Heart rate based on microwave sensing and heart rate variability monitoring method

A technology of heart rate monitoring and microwave, which is applied in measuring pulse rate/heart rate, sensor, diagnostic recording/measurement, etc. It can solve problems such as insufficient spectrum resolution, heart rate monitoring respiratory harmonic interference, weak heartbeat signal, etc., and achieves simple calculation, High precision heart rate monitoring, high reliability effect

Active Publication Date: 2019-10-15
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is the problems such as susceptibility to respiratory harmonic interference, weak heartbeat signal and insufficient spectral resolution in heart rate monitoring.

Method used

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  • Heart rate based on microwave sensing and heart rate variability monitoring method
  • Heart rate based on microwave sensing and heart rate variability monitoring method
  • Heart rate based on microwave sensing and heart rate variability monitoring method

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Embodiment 1

[0043] This embodiment is a heart rate monitoring method based on microwave sensing, the process is as follows figure 1 shown. Specifically include the following steps:

[0044] Step 1. Extract the displacement time series x(i) of chest wall undulating motion based on the interferometry method, i=1, 2, . . . N. x(i), i=1, 2,...N is the discrete time series of chest wall undulating movement displacement x(t), and x(t) is calculated by the following formula:

[0045]

[0046] Among them, t is the time; λ is the carrier wavelength; θ(t) is the phase of the baseband signal at time t. The displacement time series x(i) is the discrete value of x(t) at time t=iΔt, and Δt is the sampling interval time.

[0047] For example, in vital signs monitoring based on FMCW microwave radar, the time series of chest wall heave motion displacement is extracted by estimating the phase change across multiple frequency sweep periods. In this embodiment, the time-domain waveform diagram of ches...

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Abstract

The invention discloses a heart rate monitoring method based on microwave sensing. A heartbeat component signal is enhanced through differential, and is processed through a band-pass filter; by utilizing the amplified heartbeat component signal, specially harmonic components of heartbeating at the second time and the third time; and through combination of self-correlation periodic analysis method,the problems of harmonic interference of breathing and covering are solved, high-reliability and high-accuracy heart rate monitoring can be realized, the tracking sensitivity is high and the calculation is more convenient.

Description

technical field [0001] The invention relates to the field of vital sign monitoring, in particular to a microwave sensing-based heart rate monitoring method. Background technique [0002] Vital sign monitoring is an important means to realize biomedical applications such as health care, sleep quality and stress assessment, and heart rate monitoring is an important part of vital sign monitoring. Heart rate refers to the average number of heartbeats per minute. At present, heart rate is often monitored clinically based on electrocardiogram (ECG), which requires wearing multiple sensors, which is costly, cumbersome and inconvenient to use. [0003] In recent years, the vital sign monitoring technology and method based on single-frequency continuous wave (CW) and frequency-modulation continuous wave (FMCW) microwave radar can realize non-contact monitoring of breathing and heartbeat frequency. . Heart rate monitoring based on CW radar mainly uses the radar I / Q (in-phase / quadrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024A61B5/113A61B5/00
CPCA61B5/024A61B5/0507A61B5/1135A61B5/721A61B5/7235A61B5/7257
Inventor 熊玉勇彭志科李松旭王冬
Owner SHANGHAI JIAO TONG UNIV
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