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Gamma radiation imaging nondestructive inspection system for bag, box or baggage

A non-destructive testing, gamma radiation technology, applied in the field of radiation imaging testing of luggage or luggage, can solve the problems of small X-ray irradiation field, short working life, complex structure of X-ray machine, etc., to improve the rotation scanning speed and long service life , to achieve the effect of the pass rate

Inactive Publication Date: 2005-08-31
TSINGHUA UNIV
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Problems solved by technology

Such low X-ray energy results in poor penetration power of the detection system and poor detection of heavier bags
[0006] 2. The structure of X-ray machine is complex and bulky
Heavy and complicated X-ray tube device and high-voltage power supply bring great difficulties to achieve high rotation speed
[0008] 3. Short working life
This greatly increases the operating cost and maintenance workload of this kind of X-ray detection system
[0010] 4. X-ray irradiation field is small
In order to make the X-ray irradiation field contain the object to be examined, the scale and size of the CT device must be large enough, which will lead to an increase in equipment footprint and weight
[0012] 5. Expensive
This will seriously limit the popularization and application of this kind of detection equipment

Method used

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  • Gamma radiation imaging nondestructive inspection system for bag, box or baggage
  • Gamma radiation imaging nondestructive inspection system for bag, box or baggage
  • Gamma radiation imaging nondestructive inspection system for bag, box or baggage

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Embodiment Construction

[0029] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0030] First introduce the structure and working method of the gamma radiation imaging non-destructive testing system for bags or luggage.

[0031] like figure 1 , figure 2 , image 3 and Figure 4 , the gamma radiation imaging non-destructive testing system for bags or luggage of the present invention is also composed of a DR subsystem 1 and a CT subsystem 2 connected in series. The DR subsystem 1 obtains its projection image through radiation scanning of the moving object 3, and the CT subsystem 2 obtains the tomographic image of the relevant part of the object 3 through rotational scanning, and judges whether the object 3 contains easily Inflammable, explosive, drugs and other prohibited items. The DR subsystem mainly includes a fixed frame 1-6, a translational drag mechanism 1-7, and an internal device fixed on the frame 192 The...

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Abstract

The gamma radiation imaging nondestructive detection system for box, bag and baggage is characterized by that DR subsystem and CT subsystem adopt 192Ir radioisotope gamma-ray source with high specific a tctivity, said gamma-ray source is placed in a coffin, said coffin is fixed on the machine frame, and its array detector adopts the array detector suitable for receiving 192Ir radioisotope gamma-ray source.

Description

Technical field: [0001] The gamma radiation imaging non-destructive testing system for luggage or luggage belongs to the application field of nuclear technology, and particularly relates to the technical field of radiation imaging detection for luggage or luggage. Background technique: [0002] Existing luggage or luggage radiation imaging detection systems all use X-ray machines as the radiation source, and its high voltage is 100-200 kV. At present, the X-ray luggage detection system commonly used in China relies on translational scanning to obtain the projection image of the luggage. On the projected image, the images of the items in the bag overlap each other, and the grayscale of each point of the image is determined by the total mass thickness on the projection path. From the luggage projection image provided by the DR-type radiation imaging detection system, it is difficult to distinguish the material properties of the items, so it cannot meet the requirements of sea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/04G01T1/18
Inventor 安继刚刘以思向新程邬海峰吴志芳王立强
Owner TSINGHUA UNIV
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