Active security check instrument based on terahertz and millimeter wave arc-shaped antenna array

Abstract

The invention discloses an active security check instrument based on a terahertz and millimeter wave arc-shaped antenna array and belongs to the technical field of security check instruments. The active security check instrument comprises a structural assembly, an imaging processing assembly, a servo driving assembly and a connecting assembly; the structural assembly comprises a top frame, a bottom frame and at least four support columns; every two support columns are symmetrically arranged. When the active security check instrument based on the terahertz and millimeter wave arc-shaped antennaarray is compared with the terahertz and millimeter wave human body security inspection equipment adopting a plane scanning mode, a horizontal direction angle covered by the arc-shaped antenna arrayis large enough, so that detection blind areas on the two sides of a human body during human body security inspection are avoided; when the active security check instrument based on a terahertz and millimeter wave arc-shaped antenna array is compared with terahertz and millimeter wave human body security inspection equipment adopting a cylindrical scanning mode, the number of transceiving antennaunits is reduced, the cost and weight of the instrument are reduced, and the instrument better conforms to the ellipsoidal appearance of the human body; and meanwhile, a first terahertz / millimeter wave band transceiver and a second terahertz / millimeter wave band transceiver do linear motion, and while, such transceivers do circular motion in cylindrical scanning equipment, and therefore, the mechanical design of the instrument is simpler, and the stability of the system is higher.

Description

technical field [0001] The invention relates to the technical field of security inspection instruments, in particular to an active security inspection instrument based on terahertz and millimeter wave arc antenna arrays. Background technique [0002] The urgency of the international anti-terrorism situation has put forward new requirements for human security inspection in many aspects. First, it is necessary to be able to perform non-contact 3D holographic imaging detection on items covered by human clothing to improve the recognition rate of suspicious objects such as dangerous goods and contraband. Reduce the missed detection rate; Second, it is necessary to expand the detection capability. In addition to detecting metal targets, non-metallic objects such as ceramics, plastics, paper, powders, and liquids are also detected, including guns, knives, explosives, drugs, and CDs. , cash, liquid, chips, ceramics, etc.; third, it must meet the requirements of national and industr...

AI Technical Summary

Problems solved by technology

The antenna beam pointing of the plane scanning security inspection instrument is always perpendicular to the front. The two antennas can only image the objects in front of and behind the human body. The sides of the body cannot be irradiated, and there will be a large blind area.

The two antenna arrays installed on the suspension of the cylindrical scanning security inspection device scan horizontally in two arc-shaped sectors, which do not match the torso of the human ellipsoid; the height of the cylindrical scanning antenna array is generally designed to be 2 meters and the limit of the human body. The height matches, the length of the antenna of the cylindrical security detector is longer, the number of units is larger, the system is more complex, the cost is doubled, and the weight is heavier

Images