Target detection method and security check instrument

A technology of target detection and security inspection instrument, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of low efficiency and long detection time, and achieve the effect of accurate imaging, reducing errors and reducing dwell time.

Pending Publication Date: 2022-05-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a target detection method and a security detector to solve the problem of low efficiency caused by too long detection time when the conventional millimeter wave security detector checks the target

Method used

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  • Target detection method and security check instrument
  • Target detection method and security check instrument
  • Target detection method and security check instrument

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Experimental program
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Effect test

Embodiment 1

[0098] In the security checkers of the first and second embodiments, the first linear array antenna and the second linear array innately detect the measured target on the transmission device, including the height-dimensional electrical scanning and the azimuth-dimensional electrical scanning, and the azimuth-dimensional electrical scanning is Scan each position of the tested target moving with the conveyor belt, and obtain the final security inspection image according to the data collected in two dimensions and the actual position coordinates of the antenna obtained through the camera.

[0099] The following describes the target detection method applied to the security inspection apparatus in the first embodiment or the second embodiment through the third embodiment.

[0100] Figure 8 A schematic flowchart of a target detection method provided in Embodiment 3 of the present application. The detection method in this embodiment is applied to the security inspection apparatus in...

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Abstract

According to the target detection method and the security inspection instrument provided by the invention, the processing device receives the second signal returned after the first signal emitted by the linear array antenna to the direction of the transmission device is reflected, and the processing device also receives the shot image shot by the camera. The processing device performs image processing on the shot image to obtain the actual position coordinates of the linear array antenna, and then performs imaging on the second signal sent by the linear array antenna according to the actual position coordinates to obtain the image corresponding to the linear array antenna, so that the imaging error caused by the micro-motion of the human body is reduced, and the imaging is more accurate. The safety inspection object is conveyed through the conveying belt, the residence time of the safety inspection object is shortened, the safety inspection object is scanned through the two linear array antennas at the same time, and the hidden target detection probability and the safety inspection efficiency are improved.

Description

technical field [0001] The present application relates to the technical field of security inspection, and in particular, to a target detection method and a security inspection instrument. Background technique [0002] Safety is the main issue in today's social development. It has become an indispensable job for various countries to conduct human security inspections on important transportation hubs including airports and important places such as government agencies. , Safety inspection measures to check whether prohibited items and dangerous items are carried in the body under human clothing. [0003] At present, conventional human body security inspection systems include metal detection type security inspection systems, X-ray human body security inspection systems and active millimeter wave security inspection systems. Among them, the active millimeter wave security inspection system actively transmits modulated electromagnetic wave signals, and the electromagnetic wave sig...

Claims

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Application Information

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IPC IPC(8): G01V8/00G01V8/20
CPCG01V8/005G01V8/20
Inventor董戈丁长青胡波雄
OwnerTSINGHUA UNIV