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Ultra-wide bandwidth radar type non-contact life parameter real-time monitoring system

A technology for real-time monitoring systems and life parameters, applied in radio wave measurement systems, measurement devices, and radio wave reflection/re-radiation, etc., can solve problems such as non-contact monitoring and limited penetration capability.

Inactive Publication Date: 2012-04-25
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with the application number 200680025633.1 uses point frequency continuous wave radar technology to develop a non-contact heart measurement and heart monitoring device, which can realize remote monitoring of the heartbeat of the subject, but its penetrating ability is limited, and it cannot detect other diseases such as breathing. Non-contact monitoring of physiological parameters

Method used

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  • Ultra-wide bandwidth radar type non-contact life parameter real-time monitoring system
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  • Ultra-wide bandwidth radar type non-contact life parameter real-time monitoring system

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Embodiment 1

[0035] The principle block diagram of the ultra-wide spectrum radar real-time monitoring system for vital parameters is as follows: figure 1 As shown, it includes a UWB radar front end, a wireless network, and a signal processing display unit 13 , and the UWB radar front end and the signal processing display unit 13 are connected through a wireless router 12 . The UWB radar front end includes a transmitting antenna, a receiving antenna, an encoder 3, an oscillator 2, a pulse generator 1, a delay circuit 4, a range gate generator 5, an integral sampler 6, an amplification filter circuit 7, an automatic gain Control circuit 8, frequency selection, signal separation circuit 9 and DSP (digital signal processing, Digital Signal Processing) 11; Described encoder 3 controls described oscillator 2 to generate pulse signal, and this pulse signal triggers pulse generator 1 to generate electromagnetic narrow pulse, and radiate out by the transmitting antenna; the reflected signal is sent...

Embodiment 2

[0043] Automatic gain control circuit 8: Due to the influence of various factors such as the reflection of electromagnetic waves on the surface of the medium and the propagation attenuation in the medium, the amplitude of the target signal received by the UWB radar is generally very weak, and with the increase of the distance from the radar Decays quickly. In order to compensate the attenuation of the signal, the system adopts the automatic gain control circuit 8 before A / D. The design of the automatic gain control circuit 8 adopts 8-stage secondary variable gain setting, and through two automatic variable gain settings, the target signal received by the radar is compensated and amplified, which improves the signal-to-noise ratio very well.

[0044] The specific method is: first, when the gain is 1, collect the echo signal for a certain period of time, obtain the background parameters, divide the monitoring distance into 8 sections on average, and generate 8 gain values ​​acco...

Embodiment 3

[0046] Frequency selection and signal separation circuit 9: the automatic gain control circuit 8 enables the signal to be further nonlinearly amplified, while limiting the amplification of strong signals; then the signal is sent to the frequency selection and signal separation circuit 9 for frequency selection, and the frequency selection and signal separation circuit 9 Including five band-pass hardware filters, respectively: 0.05~3.3Hz, 0.05~10Hz, 0.05~20Hz, 0.05~30Hz, 0.05~40Hz. After filtering out interference and noise, the signal-to-noise ratio of the signal is greatly improved, and a purer mixed signal (that is, the signal after frequency selection) is obtained. The signal after frequency selection enters the separation circuit in the frequency selection and signal separation circuit 9, and separates the mixed signal to form two signals of breathing and body movement. The two signals are sent to the A / D acquisition module for sampling through their respective output stage...

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Abstract

The invention discloses an ultra-wide bandwidth radar type non-contact life parameter real-time monitoring system which comprises a UWB (Ultra-Wide Bandwidth) radar front end and a signal processing display unit. The system can realize real-time and non-contact monitoring on physiological parameters of a human body, such as respiration, body movement signals, respiratory rate, and the like under the condition of penetrating through a thicker nonmetal obstacle. The ultra-wide bandwidth radar type non-contact life parameter real-time monitoring system is mainly used for the physiological parameter monitoring of patients which are not suitable for being connected with electrodes and a sensor in a ward, such as large-area burn patients, and the like, can be also used for carrying out non-contact real-time monitoring on buried wounded people (who can not be rescued in short time) in the disasters, such as earthquake, and the like and provides necessary reference for search and rescue staffs applying medical rescue to learn the vital sign condition of a rescued object at any time.

Description

technical field [0001] The invention relates to an ultra-wide spectrum radar type non-contact vital parameter real-time monitoring system, which belongs to the technical field of radar monitoring. Background technique [0002] Radar life detection technology is a kind of non-contact and long-distance detection of human life parameters (breathing, heartbeat, body movement, etc.) that can penetrate non-metallic media (brick walls, ruins, etc.) Emerging Technologies. [0003] The current radar-based life detection technology focuses on the detection and identification of human targets, and mainly solves the detection of the presence and location of human targets in the case of buried ruins or through walls, and is used to guide rescue. So far, it is rare to use radar technology to monitor (monitor) human physiological parameters. The Chinese patent with the application number 200680025633.1 uses point frequency continuous wave radar technology to develop a non-contact heart m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/08G01S13/88
Inventor 王健琪吕昊荆西京张杨焦腾于霄
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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