Calculation method of heart rate based on heart sounds

A calculation method and heart sound technology, applied in the measurement of pulse rate/heart rate, diagnosis signal processing, etc., can solve the problems of complex discrimination, disappearance of heart sound signal, and changeable shape of heart sound signal, and achieve good real-time performance, reliable heart rate results, and reduced The effect of R&D costs

Active Publication Date: 2021-03-30
HONSUN NANTONG
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Problems solved by technology

[0004] Normally, S 1 , S 2 The position where the amplitude is the largest, but due to individual differences, some heart sound signals may appear S 2 In addition, the noise amplitude introduced during the acquisition process is usually almost the same as the heart sound signal, which makes the shape of the heart sound signal changeable and the discrimination is complicated. It is difficult to obtain the heart rate quickly, stably and accurately in the existing technology.

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  • Calculation method of heart rate based on heart sounds

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[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0030] Generally, by using an electro...

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Abstract

A method for calculating heart rate on the basis of heart sounds, the method comprising: obtaining a real-time heart sound signal and processing a waveform of the heart sound signal so as to form a calculable characteristic waveform; detecting a time interval T between two adjacent peaks and calculating an instantaneous heart rate value; sequentially calculating an arithmetic mean value of instantaneous heart rate values according to every five consecutive beats; using a systematic estimation method on the arithmetic mean value to obtain a corresponding estimated value; and performing misjudgment prevention processing on the calculated value and the estimated value. On the premise of detecting heart rate accuracy, the described method has a small amount of calculation, low complexity and good real-time performance, and is suitable for calculation on the basis of embedded chips, which may reduce the costs of product development for enterprises; a Kalman estimation equation is used in data processing so that the final result may be free from the influence of signal-to-noise ratio and human and environmental interference, and stable and reliable heart rate results may be obtained.

Description

technical field [0001] The invention relates to the field of medical and health technologies, in particular to a heart sound-based heart rate calculation method. Background technique [0002] Heart rate refers to the number of heartbeats per minute of a normal person in a quiet state, generally 60 to 100 beats per minute. It is an important physiological indicator that reflects the health of a person. The sound produced by the mechanical vibration caused by the blood flow hitting the wall of the ventricle, the wall of the aorta, etc. [0003] A cardiac cycle can produce 4 heart sounds: the first (S 1 ), the second (S 2 ), third (S 3 ), fourth (S 4 ) heart sound. Usually only the first and second heart sounds can be heard by auscultation. A cardiac cycle is defined as two consecutive S 1 The heart rate calculation is based on the location of the cardiac cycle. [0004] Normally, S 1 , S 2 The position where the amplitude is the largest, but due to individual differe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/024
CPCA61B5/024A61B5/72
Inventor 黄真江
Owner HONSUN NANTONG
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