Dynamic heart rate and blood oxygen measuring method based on Pearson's correlation coefficient

A technology of Pearson correlation and measurement method, applied in the field of dynamic heart rate and blood oxygen measurement based on Pearson correlation coefficient, can solve the problems of high and inaccurate blood oxygen saturation measurement, and promote the research and application of human blood oxygen health The effect of development

Active Publication Date: 2017-12-12
CHENGDU ICARETECH
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a dynamic heart rate and blood oxygen measurement method based on the Pearson correlation coefficient, to overcome the defects of high or inaccurate blood oxygen saturation measurement in the state of exercise in the existing algorithm, and to be able to Accurately measure dynamic heart rate and blood oxygen saturation during exercise

Method used

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  • Dynamic heart rate and blood oxygen measuring method based on Pearson's correlation coefficient
  • Dynamic heart rate and blood oxygen measuring method based on Pearson's correlation coefficient
  • Dynamic heart rate and blood oxygen measuring method based on Pearson's correlation coefficient

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Embodiment

[0046] Such as figure 1 and figure 2 As shown, a dynamic heart rate and blood oxygen measurement method based on the Pearson correlation coefficient comprises the following steps:

[0047] S1. Use equipment with the function of measuring blood oxygen saturation of the human body to measure PPG signal data and three-axis gravity acceleration signal data, respectively select signal segments for the PPG signal data and three-axis gravity acceleration signal data, and select the signal segments Taking the current time as the center, select a signal segment of 5s time;

[0048] S2. Perform filter preprocessing on the PPG signal data signal segment, use a band-pass filter to filter to obtain the signal AC component, and use a low-pass filter to obtain the signal DC component, and obtain the PPG infrared light signal IR(t) and the PPG red light signal Red (t), wherein the infrared light signal contains pulse signal components, motion interference signal components and other noises...

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Abstract

The invention relates to the technical field of blood oxygen measurement, in particular to a dynamic heart rate and blood oxygen measuring method based on a Pearson's correlation coefficient. The method includes the steps of collecting signal data, preprocessing PPG data and triaxial accelerated speed data, calculating a curve indicating the changes of the Pearson's correlation coefficient along with rx, calculating the maximum wave crest and the minimum wave trough of the curve, calculating oxyhemoglobin saturation according to ra corresponding to the maximum wave crest and calculating the heart rate according to rv corresponding to the minimum wave through. The dynamic heart rate and blood oxygen measuring method based on the Pearson's correlation coefficient can achieve measurement of the oxyhemoglobin saturation under a movement state, overcome the defects of a high or inaccurate measurement value of the oxyhemoglobin saturation under the movement state, achieve accurate measurement of the dynamic heart rate and the oxyhemoglobin saturation under the movement state, and have a significant meaning in promotion of research and application development of blood oxygen health of the human body.

Description

technical field [0001] The invention relates to the technical field of blood oxygen measurement, in particular to a dynamic heart rate and blood oxygen measurement method based on Pearson correlation coefficient. Background technique [0002] Blood oxygen saturation (SpO2) is the percentage of the capacity of oxygen-bound oxyhemoglobin (HbO2) in the blood to the total hemoglobin (Hb, hemoglobin) capacity that can be combined, that is, the concentration of blood oxygen in the blood, which is the respiratory cycle important physiological parameters. The functional oxygen saturation is the ratio of HbO2 concentration to HbO2+Hb concentration, which is different from the percentage of oxyhemoglobin. Therefore, monitoring arterial oxygen saturation (SaO2) allows estimation of lung oxygenation and hemoglobin oxygen-carrying capacity. The blood oxygen saturation of normal human arterial blood is 98%, and that of venous blood is 75%. [0003] The metabolic process of the human bo...

Claims

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Application Information

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IPC IPC(8): A61B5/0205A61B5/1455
CPCA61B5/0205A61B5/02416A61B5/14551A61B5/681A61B5/721A61B5/7235A61B5/7246A61B5/7253
Inventor 朱芸
Owner CHENGDU ICARETECH
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