Method and device for checking liquid article

A liquid and object technology, which is applied in the field of radiation inspection, can solve the problems of radiation residue, inability to provide sufficient evidence for whether liquid objects contain drugs, and is not suitable for rapid safety inspection, so as to improve the detection speed and facilitate the review operation.

Active Publication Date: 2011-06-15
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electromagnetic methods are inherently susceptible to adverse effects from metal packaging and packaging of thicker materials
Therefore, in the actual situation of complex packaging materials, the electromagnetic method has certain limitations
[0007] 3) The use of the neutron inspection method will cause the phenomenon of "neutron activation", that is, the inspected liquid items that have passed the neutron inspection will have radiation residues
These technologies can obtain the structural information of the object, but cannot judge whether there are drugs hidden in the liquid; this is because after the drug is hidden in the liquid, only the composition changes, but the overall structure does not change significantly
[0009] To sum up, for rapid inspection of liquid objects, chemical methods, electromagnetic methods and neutron methods have the characteristics that they are not suitable for rapid security inspection. Using X-ray two-dimensional imaging technology and three-dimensional CT scanning imaging technology can only obtain Images with structural information cannot provide sufficient basis for judging whether liquid objects contain drugs

Method used

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  • Method and device for checking liquid article
  • Method and device for checking liquid article
  • Method and device for checking liquid article

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Experimental program
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no. 1 approach

[0081] figure 1 is a schematic structural diagram of an inspection device according to an embodiment of the present invention.

[0082] Such as figure 1 As shown, the inspection equipment according to this embodiment includes: a radiation source 10 that emits dual-energy X-rays for inspection, such as an X-ray machine; Detect the liquid object into the detection area, so that the radiation emitted by the ray source 10 can pass through the liquid object to be inspected; the detection and collection device 30 is a detector and a data collector with an overall module structure, which is used to detect the liquid object to be inspected. The dual-energy ray of the item obtains an analog signal, and converts the analog signal into a digital signal, thereby outputting the scanning data of the liquid item for high-energy X-rays and low-energy X-rays; the controller 50, which is used to control the synchronous work of various parts of the entire system ; and a computer data processor...

no. 2 approach

[0181] The above first embodiment describes the situation of detecting a single liquid item each time, and the operation process of simultaneously detecting multiple liquid items will be described in detail below in conjunction with FIGS. 16 to 19 . The difference between the second embodiment and the first embodiment is that because there are many liquid items, after the CT imaging is completed, the position of the imaging result displayed on the display corresponds to the position of the object on the carrying mechanism, so as to facilitate operation The officers figured out that the liquid object was suspicious. Figure 16A with Figure 16B A schematic diagram showing a reconstructed CT image in the case of detecting multiple liquid items according to the second embodiment of the present invention.

[0182] For example, the operator observes the object to be inspected on the carrying mechanism in a overlooking manner, which requires that the position of each object on each...

no. 3 approach

[0199] In order to further improve the detection efficiency and prevent the problem that the slender liquid objects to be inspected are directly placed on the carrying mechanism, which may cause instability during the inspection and affect the detection effect, the third embodiment proposes to place multiple objects in the divided bucket.

[0200] Therefore, the difference between the third embodiment and the second embodiment is that a divided bucket is used in the process of inspecting multiple objects. Attached below Figure 20-25 The specific operation process of the detection device according to this embodiment will be described in detail.

[0201] Figure 20 shows a side view of the divided barrel according to the present embodiment, Figure 21 shows a top view of the compartmented barrel, while Figure 22 A bottom view of the compartment bucket is shown.

[0202] Such as Figure 20 As shown, the compartment 70 includes a bottom and side walls coupled to the bottom....

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Abstract

The invention discloses a method and device for checking a liquid article by a dual-energy CT (computed tomography). The method comprises the following steps: carrying out DR (data recording) scanning on the liquid article to obtain a transmission image of the liquid article to be checked; analyzing the pixel values of the transmission image to determine whether the transmission image is laminated or not; carrying out dual-energy CT scanning on the liquid article to be checked at one or more than one positions in each layer to obtain dual-energy CT projection data; carrying out CT rebuilding according to the projection data to obtain a CT image indicating physical attribute values of the liquid article to be checked; extracting the physical attribute values of the liquid article accordingto the CT image; and judging whether the liquid article is counterfeit based on the physical attribute values and the reference physical attribute values of the liquid article. By applying the invention, the liquid article can be rapidly checked.

Description

[0001] This application is a divisional application of the invention patent application No. 200710180653.2 entitled "Method and Equipment for Inspection of Liquid Objects" submitted to the China Patent Office on October 5, 2007. technical field [0002] The invention relates to the technical field of radiation inspection, in particular to a method and equipment for rapid safety inspection of liquid articles by performing dual-energy CT imaging on liquid articles. Background technique [0003] After the 9.11 incident in the United States, more and more attention has been paid to the safety inspection work in the aviation field. On the basis of the security inspection of luggage and parcels carried out in the past, the requirements for the security inspection of liquid items carried by passengers have been added. Therefore, there is an urgent need for effective ways and means to perform rapid security inspection of liquid items in luggage. [0004] Currently, there are four t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/24G01V5/00G01N23/04G01N23/10
Inventor 陈志强张丽王学武胡海峰吴宏新李元景刘以农赵自然邢宇翔唐虎易裕民张金宇
Owner TSINGHUA UNIV
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