Movement noise detection method suitable for heart rate signals

A technology of noise detection and heart rate signal, applied in the field of information processing, to improve the accuracy of heart rate measurement

Active Publication Date: 2016-02-03
北京利安盛华科技有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to provide a method for accurately detecting motion noise in the heart rate signal when the motion noise is very strong, so as to lay a foundation for improving the accuracy of the heart rate measurement value of the wearable heart rate measurement device

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  • Movement noise detection method suitable for heart rate signals
  • Movement noise detection method suitable for heart rate signals
  • Movement noise detection method suitable for heart rate signals

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Embodiment 1

[0022] Embodiment 1. Detection method of motion noise in heart rate signal

[0023] figure 1 It is a schematic flowchart of the motion noise detection method of this embodiment.

[0024] figure 1 The present embodiment shown is the overall process of the method for detecting motion noise in the heart rate signal, which mainly includes the following steps:

[0025] Step S210, the wearable heart rate measurement device uses two photoplethysmography sensors distributed in different positions to collect photoplethysmography signals of two channels, and uses a three-axis accelerometer to collect motions of three channels within the same time period acceleration signal.

[0026] In step S220, the initial sampling frequency of the original signal is 125 Hz, and in order to reduce the amount of calculation, it is necessary to down-sample the original signal to a sampling frequency of 25 Hz.

[0027] In step S230, the above-mentioned down-sampled signal needs to be filtered by a se...

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Abstract

The invention discloses a movement noise detection method suitable for heart rate signals. The method aims at improving the heart rate measurement accuracy of a wearable heart rate measurement device. In the method, the wearable heart rate measurement device collects multiple pulse oximeter signals and movement acceleration signals, during the same time period, of a user; a frequency spectrum matrix is formed by the pulse oximeter signals and the movement acceleration signals, and a combined sparse spectrum reconstitution model is established by extracting the overall sparse and line sparse structure characteristics in the frequency spectrum matrix; then, a sparse frequency spectrum matrix in the combined sparse reconstitution model is calculated through the inaccurate augmented lagrangian multiplier method, and calculated signals has the advantage that the spectrum peak positions of movement acceleration signal frequency spectrums are basically the same as the spectrum peak positions of the pulse oximeter signals. By means of the method, strong movement noise in heart rate signals can be accurately detected, and the theoretical foundation is laid for effectively removing strong movement noise in heart rate signals.

Description

technical field [0001] The invention relates to the field of information processing, in particular to a motion noise detection method suitable for heart rate signals. Background technique [0002] Photoplethysmography (Photoplethysmography, PPG) is a non-invasive detection method for detecting changes in blood volume in living tissue by means of photoelectric means. to the photoelectric receiver. During this process, the light intensity detected by the detector will be weakened due to the absorption and attenuation of skin, muscle and blood. The absorption of light by skin, muscle and tissue remains constant throughout the blood circulation, while The blood volume in the skin changes pulsatingly under the action of the heart. As a result, the light intensity detected by the photoelectric receiver changes in a pulsating manner. The change of the volume pulse blood flow can be obtained by converting the light intensity change signal into an electrical signal, that is, a pho...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0245A61B5/00G06F19/00
Inventor 熊继平蔡丽桑汤清华王妃
Owner 北京利安盛华科技有限公司
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