A long-distance human body hidden dangerous goods detector based on radar target polarization characteristics

Abstract

The invention discloses a far-distance human-body-hiding hazardous article detector based on the radar target polarization characteristic. The detector comprises a display control end, a signal processing and control module, a linear frequency modulation source module, a transceiving frequency doubling link module, a clock distributing module, a medium-frequency amplification filtering module and a signal acquisition module. The linear frequency modulation source module provides linear frequency modulation signals to the transceiving frequency doubling link module. The transceiving frequency doubling link module conducts frequency doubling and amplifying on the linear frequency modulation signals provided by the linear frequency modulation source module so that the frequency of the linear frequency modulation signals can reach the designated frequency band and the linear frequency modulation signals can irradiate a detected object, reflection echoes of the detected object are received, processed and then transmitted to the medium-frequency amplification filtering module and finally return to the display control end. The display control end counts the distribution of strength values of two perpendicular routes of echoes of the detected objects according to the received multi-acquisition data, so whether the detected object carries a hazardous article or not can be effectively detected, far-distance detection can be achieved, security check can be conducted on high-density people in open places, and the detected object does not need to cooperate actively.

Description

technical field [0001] The invention relates to the technical field of security inspection by radar detection, in particular to a long-distance human hidden dangerous article detector based on the polarization characteristics of radar targets. Background technique [0002] In recent years, incidents such as violent terrorist attacks have occurred from time to time, and people have put forward higher requirements for anti-terrorism security, especially in public places with large traffic such as airports, railway stations or subway entrances, how to realize the hidden knives hidden by criminals The long-distance rapid automatic detection and identification of weapons, guns, explosives and other weapons is a difficult problem in the field of public security. [0003] Existing security inspection methods use the equipment placed at the entrance of the passageway to inspect the human body and carry-on items separately. The advantage is that the detection error probability is ver...

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Problems solved by technology

[0004] However, in open places without clear passage entrances, such as squares and other places, the above-mentioned type of security inspection device cannot be used for rapid detection of hidden dangerous goods that are not cooperative objects at a certain safe distance, and there is no effective technical means at present. for remote security checks

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