Passive millimeter wave dual-channel synchronous imaging system for security inspection and imaging method thereof

Abstract

The invention discloses a passive millimeter wave dual-channel synchronous imaging system for security inspection and an imaging method thereof, and belongs to the technical fields of millimeter waveimaging, security inspection and the like. The passive millimeter wave dual-channel synchronous imaging system comprises a smooth metal reflecting plane, a Cassegrain antenna, a radiometer, a longitudinal rotary plate, an optical fiber sensor, a horizontal rotary plate, a sensor retaining piece, a proximity switch, a data acquisition unit, a computer and a scanning control unit, wherein the smoothmetal reflecting plane is fixed on the longitudinal rotary plate at an angle of 45 degrees, the longitudinal rotary plate and the Cassegrain antenna are coaxially fixed on the horizontal rotary plate, a feed source of the Cassegrain antenna is connected with the radiometer, the radiometer is connected with the data acquisition unit, and the data acquisition unit is connected with the computer. The imaging system has the advantages of simple structure, low cost, small size, low power consumption, high stability and high imaging speed, can effective detect dangerous articles hidden on a human body, and can simultaneously perform security inspection imaging on inspected people in security inspection channels at the left and right of a scanning platform, thereby greatly improving the securityinspection efficiency.

Description

technical field [0001] The invention belongs to the technical fields of millimeter wave imaging, security inspection, etc., and relates to an imaging system, in particular to a W-band passive millimeter wave dual-channel synchronous imaging system for human body security inspection. Background technique [0002] Nowadays, the security situation is severe, and people have put forward higher requirements for the security, reliability and intelligence of the security inspection system. At present, the security inspection department mainly uses X-ray security inspection equipment to detect contraband in luggage. The security inspection has strong detection capabilities and can obtain high-resolution perspective images. However, the ionization effect of X-rays is more harmful to the human body and cannot be used to detect hidden objects contraband. Even though x-ray machines with low radiation doses currently exist, they are not easily accepted by the public. For example, the s...

AI Technical Summary

Problems solved by technology

The common scanning method is mainly row-column scanning, which needs to be continuously accelerated and decelerated during the scanning process, the imaging time is long, and the resolution is low; or there is an improved method, using one-dimensional electronic scanning and another two-dimensional mechanical scanning, which accelerates the scanning process. Imaging time, but requires arrays of multiple receivers, greatly increasing system cost

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