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Method for identifying and one-dimensionally positioning multiple human body targets by using single-channel UWB-based radar life detection instrument

A life detector and human body target technology, which is applied in the field of non-contact life parameter detection, and can solve problems such as identification and positioning of multiple stationary human body targets that have not yet been solved.

Inactive Publication Date: 2011-04-20
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recognition and localization of multiple stationary human targets has not been addressed in the field so far

Method used

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  • Method for identifying and one-dimensionally positioning multiple human body targets by using single-channel UWB-based radar life detection instrument
  • Method for identifying and one-dimensionally positioning multiple human body targets by using single-channel UWB-based radar life detection instrument
  • Method for identifying and one-dimensionally positioning multiple human body targets by using single-channel UWB-based radar life detection instrument

Examples

Experimental program
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Effect test

Embodiment 1

[0028] This embodiment provides a single-channel ultra-broadband radar type life detector, figure 1 It is a schematic block diagram of a single-channel ultra-wide-spectrum radar life detector system. First, the pulse oscillator generates a pulse signal, which triggers the electromagnetic pulse generator to generate a narrow pulse, which is radiated through the transmitting antenna. The reflected signal is sent to the sampling integrator through the receiving antenna, and the signal generated by the pulse oscillator passes through the delay circuit to generate a range gate to select the received signal. The signal passes through the sampling integration circuit, and after thousands of pulses are accumulated, the weak signal It is detected, amplified and filtered, and then sent to the computing unit after being sampled by a high-speed acquisition card. The computing unit analyzes, processes and recognizes the collected signal, and finally calculates the target distance.

[0029...

Embodiment 2

[0037] This embodiment provides single-channel ultra-wide spectrum radar life detector parameter index:

[0038] The relevant parameters of the antenna and transceiver system of the system are as follows:

[0039] (1) The antenna is: dielectric coupling shielding type;

[0040] (2) Number of antennas: 1 transmitting antenna, 1 receiving antenna;

[0041] (3) Center frequency of transceiver antenna: 500MHz;

[0042] (4) Bandwidth: 500MHz;

[0043] (5) Time window: adjustable from 4 to 5000 ns;

Embodiment 3

[0045] Static target weak signal enhancement:

[0046] To realize the recognition of stationary human targets, the weak life signals of stationary human bodies should be enhanced first. In this embodiment, according to the characteristics of the UWB radar echo signal, the weak biomedical signal processing method is used to process the signal after high-speed sampling and enhance the useful signal to improve the signal-to-noise ratio and realize the basic recognition of human targets.

[0047] Use 8-point 4-point integration method to integrate the signal in the distance; then break up the signal for decomposition and reconstruction, and synthesize the target echo signal and distance signal; digitally filter and digitally differentiate the target echo signal to achieve Enhancement of weak useful signals.

[0048] 3.1 Integration of signals

[0049] The sampling rate of the high-speed acquisition card used in this embodiment is 64Hz, and the amount of data sampled by AD is large...

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Abstract

The invention discloses a method for identifying and one-dimensionally positioning multiple human body targets by using a single-channel ultra wideband-based (UWB) radar life detection instrument, which comprises the following steps of: A1, enhancing weak life signals of static human bodies, namely integrating the signals in the aspect of distance by a method for integrating 8 points at intervals of 4 points, scattering the signals, decomposing and reconfiguring to synthesize a target echo signal and a distance signal, and performing digital filtering and digital differentiation on the target echo signal to enhance weak useful signals; and A2, distinguishing a one-dimensional distance, namely analyzing spatial frequency according to the target echo signal subjected to digital filtering and digital differentiation and the distance signal to obtain the target one-dimensional distance.

Description

technical field [0001] The invention relates to the technical field of non-contact life parameter detection, in particular to a single-channel UWB-based radar life detector that can be used for multi-target detection. Background technique [0002] Radar life detector is a kind of integrated radar technology and biomedical engineering technology that can penetrate non-metallic media (brick walls, ruins, etc.) An emerging special radar. The radar life detector technology is an emerging technology that takes life as the detection target, and is recognized by the international scientific and technological circles as a very important frontier technology field. Since this technology has no constraints on the measured object, it does not require the connection of contact electrodes, sensors, cables, etc., and it can measure the human body at a certain distance and through certain media (such as clothes, gauze, brick walls, ruins, etc.). Identification and detection, so it can be ...

Claims

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Application Information

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IPC IPC(8): A61B5/113A61B5/11G01S13/08
Inventor 张杨王健琪荆西京吕昊李钊李岩峰焦腾
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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