Linear frequency modulation-based multi-human body safety inspection apparatus and method

Abstract

The invention discloses a linear frequency modulation-based multi-human body safety inspection apparatus. The linear frequency modulation-based multi-human body safety inspection apparatus includes a scanning device, millimeter wave transmitting-receiving assemblies and an image processing unit; the scanning device comprises a plurality of detection seats and a plurality of guide rails arranged on the detection seats, and a motor; each guide rail is provided with one set of millimeter wave transmitting-receiving assembly; the millimeter wave transmitting-receiving assemblies are driven by the motor so as to move relative to people to be inspected; the millimeter wave transmitting-receiving assemblies are used for transmitting millimeter wave signals to the people to be inspected and receiving millimeter wave signals reflected by the people to be inspected; and the image processing unit is used for performing holographic three-dimensional imaging on the bodies of the people to be inspected so as to obtain three-dimensional image of the bodies. The invention also discloses a linear frequency modulation-based multi-human body safety inspection method. The linear frequency modulation-based multi-human body safety inspection apparatus of the invention has the advantages of low price, simple structure, easiness in integration and high resolution, and can detect a large number of peoples in per unit time and causes no radiation hazards to human bodies.

Description

technical field [0001] The invention relates to a human body security inspection system, in particular to a multi-person human body security inspection device and method based on linear frequency modulation. Background technique [0002] Millimeter wave is an electromagnetic wave with a wavelength from 1mm to 10mm, and its frequency is 30GHz to 300GHz. In practical engineering applications, the low-end frequency of millimeter wave is often reduced to 26GHz. In the electromagnetic spectrum, millimeter waves are located in the overlapping wavelength range of microwaves and far-infrared waves, so they have the characteristics of both spectra. Compared with microwave, the characteristics of narrow beam and high-gain antenna are easy to realize, so that the millimeter wave system can obtain higher spatial resolution and higher anti-interference ability. On the other hand, millimeter wave has strong ability to penetrate plasma, large Doppler frequency shift, high speed measuremen...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the shortcomings of existing security imaging equipment mainly include: X-ray-based "naked detectors" are easy to miss non-metallic items and weapons such as explosives, non-metallic knives, liquid dangerous goods, etc., and cause great harm to the human body ;Passive millimeter wave imaging system has slow imaging rate and poor resolution

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