Two-dimensional scanning passive millimeter-wave imaging system and method

Abstract

The invention discloses a two-dimensional scanning passive millimeter-wave imaging system and method. The system comprises an imaging system housing, which is used for transmitting wave for a rotatable reflection plate, and shading light for the rotatable reflection plate, an ellipsoidal reflection surface, a fixed reflection plate and a receiving and imaging system; a servo system, which is usedfor driving the imaging system housing to rotate; the rotatable reflection plate, which is used for reflecting millimeter wave signals to the ellipsoidal reflection surface; the ellipsoidal reflectionsurface, which is used for reflecting the millimeter wave signals to the fixed reflection plate; the fixed reflection plate, which is used for reflecting the millimeter wave signals to the receivingand imaging system; the receiving and imaging system, which is used for receiving the millimeter wave signals and converting the millimeter wave signals into voltage signals; an acquisition system, which is used for receiving the voltage signals and converting the voltage signals into digital signals; and a computer, which is used for receiving the digital signals and processing the digital signals into images for display. According to the system, the scanning area is increased, the system size is reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of millimeter wave imaging, in particular to a two-dimensional scanning passive millimeter wave imaging system and method. Background technique [0002] The passive millimeter-wave imaging system does not emit electromagnetic waves at all, and only recognizes the target by receiving the radiation of the object itself. Therefore, there are no disadvantages such as target flicker and human radiation. [0003] Traditional security inspection equipment includes metal detection systems, X-ray security inspection systems, etc. Obviously, the metal security inspection system can only detect metal objects, and cannot detect and identify non-metallic dangerous objects such as explosives and drugs. The X-ray security inspection system cannot be used to detect the human body because it is harmful to the human body. [0004] The authorized announcement number is CN206224001U utility model patent "omnidirectional security inspec...

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Problems solved by technology

[0009] The purpose of the present invention is to propose a two-dimensional scanning passive millimeter-wave imaging system and method to solve the problems of the existing passive millimeter-wave imaging systems such as narrow field of view, large volume, slow work efficiency, and large number of radiometers used.

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