04938228 is referenced by 153 patents and cites 9 patents.

A wrist worn heart rate monitor (100) senses a noisy biosignal with one sensor (104A) in contact with the user's finger and another sensor (104B) in contact with the user's wrist. The sensed signal is modified by a filter (112), analog to digital converter (116) and digital filter (264). A correlator (272) and QRS detector (286) are used to determine characteristics of a first segment of the modified signal. A match filter (300) and learned user reference (206) are used to match a second segment of the modified signal with the determined characteristics of the first segment to produce a processed signal. The QRS detector (286), an interval judge (292), and a momentum machine (202) determine the heart rate from the processed signal. A performance predictor (260) predicts how well the heart rate monitor (100) will perform with an individual user.

Title
Wrist worn heart rate monitor
Application Number
7/311529
Publication Number
4938228
Application Date
February 15, 1989
Publication Date
July 3, 1990
Inventor
John J Fallin
7680 SW 182 Pl., Aloha, 97007
OR, US
William H Righter
540 SW 191st, Aloha, 97006
OR, US
Agent
Stoel Rives Boley Jones & Grey
IPC
A61B 5/02
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