Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Terahertz security check imaging system and method

An imaging system, terahertz technology, applied in radio wave measurement system, radio wave reflection/re-radiation, using re-radiation, etc.

Active Publication Date: 2020-08-07
NAT SPACE SCI CENT CAS
View PDF16 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of simultaneous imaging of multiple people by the terahertz security inspection system, thereby providing a rotary scanning terahertz security inspection imaging system. By combining mechanical scanning and synthetic aperture imaging, the number of array elements is low and the system cost is controllable. By scanning and sending signals around, multiple people can be imaged, and the range of action is large, which can be used for short-distance human security inspection, and can also be used for large-scale imaging monitoring

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Terahertz security check imaging system and method
  • Terahertz security check imaging system and method
  • Terahertz security check imaging system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Such as figure 1 As shown, the present invention proposes a terahertz security imaging system, which adopts synthetic aperture imaging in two dimensions, combines circular scanning with vertical motion, that is, forms helical scanning, and uses the movement of the antenna to form a synthetic aperture. The antenna adopts The wide beam coverage reduces the volume and weight of the antenna. At the same time, the wide beam can obtain a large Doppler bandwidth, and obtain high azimuth resolution after synthetic aperture processing.

[0065] The imaging system includes: a rotating platform that can move vertically up and down, a motor, a terahertz transceiver channel and a data processing module set on the host computer; the terahertz transceiver channel is set on the edge of the rotating platform, which can Implement a helical scan.

[0066] The terahertz transceiver channel is set on the rotating platform, and the radius between the antenna phase center and the center of t...

Embodiment 2

[0089] Based on the above system, Embodiment 2 of the present invention proposes a terahertz security imaging method, including:

[0090] The circular rotation method is adopted in the horizontal plane, and the linear motion is adopted in the vertical direction to form a helical scan as a whole. The signal is transmitted outward through the transmitter and the terahertz antenna, and the echo signal is obtained through the receiver after being reflected by the target, and processed through synthetic aperture imaging. Horizontal and vertical resolution is better than centimeter level.

[0091] Set 4 point targets in the three-dimensional space for simulation verification, and the imaging geometric relationship is as follows: figure 2 As shown, using the imaging method of the present invention, the simulation results of 4 point targets are obtained, such as image 3 shown. After analysis, the horizontal and vertical 3dB width of the point target at the center is 2.2mm×3.4mm, a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a terahertz security check imaging system and method. The system comprises a rotating platform capable of vertically moving up and down, a motor, a terahertz transceiving channel and a data processing module arranged on an upper computer. The motor controls the horizontal rotation and the vertical movement of the rotating platform, the terahertz transceiving channel is arranged at the edge part of the rotating platform, can realize the spiral scanning in the movement of the rotating platform and is used for transmitting a signal outwards, acquiring an echo signal reflected by a target and transmitting the echo signal to the data processing module, and the data processing module is used for processing the echo signal and outputting a two-dimensional display image. According to the present invention, the omnidirectional observation is realized through the antenna rotation scanning of the system, a target in a 360-degree range is imaged, and security check can be performed on multiple persons at the same time.

Description

technical field [0001] The invention relates to the technical field of radar systems and signal processing, in particular to a terahertz security inspection imaging system and method. Background technique [0002] Terahertz radar has the advantages of high imaging resolution, small size, light weight, strong penetrating power, and no harm to the human body. Active terahertz imaging can effectively image the human body, find prohibited items, and avoid invading privacy. At present, the security imaging system can be divided into scanning type and two-dimensional array type. A scanning imaging system achieves high resolution through quasi-light focusing in the terahertz frequency band, and at the same time performs point-by-point imaging of the human body through two-dimensional mechanical scanning (literature [1]: G.Timms, M.Brothers, J.Bunton, J.Archer, G.Rosolen, Y.Li, et al., “Design and testing of an active 190-GHz millimeter-wave imager,” Journal of Electronic Imaging, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01S13/88G01S13/90
CPCG01S13/887G01S13/9056G01S13/9082
Inventor 董晓杨青山张云华张德海
Owner NAT SPACE SCI CENT CAS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com