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Method for suppressing mutual correlation interference of terahertz scanning imaging equipment

A scanning imaging device and terahertz technology, applied in the field of scanning imaging, can solve the problems of image filtering and noise reduction algorithm interference, affecting the detection effect, etc., and achieve the effect of suppressing mutual interference

Pending Publication Date: 2020-11-17
SHANGHAI HENGLIN OPTIC ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, when there is no detected object between the two devices, obvious noise can be seen in both images, which brings serious interference to the image filtering and noise reduction algorithms of the device, affecting the final detection effect. See image 3

Method used

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  • Method for suppressing mutual correlation interference of terahertz scanning imaging equipment
  • Method for suppressing mutual correlation interference of terahertz scanning imaging equipment
  • Method for suppressing mutual correlation interference of terahertz scanning imaging equipment

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0040] Specific implementation method one, see Picture 9 : A main controller is used to control the respective movements of the scanning mechanisms of the two devices, and the scanning mechanism control signal sent by the main controller to one of the first devices 1 is used as the reference control signal to make the first light output by the first device 1 The swing angle of the shaft 111 is used as the reference angle; the scanning mechanism control signal sent by the main controller to the second device 2 is used as the bias control signal to make the swing angle of the second optical axis 211 output by the second device 2 lead or lag behind the reference angle by 0.25 t;

[0041] When a main controller controls the respective movements of the scanners of two devices, the two devices are of the same specification and model.

Embodiment approach 2

[0042] Specific implementation method two, see Picture 10 : Use a first device 1 with a built-in main controller and control the movement of its own scanning mechanism as the host, and another second device 2 without a built-in main controller that needs to receive external control signals to control the movement of its scanning mechanism The slave machine uses the signal from the main controller of the first device 1 to control its own scanning mechanism as the reference control signal, and makes the swing angle of the first optical axis 111 output by the first device 1 as the reference angle; sends the main controller of the first device 1 to The control signal of the second device 2 is used as a bias control signal to make the swing angle of the second optical axis 211 output by the second device 2 lead or lag behind the reference angle by 0.25t.

[0043] The working principle is as follows. When the swing angle of the first optical axis of one device is 0°, the swing angle o...

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Abstract

The invention provides a method for suppressing mutual correlation interference of terahertz scanning imaging devices, which is characterized in that when two terahertz scanning imaging devices are placed face to face, the swing angle of the first optical axis of one device is 0 degree, and the swing angle of the second optical axis of the other device is not 0 degree; therefore, the mutual correlation interference of the two devices when no detection object exists is suppressed, the effect of an image noise reduction filtering algorithm is improved, and a better detection image is obtained.

Description

Technical field [0001] The invention relates to the technical field of scanning imaging, in particular to a method for suppressing mutual interference of terahertz scanning imaging equipment. Background technique [0002] The terahertz scanning imaging device (hereinafter referred to as the "device") continuously swings its optical axis through the scanning mechanism to obtain the terahertz signal emitted by the object, thereby imaging the object. The principle is as follows figure 1 . [0003] If you need to image the front and back sides of an object at the same time (such as real-time security inspection of prohibited items on the human body), you need to place the two devices face-to-face and scan and image separately. The detected human body or object is between the two devices. See the principle figure 2 . [0004] When the human body or the object is temporarily moved away during the detection process, if the optical axes of the two devices just swing to the right position, o...

Claims

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Application Information

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IPC IPC(8): G01V8/10
CPCG01V8/10
Inventor 袁毅
Owner SHANGHAI HENGLIN OPTIC ELECTRIC CO LTD