Detecting device and security inspection equipment

Abstract

An embodiment of the invention discloses a detecting device and security inspection equipment. The detecting device comprises a main control module, a dangerous goods detecting module and a display module, wherein the main control module is connected to the dangerous goods detecting module and the display module; the dangerous goods detecting module comprises a frequency modulation source module,a multiplier link module and a signal acquisition module, one end of the multiplier link module is connected to the frequency modulation source module, and the other end of the multiplier link moduleis connected to the signal acquisition module; and the multiplier link module is used for multiplying and transmitting two terahertz wave signals sent by the frequency modulation source module to a target object, mixing the returned reflected echo signal with the other two terahertz wave signals sent by the frequency modulation source module to obtain an output signal, and further transmitting theoutput signal to the signal acquisition module. In the embodiment of the invention, the security inspection equipment is at least one of an intelligent security inspection robot, an intelligent security inspection patrol vehicle and an intelligent security inspection instrument, which improves the intensity and range coverage of the terahertz signals, and the automatic detection rate and accuracy.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of security inspection, and in particular, to a detection device and security inspection equipment. Background technique [0002] With the development of science and technology and the improvement of people's security requirements, how to realize the rapid detection and identification of dangerous goods in public places with a large flow of people, such as airports, railway stations or subway entrances, is a challenge faced by the target public security field. Important issues. [0003] In the prior art, non-contact human body security inspection technologies include metal detection gates, micro-dose X-ray imaging, X-ray flying-spot scanning backscatter imaging, millimeter-wave imaging, passive terahertz imaging and active terahertz imaging, etc. Among them, metal detection gates cannot detect non-metallic contraband, such as ceramic knives, plastic guns and deadly explosives. At t...

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Problems solved by technology

Among them, metal detection gates cannot detect non-metallic contraband, such as ceramic knives, plastic guns and deadly explosives. At the same time, metal detection false alarms are high, and manual supplementary hand-held metal detectors are required for re-examination. The security inspection efficiency is low and the labor intensity is high. ; Micro-dose X-ray imaging technology and X-ray flying spot scanning backscatter imaging technology have good imaging quality, but there is a risk of ionizing radiation damage to the human body; although millimeter-wave imaging technology has no ionizing radiation, the highest detection rate of automatic identification is only 85%. Manual supplementary re-inspection is also required. Due to the limitation of resolution, the imaging quality is difficult to meet the requirements; the passive terahertz imaging security inspection has a simple structure, no radiation, non-contact and non-stop, but it cannot be used outdoors. The environmental requirements are high; the existing active terahertz imaging technology has low detection accuracy for open places without clear passage entrances

[0004] The above-mentioned non-contact human body security inspection devices all need to carry out coordinated security inspections in fixed security inspection channels, and at the same time need to be accompanied by "body search" inspections. Not only is the work efficiency low, but it is also suspected of violating privacy. The accuracy of non-perceptual detection of dangerous goods cannot meet the actual needs

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