Dual-purpose collimating device with seam

A collimator and dual-purpose technology, applied in the direction of using the diaphragm/collimator, etc., can solve the problems of poor accuracy and repeatability, difficult operation, negative impact on image quality, etc., and achieve high precision and good repeatability Effect

Active Publication Date: 2008-12-24
NUCTECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Since the dimensional accuracy of the irradiation field is not high in radiography, the accuracy and coordination of the motors, gears, transmission belts, lead screws and other moving mechanisms that lead the collimation block in this type of collimator are not high. The width of the horizontal seam is difficult to operate, and the accuracy and repeatability of the adjustment process are poor, which has a certain negative impact on the image quality

Method used

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  • Dual-purpose collimating device with seam
  • Dual-purpose collimating device with seam
  • Dual-purpose collimating device with seam

Examples

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Embodiment Construction

[0020] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] attached figure 1 It shows a specific arrangement scheme of a radiographic and CT dual-purpose non-destructive testing system applying the present invention, which mainly consists of an accelerator 1, a shielding device 2, a zeroth collimator 3, a collimator 4, a cone-shaped ray beam 5, and an inspected Object 6, X-ray photosensitive device 7, flat fan beam 8, rear collimator 9, detector 10, signal processing and imaging system 11, remote control system 12 and so on.

[0022] The accelerator is the source of X-rays, which generate a three-dimensional distribution of X-rays mainly in the forward direction and at an angle of 4π. The shielding device blocks the useless X-rays in the lateral and backward directions to eliminate the influence of stray X-rays on the quality of inspection. The null collimator confines the forward-faci...

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PUM

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Abstract

The invention relates to the technical fields of high-energy lossless testing (such as radiography, industrial CT, etc.), and discloses a dual-purpose collimator with a clearance. The collimator comprises two pairs of collimating blocks that can respectively move horizontally and vertically, wherein, when the pair of collimating blocks that can move vertically move to relatively shut horizontally, a horizontal clearance is formed between the pair of collimating blocks that can move vertically, wherein, the horizontal clearance can be formed by a small groove milled in the collimating blocks that can move vertically or a gasket with certain thickness arranged on two corners of the collimating blocks that can move vertically. The dual-purpose collimator of the invention achieves a purpose that the collimator can precisely realize small-sized horizontal clearances when being used for industrial CT, have high precision, good repeatability as well as no influences on the application of the collimator in radiography simultaneously under a condition of hardly affecting production cost by designing fixed horizontal clearances on the collimating blocks of the common collimator with a simple function of a two-dimensional definite radiation filed.

Description

technical field [0001] The invention relates to the technical fields of high-energy non-destructive testing such as radiography and industrial CT, in particular to a dual-purpose collimator with a slit. Background technique [0002] The field of high-energy non-destructive testing with high-energy ray sources as radiation sources, including radiography and industrial CT. The source of high-energy radiation is usually an accelerator, and a small number of systems use high-energy radionuclides. Radiography is to expose the inspected object to the radiation field of the high-energy ray source for a period of time, and obtain the shape / structure information of the object through the photosensitive film on the backlight side; industrial CT is to place the inspected object between the high-energy ray source and the detector. During this period, the ray intensity detected by the detector is then processed by computer to obtain the structural information of the object, and a very d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21K1/04
Inventor 刘耀红唐华平高建军阎忻水
Owner NUCTECH CO LTD
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