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Single-channel UWB-based radar type life detection instrument for multi-target detection

A life detector, single-channel technology, applied in the field of non-contact life parameter detection, can solve the unsolved problems such as identification and positioning of multiple stationary human targets

Inactive Publication Date: 2011-04-13
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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  • Single-channel UWB-based radar type life detection instrument for multi-target detection
  • Single-channel UWB-based radar type life detection instrument for multi-target detection
  • Single-channel UWB-based radar type life detection instrument for multi-target detection

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Experimental program
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Effect test

Embodiment 1

[0029] This embodiment provides a single-channel ultra-wide-spectrum radar-type life detector, figure 1 It is the principle block diagram of the 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 narrow pulses, which are radiated through the transmitting antenna. The reflected signal is sent to the sampling integrator through the receiving antenna. The signal generated by the pulse oscillator passes through the delay circuit to generate a distance gate, and the received signal is selected. The signal passes through the sampling integrator circuit, and the weak signal is accumulated after thousands of pulses. It is detected, amplified and filtered, and then sampled by the high-speed acquisition card and sent to the computing unit. The computing unit analyzes and identifies the collected signals, and finally calculates the target distance.

[0030] li...

Embodiment 2

[0038] This embodiment provides the parameter indicators of the single-channel ultra-wide-spectrum radar life detector:

[0039] The relevant parameters of the system's antenna and transceiver system are as follows:

[0040] (1) The antenna is: dielectric coupling shielding type;

[0041] (2) Number of antennas: 1 transmitting antenna, 1 receiving antenna;

[0042] (3) Center frequency of transceiver antenna: 500MHz;

[0043] (4) Bandwidth: 500MHz;

[0044](5) Time window: adjustable from 4 to 5000ns;

Embodiment 3

[0046] Static target weak signal enhancement:

[0047] 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.

[0048] The signal is integrated in the distance by using the 8-point 4-point integration method; then the signal is decomposed and reconstructed to synthesize the target echo signal and the distance signal; the target echo signal is digitally filtered and digitally differentiated to achieve Enhancement of weak useful signals.

[0049] 3.1 Integration of the signal

[0050] The sampling rate of the high-speed acquisition card used in this embodiment is 64 Hz, and the amount of data sampled by A...

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Abstract

The invention discloses a single-channel ultra-wide bandwidth (UWB)-based radar type life detection instrument for multi-target detection. The life detection instrument comprises a UWB biologic radar front end and a calculating unit, wherein the UWB biologic radar front end comprises a transmitting antenna, a receiving antenna, a pulse oscillator, an electromagnetic pulse generator and a sampling integrator; the pulse oscillator generates a pulse signal; the signal triggers the electromagnetic pulse generator to generate a narrow pulse and radiates the narrow pulse out through the transmitting antenna; a reflected signal is transmitted to the sampling integrator through the receiving antenna; a pulse signal generated by the pulse oscillator simultaneously generates a distance gate through a delay circuit and a distance gate generator to select a received signal; the signal passes through a sampling integration circuit; a weak signal is detected after accumulation, amplified and filtered by an amplifier and a filter, sampled by a high-speed analogue / digital (A / D) acquisition card and transmitted to the calculating unit; and the acquired signal is analyzed by the calculating unit to extract life information and each target distance of multiple human targets.

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-type life detector that can be used for multi-target detection. Background technique [0002] Radar life detector is a fusion radar technology and biomedical engineering technology that can penetrate non-metallic media (brick walls, ruins, etc.) to detect human life (breathing, heartbeat, body movement, etc.) non-contact and long-distance. An emerging special radar. The radar-type life detector technology is an emerging technology that takes life as the detection target, and is a very important frontier technology field recognized by the international scientific and technological community. Since this technology has no constraints on the object to be measured, there is no need for the connection of contact electrodes, sensors, cables, etc., and it can penetrate a certain medium (such as clothes, gauze, brick walls, ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00G01S17/08
Inventor 王健琪荆西京张杨吕昊李岩峰李钊于霄
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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