Active millimeter wave imaging security detection system and security detection method

Abstract

The invention provides an active millimeter wave imaging security detection system and a security detection method. The security detection system comprises a millimeter wave signal receiving-transmitting integrated machine for generating and sending a millimeter wave signal needed by a detected object and receiving and processing an echo signal returned by the detected object, and a one-dimensional scanning platform for installing and driving the millimeter wave signal receiving-transmitting integrated machine to be moved along a Z-axis direction. The active millimeter wave imaging security detection system uses a synthetic aperture radar imaging principle, the front and back faces of the detected object are rapidly imaged, the imaging resolution ratio is high, and the great convenience isprovided to the detected object and a security person. The detected object only needs to stand in a security detector for 2 seconds, and the security person only needs to detect a suspicious object according to a suspicious object identification result displayed by an image display module, so a problem that the security person uses a security detection device to be backwards and forwards moved ona body of the detected object so as to produce the inconvenience can be solved.

Description

technical field [0001] The invention relates to the field of security inspection systems, in particular to an active millimeter wave imaging safety detection system and a safety detection method. Background technique [0002] "Millimeter wave" refers to a millimeter wave with a wavelength from 10mm to 1mm and a corresponding frequency from 30GHz to 300GHz. The millimeter wave band mainly studied by the present invention refers to the 27GHz to 34GHz millimeter wave located in the atmospheric propagation window, and the corresponding wavelength of the center frequency is 10mm. [0003] Millimeter wave has the following outstanding advantages: Compared with microwave, 1 millimeter wave has high frequency and short wavelength, so the imaging precision is high, and it has the advantage of small circuit size of millimeter wave circuit; 2 millimeter wave has the ability to work all-weather compared with infrared Under harsh natural conditions such as rain and fog; 3 millimeter wav...

AI Technical Summary

Problems solved by technology

However, since this system uses 384 transceiver units, the cost is relatively high

[0009] Domestic millimeter-wave imaging, affected by the relatively low level of development of early millimeter-wave devices, mostly adopts a passive system, with bulky prototypes, high cost, low imaging resolution, and long scanning time

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