Supercharge Your Innovation With Domain-Expert AI Agents!

BCG signal heart rate extraction method based on Stockwell transformation

An extraction method and signal technology, which is applied in the measurement of pulse rate/heart rate, medical science, sensors, etc., can solve the problems of window function single resolution and window shape, frequency division is not in place, wavelet transform frequency aliasing and other problems, to achieve high The effect of robustness

Inactive Publication Date: 2021-01-22
SHANDONG ARTIFICIAL INTELLIGENCE INST +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a windowing transform, the short-time Fourier transform has a window function that has nothing to do with frequency. The window function has the disadvantages of a single resolution and a fixed window shape. It cannot automatically adjust the time domain resolution and frequency domain resolution, and there is aliasing.
Wavelet transform has the disadvantages of frequency aliasing and insufficient frequency division

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • BCG signal heart rate extraction method based on Stockwell transformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Attached below figure 1 The present invention will be further described.

[0017] A kind of BCG signal heart rate extraction method based on Stockwell transformation, comprises the steps:

[0018] a) Collect and obtain BCG signal h[nT], h[nT]=[h(0),h(T),...,h((N-1)T)], where n=0,1,. .., N-1, N is the number of sampling points, T is the sampling time interval.

[0019] b) Normalize the BCG signal h[nT] to obtain a normalized BCG signal

[0020] c) via the formula m≠0 calculates the normalized BCG signal The result of the Stockwell transformation is a two-dimensional matrix In the formula, m=0,1,...,N-1, p=0,1,...,N-1, for The discrete Fourier transform of , e is a constant, i is an imaginary unit, i 2 =-1. Obtain a two-dimensional matrix through Stockwell transformation matrix The rows of represent the variation of the amplitude and phase of each frequency component with time; the columns of the matrix correspond to each sampling moment, and a fixed c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a BCG signal heart rate extraction method based on Stockwell transformation. A signal envelope is extracted based on a time-frequency domain generated by the Stockwell transformation, even if a user moves slightly in a measurement process, the heart rate can be accurately extracted, and even if large noise exists, the quality of the extracted envelope can be ensured. The Stockwell transformation is based on the time-frequency domain and is a linear time-frequency method, and the time-frequency domain enables the method to have higher robustness for noise generated by theuser and environmental vibration.

Description

technical field [0001] The invention relates to the technical field of physiological signal processing, in particular to a method for extracting heart rate of BCG signals based on Stockwell transformation. Background technique [0002] Along with life activities (existence), the human body produces various vibrations. These vibrations include large movements such as body movement and turning over, to tiny vibrations such as heart beating and breathing. Among them, during the beating process of the human heart, the blood will be injected into the blood vessels all over the body, causing slight vibration of the human body, and the Ballistocardiogram (BCG) signal can be obtained by detecting this weak vibration. BCG signal, as a physiological signal accompanying the human body, can be considered as a non-stationary signal, so the time-frequency domain is often used to extract relevant features, such as heart rate, heart rate variability (HRV), respiration rate (RR), relative p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61B5/024A61B5/00
CPCA61B5/024A61B5/7203
Inventor 许继勇舒明雷陈长芳刘瑞霞刘辉马明富
Owner SHANDONG ARTIFICIAL INTELLIGENCE INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com