Apparatus and method for measuring heart rate
First Claim
1. An apparatus for measuring heart rate, comprising:
- an exercise apparatus;
sensor means associated with said exercise apparatus for generating an input signal including the biopotential signal produced by the heart of the user while exercising;
autocorrelating means responsive to said input signal for periodically generating an autocorrelation signal of said input signal over a predetermined time period; and
signal indication means responsive to said autocorrelation signal for detecting the presence of a periodic signal in said autocorrelation signal and generating a heart rate signal corresponding to the frequency of said periodic signal.
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Accused Products
Abstract
An apparatus for measuring heart rate is provided which comprises a sensor for generating a signal which includes the biopotential signal produced by a heart. This signal is filtered, amplified and digitized. A microcomputer autocorrelates the digitized signal. A plurality of signal indication routines then scan the autocorrelated output for the presence of periodic signals. Each of the signal indication routines uses different search criteria, such as peak and waveform detection, and generates a candidate heart rate. An arbitrator then selects one of the candidate heart rates according to predetermined criteria. These criteria include the value of previously selected heart rates.
122 Citations
27 Claims
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1. An apparatus for measuring heart rate, comprising:
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an exercise apparatus; sensor means associated with said exercise apparatus for generating an input signal including the biopotential signal produced by the heart of the user while exercising; autocorrelating means responsive to said input signal for periodically generating an autocorrelation signal of said input signal over a predetermined time period; and signal indication means responsive to said autocorrelation signal for detecting the presence of a periodic signal in said autocorrelation signal and generating a heart rate signal corresponding to the frequency of said periodic signal. - View Dependent Claims (2, 3, 4)
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5. An apparatus for measuring heart rate, comprising:
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an exercise apparatus for providing a user with exercise; sensor means associated with said exercise apparatus for generating an input signal including the biopotential signal produced by the heart of the user while exercising; autocorrelating means responsive to said input signal for periodically generating an autocorrelation signal of said input signal over a predetermined time period; signal processing means responsive to said autocorrelation signal for detecting a plurality of indications of periodic signals in said input signal, and generating a plurality of candidate signals, each corresponding to one of the detected indications; and arbitration means responsive to said output signals for selecting according to predetermined selection criteria that one of said output signals which is most likely a true heart rate. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for measuring heart rate of a user while exercising, comprising:
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sensor means for generating an input signal including the biopotential signal produced by the user'"'"'s heart; autocorrelating means responsive to said input signal for periodically generating an autocorrelation signal of said input signal over a predetermined time period; signal processing means responsive to said autocorrelation signal for detecting a plurality of indications of periodic signals in said autocorrelation signal and generating a plurality of candidate signals corresponding to each of the detected indications; and arbitration means responsive to said output signals for selecting according to predetermined criteria that one of said candidate signals which most likely represents true heart rate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification