KR102157233B1 - Nondestructive inspection system using neutron ray and x-ray - Google Patents

Abstract

The present invention, after generating X-rays and neutron rays, the radiation generating unit for irradiating toward the object to be examined; An inspection object moving unit that changes the position of the inspection object; A radiation detection unit configured to detect X-rays and neutron rays that have passed through the object to be examined, respectively; And an imaging system for acquiring image information of the object by using the radiation information detected from the X-rays and the neutron rays transmitted through the object to be inspected.

Description

Non-destructive inspection system using neutron rays and X-rays {NONDESTRUCTIVE INSPECTION SYSTEM USING NEUTRON RAY AND X-RAY}

The present invention relates to a non-destructive inspection system capable of externally analyzing the properties of an object to be inspected using neutron rays and X-rays.

Non-destructive testing means testing the properties of the product from the outside without destroying the product. The non-destructive inspection system refers to a set of equipment that implements non-destructive inspection. Non-destructive testing and non-destructive testing systems are used in various fields such as medical, security, and quarantine.

Examples of non-destructive inspection systems are numerous. One of them is a container scanner using radiation. Through the container search machine, it is possible to quickly inspect cargo or mail at ports or airports, and by irradiating the container loaded with import/export cargo and reading the images obtained therefrom, whether unauthorized items or dangerous goods are loaded inside the container, etc. Can be tested.

Korean Patent Publication No. 10-1304104 (2013.08.29.) discloses a cargo search device that is an example of a container searcher. The cargo retrieval device disclosed in the patent document simultaneously uses X-rays and neutron rays, and uses heterogeneous radiation at the same time, because there is a limitation of cargo retrieval with only one radiation.

For example, when only X-rays are irradiated, the shape of the object to be searched can be seen with the naked eye, but the substance information of the object to be searched is not known, and when only neutron rays are irradiated, the information on the object to be searched However, it is difficult to detect the shape of the object to be examined.

On the other hand, in the conventional non-destructive inspection system using X-ray and neutron rays at the same time, the X-ray detection device and the neutron ray detection device are separated from each other, and in the X-rays generated by the X-ray generator and the neutral ray generator When the generated neutron rays are respectively irradiated to the object, the X-ray detection device detects the X-rays passing through the object to be searched to detect the shape information of the object to be searched, and the neutron ray detection device detects the neutron rays that have passed through the object to be searched. It is configured to detect and detect material information of a search target.

However, since the conventional X-ray image module for X-ray detection and the neutron ray image module for neutron ray detection are manufactured separately from each other, there is a problem in that manufacturing cost increases. In addition, since the two types of radiation are irradiated to the object and then image information of the object should be obtained from the transmitted radiation, the system has to be enlarged.

An object of the present invention is to provide a non-destructive inspection system configured to simultaneously generate neutrons and X-rays, irradiate an object to be inspected, and then acquire image information transmitted to the object to be inspected.

Another object of the present invention is to integrate two conventionally separated configurations into a single device to generate and detect neutrons and X-rays, thereby miniaturizing and reducing the weight of the device to provide a mobile composite radiation non-destructive inspection system. It is for application in development.

In order to achieve the above object, the non-destructive inspection system according to the present invention comprises: a radiation generating unit that generates X-rays and neutron rays and then irradiates them toward an object to be inspected; An inspection object moving unit that changes the position of the inspection object; A radiation detection unit configured to detect X-rays and neutron rays that have passed through the object to be examined, respectively; And an imaging system for acquiring image information of the inspection object by using radiation information detected from X-rays and neutron rays that have passed through the inspection object.

According to an embodiment related to the present invention, the radiation generating unit includes: an electron gun configured to generate an electron beam; An electron accelerator connected to the electron gun and configured to accelerate an electron beam generated from the electron gun; And a target system connected to the electron accelerator and configured to generate radiation by receiving an electron beam accelerated by the electron accelerator.

In this case, the target system, when irradiated with the electron beam, selectively generates at least one of several types of radiation according to at least one variable among a position, a rotation angle, and a number of targets overlapping on the path of the electron beam. Multiple radiation generating target mixtures formed; And a driving unit that provides a driving force to change at least one of a position of the multiple radiation-generating target mixture, a rotation angle, and the number of targets disposed to overlap on the path of the electron beam.

In addition, the multiple radiation generating target mixture is formed as a plate divided into a plurality of areas, targets generating different types of radiation are disposed at least one for each area of the plate, and the driving unit It is connected to the radiation-generating target mixture, and may be configured to determine a target to be irradiated with the electron beam by rotating the multiple radiation-generating target mixture.

In this case, the plate may be configured as a disc, the targets may be formed in a fan shape, and the driving unit may be configured to be connected to the center of the disc by the rotation shaft.

According to an embodiment related to the present invention, the radiation generating unit further includes a trigger system configured to synchronize the electron gun, the electron accelerator, and the target system, wherein the trigger system includes: the electron beam generation rate of the electron gun It may be configured to generate a synchronization signal for changing at least one of the positions of the targets, the rotation angle of the targets, and the number of targets superimposed on the path of the electron beam.

According to an embodiment related to the present invention, the inspection object moving unit includes: a disk plate on which the inspection object is located; A support column coupled to a lower portion of the disk plate to form a behavior of the disk plate; And a leg installed at the lower end of the support column to support the ground.

In this case, a motor may be installed inside the support column to enable vertical translation of the disk plate and rotational movement in a clockwise or counterclockwise direction.

According to an embodiment related to the present invention, the radiation detection unit includes: a synchronization unit that generates a synchronization signal when X-rays and neutron rays are irradiated with a time difference from the radiation generation unit; And a radiation detection unit that detects the X-ray or neutron ray according to the synchronization signal.

In this case, the synchronization unit may be configured to synchronize the timing of irradiation of the X-ray or neutron beam of the radiation generating unit and the detection timing of the radiation detection unit with each other.

According to an embodiment related to the present invention, it may further include a radiation detection unit installed adjacent to the moving portion of the object to be examined, configured to detect radiation generated from the object to be examined.

In addition, to limit external leakage of X-rays or neutron rays, a shielding portion formed around the X-rays or neutron rays may be further included.

According to an exemplary embodiment related to the present invention, the X-rays and neutron rays may be generated alternately from the radiation generating unit with a preset time difference and irradiated toward the radiation detection unit.

According to an embodiment related to the present invention, the radiation detection unit may be configured to be synchronized with an irradiation time of X-rays or neutron rays of the radiation generating device to detect X-rays and neutron rays that have passed through the object to be examined.

In this case, the radiation detector may include a radiation detector body extending in a vertical direction and formed in a rectangular column shape; And a plurality of radiation image sensor modules installed to be stacked inside the body of the radiation detection unit to detect X-rays and neutron rays irradiated from the radiation generation unit.

The non-destructive inspection system according to the present invention will be described as follows.

The radiation generating unit may generate X-rays and neutron rays at the same time, and after transmitting them to the object, it is possible to classify a substance of the object to be examined based on the transmitted image information.

In addition, X-rays and neutron rays are alternately irradiated from the radiation generation unit with a time difference, and the radiation generation unit and the radiation detection unit are synchronized to separate and process two signals, X-rays and neutron rays, while maintaining high resolution. Images containing material information can be implemented.

In addition, since it is differentiated from the technology that only depended on X-rays, it is possible to grasp material information using neutrons, and by the non-destructive inspection system having a compact structure, it can be used for security screening for building a social safety net.

1 is a conceptual diagram showing a non-destructive inspection system according to the present invention.
Fig. 2 is a conceptual diagram showing the interior of a radiation generating unit.
3 is a conceptual diagram showing a state of a target system.
4 is a perspective view showing a state of an object moving part.
Fig. 5 and Fig. 1 are conceptual diagrams showing a non-destructive system viewed from the side.
6 is a diagram showing another embodiment of the non-destructive inspection system 100 according to the present invention.
7 is a flowchart illustrating a process of acquiring image information through X-rays and neutron rays transmitted through an object to be examined.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used interchangeably in consideration of only the ease of preparation of the specification, and do not have meanings or roles that are distinguished from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all modifications included in the spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various elements, but the elements are not limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

1 is a conceptual diagram showing a non-destructive inspection system 100 according to the present invention.

The non-destructive inspection system 100 refers to external inspection of the properties of the product without destroying the product, and refers to a set of equipment for implementing the non-destructive inspection. The non-destructive inspection system 100 can be used in various fields such as medical care, security, and quarantine, and in particular, a container for searching for air baggage, inspection of cargo or mail at ports or airports, and containers loaded with import and export cargo. It can be applied to search devices.

The non-destructive inspection system 100 refers to a system that irradiates radiation to the inspection object 10 and obtains an internal image of the inspection object 10 through transmitted radiation information. Here, the inspection object 10 may mean various things such as air luggage, a container, and a traveler's bag for a security search object.

The non-destructive inspection system 100 according to the present invention is configured to detect the X-ray 11 and the neutron beam 12 that have passed through the inspection object 10 and obtain image information about the inspection object 10. The non-destructive inspection system 100 is configured to include a radiation generation unit 110, an object moving unit 120, a radiation detection unit 130, and an imaging system (not shown).

The radiation generating unit 110 is configured to generate an X-ray 11 and a neutron ray 12 integrally and irradiate the object 10 to be inspected. At this time, the X-ray 11 may be irradiated to the object 10 to search for shape information of the object 10, and the neutron ray 12 is used for material information of the object 10, for example, It can be investigated to search for PVC, Graphite, Sugar, Wood, Glass, radioactive materials, Al, Fe, Pb, etc.

The radiation generating unit 110 is configured to generate radiation, for example, after accelerating the electron beam generated by the electron gun 112 (refer to FIG. 2) in the electron accelerator 113, the accelerated electron beam is applied to the target 114 ) To form radiation from the target. Details on this will be described later.

The object moving unit 120 serves to change the position of the object 10, and moves the object 10 positioned on the object moving unit 120 vertically or in a clockwise or counterclockwise direction. By rotating it, it serves to irradiate the radiation to the object 10.

The radiation detection unit 130 serves to detect each of the X-rays 11 and neutron rays 12 generated from the radiation generation unit 110 after passing through the object 10 to be inspected. The radiation detection unit 130 is configured to include a radiation detection unit main body 131 and a plurality of radiation image sensor modules 132.

The imaging system (not shown) plays a role of generating an image based on the result detected by the radiation detection unit 130, and is based on the X-rays 11 and neutron rays 12 transmitted through the object 10. Thus, it is made to play a role of generating an image of the inspection object 10.

2 is a conceptual diagram showing the interior of the radiation generating unit 110.

The radiation generation unit 110 is formed to selectively generate at least one of several types of radiation. The radiation generation unit 110 is configured to alternately generate X-rays 11 and neutron rays 12 among various types of radiation with a time difference. For example, the X-ray 11 and the neutron ray 12 may be configured to be irradiated alternately with a time difference of 300 to 400 Hz.

The radiation generation unit 110 does not require equipment for each type of radiation to generate various types of radiation, but only requires one electron gun, one electron accelerator, and a multiple radiation generating target mixture.

In addition, the radiation generating unit 110 may include at least one collimator (not shown). The collimator (not shown) is disposed between the target and the radiation detection unit 130 and serves to process the radiation generated from the target system 114 to be described later to be suitable for non-destructive inspection.

The radiation generator 110 may be configured to include an electron gun 112, an electron accelerator 113, and a target system 114.

The electron gun 112 generates an electron beam E, and the electron gun 112 includes an electrode, and when a current is applied to the electrode, the electron beam E can be generated.

The electron accelerator 113 is formed to accelerate the electron beam E generated from the electron gun 112. The electron beam E is accelerated while sequentially passing through a buncher cavity and an acceleration cavity provided in the electron accelerator 113.

The target system 114 is formed to generate radiation by receiving the electron beam E accelerated by the electron accelerator 113. The electron gun 112, the electron accelerator 113, and the target system 114 are sequentially connected and maintain a high vacuum state. The electron accelerator 113 and the target system 114 are connected by a high vacuum flange 116.

The target system 114 of the present invention may generate at least one of several types of radiation by receiving an electron beam E generated from one electron gun 112 and accelerated from one electron accelerator 113. The target system 114 includes a multiple radiation generating target mixture 114a and a driving unit 114b to selectively generate at least one of several types of radiation.

The multiple radiation generating target mixture 114a may selectively generate at least one of several types of radiation according to variables. Here, multiple radiation may mean X-rays and neutrons. Target mixture means having a plurality of targets that generate any one radiation. In addition, the variable may mean at least one of a position, a rotation angle, a number of targets, and a type of target of the multiple radiation generating target mixture 114a.

The driving unit 114b provides a driving force to be able to change at least one of the position of the multiple radiation generating target mixture 114a, the rotation angle, and the number of targets disposed to overlap on the path of the electron beam E. When the variable is the position, the driving unit 114b moves the multiple radiation-generating target mixture 114a to change the position of the multiple-radiation-generating target mixture 114a. When the variable is the rotation angle, the driving unit 114b rotates the multiple radiation generation target mixture 114a to change the rotation angle of the multiple radiation generation target mixture 114a. When the variable is the number of targets superimposed on the path of the electron beam E, the driving unit 114b causes at least some of the targets to be placed on the path of the electron beam E or on the path of the electron beam E. To deviate from Accordingly, the driving unit 114b changes the number of targets disposed to overlap on the path of the electron beam E.

The target system 114 further includes a trigger system 115. For example, the signal generator may be used as the trigger system 115. The type of radiation generated from the radiation generating unit 110 is determined according to which target of the target system 114 the electron beam E strikes. Accordingly, in order to adjust the type or generation period of radiation generated from the radiation generating unit 110, the electron gun 112, the electron accelerator 113, and the target system 114 must be synchronized.

3 is a conceptual diagram showing a state of the target system 114.

The multiple radiation generating target mixture 114a may be formed of a circular plate divided into a plurality of regions. At least one targets 114a1, 114a2, 114a3 may be disposed in each region of the plate.

As shown in FIG. 3, the multiple radiation generating target mixture 114a may be divided into three regions. If the targets 114a1, 114a2, and 114a3 are disposed one by one for each area, each of the targets 114a1, 114a2, and 114a3 may be formed in a fan shape.

Each of the targets 114a1, 114a2, 114a3 is formed to generate different types of radiation. For example, a target for generating X-rays may be disposed in the first area, a target for generating neutrons may be disposed in the second area, and the third area is an electron beam (E) which is an empty area so that the electron beam E passes without colliding. ) Can be formed as a target for occurrence.

Since the non-destructive inspection system 100 according to the present invention is configured to generate X-rays and neutron rays through the radiation generation unit 110, a target for generating X-rays is disposed in the first area, and the neutrons are in the second area. A target for generating may be disposed, and it would be preferable to place a target for generating an electron beam E in an empty area in the third area.

How many areas the disc-shaped multiple radiation-generating target mixture 114a will be divided into, what the size of each area will be, and which targets will be placed in each area can be determined according to the design of the radiation generating unit 110. There will be.

The driving unit 114b is composed of a motor that generates rotational force. When the motor is connected to the center of the disk by the rotation shaft 114c, the rotational force generated by the motor may be transmitted to the multiple radiation generating target mixture 114a through the rotation shaft 114c. Accordingly, the multiple radiation generating target mixture 114a may be rotated around the rotation axis 114c.

The electron beam E is not irradiated toward the center of the multiple radiation generating target mixture 114a, but is irradiated at a position eccentric from the center. The multiple radiation generating target mixture 114a is installed at a position eccentric from the center and at a position capable of receiving the electron beam E.

Which targets 114a1, 114a2, 114a3 are irradiated with the electron beam E is determined by the rotation angle of the multiple radiation generating target mixture 114a. For example, the driving unit 114b may determine the targets 114a1, 114a2, and 114a3 to which the electron beam E is irradiated by rotating the multiple radiation generating target mixture 114a.

In the previous example, when the electron beam E collides with the first region as the multiple radiation generating target mixture 114a rotates, X-rays are generated. Similarly, when the electron beam E collides with the second region, neutrons are generated. When the electron beam E collides in the third area, the electron beam E just passes.

The trigger system 115 generates a synchronization signal for changing the rotation angle of the targets 114a1, 114a2, 114a3 in accordance with the generation rate of the electron beam E of the electron gun 112. The driving unit 114b changes the rotation angle of the targets 114a1, 114a2, 114a3 based on the synchronization signal generated by the trigger system 115. When the electron gun 112, the electron accelerator 113, and the target system 114 are synchronized by the trigger system 115, the type of radiation generated from the radiation generating unit 110 and the generation period of the radiation can be controlled. do.

For example, if the first region, the second region, and the third region all have the same size, the central angle of the sector is 120°. And assume that the repetition rate of the electron beam E is 300 Hz. If the rotation speed of the multi-radiation-generating target mixture 114a by the trigger system 115 is synchronized to 300 Hz as the electron beam E generation repetition rate, different types of radiation may be generated once per 100 Hz.

As described above, the size of the target (center angle of the fan shape), the type of the target, the rotation angle of the multiple radiation generation target mixture 114a, the rotation speed of the multiple radiation generation target mixture 114a, etc. are determined by the radiation generated in the radiation generation unit 110. It can be a variable that determines the type of radiation and the generation cycle of radiation.

4 is a perspective view illustrating a state of the object moving unit 120.

The non-destructive inspection system 100 irradiates X-rays and neutron rays generated from the radiation generating unit 110, and moves the object 10 up and down through the object moving unit 120 or in one direction (clockwise). Or counterclockwise) to obtain image information on the object 10.

The inspection object moving unit 120 includes a disk plate 121 on which the inspection object 10 is located, and a support column 123 that is coupled to a lower portion of the disk plate 121 to form the behavior of the disk plate 121, It is installed at the lower end of the support pillar 123 is made to include a leg 124 made to support the ground.

The disk plate 121 may be separated from the disk frame 122 to the upper portion and protrude. The support pillar 123 serves to form the behavior of the disk plate 121 and may be stretched or contracted in length. When the length of the support column 123 is stretched, the disk plate 121 may be separated from the disk frame 122 and may protrude upward. Through this, the object 10 positioned on the original plate 121 is translated vertically so that the radiation can be irradiated to all areas of the upper and lower heights of the object 10.

In addition, the disk plate 121 enables a rotational movement of the disk plate 121 in a clockwise or counterclockwise direction through a motor (not shown) positioned inside the support column 123. Through this, the radiation can be irradiated at an angle corresponding to the entire area of the object 10.

It is a conceptual diagram showing a state viewed from the side of the non-destructive system 100 of FIGS. 5 and 1.

The radiation detector 130 may be disposed opposite the moving part 120 to face the radiation generating part 110.

The radiation detection unit 130 is configured to include a radiation detection unit main body 131, a radiation image sensor module 132, and a synchronization unit (not shown).

The radiation detector main body 131 may be configured in the form of a rectangular pillar extending in a vertical direction. The radiation detection unit main body 131 allows radiation to be irradiated through the front surface based on the direction in which the radiation is irradiated.

A plurality of radiation image sensor modules 132 may be installed to be stacked inside the body 131 of the radiation detection unit. At this time, each radiation image sensor module 132 may be stacked to have a predetermined curvature so as to be closer to the front surface from the bottom surface of the radiation detection unit body 131 in order to prevent distortion when detecting radiation. I can.

A plurality of radiation image sensor modules 132 positioned below the radiation detection unit main body 131 are disposed adjacent to the rear surface of the radiation detection unit main body 131, and are disposed above the radiation detection unit main body 131. The image sensor module 132 may be installed adjacent to the front surface of the body 131 of the radiation detection unit. The plurality of radiation image sensor modules 132 may be disposed to be spaced apart from the radiation generating unit 110 by a substantially similar distance.

The plurality of radiation image sensor modules may include an X-ray scintillator (not shown), a neutron scintillator (not shown), and a photo detector (not shown).

An X-ray scintillator (not shown) is made to emit a scintillation caused by the X-ray 11 by interacting with the X-ray 11, and the electrons excited by absorbing energy from the incident X-ray 11 As it returns to the ground state, it emits an electromagnetic wave with a wavelength corresponding to the energy difference between the excited state and the ground state to generate light.

The neutron scintillator (not shown) is configured to interact with the neutron beam 12 to emit a scintillation caused by the neutron beam 12. The neutron scintillator (not shown) absorbs energy from the incident neutron beam, becomes excited, and then returns to the ground state by emitting an electromagnetic wave with a wavelength corresponding to the energy difference between the excited state and the ground state. .

The photodetector (not shown) is equipped with an X-ray scintillator and a neutron scintillator on both sides of a substrate through a semiconductor process, absorbs the scintillation generated from the X-ray scintillator or neutron scintillator, and converts light energy into electrical energy to generate current. Occurs. Through this, the photodetector can detect radiation containing material and image information, respectively, passing through the object to be searched.

The synchronization unit (not shown) serves to synchronize the radiation generation unit 110 and the radiation detection unit 130. The synchronization unit receives a signal from the radiation generating unit and outputs a synchronization signal with an X-ray or neutron signal. The photodetector (not shown) may receive a synchronization signal and detect a signal corresponding to an X-ray or a neutron.

For example, when the X-ray 11 is irradiated from the radiation generating unit 110, the synchronization unit (not shown) outputs a synchronization signal corresponding to the X-ray 11 and sends it to the photodetector, and the photodetector By detecting the X-ray scintillation generated from the X-ray scintillator, an image containing shape information may be implemented by a signal detected from the photodetector.

When the neutron beam 12 is irradiated from the radiation generator 110, the synchronization system (not shown) outputs a synchronization signal corresponding to the neutron beam and sends it to the photodetector, and the photodetector transmits the neutron beam flash generated by the neutron beam. By detecting, it is possible to implement an image containing material information by a signal detected from the photodetector.

X-rays 11 and neutron rays 12 are generated and irradiated alternately with each other at a time difference in the radiation generating unit, and the radiation detection unit receives a synchronization signal from a synchronization unit (not shown) to detect X-rays or neutron rays. The point of view is synchronized with the point of irradiation of the X-ray or neutron ray of the radiation generating unit so that the X-ray detection signal and the neutron ray detection signal can be distinguished.

Incident signals of X-rays and neutrons and detection signals of X-rays and neutrons are synchronized with each other and can be arranged in a one-to-one correspondence, and the X-ray image sensor module and the neutron ray image sensor module are composed of a single sensor. Since simultaneous detection of X-rays and neutron rays is possible, images containing material information can be implemented while maintaining the existing resolution.

Accordingly, since the non-destructive inspection system 110 can be implemented by combining each of the X-ray detection unit and the neutron ray detection unit into one radiation detection unit 130, it is possible to reduce the size and weight of the non-destructive inspection system.

6 is a diagram showing another embodiment of the non-destructive inspection system 100 according to the present invention.

The non-destructive inspection system 100 according to the present invention is configured to detect the X-ray 11 and the neutron beam 12 that have passed through the inspection object 10 and obtain image information about the inspection object 10. The non-destructive inspection system 100 includes a radiation generating unit 110, an object moving unit 120, a radiation detection unit 130, an imaging system (not shown), a shielding unit (not shown), and a radiation detection unit 140. It is made to include.

The radiation generating unit 110 is configured to generate an X-ray 11 and a neutron ray 12 integrally and irradiate the object 10 to be inspected. At this time, the X-ray 11 may be irradiated to the object 10 to search for shape information of the object 10, and the neutron ray 12 is used for material information of the object 10, for example, It can be investigated to search for PVC, Graphite, Sugar, Wood, Glass, radioactive materials, Al, Fe, Pb, etc.

The radiation generating unit 110 is configured to generate radiation. For example, after accelerating the electron beam generated by the electron gun 112 (refer to FIG. 2) by the electron accelerator 113, the accelerated electron beam is applied to the target system ( 114) to form radiation from the target.

The object moving unit 120 serves to change the position of the object 10, and moves the object 10 positioned on the object moving unit 120 vertically or in a clockwise or counterclockwise direction. By rotating it, it serves to irradiate the radiation to the object 10.

The radiation detection unit 130 serves to detect each of the X-rays 11 and neutron rays 12 generated from the radiation generation unit 110 after passing through the object 10 to be inspected. The radiation detection unit 130 is configured to include a radiation detection unit main body 131 and a plurality of radiation image sensor modules 132.

The imaging system (not shown) plays a role of generating an image based on the result detected by the radiation detection unit 130, and is based on the X-rays 11 and neutron rays 12 transmitted through the object 10. Thus, it is made to play a role of generating an image of the inspection object 10.

The radiation detection unit 140 is installed in the moving unit 120 to be inspected and serves to detect radiation generated from the inspection object 10. The radiation detector 140 may mean a gamma camera or a Compton camera.

In addition, the non-destructive inspection system according to the present embodiment is configured to further include a shield (not shown) formed around the X-rays or neutron rays to limit external leakage of X-rays or neutron rays. I can. The shield may be made to form a closed space with thick metal walls on all sides, so as to prevent radiation from being emitted to the surroundings.

7 is a flowchart illustrating a process of acquiring image information through X-rays and neutron rays that have passed through the object 10 to be inspected.

As described above, the imaging system (not shown) serves to generate an image based on the result detected by the radiation detection unit 130, and the X-rays 11 and neutron rays transmitted through the object 10 Based on (12), it plays a role of generating an image of the inspection object 10.

When the X-rays 11 and the neutron rays 12 generated by the radiation generating unit 110 are transmitted to the object to be inspected, the radiation detection unit 130 acquires X-ray image information and neutron ray image information.

Since the X-rays 11 mainly react with electrons in the substance, the attenuation coefficient is determined by the atomic number of the substance. Since neutron rays mainly react with hydrogen in a substance, the attenuation coefficient is determined according to the distribution of hydrogen. After obtaining a substance classification coefficient (R-value) through image information on an object to be inspected by such complex radiation, an image capable of distinguishing approximately 20 or more substances is obtained.

Separately, the radiation detection unit 140 is installed adjacent to the moving unit 120 to be inspected, and serves to detect radiation generated from the object to be inspected 10, and image information therefrom after detecting the radioactive material. Is obtained.

After that, after combining the material classification image by the complex radiation and the image information acquired by the radiation detector, the final image information on the object 10 is obtained, so that information on the object 10 can be obtained. do.

The non-destructive inspection system described above is not limited to the configuration and method of the above-described embodiments, and the embodiments may be configured by selectively combining all or part of each of the embodiments so that various modifications can be made.

10: test object 11: X-ray
12: neutron beam 100: non-destructive inspection system
110: radiation generating unit 112: electron gun
113: electronic accelerator 114: target system
115: trigger system 120: object moving unit
121: disk plate 122: disk frame
130: radiation detection unit 131: radiation detection unit main body
132: radiation image sensor module 140: radiation detection unit

Claims (15)

A radiation generating unit that generates X-rays and neutron rays and then irradiates them toward the object to be examined;
An inspection object moving unit that changes the position of the inspection object;
A radiation detection unit configured to detect X-rays and neutron rays that have passed through the object to be examined, respectively; And
An imaging system for acquiring image information of the inspection object by using radiation information detected from X-rays and neutron rays transmitted through the inspection object,
The radiation detection unit is configured to be synchronized with an irradiation point of X-rays or neutron rays of the radiation generating unit to detect X-rays and neutron rays that have passed through the inspection object,
The radiation detector may include a radiation detector body extending in a vertical direction and formed in a rectangular column shape; And
A plurality of radiation image sensor modules installed to be stacked in the body of the radiation detection unit to detect X-rays and neutron rays irradiated from the radiation generation unit,
The radiation image sensor module,
X-ray scintillators that interact with X-rays to emit scintillation;
A neutron scintillator that interacts with a neutron beam and emits a flash; And
The X-ray scintillator and the neutron scintillator are mounted on both sides of the substrate, respectively, and a non-destructive inspection system comprising a photodetector configured to generate a current by absorbing the scintillation generated from each scintillator. The method of claim 1,
The radiation generating unit,
An electron gun configured to generate an electron beam;
An electron accelerator connected to the electron gun and configured to accelerate an electron beam generated from the electron gun; And
And a target system connected to the electron accelerator and configured to generate radiation by receiving an electron beam accelerated by the electron accelerator. The method of claim 2,
The target system,
Multiple radiation-generating target mixture formed to selectively generate at least one of several types of radiation according to at least one variable of a position, a rotation angle, and the number of targets overlapping on the path of the electron beam when irradiated with an electron beam ; And
And a driving unit that provides a driving force to change at least one of a position of the multiple radiation generating target mixture, a rotation angle, and a number of targets overlapping on the path of the electron beam. The method of claim 3,
The multiple radiation generating target mixture is formed as a plate partitioned into a plurality of regions,
At least one target that generates different types of radiation is arranged in each area of the plate,
The driving unit is connected to the multi-radiation-generating target mixture by a rotating shaft, and is formed to determine a target to be irradiated with the electron beam by rotating the multi-radiation-generating target mixture. The method of claim 4,
The plate is composed of a disk,
Each of the targets is formed in a fan shape,
The driving unit is a non-destructive inspection system, characterized in that connected to the center of the disk by the rotation shaft. The method of claim 3,
The radiation generating unit,
Further comprising a trigger system configured to synchronize the electron gun, the electron accelerator and the target system,
The trigger system generates a synchronization signal for changing at least one of a position, a rotation angle of the targets, and the number of targets overlapped on the path of the electron beam according to the electron beam generation speed of the electron gun. system. The method of claim 1,
The inspection object moving part,
A disk plate on which the object to be inspected is located;
A support column coupled to a lower portion of the disk plate to form a behavior of the disk plate; And
Non-destructive inspection system, characterized in that it comprises a leg installed at the lower end of the support column to support the ground. The method of claim 7,
A non-destructive inspection system, characterized in that a motor is installed on the inside of the support column to enable vertical translation of the disk plate and rotational movement in a clockwise or counterclockwise direction. The method of claim 1,
The radiation detection unit,
A synchronization unit generating a synchronization signal upon irradiation of X-rays and neutron rays with a time difference from the radiation generator; And
And a radiation detection unit that detects the X-ray or neutron ray according to the synchronization signal. The method of claim 9,
The synchronization unit is a non-destructive inspection system, characterized in that the timing of irradiation of the X-rays or neutron rays of the radiation generating unit and the detection timing of the radiation detection unit to each other. The method of claim 1,
And a radiation detector installed adjacent to the moving part of the test object and configured to detect radiation generated from the test target. The method of claim 11,
Non-destructive inspection system, characterized in that it further comprises a shield formed around the X-ray or neutron ray traveling path to limit external leakage of the X-ray or neutron ray. The method of claim 1,
The X-ray and the neutron ray are generated alternately from the radiation generating unit at a predetermined time difference and irradiated toward the radiation detection unit. delete delete

Images