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A Millimeter Wave Plane Scanning Imaging Method Based on Segmentation Algorithm

A technology of plane scanning and imaging method, which is applied in the exploration of nuclear radiation, radio wave measurement system, reflection/re-radiation of radio waves, etc.

Active Publication Date: 2017-08-25
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in reality, millimeter-wave planar scanning imaging cannot fully illuminate the entire target due to the limited antenna beam.

Method used

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  • A Millimeter Wave Plane Scanning Imaging Method Based on Segmentation Algorithm
  • A Millimeter Wave Plane Scanning Imaging Method Based on Segmentation Algorithm

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0022] like figure 1 As shown, the millimeter-wave transceiver front-end scans on the rectangular scanning plane 4, wherein the horizontal scanning is performed by switching switches in the system to achieve electrical scanning, and the vertical scanning is performed mechanically by an external scanning device. The transmitting antenna of the imaging system transmits a millimeter wave signal, and the receiving antenna mixes the...

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Abstract

The present invention relates to a millimeter-wave plane scanning imaging method based on a segmentation algorithm, comprising the following steps: obtaining a signal f(x, y, ω) on a millimeter-wave scanning plane; converting the signal f(x, y, ω) Segmentation is carried out according to the opening angle of the antenna beam; the two-dimensional discrete Fourier transform of the above segmented signal about x and y is performed; the phase correction signal is obtained by the phase correction factor; the phase correction signal is obtained from a uniform (kx, ky , ω) domain interpolation to the uniformly sampled (kx, ky, kz) domain; the three-dimensional discrete Fourier inverse transform is used to process the above-mentioned processed signal to obtain g1(x, y, z), g2(x, y, z ),...,gn(x,y,z); calculate the magnitude of g1(x,y,z), g2(x,y,z),...,gn(x,y,z), and then Superimpose them according to the original position to form the whole result of the target to get the target image. The invention can obtain clearer imaging results.

Description

technical field [0001] The invention relates to the technical field of millimeter wave imaging, in particular to a millimeter wave plane scanning imaging method based on a segmentation algorithm. Background technique [0002] Faced with the growing threat of terrorism, personal security screening in public places has become increasingly important. Millimeter-wave imaging has been widely studied due to its advantages of being harmless to the human body and wide identifiable targets. The millimeter wave imaging detector is based on the principle of millimeter wave reflection, and uses reflected millimeter waves to scan and detect the human body, which can effectively detect contraband and dangerous goods hidden under human clothing without direct contact with the human body, such as guns, knives, Explosives, drugs, etc., and display the test results in the form of images, which can meet the needs of human security inspection in airports, stations, land crossings, important ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V5/00G01S13/89
Inventor 孙晓玮朱玉琨杨明辉孙芸
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI