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Heartbeat detection method and system based on millimeter wave signal

A heartbeat detection, millimeter wave technology, applied in the field of heartbeat perception, can solve the problems of heart rate detection results, high millimeter wave signal, rough heart rate information, etc., to improve accuracy and robustness, improve accuracy, and optimize results. Effect

Pending Publication Date: 2022-01-04
ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high sensitivity of millimeter wave signals, other user behaviors and environmental interference will affect the heart rate detection results
However, the current millimeter-wave radar heart rate detection technology can only obtain rough heart rate information in a relatively static environment.

Method used

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  • Heartbeat detection method and system based on millimeter wave signal
  • Heartbeat detection method and system based on millimeter wave signal
  • Heartbeat detection method and system based on millimeter wave signal

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Embodiment Construction

[0024] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to manufacture and use the contents of this specification. Various local modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and embodiments without departing from the spirit and scope of the description. application. Accordingly, the description is not limited to the embodiments shown, but is to be accorded the widest scope consistent with the claims.

[0025] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. For example, as used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. When used in this specification, the terms "comprisin...

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Abstract

According to the heartbeat detection method and system based on the millimeter wave signal, the millimeter wave sensor is used for transmitting the continuous frequency modulation wave signal to the target user and receiving the echo signal to obtain the intermediate frequency signal, and the phase signal is extracted from the intermediate frequency signal; and the micro vibration of the thoracic cavity of the target user caused by heartbeat movement is captured by using the phase signal. The method and the system can perform at least one modal decomposition on the phase signal based on the hierarchical variational modal decomposition model to remove the influence of the interference signal on the heartbeat signal so as to obtain fine-grained heartbeat information. The input signal of each variational mode decomposition is the output signal of the previous variational mode decomposition. In the process of each variational mode decomposition, the method and the system calculate the corresponding initial parameter based on the input signal of the current variational mode decomposition, so that the optimization result is more accurate, the convergence speed is higher, the precision of variational mode decomposition is improved, and the precision of heart rate detection is further improved.

Description

technical field [0001] This specification relates to the technical field of heartbeat sensing, and in particular to a method and system for heartbeat detection based on millimeter wave signals. Background technique [0002] As a key heartbeat, heart rate is an important indicator of people's health, and changes in heart rate can reflect the health of the heart and lungs. With the improvement of people's living standards, the demand for non-contact health testing is also increasing. Millimeter-wave radar has the advantages of simple structure, low cost, low power consumption, high distance resolution and high speed resolution, and can detect millimeter-level micro-motion signals. It is widely used in the detection of vital signals (breathing and heartbeat signals). detection. Due to the high sensitivity of millimeter wave signals, other user behaviors and environmental interference will affect the heart rate detection results. However, the current millimeter-wave radar hea...

Claims

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Application Information

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IPC IPC(8): G01S13/88G01S7/40A61B5/024A61B5/0507
CPCG01S13/88G01S7/4056A61B5/024A61B5/0507
Inventor 李默马晨光续立军李亮俞嘉地徐翔宇
Owner ALIPAY (HANGZHOU) INFORMATION TECH CO LTD