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.
134 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