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Remote life micro-motion signal detection method based on terahertz Doppler radar

A signal detection, long-distance technology, applied in the measurement of pulse rate/heart rate, diagnostic recording/measurement, medical science, etc., can solve the problems of insensitive micro-motion signal, complex system structure, etc., to improve the signal-to-noise ratio, high precision The effect of parameter estimation

Active Publication Date: 2019-05-28
CHINA ELECTRONIS TECH INSTR CO LTD
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Problems solved by technology

At present, most non-contact physiological parameter extraction methods are based on microwave and low-frequency millimeter wave bands, which are not sensitive to micro-movement signals such as heartbeat, and require complex system structures in the process of physiological parameter extraction

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  • Remote life micro-motion signal detection method based on terahertz Doppler radar
  • Remote life micro-motion signal detection method based on terahertz Doppler radar
  • Remote life micro-motion signal detection method based on terahertz Doppler radar

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Embodiment Construction

[0079] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0080] Such as figure 1 and figure 2 As shown, the long-distance life micro-motion signal detection method based on terahertz Doppler radar includes the following steps:

[0081] Step ①: Receive the four-way living body reflection echo signals (2 pairs of I / Q) in real time through the terahertz Doppler radar, and digitize the four-way living body reflection echo signals through a multi-channel digitizer, marked as I 1 , Q 1 , I 2 with Q 2 , stored in the computer;

[0082] Step ②: Suppress the static clutter in the reflected echo signals of the four-way living body;

[0083] Step ③: Suppress the linear trend item in the four-way living body reflection echo signal that filters out the static clutter;

[0084] Step ④: Perform complex signal demodulation on the four-channel signals after filtering out static clutter an...

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Abstract

The invention discloses a remote life micro-motion signal detecting method based on a terahertz Doppler radar, and particularly relates to the technical field of life micro-motion signal detection. The method comprises the steps of receiving four living body reflection echo signals in real time by the terahertz Doppler radar, and digitizing the four living body reflection echo signals by a multi-channel digitizer; suppressing static clutters in the four living body reflection echo signals; suppressing linear trend terms in the four static-clutter-free living body reflection echo signals; performing treatment such as complex signal demodulation on the four signals subjected to static clutter filtering and linear trend suppressing respectively, and processing results through set empirical mode decomposition to acquire a reconstructed vital sign signal; performing Fourier transform on the reconstructed vital sign signal to obtain a signal spectrum; suppressing a harmonic component, and taking peaks in the spectrum subjected to in-band harmonic suppression as estimated values of respiratory rate and heart rate respectively.

Description

technical field [0001] The invention relates to the technical field of life micro-motion signal detection, in particular to a long-distance life micro-motion signal detection method based on terahertz Doppler radar. Background technique [0002] The extraction of physiological parameters such as respiratory rate and heart rate of living organisms has a wide range of application values. In modern medicine, the extraction of biological parameters such as respiratory rate and heart rate is of great significance for monitoring the sleep quality of patients, preventing and diagnosing respiratory and cardiovascular diseases. Accurate estimation of physiological parameters can provide a reliable basis for doctors to diagnose and treat related diseases. In engineering, the extraction of physiological parameters can provide an effective basis for rescue activities when natural disasters such as earthquakes occur, thereby reducing the loss of human life and property. [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/05A61B5/113A61B5/024A61B5/00
CPCY02A90/10
Inventor 梁晓林邓建钦王沫朱翔
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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