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PPG heart rate estimation method and system, storage medium and equipment

A heart rate and frequency component technology, applied in the field of heart rate detection, can solve the problems of inability to process PPG signals, inaccurate decomposition results, lack of adaptability, etc., and achieve the effects of small time complexity, elimination of adverse effects, and intuitive results

Inactive Publication Date: 2021-08-10
SHANDONG UNIV +1
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  • Application Information

AI Technical Summary

Problems solved by technology

However, although the filter bank method has real-time performance, it cannot deal with the situation that the PPG signal is damaged by motion artifacts; the wavelet transform method has good anti-interference ability, but lacks adaptability and needs to manually select parameters, and these parameters are is unknown; Empirical Mode Decomposition is proposed in recent years and can handle non-stationary and nonlinear signals very well, but due to the intermittent and noise interference of PPG signals, it is easy to appear mode aliasing, which makes the decomposition results inconsistent precise

Method used

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  • PPG heart rate estimation method and system, storage medium and equipment
  • PPG heart rate estimation method and system, storage medium and equipment
  • PPG heart rate estimation method and system, storage medium and equipment

Examples

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Embodiment 1

[0052] Such as figure 1 As shown, this embodiment provides a PPG heart rate estimation method. This embodiment uses the method applied to a server as an example for illustration. system, and is realized through the interaction between the terminal and the server. The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or it can provide cloud services, cloud database, cloud computing, cloud function, cloud storage, network server, cloud communication, intermediate Cloud servers for basic cloud computing services such as software services, domain name services, security service CDN, and big data and artificial intelligence platforms. The terminal may be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, etc., but is not limited thereto. The terminal and the server may be connected directly or indirectly through wired or wireless communication, which ...

Embodiment approach

[0056] As one or more implementations, based on the reconstructed modality, determining the intrinsic mode function synchronized with the heart rate according to the reconstructed modality includes: passing the reconstructed modality through a band-pass filter, to filter out interference, and to determine the intrinsic mode function synchronized with the heart rate.

[0057] The obtaining the frequency spectrum corresponding to each mode based on the intrinsic mode function includes: performing fast Fourier transform on the intrinsic mode function to obtain the frequency spectrum corresponding to each mode.

[0058] This implementation can adopt the following specific steps:

[0059] 1. VMD process

[0060] To intercept the PPG signal with a duration of 10s each time, it is necessary to ensure that the signal is decomposed into limited bandwidth modal components with a central frequency, and at the same time the sum of the estimated bandwidths of each mode must be the smalles...

Embodiment 2

[0088] This embodiment provides a PPG heart rate estimation system.

[0089] A PPG heart rate estimation system comprising:

[0090] The decomposition module is configured to: use variational mode decomposition to decompose the obtained PPG signal into several natural modes according to the set mode number;

[0091] The reconstruction module is configured to: perform independent component analysis on the mode corresponding to the original PPG signal and several natural modes after variable mode decomposition, to obtain the reconstructed mode;

[0092] An estimation module configured to obtain an estimated heart rate based on the reconstructed modality.

[0093] It should be noted here that the above-mentioned decomposition module, reconstruction module and estimation module correspond to steps S101 to S103 in the first embodiment, and the examples and application scenarios realized by the above-mentioned modules and corresponding steps are the same, but are not limited to the...

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Abstract

The invention belongs to the field of heart rate detection, and provides a PPG heart rate estimation method and system, a storage medium and equipment. The method comprises the following steps: decomposing an obtained PPG signal into a plurality of intrinsic modes according to a set mode number by adopting variational mode decomposition; performing independent component analysis on the mode corresponding to the original PPG signal and the plurality of intrinsic modes subjected to the variable mode decomposition to obtain a reconstructed mode; and obtaining an estimated heart rate based on the reconstructed mode.

Description

technical field [0001] The invention belongs to the field of heart rate detection, and in particular relates to a method, system, storage medium and equipment for heart rate estimation based on photoplethysmography (PPG) through variational mode decomposition (VMD) and independent component analysis (ICA). Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Heart rate is an important parameter to indicate the health status of the human body. With the increase of life pressure, people pay more and more attention to the monitoring of heart activity. Traditional heart rate detection based on electrocardiogram is very troublesome for ordinary users, so it is necessary to develop a method for heart rate estimation through portable electronic devices, so that people can monitor heart rate in a non-invasive and comfortable way. The PPG signal is a k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024G06K9/00
CPCA61B5/02416A61B5/7257A61B5/725A61B5/7203G06F2218/00
Inventor 杨公平王子欣孙启玉张永忠刘圆圆刘晓芳
Owner SHANDONG UNIV
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