Apparatus and method for detecting heartbeat using PPG
First Claim
1. An apparatus for detecting a heartbeat using a photoplethysmography (PPG), comprising:
- a sensor unit for detecting a PPG signal from a body of a user;
a mean interbeat interval estimating unit for calculating an expected mean interbeat interval based on the detected PPG signal; and
a heartbeat sequence/mean heart rate extracting unit for detecting candidate heartbeat sequences from the PPG signal using the expected mean interbeat interval and extracting an optimal heartbeat sequence or a mean heart rate from the candidate heartbeat sequences.
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Abstract
The present invention relates to an apparatus and method capable of detecting a heartbeat using a photoplethysmography (PPG) even under a motion of a user. A primary object of the present invention is to allow the heartbeat of the user to be effectively detected from a PPG signal even under the motion. The object of the present invention is accomplished by the following process of acquiring the PPG signal from the user through a PPG sensor unit, detecting candidate heartbeat sequences from the PPG signal after calculating an expected mean interbeat interval through a signal processing technique based on the wavelet transformation and an autocorrelation function, and extracting an optimal heartbeat sequence or mean heart rate from the candidate heartbeat sequences.
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Citations
25 Claims
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1. An apparatus for detecting a heartbeat using a photoplethysmography (PPG), comprising:
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a sensor unit for detecting a PPG signal from a body of a user;
a mean interbeat interval estimating unit for calculating an expected mean interbeat interval based on the detected PPG signal; and
a heartbeat sequence/mean heart rate extracting unit for detecting candidate heartbeat sequences from the PPG signal using the expected mean interbeat interval and extracting an optimal heartbeat sequence or a mean heart rate from the candidate heartbeat sequences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of detecting a heartbeat using a photoplethysmography (PPG), comprising the steps of:
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(a) detecting a PPG signal received from a user through a PPG sensor unit;
(b) calculating an expected mean interbeat interval (mean IBI) from the PPG signal; and
(c) detecting determining an optimal heartbeat sequence or mean heart rate from candidate heartbeat sequences which have been detected from the PPG signal using the expected mean interbeat interval. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification