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Omnidirectional biological radar-based two-dimensional CA-CFAR (cell average-constant false-alarm rate) human body random motion detection method

A CA-CFAR, bio-radar technology, used in electromagnetic wave detection, radio wave measurement systems, instruments, etc.

Active Publication Date: 2016-10-12
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing search and rescue bio-radar technology mainly detects and recognizes vital signs such as human breathing and heartbeat to judge whether there is a surviving target, but there is no research on using random human body movement to judge the surviving target when there is interference from moving targets outdoors. see the report

Method used

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  • Omnidirectional biological radar-based two-dimensional CA-CFAR (cell average-constant false-alarm rate) human body random motion detection method
  • Omnidirectional biological radar-based two-dimensional CA-CFAR (cell average-constant false-alarm rate) human body random motion detection method
  • Omnidirectional biological radar-based two-dimensional CA-CFAR (cell average-constant false-alarm rate) human body random motion detection method

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Embodiment

[0079] Adopt the method of the present invention, utilize the bioradar detection experiment that human body target random body moves and select K 1 = K 2 =1.7 to evaluate the effectiveness of this method. According to the relative position of the human body and the radar, it is mainly divided into the following three situations:

[0080] Figure 9 is the original signal and its processing result when the abdomen of the human body is facing the direction of the main lobe of radar A. Such as Figure 9 As shown in (a), since the radar A antenna is covered by the human body, the moving target interference is very small, and a clear breathing waveform can be seen. The radar B, C, and D antennas are not covered by the human body, and the moving target interference is very strong. Due to the shaking of the measured object, the Radar A signal changed drastically around 60s and 120s. The random body motion recognition algorithm recognizes body motion around 60s and 120s of the rad...

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Abstract

The invention discloses an omnidirectional biological radar-based two-dimensional CA-CFAR (cell average-constant false-alarm rate) human body random motion detection method. According to the method, a biological radar is utilized to detect human body random motion in a strong moving target interference environment, so that the detection and recognition of surviving targets can be realized, so that a new idea can be provided for radar detection for surviving targets; and with an intra-channel reference background and an environment reference background adopted as the two-dimensional threshold value of the two-dimensional CA-CFAR technique, comprehensive analysis and judgment are carried out on the signals of the four-channel biological radar, so that accurate detection and recognition of human body random motion under outdoor moving target interference such as the blowing of wind and the movement of grasses can be realized, and the requirements of the life detection radar for search and rescue environments can be effectively reduced, and search and rescue efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of biological radar or radar life detection, and relates to a two-dimensional CA-CFAR human body random motion detection method based on omnidirectional biological radar. Background technique [0002] Bio-radar is a new concept radar for the purpose of detecting living organisms. It integrates radar, biomedical engineering, computer and other technologies, and can penetrate non-metallic media (brick walls, ruins, etc.), long-distance, non-contact detection and Recognition of vital signs has been widely used in anti-terrorism, post-disaster search and rescue and other occasions, and plays an important role in protecting the lives of the people. [0003] However, in actual detection environments such as nuclear and chemical leakage, search and rescue at explosion sites, and detection of pilots’ emergency landing life activities, survivors’ heads or feet may be directly facing radar waves, and there may be inte...

Claims

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Application Information

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IPC IPC(8): G01V3/12G01S7/41
CPCG01S7/414G01S7/415G01V3/12
Inventor 祁富贵王健琪李川涛荆西京于霄路国华梁福来王帅杰
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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