor elements lie within a desired range, wherein (B) comprises; determining an average received signal of the received signals associated with the at least some of the sensor elements; and determining the gain value that modifies the received signals associated with the at least some of the sensor elements so that the average received signal lies within the desired range, wherein the desired range comprises a saturation point of the average received signal. - View Dependent Claims (10, 11, 12, 13)
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14. A method of calibrating a sensitivity of a sensor array of pressure or force responsive sensor elements, each of the sensor elements being connected by one of one or more first electrodes and one of one or more second electrodes, the sensor elements having signals generated therethrough, the signals being characteristic of a pressure or force applied to the sensor array, the one or more second electrodes having received signals thereon associated with the sensor elements, the received signals being modified by a gain value, the method comprising:
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(A) obtaining received signals associated with at least some of the sensor elements; and (B) determining the gain value that modifies the received signals associated with the at least some of the sensor elements so that at least some of the received signals associated with the at least some of the sensor elements lie within a desired range, wherein the desired range comprises a saturation point of the at least some of the received signals. - View Dependent Claims (15, 16, 17)
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Specification