Electronic pedometer
First Claim
1. A pedometer comprising measurement means for measuring the actual distance between the user'"'"'s legs during each step taken by the user, means responsive to the measurement means for determining the stride length for each step taken by the user, means for adding together the stride lengths over a plurality of steps, and means for displaying a sum of the stride lengths over the plurality of steps.
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Accused Products
Abstract
A pedometer is disclosed which calculates the distance a user walks, jogs or runs by electronically measuring the length of each stride taken by the user. Stride length is measured using ultrasonic waves. The pedometer comprises an ultrasonic generator module which is strapped to one leg of the user. An ultrasonic detector module is strapped to the other leg of the user. The generator module emits pulses of ultrasonic energy which are detected by the detector module. A processor and display module in the form of a wristwatch is also provided. The processor module is used to calculate stride length based on the speed of sound and the time delay between pulses emitted and detected by the leg-mounted modules. The pedometer is capable of displaying on a digital display the distance traveled, time per unit distance, elapsed time and time of day. The pedometer is also programmed to compensate for a variety of measurement errors.
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Citations
15 Claims
- 1. A pedometer comprising measurement means for measuring the actual distance between the user'"'"'s legs during each step taken by the user, means responsive to the measurement means for determining the stride length for each step taken by the user, means for adding together the stride lengths over a plurality of steps, and means for displaying a sum of the stride lengths over the plurality of steps.
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2. A pedometer comprising measurement means for measuring the maximum distance between the user'"'"'s legs for each step taken by the user, means responsive to the measurement means for determining the stride length for each step taken by the user, means for adding together the stride lengths over a plurality of steps, and means for displaying a sum of the stride lengths over the plurality of steps, and in which the measurement means for measuring the maximum distance between the user'"'"'s legs includes:
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means positioned on one leg of the user for emitting ultrasonic energy; means positioned on the other leg of the user for detecting the emitted ultrasonic energy; and means responsive to the means for detecting the emitted ultrasonic energy for determining the maximum distance between the user'"'"'s legs. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 11)
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12. A pedometer comprising length of stride determining means carried by a user, including:
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sender means positioned on one leg of the user for sending a signal; responder means positioned on the other leg of the user for responding to the sender means; means responsive to the responder means for determining the stride length of the user; and
means for adding together the stride lengths determined over a plurality of steps taken by the user.
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Specification