Human body sensing method and system based on millimeter wave radar

Abstract

The invention provides a human body sensing method and system based on millimeter wave radar. The method is based on a millimeter wave radar technology and comprises a step of extracting vital sign data. The step of extraction of the vital sign data comprises the following specific steps: step (1-1): dividing a sinusoidal signal transmitted by the millimeter wave radar into two paths by a power divider, allowing one path to transmit a frequency-modulated continuous pulse signal to a target on a plurality of transmitting antennas TX in a time division multiplexing mode, and receiving echo signals reflected by the target through a plurality of radar receivers RX so as to obtain multiple groups of echo signals; step (1-2), enabling the other path to enter a phase shifter in a radar radio frequency circuit, and performing frequency mixing on two paths of signals output by the phase shifter and the multiple groups of processed echo signals so as to obtain two paths of I / Q baseband signals; and step (1-3): demodulating the two paths of I / Q baseband signals, performing filtering and fast Fourier transform to obtain frequency values and peak values of breathing and heartbeat, and outputting breathing and heartbeat rates.

Description

technical field [0001] The invention belongs to the technical field of millimeter waves, and in particular relates to a human body sensing method and system based on millimeter wave radar. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the continuous development of social economy, people's material living standards have been greatly improved, and the pace of life has become faster and faster. In today's society with unprecedented improvement in information technology, more and more people are in a tense environment for a long time, their lives become hurried, and they lack exercise. The various diseases caused by this are increasing, among which sudden heart problems There are also more and more accidents caused, which makes more people pay attention to their own health problems. The human body perception system has very important ...

AI Technical Summary

Problems solved by technology

For non-contact monitoring methods based on pressure sensors, more sensitive piezoelectric films, optical fibers, etc. are used as sensor parts. This method has the advantage of not needing to undress, but this method requires high sensor accuracy, and often requires the patient to keep absolutely still, which limits the ability of the patient activities, which are inconvenient and uncomfortable

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