06305221 is referenced by 282 patents and cites 41 patents.

A device that measures the distance traveled, speed, and height jumped of a person while running or walking. Accelerometers and rotational sensors are placed in the sole of one shoe along with an electronic circuit that performs mathematical calculations to determine the distance and height of each step. A radio frequency transmitter sends the distance and height information to a wristwatch or other central receiving unit. A radio frequency receiver in the wristwatch or other unit is coupled to a microprocessor that calculates an output speed based upon step-distance and elapsed time, and the distance traveled of the runner from the sum of all previous step distances. The output of the microprocessor is coupled to a display that shows the distance traveled, speed, or height jumped of the runner or walker.

Title
Rotational sensor system
Application Number
9/332794
Publication Number
6305221 (B1)
Application Date
June 14, 1999
Publication Date
October 23, 2001
Inventor
Lawrence J Hutchings
Castro Valley
CA, US
Agent
Sofer & Haroun
US
Assignee
Aeceleron Technologies
CA, US
IPC
G01P 15/08
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