Non-contact heart rate variability monitoring method based on frequency modulated continuous wave radar
A technology of heart rate variability and frequency modulation continuous wave, which is applied in the fields of climate sustainability, pulse rate/heart rate measurement, diagnostic recording/measurement, etc. It can solve the problems of being easily disturbed by environmental factors, low measurement accuracy, and limited use conditions, etc. problem, to achieve the effect of low power consumption, high measurement accuracy and strong anti-interference ability
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[0127] In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.
[0128] In this embodiment, a non-contact heart rate variability monitoring method based on frequency-modulated continuous wave radar is proposed, and the details are as follows:
[0129] S1 transmits periodic chirp waves to the area where the monitoring object is located, and uses the antenna to collect the corresponding echo signals. The linear frequency modulation range of the transmitted chirp wave is 77-81GHz, and the duration of a single pulse is 50us; the sampling frequency of the fast time axis is 4MHz, and the number of sampling points is 128; the sampling frequency of the slow time axis is 100Hz.
[0130] S2 uses frequency mixing and FFT to preprocess the radar echo signal, and the mixing output is an intermediate frequency ...
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