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Method and device for generating time-frequency graph of signals

A time-frequency diagram and signal technology, applied in the field of biomedical signal processing, can solve the problem that the time-frequency diagram cannot display long-term analysis and short-term analysis at the same time.

Active Publication Date: 2018-10-16
EDAN INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides a method and device for generating a signal time-frequency diagram, aiming to solve the problem that the existing time-frequency diagram cannot simultaneously display long-term analysis and short-term analysis

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  • Method and device for generating time-frequency graph of signals
  • Method and device for generating time-frequency graph of signals

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Embodiment 1

[0030] figure 1 A flow chart of a method for generating a signal time-frequency diagram provided by the first embodiment of the present invention is shown, and the details are as follows:

[0031] In step S11, the original electrocardiographic data is obtained, and the RR interval signal is determined according to the original electrocardiographic data.

[0032] Optionally, the step S11 specifically includes:

[0033] A1. Continuously collect raw ECG data for a preset duration. Since it involves long-term time-frequency analysis, and the long-term time-frequency analysis is suitable for 24 hours, it is necessary to continuously collect ECG data for a long time (greater than or equal to 24 hours) as the original ECG data for analysis.

[0034] A2. Detect the feature points of the original ECG data, extract the R peak position and mark the heart beat type above the corresponding R peak position, and determine the RR interval signal according to the normal heart beat type.

[...

Embodiment 2

[0072] Figure 7 A structural diagram of an apparatus for generating a signal time-frequency diagram provided by the second embodiment of the present invention is shown, and for convenience of description, only parts related to the embodiment of the present invention are shown.

[0073] The device for generating the signal time-frequency diagram includes: an original ECG data acquisition unit 71 , a normal interval sequence acquisition unit 72 , a power spectrum calculation unit 73 , and a time-frequency diagram display unit 74 . in:

[0074] The original ECG data acquiring unit 71 is configured to acquire the original ECG data, and determine the RR interval signal according to the original ECG data.

[0075] Optionally, the raw ECG data acquisition unit 71 includes:

[0076] The raw ECG data continuous collection module is used to continuously collect raw ECG data with a preset duration. The duration of continuous collection should be greater than or equal to 24 hours.

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Abstract

The invention is applicable to the field of bio-medical signal processing, and provides a method and a device for generating time-frequency graph of signals. The method comprises the following steps:acquiring original electrocardiogram data, and confirming an RR interval signal in accordance with the original electrocardiogram data; removing an abnormal interval sequence in the RR interval signal, so as to obtain a normal interval sequence; calculating power spectrum of the normal interval sequence and segmenting the normal interval sequence, and calculating power spectrum of the segmented normal interval sequence. With the application of the method provided by the invention, a user can acquire more information within a same time, so that operating convenience of the user is greatly improved.

Description

technical field [0001] Embodiments of the present invention belong to the field of biomedical signal processing, and in particular relate to a method and device for generating a signal time-frequency diagram. Background technique [0002] The heart rate of a normal person is not constant, but is affected by factors such as the autonomic nervous system, and its changes are regulated by the sympathetic and parasympathetic nervous systems, and it also has a certain circadian rhythm. This change in sinus heart rate over time is called heart rate variability (Heart Rate Variability, HRV). [0003] HRV is an index used to characterize the degree of sinus arrhythmia, which can be obtained from the instantaneous heart rate or the change of heart rate from beat to beat (RR interval). Numerous studies have shown that heart rate increases when inhaling and slows when exhaling; use of vagus nerve blockers increases heart rate and increases vagal activity slows heart rate. HRV can be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0402A61B5/0456A61B5/352
CPCA61B5/72A61B5/7203A61B5/725A61B5/7253A61B5/316A61B5/352A61B5/318
Inventor 李兴美李叶平周峰
Owner EDAN INSTR