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Achieving method of heart sound signal generator

A realization method and technology of heart sounds, applied in the field of realization of heart sound signal generators, can solve problems such as inconvenience for patients, difficulties for teachers, difficulty for students to learn heart auscultation, etc., and achieve the effect of simple realization and easy parameter adjustment

Inactive Publication Date: 2012-07-04
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In the past, cardiac auscultation was mainly carried out by the bedside. It was difficult for teachers to find typical heart sounds. Many students surrounded patients, which not only brought inconvenience to patients, but also caused poor auscultation results. Students generally felt that cardiac auscultation was very difficult to learn.

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  • Achieving method of heart sound signal generator
  • Achieving method of heart sound signal generator
  • Achieving method of heart sound signal generator

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Embodiment Construction

[0015] Since S3 and S4 in the heart sound sampling signal are relatively weak, they are generally not heard or seen. For the convenience of explaining the principle, only the heart sound signal including S1, S2 and noise (generated by the external environment and hardware work) is considered here. But the principle of adding S3, S4 and heart murmur is the same as S1 and S2.

[0016] First, select a period of heart sound signal from the heart sound sampling signal as the standard heart sound signal, as shown in the attached figure 1 As shown in (a), and select the S1 part as the benchmark of the first heart sound of the signal generator, as shown in the attached figure 1 As shown in (b), get the S2 part as the benchmark of the second heart sound of the heart sound signal generator, as attached figure 1 As shown in (c), take the points in the interval from S1 to S2 as the benchmark of the noise of the heart sound signal generator, as shown in the attached figure 1 (d) shown. ...

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Abstract

The invention provides an achieving method of a heart sound signal generator. Firstly a one-period standard heart sound signal is decomposed into a first heart sound s1, a second heart sound s2, a third heart sound s3, a fourth heart sound s4, heart sound interval spacing interval delta txy and noise sN, secondly relevant parameters of the six parts are extracted to form a set of a standard formwork, the relevant parameters are adjusted according to requirements of users during use, the standard formwork is correspondingly changed to be a user formwork, and the heart sound signal needed by the users are constructed. Normal heart sound and pathological abnormal heart sound can both be processed as the standard heart sound signal. The heart sound signal is conducted subsection process, changes of each parameter can be easily and respectively controlled, the formwork is in a linear mode, each portion is adjusted according to the changes of each parameter on the basis of the formwork, and the users cannot be worried about incorrect signal contents or the fact that heart sound is unlike the actual heart sound. The achieving method is simple to achieve, easy in parameter adjustment and real.

Description

technical field [0001] The invention relates to a method for realizing a heart sound signal. In particular, it is an implementation method of a heart sound signal generator designed by using LabVIEW (laboratory virtual instrument engineering workbench) and Matlab (matrix laboratory mathematical calculation software) mixed programming technology. Background technique [0002] Heart sound is a very important physiological signal in the human body. Cardiac auscultation is an important method for heart disease and the focus of medical teaching, but it is also difficult. In the past, cardiac auscultation was mainly carried out at the bedside. It was difficult for teachers to find typical heart sounds. Many students surrounded patients, which not only brought inconvenience to patients, but also had poor auscultation effects. Students generally felt that cardiac auscultation was very difficult to learn. [0003] Based on the virtual instrument technology and adopting the technica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B9/00
Inventor 陶冶薇成谢锋吴健何树洋葛彦平黄艳红
Owner NANJING UNIV OF POSTS & TELECOMM
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