Chaotic laser-based ultra wide band throughwall radar detection device

A chaotic laser and wall-penetrating radar technology, which is applied in measuring devices, electromagnetic wave re-radiation, radio wave measurement systems, etc., can solve the problem of low resolution of ultra-wideband wall-penetrating radar, and achieve low power consumption and high bandwidth signal spectrum , flexible and controllable spectrum characteristics

Active Publication Date: 2013-07-17
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a chaotic laser-based ultra-wideband through-wall radar detection device to solve the problem of low resolution of the existing ultra-wideband through-wall radar

Method used

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  • Chaotic laser-based ultra wide band throughwall radar detection device
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Embodiment Construction

[0029] Specific embodiments of the present invention are described below:

[0030] Implementation of the ultra-wideband wall-penetrating radar detection device based on chaotic laser according to the present invention is composed of a transmitting end and a receiving end. Photodetector 4a, preamplifier 5, transmitting antenna 6, light fast variable delay line 14 and the second photodetector 4b; At the receiving end, receive with identical two-way, the first way comprises the first receiving antenna 7a, The first low noise amplifier 8a, the first synchronous acquisition system 9a and the first digital correlator 10a; the second path includes the second receiving antenna 7b, the second low noise amplifier 8b, the second synchronous acquisition system 9b and the second digital correlator 10b, the feature information of the two signals is extracted and input to the signal processing system 11, the data is processed to obtain the specific information of the object, and the object i...

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Abstract

The invention discloses a chaotic laser-based ultra wide band throughwall radar detection device, wherein the chaotic laser is sent out by an ultra wide band chaotic laser source and is modulated by a time signal into a periodically-emitted chaotic laser impulse sequence after passing through an electrooptical modulator, the chaotic laser impulse sequence is separated into a detected signal and areference signal by an optical fiber coupler, the detected signal is injected into a photoelectric detector to be converted into an ultra wide band microwave signal, the ultra wide band microwave signal is amplified by a preamplifier and sent out by an ultra wide band microwave transmitting antenna; and at a receiving end, the return signal which is scattered by a target object passes through an obstacle and then received by two paths of receiving antennas, the received return signal is amplified by a low noise amplifier, synchronously acquired by a synchronous acquisition system, and then input into a digital correlator for being correlated with the reference signal which is converted into an electrical signal after passing through a quick light variable delay line and the photoelectric detector, so the characteristic information of the target object is obtained, two paths of characteristic information are input into a signal processing system to be processed for obtaining the azimuth angle and distance of the target object, so the locating and the two-dimensional imaging of the target object are realized.

Description

technical field [0001] The invention relates to a radar detection device, in particular to a chaotic laser-based ultra-wideband through-wall radar detection device composed of a transmitting end and a receiving end, which is used for post-disaster personnel rescue, military affairs, anti-terrorism, non-destructive detection of cultural relics and life detection. Background technique [0002] Since World War II, radar has played an increasingly important role in aviation, aerospace, transportation, weather forecasting, geodesy and military affairs. As an important means of obtaining spatial information, radar plays a pivotal role in modern battlefields and ruins in disaster areas. [0003] Today, major powers in the world are facing severe challenges in the fight against terrorism. If you can find the enemy hidden behind the wall, you will undoubtedly increase your chances of winning and reduce casualties; in the ruins of fire and earthquake, if you can know the survivors Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/88G01S7/48
Inventor 张明江王云才吉勇宁郑建宇孟丽娜刘鎏王安帮
Owner TAIYUAN UNIV OF TECH
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