A passive millimeter wave imaging security inspection device

Abstract

The invention discloses passive millimeter wave imaging security inspection equipment which comprises a one-dimensional focal plane array (1), a reflecting plate (3), a display control sub-system (4), a signal processor (5), an inner calibration combination (6), a reflecting plate rotating mechanism (7), a dielectric panel (8), a rack (9), a detecting table (11), an ellipsoid reflecting surface (2) and an outer calibration combination (10). The ellipsoid reflecting surface (2) focuses electromagnetic waves radiated by a human body, the one-dimensional focal plane array (1) converts the focused electromagnetic waves into voltage signals, the signal processor (5) collects the voltage signals and sends the voltage signals to the display control sub-system (4), and the display control sub-system (4) processes the voltage signals and then outputs two-dimensional grey-scale map. The inner calibration combination (6) and the outer calibration combination (10) are adopted for combined calibration, image quality can be improved, and metal and nonmetal forbidden objects can be detected. The passive millimeter wave imaging security inspection equipment has the advantages of being small in system loss, high in sensitivity and reliability, low in cost, light and the like.

Description

technical field [0001] The invention relates to a security inspection device, in particular to a passive millimeter wave imaging security inspection device. Background technique [0002] The current passive millimeter-wave imaging security inspection equipment includes: focal plane array, reflector, display and control subsystem, signal processor, internal calibration combination, reflector rotation mechanism, dielectric panel, rack, focusing element, and detection table. The focal plane array adopts a plane array or a linear array, and its focal plane components mainly use a direct detection radiometer and a superheterodyne radiometer. The former does not require a local oscillator, is small in size and weight, and is easy to form an array. It has a wider bandwidth and a higher temperature sensitivity. High, but the sensitivity of the detection device in the radiometer is high. The latter is simple to implement, but it is generally not easy to expand the bandwidth, the tem...

AI Technical Summary

Problems solved by technology

[0003]The purpose of the present invention is to provide a passive millimeter-wave imaging security inspection equipment to solve the problems of large-diameter dielectric lens with large insertion loss, structural deformation, performance degradation or even failure

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