Automatic blood pressure measuring system

Abstract

The invention discloses a non-contact type automatic blood pressure measuring system. Blood pressure of a measured person is measured by video recording. The non-contact type automatic blood pressure measuring system comprises a video acquiring module, an ROI extracting module, a pulse wave signal generating module, a filtering and noise reduction module, a waveform analyzing module and a blood pressure value calculating module. An automatic blood pressure measuring method comprises the following steps of acquiring a video of a finger tip; positioning the position of a tracked finger by using contour tracing of the finger tip; acquiring images of the finger; performing primary color separation and ROI segmentation on the images of the finger; respectively taking all pixel mean values of the filtered images as feature values to generate two time-varying pulse wave signal waveforms; performing comparison analysis on the two pulse wave waveforms to obtain transmission time of pulse; calculating the wave velocity of the pulse waves along an artery according to an image center distance d; and calculating a blood pressure value by using a conversion relation between pulse wave velocity and blood pressure. By using a noninvasive and non-contact type remote physiological signal detecting method, interference of motion artifact in a video record is overcome, the measuring precision is high, and blood pressure of a plurality of persons can be measured simultaneously.

Description

technical field [0001] The invention relates to the technical field of blood pressure measurement, in particular to an automatic blood pressure measurement system and method. Background technique [0002] The traditional human arterial blood pressure measurement must have physical contact with the subject. For example, the indirect measurement method of human arterial blood pressure is usually used. The measurement method invented by Russian physician N. Korotkov, the device includes an inflatable cuff and a Tie the cuff to the upper arm of the subject, and then inflate until the blood flow of the brachial artery is blocked, and slowly release the air in the cuff, and use the stethoscope placed on the brachial artery to hear the current The cuff pressure is just lower than the blood pressure of the brachial artery. The vibration sound caused by the turbulent flow (Korotkov's sound, referred to as the Korotkoff sound) generated when the blood flow rushes through the compresse...

AI Technical Summary

Problems solved by technology

However, wearing the detection device for a long time may cause people's emotional changes and physical discomfort

[0003] In addition, people's blood pressure is not constant throughout the day, but is prone to large changes with changes in the environment and mood, especially for hypertensive patients or the elderly, if the blood pressure changes suddenly, serious life-threatening

However, there is no convenient and practical blood pressure measuring instrument in the world at present, so that the measured person can obtain the blood pressure value accurately and in real time without any physical discomfort caused by the measurement.

[0004] In addition, blood pressure has a very close relationship with people's physical health, but because human blood pressure itself is not stable, a single blood pressure measurement is not accurate for judging physical health

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