Non-contact vital sign monitoring method, device and system based on millimeter-wave radar

A technology of millimeter-wave radar and vital signs, which is applied to radio wave measurement systems, measurement devices, and electromagnetic wave detection, can solve the problems of inconvenient use and virus transmission, and achieve the effect of avoiding cross-infection of infectious diseases

Active Publication Date: 2019-10-18
长沙莫之比智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a non-contact vital sign monitoring method, device and system based on millimeter-wave radar, which is used to overcome the defec

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  • Non-contact vital sign monitoring method, device and system based on millimeter-wave radar
  • Non-contact vital sign monitoring method, device and system based on millimeter-wave radar

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Example Embodiment

[0029] Example one

[0030] As shown in the drawings, the embodiment of the present invention provides a non-contact vital signs monitoring method based on millimeter wave radar, which includes the following steps:

[0031] S1, extract the echo signal based on the reflection of the transmitted signal after encountering the target to be measured;

[0032] The transmitted signal here is sent by a millimeter wave radar. The target to be measured is for example a human body. Within the detectable range of the radar, the echo signal is the signal reflected after the transmitted signal encounters the human body (obstacle); it is received and buffered by the radar’s receiving antenna Data, here DSP can be extracted from the cache database.

[0033] S2, mixing the transmitted signal and the echo signal to generate a mixed signal;

[0034] The mixing signal is generated by the mixer.

[0035] S3, AD sampling the mixing signal to generate a time domain sampling signal;

[0036] S4: Perform range t...

Example Embodiment

[0073] Example two

[0074] Based on the first embodiment above, the embodiment of the present invention also provides a non-contact vital signs monitoring device based on millimeter wave radar, including a mixer, a processor, and a memory, and the memory stores a non-contact vital sign based on millimeter wave radar. The vital signs monitoring program executes the steps of the method in the first embodiment when the processor runs the program.

[0075] The invention is a non-contact type, does not require the user to contact or wear, has wider practicability, and can avoid the disease infection problem of contact monitoring; it is also convenient to monitor physical signs of people with mobility impairments; real-time monitoring, the invention belongs to the non-contact type The product can be installed above the bed or behind the seat of a long-distance driver to provide real-time target vital signs information to prevent accidents;

Example Embodiment

[0076] Example three

[0077] Based on the first and second embodiments above, the present invention also provides a non-contact vital signs monitoring system based on millimeter wave radar, including:

[0078] Millimeter-wave radio frequency front end, used to send out the transmission signal and receive the echo signal based on the reflection after the transmission signal encounters the target under test;

[0079] The monitoring device is electrically connected to the millimeter wave detector and is the non-contact vital signs monitoring device based on millimeter wave radar in the second embodiment;

[0080] Output interface: used to output the calculation results of the non-contact vital signs monitoring device based on millimeter wave radar;

[0081] The power supply is connected to the millimeter-wave radio frequency front end, the monitoring device, and the output interface for providing power.

[0082] The output interface is a serial interface.

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Abstract

The invention discloses a non-contact vital sign monitoring method, device and system based on a millimeter-wave radar. The method comprises the steps that an echo signal based on a transmitted signal, which is reflected after encountering a to-be-detected target, is extracted; the transmitted signal and the echo signal are mixed to generate a mixed signal; AD sampling is performed on the mixed signal to generate a time-domain sampled signal; distance transformation is performed on the time-domain sampled signal to acquire a one-dimensional distance image of the radar; a maximum peak value inthe one-dimensional distance image is acquired to obtain a target distance unit, and a phase on the target distance unit is calculated; the steps of distance transformation and phase calculation are repeated according to radar frame refreshing frequency, a phase set of phases on the same distance unit through respective calculation is obtained, and phase difference processing is performed to obtain a phase difference set; and the phase difference set is filtered to obtain vital sign signals of the to-be-detected target, and the vital sign signals are transformed to obtain vital signs. Throughthe non-contact vital sign monitoring method, device and system, the problems of inconvenience and infection brought by contact detection in the prior art are solved, non-contact measurement is realized, practicability and convenience are high, and contact infection is avoided.

Description

technical field [0001] The invention relates to the technical field of vital sign monitoring, in particular to a non-contact vital sign monitoring method, device and system based on millimeter wave radar. Background technique [0002] With the changes in the lifestyle of human society and the development of science and technology, and people's increasing attention to health issues, various electronic health products have gradually entered people's field of vision. [0003] Traditional vital sign detection products include watches, wristbands, oximeters, large medical equipment, etc. These electronic health products are all contact-type, requiring the user to wear or touch them to detect the user's vital sign information. Contact testing equipment is inconvenient for disabled patients, severely burned patients, or patients with limited mobility; at the same time, there are many concerns for patients with highly infectious diseases. Contents of the invention [0004] The pr...

Claims

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Application Information

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IPC IPC(8): G01S13/88G01V3/12
CPCG01S13/88G01V3/12
Inventor 陈浩文刘军辉郭利庚孙宇
Owner 长沙莫之比智能科技有限公司
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