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Multi-human-body target recognition and positioning method based on multi-base IR-UWB biological radar signals

A bio-radar, identification and positioning technology, used in the reflection/re-radiation of radio waves, instruments, measuring devices, etc., can solve the problem of lack of multi-human target identification and positioning

Active Publication Date: 2020-03-13
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-base IR-UWB bio-radar signal-based multi-human target identification and positioning method to solve the lack of recognition and positioning of multi-human targets achieved by bio-radar in the prior art

Method used

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  • Multi-human-body target recognition and positioning method based on multi-base IR-UWB biological radar signals
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  • Multi-human-body target recognition and positioning method based on multi-base IR-UWB biological radar signals

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Embodiment 1

[0080] This embodiment discloses a multi-base IR-UWB biological radar signal-based multi-human target identification and positioning method, including the following steps:

[0081] Step 1: The transmitting antenna of the three-channel IR-UWB biological radar transmits radar pulses to the target position. The three channels include the middle channel, the left channel and the right channel. The radar pulses are reflected at the target position and passed through the three-channel IR-UWB The three receiving antennas of the biological radar obtain the radar echo signal E(m,n) of the middle channel and the radar echo signal E(m,n) of the left channel. left (m,n) and the right channel radar echo signal E right (m,n), where m is the sampling sequence number in the fast time direction, n is the sampling sequence number in the slow time direction, and m and n are positive integers;

[0082] Step 2: E(m,n) and E obtained in step 1 left (m,n) and E right (m,n) get the intermediate ch...

Embodiment 2

[0185] This embodiment adopts the multi-human target recognition and positioning method and the three-channel IR-UWB biological radar. On the basis of Embodiment 1, the following technical features are also disclosed, and the wall-penetrating detection and positioning verification experiment is carried out in the laboratory. The experimental subjects are three healthy young males (Target 1, Target 2 and Target 3) to conduct detection experiments under the condition of penetrating a single brick wall, and the results of target number discrimination and positioning are given. Among them, target 1 is standing still at the right side 2.3 meters away from the wall; target 2 is standing still at the left side at 5.7 meters behind the wall; target 3 is standing still at the central axis direction at 7.8 meters behind the wall.

[0186] After using the three-channel IR-UWB biological radar to detect through the wall, the radar echo signals of the three channels are processed and calcul...

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Abstract

The invention belongs to the technical field of biological radar, and discloses a multi-human-body target recognition and positioning method based on multi-base IR-UWB biological radar signals. The method is based on a one-transmitting three-receiving three-channel biological radar. Echo signals are subjected to preprocessing and inflection point extraction, secondary inflection point signals of three channels and the first three largest values of the secondary inflection point signals are obtained, the peak-background ratio and the correlation coefficient mean value of the first three largestvalues are calculated, and recognition and positioning of multiple human body targets are achieved through judgment of the peak-background ratio and the correlation coefficient mean value of the three largest values. According to signal characteristics of human respiration and the like, a set of target discrimination program combining two characteristic parameters of an energy-to-noise ratio anda correlation coefficient mean value is adopted, recognition and distance direction positioning of multiple human targets are realized, and the target recognition accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of biological radar, and in particular relates to a method for identifying and locating multi-human targets based on multi-base IR-UWB biological radar signals. Background technique [0002] Bio-radar is a technology that extracts signals related to vital signs from radar echoes, non-contact, long-distance, and can penetrate a certain medium to realize the functions of life detection, vital sign monitoring, life imaging and positioning. The principle is that the radar emits electromagnetic waves to the human body. The electromagnetic waves are modulated by human physiological activities such as breathing, heartbeat, and body movement, and then reflected back to the radar receiving antenna. Physiological and biological information, including physiological parameters, waveforms, images, target locations, etc. Because of the above advantages, bio-radar technology has shown great advantages and broad applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88
CPCG01S13/88
Inventor 张杨王健琪张自启梁福来吕昊李钊于霄薛慧君安强
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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