Multi-target heart rate and breath measuring method and system matched with different radar bandwidths

Abstract

The invention relates to the technical field of signal processing. The invention aims to provide a multi-target heart rate and breath measuring method and system matched with different radar bandwidths. Therefore, accurate non-contact measurement of heart rates and breath of a plurality of target human bodies is realized. According to the technical scheme, the method comprises the following stepsof: transmitting an electromagnetic wave signal to a to-be-measured space through a radar transmitter configured as a first bandwidth, and processing a received first echo signal reflected by each target human body to obtain position information of each target human body in the to-be-measured space; configuring a radar transmitter as a second bandwidth, and performing radar beam forming accordingto the position direction of each target human body in the to-be-measured space; processing second echo signals to obtain an echo sequence of each target human body; and obtaining breath characteristic signals and heart rate characteristic signals from the echo sequence, and performing noise reduction and fast Fourier transform on the two types of characteristic signals to restore breath and heartbeat motion information. According to the invention, the accuracy of breath and heartbeat measurement is improved.

Description

Technical field [0001] The present invention relates to the field of signal processing technology, and specifically to a multi-target heart rate and respiration measurement method and system that match different radar bandwidths. Background technique [0002] Heart rate and respiration are important physiological indicators for doctors to diagnose and treat arrhythmia, heart rate variability, cardiopulmonary abnormalities and other related diseases. Common heart rate measurement methods use contact methods, such as pressure sensors, pulse wave sensors, electrocardiograms, etc. Contact measurement methods are prone to secondary injuries to patients with large-area burns and scalds. With the advancement of science and technology, non-contact measurement methods based on ultra-wideband radar can complement these applications and have broad prospects. [0003] In the application of existing ultra-wideband technology radar in respiration and heart rate, it is mainly measured fo...

AI Technical Summary

Problems solved by technology

At present, the indoor application environment is often more than a single individual, and the accuracy of the heart rate and respiration measurement scheme for multiple individuals is also limited. It is necessary to provide a scheme that can more accurately identify the calculation method of human heart rate and respiration for multiple targets.

[0004] Application publication number CN110464320A proposes a multi-target human heart rate and respiration frequency measurement system and method, which discloses the measurement of heart rate and respiration by processing the echo signals reflected back from multiple target human bodies in the space to be measured. Although this method can measure the human heart rate and respiration of multiple targets to a certain extent, because there are multiple target human bodies in the space to be measured, when measuring a certain target human body, it may be affected by the signals reflected by other target human bodies , resulting in inaccurate measurement results

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