Heart rate analysis method and equipment based on millimeter wave radar

Abstract

The invention relates to a heart rate analysis method and equipment based on a millimeter wave radar. The method comprises the steps of: collecting heartbeat waveform data, including noise, of a front life body through a millimeter wave radar device; sampling and filtering the heartbeat waveform data; sampling the heartbeat waveform data subjected to filtering processing, and calculating time-frequency characteristics; creating a convolutional neural network, taking the time-frequency characteristics as input of the convolutional neural network, and outputting sample entropy of the heart rate and heartbeat waveform data; and determining the optimal heart rate monitoring position of the millimeter wave radar device through the sample entropy. According to the invention, heart rate measurement is accurate, and a user can be guided to correctly use the equipment.

Description

technical field [0001] The invention relates to the field of computers, in particular to a heart rate analysis method and equipment based on millimeter wave radar. Background technique [0002] Millimeter wave (mmWave) is a special radar technology that uses short-wavelength electromagnetic waves. Millimeter wave radar can emit signals with wavelengths on the order of millimeters. In the electromagnetic spectrum, such wavelengths are considered short wavelengths and are one of the advantages of the technology. Admittedly, the size of the system components (such as antennas) required to process mmWave signals is indeed small. Another advantage of short wavelengths is high accuracy. Millimeter-wave systems operating at frequencies of 76–81 GHz (corresponding to a wavelength of about 4 mm) will be able to detect movements as small as a few tenths of a millimeter. [0003] The breathing and heartbeat of the human body are a kind of mechanical movement in a macroscopic view. T...

AI Technical Summary

Problems solved by technology

[0005] (1) The sensitivity is not enough. The millimeter wave radar can detect the movement of a few tenths of a millimeter and the movement caused by the heartbeat is 0.1 to 0.5mm (chest), 0.01 to 0.2mm (back)

[0006] (2) There are many and strong interferences. For the detection of breathing and heart rate, the movement of the trunk and limbs of the human body is a strong interference. Talking and blinking are also strong interferences, as well as intestinal peristalsis and muscle shaking.

[0007] (3) Non-contact measurement has disadvantages. Non-contact measurement is originally the advantage of millimeter-wave radar, but non-contact measurement itself has disadvantages. The radar wave is emitted from the transmitting antenna and passes through a space to reach the object to be measured. After reflection, it passes through a space to reach the receiving antenna. The entire propagation process introduces various interferences, as well as the influence of reflectivity, reflection area, etc.

[0008] (4) Software and hardware technology is not yet mature

[0009] To solve the four difficulties of millimeter-wave radar monitoring respiratory heart rate, it is difficult to achieve purely by software or hardware

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