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Gabor transformation based method and device for extracting and analyzing breathing and heartbeat signals

A technology of heartbeat signal and Gabor transform, which is applied in the field of biomedical signal processing, can solve problems such as the inability to extract breathing and heartbeat frequency, and the inability to provide joint distribution information in the time domain and frequency domain, so as to improve the efficiency of signal processing

Inactive Publication Date: 2016-09-07
BEIJING QUALITY & ZEAL INFORMATION TECH CO LTD
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Problems solved by technology

[0003] In practice, the human body echo received by the bio-radar is modulated by the micro-movement of the body surface caused by life activities such as breathing and heartbeat, which is embodied in the micro-Doppler frequency that changes with time, while the traditional Fourier transform-based Signal analysis methods cannot provide joint distribution information in the time domain and frequency domain, and thus cannot extract respiration and heartbeat rates over time

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  • Gabor transformation based method and device for extracting and analyzing breathing and heartbeat signals
  • Gabor transformation based method and device for extracting and analyzing breathing and heartbeat signals
  • Gabor transformation based method and device for extracting and analyzing breathing and heartbeat signals

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Embodiment Construction

[0037] Hereinafter, embodiments of the present invention will be described in detail in conjunction with the accompanying drawings, but they are not intended to limit the present invention.

[0038] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0039] The present invention provides a method and device for extracting and analyzing breathing and heartbeat signals based on Gabor Transform. Therefore, before introducing the details of the implementation of the pr...

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Abstract

The invention provides a Gabor transformation based method and device for extracting and analyzing breathing and heartbeat signals. The method comprises following steps: S1, radar echo signals are subjected to Gabor transformation, and time-frequency power distribution signals of the transformed signals are calculated; S2, the time-frequency power distribution signals are subjected to frequency spectrum weighted average operation, and a frequency spectrum centroid changing curve is obtained; S3, the frequency spectrum centroid changing curve is subjected to filtering operation, and breathing signals and heartbeat signals are obtained; S4, the breathing signals and the heartbeat signals are subjected to the Gabor transformation, and breathing frequency changing with time and heartbeat frequency changing with the time are obtained. With the adoption of the method and the device, the breathing frequency and heartbeat frequency changing with time, the signals and the frequency change of the signals can be effectively extracted.

Description

technical field [0001] The invention relates to the field of biomedical signal processing, in particular to a method and device for extracting and analyzing breathing and heartbeat signals based on Gabor transformation. Background technique [0002] Bio-radar is a medical device that can non-contact measure vital parameters such as human breathing and heartbeat by transmitting and receiving microwave or terahertz waves. Bio-radar can replace traditional contact measurement equipment such as electrocardiogram and respiratory belt, except It can be used not only for disease diagnosis, but also for real-time monitoring of human health status, so it has become a hot research topic at home and abroad. [0003] In practice, the human body echo received by the bio-radar is modulated by the micro-movement of the body surface caused by life activities such as breathing and heartbeat, which is embodied in the micro-Doppler frequency that changes with time, while the traditional Fourie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0205A61B5/00
CPCA61B5/0205A61B5/024A61B5/0507A61B5/0816A61B5/7225A61B5/725A61B5/7253A61B5/7271
Inventor 黄亦谦
Owner BEIJING QUALITY & ZEAL INFORMATION TECH CO LTD
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