Method for acquiring photoplethysmography signals

A technology of photoplethysmography and acquisition method, which is applied in medical science, sensors, catheters, etc., can solve the problems of low signal processing speed of adaptive filter, inability to realize automatic tracking of filter frequency, and inability to process pulse wave signal, etc. The signal acquisition method is convenient, the measurement is convenient, and the effect of reducing the error

Active Publication Date: 2016-11-09
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

Polynomial interpolation needs to find the "reference point"; the signal processing of wavelet transform depends on the selection of wavelet reference point, improper selection of wavelet reference point will have a great impact on the result; the signal processing speed of adaptive filter is not high, and The filtering frequency cannot be automatically tracked
None of these methods can handle the pulse wave signal very well.

Method used

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  • Method for acquiring photoplethysmography signals
  • Method for acquiring photoplethysmography signals
  • Method for acquiring photoplethysmography signals

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Embodiment approach

[0062] In the above embodiments, the skin area refers to an area in the skin that is rich in capillaries, where the change in the volume of the blood vessels causes a more obvious change in the light intensity signal, and thus the extracted pulse wave signal has a higher signal-to-noise ratio. As a specific embodiment of the present invention, obtaining the video of the skin area refers to that the color video of the human face area is formed by taking pictures of the human face area through the shooting device; the color video of the human face area is obtained by using a non-contact acquisition method , which reduces the error of the contact between the measured part and the sensor in the measuring device; at the same time, combined with the face automatic tracking and recognition technology, it can further realize the photoplethysmography signal measurement of the target moving within a certain range. As another specific embodiment of the present invention, obtaining the vid...

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Abstract

The invention discloses a method for acquiring photoplethysmography signals. The method comprises the following steps: acquiring video of a skin region; carrying out primary treatment on the video of the skin region and outputting primary photoplethysmography signals; and carrying out secondary treatment on the primary photoplethysmography signals, and outputting the photoplethysmography signals, wherein the video of the skin region is a colorful video, and the skin region is a human face region or a finger region. By the method for acquiring photoplethysmography signals, special measuring equipment is not required, measurement is facilitated, and the quality of the acquired photoplethysmography signals is relatively high.

Description

technical field [0001] The invention relates to the technical field of pulse wave signal acquisition, and more specifically, the invention relates to a method for acquiring a photoplethysmography signal. Background technique [0002] Photoplethysmography (Photo Plethysmo Graphy, PPG) is an optical measurement technique used to detect changes in blood volume in tissue microvessels. Under the action of the heart, it changes pulsatingly, so that the light intensity received by the photodetector changes pulsatingly with the change of blood volume, so as to obtain the change information of volume pulse blood flow. Photoplethysmography contains many important physiological information reflecting the functions of the cardiovascular system, such as heartbeat function and blood flow. The research on it has involved human blood pressure, blood flow, blood oxygen, brain oxygen, muscle oxygen, blood sugar, microcirculation Vascular pulse rate, respiratory rate and many other fields are...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/02A61B5/0295A61B5/026
Inventor 雷恒波孙明山邢晓曼徐雅洁郭友达莫境清徐品
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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