Swimming lap counter
First Claim
1. A lap counter for use by a swimmer, comprising:
- a case;
attachment means for attaching the case to a swimmer;
a compass sensor housed in the case providing an output signal which changes between opposite directions along which the swimmer swims back and forth; and
an operating circuit includinga processor programmed to distinguish changes in the output signal of the compass sensor between the opposite directions to identify a reversal in direction of swimming by the swimmer and to count laps, each lap being based on two successive reversals in direction, anda sliding window averaging circuit for smoothing the output signal of the compass sensor.
1 Assignment
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Accused Products
Abstract
A lap counter for use by a swimmer, has a case for attaching to the swimmer, and a compass sensor housed in the case for providing an output signal which changes between opposite directions along which the swimmer swims back and forth. An operating circuit includes a processor programmed to distinguish the change in the output signal of the compass sensor between the opposite directions to identify a reversal in direction of swimming by the swimmer and to count laps, each lap being based on two successive reversals in direction. The processor may also be programmed to distinguish the change in the compass sensor output signal to detect a rise above an upper threshold and a subsequent fall below a lower threshold, or vice versa, to identify, a wave in the output signal that represents a swimming stroke of the swimmer and to count the strokes.
18 Citations
20 Claims
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1. A lap counter for use by a swimmer, comprising:
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a case; attachment means for attaching the case to a swimmer; a compass sensor housed in the case providing an output signal which changes between opposite directions along which the swimmer swims back and forth; and an operating circuit including a processor programmed to distinguish changes in the output signal of the compass sensor between the opposite directions to identify a reversal in direction of swimming by the swimmer and to count laps, each lap being based on two successive reversals in direction, and a sliding window averaging circuit for smoothing the output signal of the compass sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A lap counter for use by a swimmer, comprising:
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a case; attachment means for attaching the case to a swimmer; a compass sensor housed in the case providing an output signal which changes between opposite directions along which the swimmer swims back and forth; an operating circuit including a processor programmed to distinguish changes in the output signal of the compass sensor between the opposite directions to identify a reversal in direction of swimming by the swimmer and to count laps, each lap being based on two successive reversals in direction; and input means on the case for input of body weight of the swimmer, wherein the operating circuit is programmed to identify changes in the output signal of the compass sensor between successive strokes of the swimmer for determining stroke frequency, and to calculate calorie consumption by the swimmer according to number of laps, the stroke frequency, the body weight of the swimmer, and duration of swimming. - View Dependent Claims (17)
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18. A stroke counter for use by a swimmer, comprising:
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a case; attachment means for attaching the case to a swimmer; a compass sensor housed in the case for providing an output signal which changes as the swimmer swims; and an operating circuit including a processor programmed to distinguish changes in the output signal of the compass sensor to detect a rise above a predetermined upper threshold and a subsequent fall below a predetermined lower threshold, or vice versa, to identify a wave in the output signal representing a swimming stroke of the swimmer and to count the strokes. - View Dependent Claims (19, 20)
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Specification