KR102284602B1 - A security inspection device using neutron ray and x-ray - Google Patents

Abstract

The present invention relates to a security screening apparatus using neutron rays and X-rays, comprising: a radiation generating unit for generating the X-rays and the neutron rays, respectively, and irradiating the same toward an examination object; an examination object transfer unit for changing a position of the examination object; a shielding unit installed along a path of the X-rays and the neutron rays to limit interference between the X-rays and the neutron rays; and a radiation detection unit positioned on an opposite side of the radiation generating unit with the examination object interposed therebetween and configured to respectively detect the X-rays and the neutron rays which pass through the examination object. The shielding unit may be installed in front of the radiation detection unit along the path of the X-rays and the neutron rays to selectively transmit the X-rays and the neutron rays. An object of the present invention is to provide the security screening apparatus capable of acquiring image information of the examination object.

Description

A SECURITY INSPECTION DEVICE USING NEUTRON RAY AND X-RAY

The present invention relates to a security screening device capable of detecting a dangerous object using radiation.

Recently, non-destructive testing has been used in various fields such as medical care, security, and quarantine. Non-destructive testing means testing the internal properties of a product from the outside without destroying it.

As one example of a non-destructive inspection system for such non-destructive inspection, there is a security inspection device for discriminating illegal weapons such as guns, knives, swords, etc. that can be visually confirmed using radiation or contraband. The security screening device irradiates the inspection object that can load import and export cargo to enable rapid inspection of cargo or mail in ports and airports, and acquires and reads the image of the inspection object through the information obtained therefrom, It refers to a device that inspects whether permitted items or dangerous substances are loaded.

In general, a security screening device detects a dangerous object using image information obtained by passing X-rays. However, when image information is acquired using only X-rays, the shape of the search target can be seen with the naked eye, but material information cannot be known.

Accordingly, in the prior art, it was attempted to secure material information of the inspection object by additionally irradiating a neutron beam toward the inspection object. cost will increase. In addition, since such a system has a structure in which each of two types of radiation is irradiated to an object to be examined and then image information of the object is obtained from the transmitted radiation, there is a problem in that the system needs to be enlarged.

At the same time, when neutron beams are additionally irradiated toward the object to secure material information of the object, interference occurs between neutrons and x-rays that have passed through the object to act as noise. Therefore, there is a problem in that the quality of image information of the test object is lowered. Accordingly, even when neutron beams are used, it is difficult to obtain information on the object to be tested when the shape of the object is made of a similar material.

In particular, dangerous substances such as explosives, narcotics, nuclear substances, and terrorist radiation are composed of powders or liquids whose shape is difficult to specify, so when loaded with cargo made of substances having a similar shape (e.g., explosives in flour bags) It is difficult to distinguish with security screening devices.

In this case, an interference phenomenon that may occur between transmitted x-rays and neutron beams while rapid inspection of cargo or mail is performed at ports or airports using the transmitted x-rays and neutron beams, respectively, through the security screening device A new method is required to secure the quality of image information of substances by reducing

One object of the present invention is to generate an x-ray and a neutron beam integrally in one device, and after irradiating it to the inspection object, a security search capable of acquiring image information of the inspection object using the transmitted x-ray and neutron beam to provide the device.

Another object of the present invention is to provide a security screening device that is capable of generating radiation having different energies by one device, and that can be miniaturized and lightweight by integrating what is separated into several devices into one device. it is for

Another object of the present invention is to provide a security search apparatus capable of improving the quality of image information by reducing mutual interference between x-rays and neutron beams that have passed through an object to be inspected.

Another object of the present invention is to provide a security search device capable of tracing the location of a hazardous material by precisely analyzing gamma-ray spectroscopy generated through neutron radiation analysis.

In order to achieve the above object, the security screening device according to the present invention, the radiation generating unit for irradiating toward the inspection object after generating each X-ray and neutron beam; an examination object transfer unit for changing the position of the examination object; a shielding unit installed on a path of the X-ray and the neutron beam, and selectively transmitting the X-ray and the neutron beam to limit interference between the X-ray and the neutron beam; and a radiation detection unit positioned on the opposite side of the radiation generating unit with the examination object interposed therebetween and configured to respectively detect X-rays and neutron rays that pass through the examination object and then proceed.

According to an embodiment related to the present invention, the radiation detector may include: an x-ray detector configured to acquire image information about a shape of the object from the X-ray that has passed through the object; and a neutron beam detection unit disposed adjacent to the X-ray detection unit and configured to acquire image information regarding material information of the inspection object from the neutron beam that has passed through the inspection object.

According to an embodiment related to the present invention, the x-ray detector and the neutron beam detector may be integrally formed.

According to an embodiment related to the present invention, the x-ray detector and the neutron beam detector may be spaced apart from each other while forming a predetermined angle. For example, the x-ray detector and the neutron beam detector may be disposed in a direction crossing each other, and may be disposed at an angle of approximately 90 degrees.

According to an embodiment related to the present invention, the shielding unit, an X-ray shielding unit installed adjacent to the front of the neutron ray detection unit to absorb X-rays; and a neutron ray shielding part installed to be spaced apart from the X-ray shielding part by a predetermined distance, positioned adjacent to the front of the x-ray detection part, and configured to shield the neutron beam.

According to an embodiment of the present invention, the control unit further includes a control unit for transmitting a synchronization signal to the radiation generating unit and the radiation detecting unit, respectively, so that the radiation generating unit and the radiation detecting unit are synchronized with each other, wherein the control unit comprises: - A signal for distinguishing the time at which the x-rays reaching the neutron beam detector and the neutron beams reaching the neutron beam detector are detected may be transmitted.

According to an exemplary embodiment of the present invention, a gamma ray detection unit installed adjacent to the examination object and configured to detect a gamma ray signal generated from the examination object may be further included.

According to the present invention having the above configuration, it is possible to simultaneously generate X-rays and neutron beams generated from the radiation generating unit and transmit them to the examination object, and secure image information of the examination object through the transmitted radiation to obtain the image information of the examination object. Substance discrimination will be possible.

In addition, through the structure of the radiation generating unit, it is possible to selectively generate x-rays and neutron rays, and since separate devices for generating x-rays and neutron rays are unnecessary, it will be possible to reduce the installation space and reduce the manufacturing cost. .

In addition, after transmitting radiation having different energies to the object, through a radiation detector that can detect the x-rays and neutron rays transmitted through the object, respectively, a security search capable of acquiring image information about the object You can configure the device.

In addition, the occurrence of interference between the x-rays and the neutron rays passing through the object may be restricted through the shielding unit, and thus the quality of an image for analysis of the object may be secured. In addition, by adjusting the position of the shielding part, it is possible to limit the occurrence of mutual interference between the x-ray and the neutron beam passing through the object.

In addition, high resolution by irradiating X-rays and neutron beams alternately with a time difference from the radiation generator, synchronizing the radiation generator and the radiation detector with each other, and processing information by X-rays and neutron beams separately according to the synchronization signal It is possible to implement an image containing material information while maintaining will do

1 is a conceptual diagram showing a state of a security search apparatus.
2 is a conceptual diagram schematically illustrating a process of obtaining image information of an object to be inspected according to an operation of a security search device.
3 is a conceptual diagram illustrating a state of a radiation generating unit.
4 : is a perspective view which shows the mode of a target apparatus.
5 is a side cross-sectional view of the target device.
6 : is a figure which shows the mode of a shielding part.
7 is a conceptual view of the security search apparatus as viewed from above.
8 (a) and (b) are enlarged views of the radiation detection unit, respectively, and respectively show the neutron beam detection unit and the x-ray detection unit.
9 is a view showing a state of a security search apparatus according to another embodiment of the present invention.
10 is a view showing a state of a security search apparatus according to another embodiment of the present invention.
11 is a conceptual diagram schematically illustrating a process of obtaining final information of an object to be inspected according to an operation of a security search device.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

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

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

FIG. 1 is a conceptual diagram illustrating an appearance of a security search apparatus 100 , and FIG. 2 is a conceptual diagram schematically illustrating a process of obtaining image information of an object 10 according to an operation of the security search apparatus 100 .

The security search apparatus 100 as shown in FIG. 1 is an example of a non-destructive inspection system. The non-destructive inspection system refers to a set of equipment for implementing non-destructive inspection, which means that the internal properties of a product are inspected from the outside without destroying the product. The non-destructive inspection system can be used in various fields such as medical care, security, quarantine, etc. In particular, a security screening device ( 100) can be used.

The security search apparatus 100 refers to a system for irradiating radiation to the examination object 10 and obtaining information about the examination object 10 by using 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 target.

The security search apparatus 100 refers to a system configured to acquire image information about the object 10 by detecting radiation having different energies that have passed through the object 10 .

As shown in FIG. 1 , the security screening apparatus 100 includes a radiation generating unit 110 , a radiation detecting unit 130 , an object transfer unit 140 , a shielding unit 150 , and an imaging system (not shown). can do.

The radiation generator 110 generates radiation having different energies and serves to irradiate the radiation toward the object 10 . Here, the radiation having different magnitudes of energy may mean X-rays and neutron rays, respectively.

The radiation generator 110 according to the present invention may integrally generate X-rays and neutron beams having different energies, and may irradiate them toward the object 10 . X-rays may be irradiated to the object 10 to obtain image information about the shape of the object 10 , and neutron rays are information on the material of the object 10 , for example, PVC, graphite , Sugar, Wood, Glass, radioactive material, Al, Fe, Pb, etc. can be used to search.

The radiation generator 110 accelerates the electron beam E generated from the electron gun 112 (refer to FIG. 3) by the electron accelerator 113, and then collides the accelerated electron beam with the target device 120 to form radiation. there is. The radiation generating unit 110 may also generate radiation having different energies as pulsed radiation, respectively.

As shown in FIG. 2 , the radiation generating unit 110 may form low-energy radiation and high-energy radiation to have a pulse-shaped signal, respectively, and alternately apply low-energy radiation and high-energy radiation to each other. After generating, it is irradiated toward the test object (10). Here, radiation having a low energy may mean X-rays, and radiation having a high energy may mean a neutron beam.

The object transfer unit 140 serves to change the position of the object 10 , and it is possible to move the object 10 positioned on the object transfer unit 140 up and down or left and right.

X-rays and neutron beams generated from the radiation generator 110 are transmitted toward the object 10 moving by the object transfer unit 140, respectively, so that information about the object 10 can be obtained. do.

The radiation detection unit 130 serves to detect X-rays and neutron beams that have passed through the object 10, respectively. The radiation detector 130 serves to detect each radiation after the X-rays and neutron beams generated from the radiation generator 110 are transmitted through the object 10 .

The radiation detector 130 may include a neutron beam detector 131 and an x-ray detector 132 , and the neutron beam detector 131 and the x-ray detector 132 each include a plurality of radiation image sensor modules 131a, 132a).

The x-ray detector 132 serves to obtain image information about the shape of the object 10 from the X-ray that has passed through the object 10 .

The neutron beam detector 131 is disposed adjacent to the X-ray detector 132 , and serves to acquire image information regarding material information of the object 10 from the neutron beam that has passed through the object 10 .

The x-ray detector 132 and the neutron beam detector 131 may be integrally formed to constitute the radiation detector 130 .

The x-ray detection unit 132 and the neutron beam detection unit 131 may be spaced apart from each other while forming a predetermined angle in correspondence to the path of the x-ray and the neutron beam passing through the object 10 . Specifically, the x-ray detection unit 132 and the neutron beam detection unit 131 may be disposed in a direction that intersects with each other, and in this case, it will be possible to have an angle of approximately 90 degrees. In this case, the information by the X-rays and the neutron beams detected by the X-ray detector 132 and the neutron beam detector 131 can be separated and processed without interference, so that high image quality for analysis of the test object will be able to obtain

The security search apparatus 100 according to the present invention may further include a shielding unit 150 .

The shielding unit 150 is installed along a path of X-rays and the neutron beam, and serves to limit interference between the X-rays and the neutron beam. The shielding unit 150 is installed along the path of the X-rays and the neutron beams passing through the object 10, and serves to limit the interference between the X-rays and the neutron beams. Here, the shielding part 150 may mean a collimator.

Specifically, the shielding unit 150 includes a radiation generator (RG) collimator that is installed adjacent to the radiation generator 110, a pre-object collimator that is positioned immediately before radiation is irradiated to the object 10, and the object ( 10) may be configured as a detector collimator positioned just before the radiation that has passed through is detected by the radiation detector 130 .

The shielding unit 150 is installed adjacent to the radiation detection unit 130 , and is installed in front of the radiation detection unit to perform a function as a detector collimator for selectively transmitting X-rays and neutron rays.

The shielding unit 150 is installed in front of the radiation detection unit 110 along the path of the X-rays and neutron rays, and can selectively transmit X-rays and neutron rays.

A plurality of shielding units 150 may be installed along a path of radiation generated by the radiation generating unit 110 .

In addition, the shielding unit 150 of the present invention may be installed between the radiation generating unit 110 and the object 10 to be inspected by adjusting the direction, width, and angle of the radiation formed by the radiation generating unit 110 . It serves to guide toward the object 10 .

In this case, a slit is formed in the shielding part 150 so that radiation having a predetermined shape and width can be irradiated to the test object 10 . At this time, since the slit size affects the length of the radiographic image during one-time imaging, it is determined in consideration of the relationship with the frequency of generation or acquisition of radiation determined by the trigger signal system 115 to be described later. will be able

The controller (not shown) may transmit a synchronization signal to the radiation generator 110 and the radiation detector 130 , respectively, so that the radiation generator 110 and the radiation detector 130 can be synchronized with each other. The controller (not shown) may derive radiation image information transmitted through the object 10 by transmitting the radiation through the object 10 after controlling the time interval between generation of the neutron beam and the x-ray.

For example, when X-rays are irradiated from the radiation generator 110 , the controller (not shown) outputs a synchronization signal for detecting radiation corresponding to the X-rays and transmits them to the X-ray detector 132 . will do The x-ray detector 132 transmits the X-ray scintillation generated by the X-ray scintillators 132b' and 132b'' to the photodetector 132c, and through the signal detected from the photodetector 132c, the inspection table It will be possible to implement an image containing information about the shape of the upper body.

In addition, when the neutron beam is irradiated from the radiation generator 110 , the controller (not shown) outputs a synchronization signal corresponding to the neutron beam and transmits it to the neutron beam detector 131 .

In the neutron beam detection unit 131, the neutron beam scintillation generated from the neutron beam scintillators 131b' and 131b'' is detected by the photodetector 131c to realize an image containing material information.

At this time, X-rays and neutron rays are generated and irradiated alternately with a time difference in the radiation generating unit 110, and the radiation detecting unit 130 receives a synchronization signal from a control unit (not shown), and X-rays or neutron rays are detected. By synchronizing the timing with the irradiation timing of X-rays or neutron beams of the radiation generator 110, the X-ray detection signal and the neutron beam detection signal can be distinguished.

At this time, the incident signal of each of the X-rays and the neutron beam and the detection signal of each of the X-rays and the neutron beam may be arranged in a one-to-one correspondence in synchronization with each other, and the X-ray image sensor module 132a and the neutron beam image sensor module 131a ) is a compound configuration in the radiation gun detection unit 130, so that simultaneous detection of X-rays and neutron rays is possible, so it is possible to implement an image containing material information while maintaining the existing resolution while limiting the interference between x-rays and neutron rays. there will be

Since the detection of X-rays and neutron rays that have passed through the object 10 may be implemented in a complex manner by one radiation detection unit 130 , it will be possible to reduce the size and weight of the security screening apparatus 100 .

An imaging system (not shown) serves to generate an image based on a result detected by the radiation detector 130 . An imaging system (not shown) is configured to serve to generate image information about the object 10 based on X-rays transmitted through the object 10 .

The imaging system (not shown) serves to generate image information on the object 10 by using radiation information detected after the radiation generated by the radiation generator 110 passes through the object 10 , respectively. will do

That is, as shown in FIG. 2 , neutrons, which are high-energy radiation generated by the radiation generator 110 and X-rays having relatively low energy, are respectively irradiated to the object 10 and then the radiation detector 130 . ), it will be possible to obtain final image information about the object 10 .

3 is a conceptual diagram illustrating a state of the radiation generating unit 110 .

The radiation generator 110 may selectively generate at least one of several types of radiation having different energies.

The radiation generator 110 accelerates the electron beam E generated from the electron gun 112 by the electron accelerator 113 , and then collides the accelerated electron beam E with the target device 120 to obtain radiation.

The radiation generator 110 is connected to the electron gun 112 for generating the electron beam E, the electron gun 112, and an electron accelerator 113 and an electron accelerator formed to accelerate the electron beam E generated from the electron gun 112 It may be configured to include a target device 120 that is connected to 113 and is formed to generate radiation by being irradiated with an electron beam E accelerated by the electron accelerator 113 .

After the electron beam E generated from the electron gun 112 is accelerated by the electron accelerator 112 , the accelerated electron beam E collides with the target device 120 to obtain desired radiation.

In order to generate radiation through the radiation generator 110 , one electron gun 112 , one electron accelerator 113 , and a target device 120 are required for each type of radiation. However, according to the present invention, a desired type of radiation can be generated at a desired speed through the radiation generating target 122 installed in the target device 120 , so a plurality of devices for generating various types of radiation are unnecessary and installed. It is possible to reduce the space and cost, and it is possible to obtain the effect of reducing the hassle of individually operating the necessary equipment.

The electron gun 112 has an electrode, and when a current is applied to the electrode, an 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 bundler cavity and an acceleration cavity provided in the electron accelerator 113 .

The radiation generator 110 may alternately generate X-rays and neutron beams with a time difference through the target device 120 . For example, by controlling the target device 120, X-rays and neutron beams may be configured to be generated alternately according to a set time.

Since the radiation generating unit 110 according to the present invention does not require separate devices for each type of radiation in order to generate various types of radiation, a plurality of devices for generating various types of radiation are unnecessary, thereby reducing the installation space and cost. The cost can be reduced, and the hassle of individually operating the necessary equipment can be solved.

In addition, the accelerated electron beam E, by the magnetic field by the electromagnet 117 installed on one side of the acceleration cavity, its movement path may be changed, and as a result, the electron beam toward the neutron target or the x-ray target It will be possible to guide the movement of (E).

The radiation generating unit 110, the electron gun 112, the electron accelerator 113 and the target device 120 so that the position of the target of the target device 120 can be changed in accordance with the electron beam generation speed of the electron gun 112. It may be configured to further include a trigger signal system 115 configured to synchronize with each other.

The trigger signal system 115 serves to synchronize the electron gun 112 and the target device 120 of the radiation generator 110 with each other. The trigger signal system 115 transmits a synchronization signal toward the electron gun 112 and the target device 120 to generate a desired type of radiation at a desired repetition rate.

For example, the trigger signal system 115 may transmit a synchronization signal to the electron gun 112 to control the irradiation rate and repetition rate of the electron beam E, and by transmitting the synchronization signal to the target device 120 , the electron gun When the electron beam E generated at 112 collides with the radiation generating target 122 , it will be possible to determine the type of radiation and its repetition rate. For example, when a total of three targets are installed in the radiation generating target, the rotation speed of the radiation generating target is increased by the trigger signal system 115 while the electron beam generation repetition rate is set to 300 Hz by the trigger signal system 115 . Similar to the electron beam E generation repetition rate, when synchronized to 300 Hz, it will be possible to generate different types of radiation once per 100 Hz.

In the case of the present invention, the radiation generating target 122 included in the target device 120 is synchronized with the trigger signal system 115, and may be configured to obtain a desired type of radiation even at a high speed of about 600 rpm or more, The generator 110 may selectively generate desired X-rays, neutron rays, gamma rays, and electron beams by using the target device 120 .

FIG. 4 is a perspective view showing the state of the target device 120 , and FIG. 5 is a side cross-sectional view of the target device 120 .

The target device 120 is included in the radiation generator 110 and is configured to generate various types of radiation. The target device 120 may generate radiation by accelerating the electron beam E generated from the electron gun 112 (refer to FIG. 3 ) by the electron accelerator 113 and colliding with the accelerated electron beam E.

The target device 120 may include a housing 121a , a cover plate 121b , a radiation generating target 122 , and a driving unit 126 forming an exterior.

The housing 121a has a cylindrical shape, and a space in which a vacuum chamber is formed may be formed therein. The housing 121a may be made of a metal material, for example, may be made of a material such as stainless steel.

A vacuum state may be formed inside the housing 121a, and the electron beam E accelerated through the electron accelerator 113 may be incident through the outer front portion of the housing 121a.

A cover plate 121b may be installed inside the housing 121a. The cover plate 121b may be fixedly installed inside the housing 121a.

The electron beam E incident from the housing 121a may collide with the radiation generating target 122 configured to rotate relative to the cover plate 121b inside the housing 121a to form radiation. In this case, a radiation irradiation hole 124 serving as a passage through which the radiation generated from the radiation generating target 122 moves may be formed at one side of the cover plate 121b.

A recessed surface 121a may be formed on the front surface of the cover plate 121b to be recessed to have a predetermined depth. The irradiation hole 124 may be formed on one side of the recess surface 121a.

As shown in FIG. 4 , a vacuum feed through 127 installed to surround the rotating shaft 125 is installed between the cover plate 121b and the bevel gear 126c, and a vacuum state is formed therein. The housing 121a and the driving unit 126 formed in a non-vacuum state are connected.

In addition, as shown in FIG. 5 , the radiation irradiation hole 124 may be formed at a position overlapping with the electron beam input hole 121c ′ formed in the inner case 121c , and formed from the radiation generating target 122 . Allow the radiation to pass through. The inner case 121c is installed inside the housing 121a.

The electron beam irradiation hole 121a''' may be formed on one side of the housing 121a to overlap the radiation irradiation hole 124 and the electron beam input hole 121c'.

The driving unit 126 forms a driving force for forming the movement of the radiation generating target 122 located inside the housing 121a, and includes a rotating shaft 125 installed to pass through the cover plate 121b, and the rotating shaft. A motor 126a for rotating 125 may be included.

The driving unit 126 serves to provide a driving force to the rotation shaft 125 so that the position and rotation angle of the radiation generating target 122 are changed. The driving unit 126 includes a bevel gear 126c having a motor 126a connected to one end and a rotating shaft 125 connected to the other end to transmit the rotational force formed from the motor 126a to the rotating shaft 125 . can do.

A connection joint 126b may be installed between the motor 126a and the bevel gear 126c.

The bevel gear 126c serves to transmit kinetic force between different axes, and the bevel gear 126c receives the rotational force formed by the motor 126a from the direction intersecting the direction in which the rotating shaft 125 extends. , serves to transmit a rotational force to the rotating shaft 125 . As shown in FIG. 4 , the bevel gear 126c may be connected to the motor 126a through one shaft and to be connected to the rotation shaft 125 through the other shaft.

The rotation shaft 125 is formed to extend in one direction, and may be installed to pass through the center of the cover plate 121b and the radiation generating target 122 . The rotation shaft 125 may be installed to pass through a rotation shaft penetration portion (not shown) formed to protrude from the center of the cover plate 121b toward the radiation generating target 122 . In addition, the radiation generating target 122 may be fixedly installed on one side of the rotation shaft. A rotation shaft support portion 122a is formed in the center of the radiation generating target 122 to support the outer circumferential surface of the rotation shaft 125 , so that it can be rotated in one direction together with the rotation shaft 125 when the rotation shaft 125 rotates.

The motor 126a transmits a rotational force through a motor shaft and may be an AC servomotor. In the case of the present invention, the rotational force generated by the motor 126a may be transmitted to the radiation generating target 122 through the rotation shaft 125, and the motor 126a drives the radiation generating target 122 at a high speed of about 6000 rpm or more. Since it has to be rotated, the specifications can be determined taking this into account.

The motor 126a is installed in a direction intersecting the direction in which the rotation shaft 125 extends, and the motor 126a is preferably positioned to be spaced apart from the irradiation hole 124 from each other. At this time, the motor 126a may be preferably installed so as not to overlap with the radiation passing through the radiation hole 124 . This is because, when the radiation generated while the electron beam E collides with the radiation generating target travels toward the motor 126a, the performance of the motor 126a is deteriorated.

The radiation generating target 122 is installed inside the housing 121a, and serves to generate radiation by colliding with the electron beam E, and is connected to the rotation shaft 125 and rotated while the electron beam E is irradiated. It will be possible to generate radiation with different energies depending on the target.

The radiation generating target 122 is coupled to the rotation shaft 125 to rotate in one direction, and serves to generate radiation having different energies from the incident electron beam E.

The radiation generating target 122 may be positioned to be spaced apart from each other by a predetermined distance from the front portion of the cover plate 121b.

The radiation generating target 122 may be configured such that a plurality of different targets 123 are installed on a plate formed in the shape of a triangular boomerang.

In this case, the installation position of each target 123 and which characteristic material to configure each target 123 may vary depending on the user's design.

In the present specification, the radiation generating target 122 having a total of three targets 123a, 123b, and 123c has been described as an example, but this is only one example, and the shape of the plate, the number of targets, and installation of the target according to the user's demand It would also be possible to change the position.

The radiation generating target 122 includes a rotation shaft support part 122a configured to support the rotation shaft 125, and a plurality of rotation shaft support parts 122a along the outside of the periphery of the rotation shaft support part 122a and at a predetermined angle and distance. It may be configured to include a target 123 of dogs. The radiation generating target 122 may be rotated together with the rotation shaft 125 with respect to the rotation shaft support part 122a.

The radiation generating target 122 may be configured such that, on a plate partitioned into a plurality of regions, at least one target 123 for generating different types of radiation is disposed in each region of the plate. In this case, each target 123 may be formed at an eccentric position from the rotation shaft support 122a.

The radiation generating target 122 may rotate at a preset rotation speed together with the rotation shaft 125, and emits radiation of different energies by each target 123 superimposed on the traveling path of the electron beam E. be able to generate

Each target 123 installed in the radiation generating target 122, collides with the electron beam E to generate radiation having different energies, the first target 123a, the second target 123b, and the third target (123c). The first to third targets 123a , 123b , and 123c may be made of different materials.

For example, the first target 123a may be a target for generating X-rays, the second target 123b may be configured as a target for generating neutrons, and the third target 123c may be a first target 123a and It could be made as a target for generating X-rays with different energies.

At this time, if any one target is not made of a specific material, since the electron beam E passes without colliding, it will be possible to configure any one target having an empty interior as a target for generating the electron beam E.

As such, the first target 123a may be configured to collide with the electron beam E to generate X-rays, and the second target 123b may be configured to collide with the electron beam E to generate neutron beams. In addition, the third target 123c may be configured to collide with the electron beam E to generate X-rays having another energy, and through each of these targets 123, X with a predetermined time difference alternately with each other - It will be able to form wires and neutron beams.

The radiation generating target 122 may rotate in a clockwise direction at a preset rotation speed together with the rotation shaft 150 , and each target installed on the radiation generating target 122 rotates with the radiation formed on the cover plate 121b. The irradiation hole 124 and the electron beam E may be positioned to overlap each other along the irradiation direction. In this case, radiation by collision with the electron beam E may be generated through any one target positioned to overlap the irradiation hole 124 .

Synchronization with the rotation speed and rotation direction of the radiation generating target 122 and the electron beam E may be achieved by the trigger signal system 115 .

In addition, a sensor unit 126d may be installed on one side of the bevel gear 126c. The sensor unit may transmit the signal to the trigger signal system 115 after detecting the position of each target 123 . The trigger signal system 115 generates the desired radiation at a desired repetition rate according to the value set by the user in consideration of the rotation speed of the motor 171, the incident speed of the electron beam E by the electron accelerator 113, and the position of each target. You can control it to create.

For example, when the first target 123a formed on the radiation generating target 122 is rotated clockwise and positioned to overlap the radiation irradiation hole 124, the housing passes through the electron gun 112 and the electron accelerator 113. The electron beam E incident into the interior of the 121a may collide with the first target 123a, and X-rays may be generated by the first target 123a, and the generated X-rays are radiation. It may be supplied to a device connected to the irradiation hole 124 . Likewise, it may be possible to generate neutrons from the second target 123b.

6 : is a figure which shows the mode of the shielding part 150. As shown in FIG.

The shielding unit 150 may be installed along a path of X-rays and the neutron beam, and serves to limit the occurrence of interference between the X-rays and the neutron beam. The shielding unit 150 is installed along the path of the X-rays and the neutron beams passing through the object 10, and serves to limit the interference between the X-rays and the neutron beams.

The shielding part 150 includes a body 151 for forming an external appearance, a leg 151a for supporting the bottom surface at the lower end of the body 151, shielding bodies 152b and 153b for shielding radiation, and a shielding body ( 152b and 153b may include shielding body support members 152a and 153a for supporting them by being inserted therein. The shields 152b and 153b serve to shield x-rays and neutron rays.

The shielding part 150 may include X-ray shielding parts 152a and 152b and neutron ray shielding parts 153a and 153b. The X-ray shielding parts 152a and 152b and the neutron ray shielding parts 153a and 153b may be stacked vertically. For example, the X-ray shields 152a and 152b may be disposed on the neutron ray shields 153a and 153b.

However, in these X-ray shielding units 152a and 152b, the arrangement structure of the neutron beam shielding units 153a and 153b is only an example, and the vertical arrangement of the neutron beam detection unit 131 and the X-ray detection unit 132 is provided. It may be decided by considering the structure.

The X-ray shielding parts 152a and 152b and the neutron ray shielding parts 153a and 153b may be positioned in a state in which the load is supported by the support member 154 positioned on the body 151 .

At this time, the shielding body 152b of the X-ray shielding parts 152a and 152b may be made of lead or iron, and the shielding body 153b of the neutron ray shielding parts 153a and 153b is made of a plastic material such as polyethylene, Pe or It may consist of Cd. This is because the propagation of X-rays can be blocked by lead or iron, and the propagation of neutron rays can be blocked by the plastic material, Pe or Cd.

In addition, the shield support members 152a and 153a may include an X-ray shield support member 152a and a neutron beam shield support member 153a. The X-ray shielding body support member 152a and the neutron ray shielding body support member 153a serve to support each of the shielding bodies 152b and 153b.

The shielding unit 150 is installed in front of the radiation detection unit 110 along the path of the X-rays and neutron rays, and can selectively transmit X-rays and neutron rays.

A plurality of shielding units 150 may be installed along a path of radiation generated by the radiation generating unit 110 .

In addition, the shielding unit 150 may be installed between the radiation generating unit 110 and the inspection object 10 , and adjusting the movement direction, width, and propagation angle of the radiation formed by the radiation generating unit 110 to the inspection object. It serves as a guide towards (10).

A slit is formed in the shielding part 150 , so that radiation having a predetermined shape and width can be irradiated to the object 10 . At this time, since the slit size affects the length of the radiographic image during one-time imaging, it is determined in consideration of the relationship with the frequency of generation or acquisition of radiation determined by the trigger signal system 115 to be described later. will be able

When the shielding unit 150 is installed in front of the radiation detection unit 130 , it is installed adjacent to the front of the neutron beam detection unit 131 to absorb X-rays X-ray shielding units 152a and 152b and X - Installed to be spaced apart from the ray shielding parts (152a, 152b) by a certain distance, located adjacent to the front of the x-ray detector 132, and configured to shield the neutron beams (153a, 153b) can be Accordingly, it will be possible to limit the occurrence of interference between the x-rays detected by the neutron beam detector 131 or the neutron beams detected through the x-ray detector 132 .

On the other hand, when the shielding unit 150 is installed between the radiation generating unit 110 and the object 10, the X-ray shielding unit 152a including the X-ray shielding body 152b along the radiation path. 152b) and the neutron ray shielding parts 153a and 153b including the neutron ray shielding body 153b are installed, respectively, so that it will be possible to selectively shield X-rays and neutron rays.

Specifically, when X-rays are generated, the position of the shielding body 152b of the X-ray shielding units 152a and 152b can be adjusted to shield X-rays, and when neutron beams are generated, neutron beam shielding The position of the shielding body 153b of the parts 153a and 153b may be adjustable to shield the neutron beam.

For example, each of the shields 152b and 153b of the X-ray shielding units 152a and 152b and the neutron ray shielding units 153a and 153b may be moved in the vertical direction, and each of the shields 152b and 153b may rise to raise the radiation. By positioning the shields 152b and 153b on the travel path, it will be possible to shield the radiation. Specifically, the shielding body of the X-ray shielding unit 152a, 152b rises to shield the X-ray, and when a neutron beam is generated, the shielding body of the neutron beam shielding body 153b rises to shield the neutron beam. .

When the shields 152b and 153b descend, shielding of radiation may not be achieved.

7 is a conceptual view of the security screening apparatus 100 viewed from above, and FIGS. 8 (a) and (b) are enlarged views of the radiation detection unit 130, respectively, the neutron beam detection unit 131 and the x-ray The state of the detection unit 132 is shown.

The security screening apparatus 100 may include a radiation generating unit 110 , a radiation detecting unit 130 , and a shielding unit 150 , and the radiation detecting unit 130 is a radiation generating unit based on the object 10 to be inspected. It may be disposed on the opposite side of 110 .

The radiation detector 130 may be configured to include a radiation detector body 130a and radiation image sensor modules 131a and 132a.

The radiation detection unit body 130a may be formed in the form of a rectangular column extending in a vertical direction, and the radiation detection unit body 131 may be irradiated with radiation toward the front with respect to the radiation direction.

The radiation image sensor modules 131a and 132a may include an x-ray detection module 132a for detecting x-rays and a neutron beam detection module 131a for detecting neutron beams. The x-ray detection module 132a and the neutron beam detection module 131a for detecting neutron beams may be disposed vertically.

The x-ray detection module 132a and the neutron beam detection module 131a for detecting neutron beams may have a structure in which a plurality of small-part detection modules are arranged side by side in the radiation detection unit body 130a, respectively. .

In this case, each of the radiation image sensor modules 131a and 132a may be formed in a shape bent to have a predetermined curvature toward the front surface in order to prevent distortion when the radiation is detected.

The x-ray detection module 132a may be configured to include X-ray scintillators 132b' and 132b'' and a photodetector 132c. In addition, the neutron beam detection module 131a may be configured to include neutron beam scintillators 131b' and 131b'' and a photodetector 131c.

The X-ray scintillators 132b' and 132b'' interact with X-rays to emit scintillation by X-rays, and absorb energy from the incident X-rays to become an excited electronic state and then to a ground state. As it returns to , 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 X-ray photodetector 132c is equipped with X-ray scintillators 132b' and 132b'' on both sides of the substrate through a semiconductor process, and detects the scintillation generated from the X-ray scintillator 132b', 132b''. It absorbs and converts light energy into electrical energy to generate an electric current. Through this current, the X-ray photodetector 132c transmits through the object 10 and can detect radiation containing material and image information, respectively.

In addition, the neutron beam scintillator (131b', 131b'') is made to interact with the neutron beam to emit a flash by the neutron beam. The neutron beam scintillators 131b' and 131b'' absorb energy from the incident neutron beam, enter an excited state, and then return to the ground state to emit electromagnetic waves having a wavelength corresponding to the energy difference between the excited state and the ground state. to generate light.

The neutron beam photodetector 131c is equipped with neutron beam scintillators 131b', 131b'' on both sides of the substrate through a semiconductor process, and absorbs the flash generated from the neutron beam scintillator 131b', 131b'', It converts light energy into electrical energy to generate an electric current. Through this current, the neutron beam photodetector 131c can pass through the object 10 and detect radiation containing material and image information, respectively.

9 is a view showing the state of the security search apparatus 100 according to another embodiment of the present invention.

The security search apparatus 100 may include a radiation generator 110 , a radiation detector 130 , an object transfer unit 140 , a shield 150 , a controller (not shown), and an imaging system (not shown). and may further include gamma-ray detectors 160a and 160b.

The security screening apparatus 100 according to the present embodiment includes the radiation generating unit 110, the radiation detection unit 130, the inspection object transfer unit 140, and the shielding unit ( 150), the control unit (not shown), and the image system (not shown) overlap, and thus descriptions thereof will be omitted in the overlapping range.

In the security search apparatus 100 according to the present embodiment, it is possible to analyze and detect the location of a dangerous object by using the neutron radiation analysis method through the gamma-ray detection units 160a and 160b.

For example, when neutrons generated by the radiation generator 110 are irradiated to the object 10, gamma rays (γ) are emitted from the object 10. By analyzing using the neutron radiation analysis method, it is possible to analyze the location of dangerous substances such as explosives, narcotics, and nuclear material terrorist radiation included in the test object 10 .

Neutron Activation Analysis (NAA) refers to irradiating generated neutrons to an analysis sample, changing the sample to a radioactive isotope and measuring the emitted gamma rays to quantitatively determine the amount of a specific element included in the analysis sample. how to investigate. The neutron radiation analysis method enables non-destructive analysis by analyzing the density or dose of gamma rays emitted after neutrons are irradiated to the sample.

The gamma ray detectors 160a and 160b can quantitatively analyze the gamma ray energy spectrum by using gamma ray spectroscopy to analyze gamma rays generated from neutrons incident on the object, and have a high energy level, so By measuring the photon energy of strong gamma rays, it is possible to generate spectral lines by gamma rays.

When the spectrum line by gamma ray secured by the gamma ray detectors 160a and 160b is analyzed, the test object 10 is compared with existing data on dangerous substances such as explosives, narcotics, nuclear material, and terrorist radiation, and then through matching information. It becomes possible to accurately analyze what substances are contained in

Gamma ray spectroscopy is an example of neutron radiation analysis method, which is applied to sodium iodide (NaI) scintillation counter and germanium measuring instrument. This makes it possible to non-destructively analyze several elements simultaneously for various types of samples.

The gamma-ray detectors 160a and 160b can be configured by using a high-resolution room temperature semiconductor detector capable of 3D position sensing and Compton imaging, and through this, a gamma-ray detector that very precisely analyzes the spectrum of gamma rays generated through neutron radiation analysis. it is possible In addition, since it is possible to track the location of dangerous substances such as nuclear material and terrorist radiation in cargo that are difficult to detect, it becomes possible to track dangerous substances that cannot be searched by existing systems in airports and ports.

In addition, when at least two gamma-ray detectors 160a and 160b are installed in the security search apparatus 100, coordinates on the X, Y, and Z axes of the dangerous object included in the object 10 are determined by triangulation. Since it is possible to accurately detect it, it has the feature that it is possible to derive the location of the dangerous object.

Also, as shown in FIG. 9 , a plurality of gamma-ray detectors 160a and 160b may be provided, and it may be possible to be disposed on both sides along a radiation path.

The neutron beam, which is radiation having high energy generated by the radiation generator 110 , and X-ray having relatively low energy are respectively irradiated to the object 10 , and then obtained through the radiation detection unit 130 to obtain the object 10 . ), it is possible to obtain image information about At this time, gamma rays generated while the neutron beam collides with the object 10 are analyzed by the gamma-ray detectors 160a and 160b to secure the location information of the object 10 .

The radiation generator 110 and the radiation detector 130 may be controlled by a controller (not shown).

The controller (not shown) may transmit a synchronization signal to the radiation generator 110 and the radiation detector 130 , respectively, so that the radiation generator 110 and the radiation detector 130 can be synchronized with each other. The controller (not shown) may derive radiation image information transmitted through the object 10 by transmitting the radiation through the object 10 after controlling the time interval between generation of the neutron beam and the x-ray.

For example, when X-rays are irradiated from the radiation generator 110 , the controller (not shown) outputs a synchronization signal for detecting radiation corresponding to the X-rays and transmits them to the X-ray detector 132 . will do The x-ray detector 132 transmits the X-ray scintillation generated by the X-ray scintillators 132b' and 132b'' to the photodetector 132c, and through the signal detected from the photodetector 132c, the inspection table It will be possible to implement an image containing information about the shape of the upper body.

In addition, when the neutron beam is irradiated from the radiation generator 110 , the controller (not shown) outputs a synchronization signal corresponding to the neutron beam and transmits it to the neutron beam detector 131 .

In the neutron beam detection unit 131, the neutron beam scintillation generated from the neutron beam scintillators 131b' and 131b'' is detected by the photodetector 131c to realize an image containing material information.

At this time, X-rays and neutron rays are generated and irradiated alternately with a time difference in the radiation generating unit 110, and the radiation detecting unit 130 receives a synchronization signal from a control unit (not shown), and X-rays or neutron rays are detected. By synchronizing the timing with the irradiation timing of X-rays or neutron beams of the radiation generator 110, the X-ray detection signal and the neutron beam detection signal can be distinguished.

At this time, the incident signal of each of the X-rays and the neutron beam and the detection signal of each of the X-rays and the neutron beam may be arranged in a one-to-one correspondence in synchronization with each other, and the X-ray image sensor module 132a and the neutron beam image sensor module 131a ) is a compound configuration in the radiation gun detection unit 130, so that simultaneous detection of X-rays and neutron rays is possible, so it is possible to implement an image containing material information while maintaining the existing resolution while limiting the interference between x-rays and neutron rays. there will be

Accordingly, according to the present invention, since the detection of X-rays and neutron rays that have passed through the object 10 can be implemented in a complex manner by one radiation detection unit 130 , it is possible to reduce the size and weight of the security screening device 100 . will be.

The control unit (not shown) receives the gamma ray (γ) emitted from the test object 10 by using the gamma ray detection units 160a and 160b and receives the gamma ray energy spectrum line, and then stores explosives, narcotics, and dangerous substances such as nuclear material terrorism radiation. After comparing with the existing gamma-ray energy spectrum line data for , it will be possible to analyze the material included in the test object 10 by deriving matching information.

In addition, the control unit (not shown) includes at least two gamma-ray detectors 160a and 160b, and thereby analyzes gamma rays input to each of the gamma-ray detectors 160a and 160b. can be analyzed.

The controller (not shown) may secure image information of the object 10 from radiation transmitted through the object 10, and detect dangerous substances contained in the interior of the object 10 from the gamma-ray detectors 160a and 160b. Since detection and information on specific hazardous materials can be obtained, it will be possible to more easily detect hazardous materials such as explosives, narcotics, nuclear materials, and terrorist radiation.

An imaging system (not shown) serves to generate an image based on a result detected by the radiation detector 130 . An imaging system (not shown) is configured to serve to generate image information about the object 10 based on X-rays transmitted through the object 10 .

The imaging system (not shown) is configured to obtain image information about the object 10 by using radiation information detected after the radiation generated by the radiation generator 110 has passed through the object 10, respectively. do.

That is, the security search apparatus 100 according to the present invention can analyze and detect the location of a dangerous object by using the neutron radiation analysis method through the gamma-ray detection unit 150 .

When the neutron generated by the radiation generator 110 is irradiated to the object 10, gamma rays (γ) are emitted from the object 10. By using and analyzing, it is possible to analyze the location of dangerous substances such as explosives, narcotics, nuclear materials, and terrorist radiation included in the test object 10 .

That is, neutrons, which are high-energy radiation generated by the radiation generator 110 and X-rays having relatively low energy, are respectively irradiated to the object 10 and then obtained through the radiation detection unit 130 to the object to be examined. It becomes possible to acquire image information about (10). In addition, gamma rays generated when neutrons collide with the object 10 are analyzed by the gamma-ray detector 150 to secure position information of the object 10 .

10 is a diagram illustrating a state of a security search apparatus according to another embodiment of the present invention.

The security screening apparatus 100 includes a radiation generating unit 110 , a radiation detecting unit 130 , an object transfer unit 140 , a shielding unit 150 , a control unit (not shown), an imaging system (not shown), and a gamma ray detection unit ( 160a, 160b) may be included.

The security screening apparatus 100 according to the present embodiment includes the radiation generating unit 110, the radiation detection unit 130, the inspection object transfer unit 140, and the shielding unit ( 150), the controller (not shown), the imaging system (not shown), and the gamma-ray detectors 160a and 160b have the same configuration, and thus descriptions thereof will be omitted in the overlapping range.

The security search apparatus 100 may further include a sub-shielding unit 170 disposed adjacent to the radiation generating unit 110 .

The sub-shielding unit 170 is disposed adjacent to the radiation generating unit 110 to selectively transmit X-rays and neutron rays. The sub-shielding unit 170 may refer to the collimator described above.

The sub-shielding unit 170 may include an X-ray sub-shielding unit 172 configured to absorb X-rays, and a neutron beam sub-shielding unit 173 configured to shield neutron beams.

In this case, the X-ray sub-shielding unit 172 and the neutron beam sub-shielding unit 173 may be disposed vertically. As the vertical height of the sub-shielding unit 170 can be adjusted, it is also possible to fundamentally block X-rays or neutrons generated from the radiation generating unit 120 .

The sub-shielding unit 170 may be installed in front of the radiation generating unit 110 , and an X-ray shielding unit 172 configured to absorb X-rays and a neutron beam shielding unit 173 configured to shield neutron beams. can be composed of

The sub-shielding unit 170 controls the propagation angle of the x-rays and the neutron beams generated by the radiation generator 110, thereby limiting the occurrence of interference between the x-rays and the neutron beams passing through the object to be examined. .

For example, the sub-shielding unit 170 is installed between the radiation generating unit 110 and the object 10 to be examined, the X-ray sub-shielding unit 172 and the neutron beam sub constituting the sub-shielding unit 170 . By the shielding portion 173, it becomes possible to selectively shield X-rays and neutron rays.

In addition, as shown in FIG. 10 , in the security screening apparatus 100 according to the present embodiment, the shielding unit 150 and the radiation detection unit 130 are integrally formed, thereby reducing the installation space of the security screening apparatus 100 . will be.

In addition, the radiation detection unit 130 and the shielding unit 150 may be moved in the forward and backward directions along the path of the X-rays and the neutron beams by the transport system 180 . This is to more accurately detect the radiation that has passed through the object 10 by adjusting the distance between the radiation source generator 110 and the radiation detector 130 . For example, in order to more accurately detect the transmitted neutrons after transmitting the neutrons generated by the radiation source generating unit 110 toward the object 10, the transfer system 180 shields the radiation detection unit 130 and the The unit 150 may be moved toward the radiation generating unit 110 .

11 is a conceptual diagram schematically illustrating a process of obtaining final information of an object to be inspected according to an operation of a security search device.

The radiation generating unit 110 may form x-rays having low energy and neutron beams having high energy to have pulsed signals, respectively, and after alternatingly generating radiation having low energy and radiation having high energy with each other , it will be possible to irradiate it toward the test object 10 . Here, radiation having a low energy may mean X-rays, and radiation having a high energy may mean a neutron beam.

Since X-rays and neutron rays generated from the radiation generator 110 may be transmitted through the object 10 , it may be configured to acquire information about the object 10 .

The radiation detection unit 130 serves to detect X-rays and neutron beams that have passed through the object 10, respectively. The radiation detector 130 serves to detect each radiation after the X-rays and neutron beams generated from the radiation generator 110 are transmitted through the object 10, respectively. The radiation detector 130 may include a neutron beam detector 131 and an X-ray detector 132 .

When the X-rays and neutron rays generated by the radiation generator 110 are transmitted through the object 10, respectively, the radiation detector 130 does not interfere with each other, and image information and neutrons by X-rays It will be possible to acquire image information by line.

Since X-rays mainly react with electrons in the material, the attenuation coefficient may be determined by the atomic number of the material. Since neutron beams mainly react with hydrogen in the material, the attenuation coefficient may be determined according to the distribution of hydrogen. With such complex radiation, it is possible to obtain an image capable of discriminating about 20 or more substances after obtaining a material discrimination coefficient (R-value) through image information on the object to be examined.

In this case, the imaging system (not shown) may receive the result detected by the radiation detector 130 from the controller (not shown) to generate an image of the object 10 . An imaging system (not shown) may generate an image of the object 10 based on X-rays and neutron beams that have passed through the object 10 .

In addition, the gamma-ray detection units 160a and 160b are installed adjacent to the object transfer unit 140 , and can detect gamma rays generated from the object 10 , and through the control unit 160 , the information is analyzed by the examination table. Whether the upper body 10 contains dangerous substances, if there are dangerous substances, it will be possible to analyze exactly where the location is.

In addition, through the control unit (not shown), the image information of the object 10 secured from the radiation detection unit 130 and the material and location information of the object 10 secured through the gamma ray detection units 160a and 160b are obtained. By combining, it will be possible to detect dangerous substances and secure final information about dangerous substances.

The security search apparatus 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 embodiment so that various modifications can be made.

10: test object 100: security search device
110: radiation generating unit 112: electron gun
113: electronic accelerator 115: trigger signal system
120: target device 121a: housing
121b: cover plate 122: radiation generating target
123: target 125: axis of rotation
126: driving unit 130: radiation detection unit
131: neutron beam detection unit 132: x-ray detection unit
140: object transfer unit 150: shielding unit
160: gamma ray detection unit

Claims (19)

a radiation generator for generating X-rays and neutron rays, respectively, and irradiating them toward the object;
an examination object transfer unit for changing the position of the examination object;
a shielding unit installed along a path of the X-rays and the neutron rays and selectively transmitting the X-rays and the neutron rays to limit interference between the X-rays and the neutron rays; and
and a radiation detection unit located on the opposite side of the radiation generating unit with the examination object interposed therebetween, and configured to respectively detect X-rays and neutron rays that pass through the examination object, respectively,
The radiation detection unit,
an X-ray detector configured to obtain image information on a shape of the object from the X-rays passing through the object; and
and a neutron beam detection unit disposed adjacent to the X-ray detection unit and configured to acquire image information regarding material information of the inspection object from the neutron beam that has passed through the inspection object,
The X-ray detection unit and the neutron beam detection unit are spaced apart from each other, and are disposed in a direction that intersects with each other in correspondence to the path of the X-ray and the neutron beam passing through the inspection object,
The X-rays and the neutron beams are generated from the radiation generator alternately with a preset time difference and are irradiated toward the object to be inspected,
The radiation generating unit,
an electron gun for generating 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 device connected to the electron accelerator and formed to generate radiation by receiving an electron beam accelerated by the electron accelerator,
The target device is
a housing having an open end and a vacuum chamber formed therein;
an inner case having a cylindrical shape protruding toward the vacuum chamber, installed inside the housing, and having an electron beam input hole formed in a front portion so that the electron beam is incident toward the housing;
a cover plate fixedly installed on the housing to cover the opened end of the housing;
a driving unit having a rotating shaft installed to pass through the cover plate and the inner case, and a motor for rotating the rotating shaft; and
and a radiation generating target coupled to the rotation shaft and configured to rotate in one direction, and forming radiation having different energies as the incident electron beam passes. delete According to claim 1,
The security screening device, characterized in that the x-ray detection unit and the neutron beam detection unit is formed integrally. delete According to claim 1,
The shield is
an X-ray shielding unit installed adjacent to the front of the neutron beam detection unit to absorb X-rays; and
and a neutron ray shielding unit disposed in the vertical direction with the X-ray shielding unit and positioned adjacent to the front of the X-ray detecting unit to shield the neutron beam. According to claim 1,
The security screening device further comprising a sub-shielding unit disposed adjacent to the radiation generating unit to selectively transmit the X-rays and the neutron rays. 7. The method of claim 6,
The sub-shielding unit includes an X-ray sub-shielding unit configured to absorb X-rays, and a neutron beam sub-shielding unit configured to shield neutron rays,
The X-ray sub-shielding unit and the neutron beam sub-shielding unit security screening device, characterized in that arranged vertically. According to claim 1,
The security screening device, characterized in that the shield and the radiation detection unit is formed integrally. 9. The method of claim 8,
Security screening device, characterized in that it further comprises a transport system for allowing the radiation detection unit and the shielding unit to move back and forth along the path of the X-ray and the neutron beam. 6. The method of claim 5,
The shielding body of the X-ray shielding unit may be made of any one of lead and iron,
The shielding body of the neutron ray shielding unit is a security screening device, characterized in that made of any one of PE and Cd. According to claim 1,
A control unit for transmitting a synchronization signal to the radiation generating unit and the radiation detecting unit, respectively, so that the radiation generating unit and the radiation detecting unit are synchronized with each other,
The control unit, Security screening device, characterized in that for transmitting a signal for distinguishing the time at which the x-rays arriving at the X-ray detector and the neutron beams reaching the neutron beam detector are detected. According to claim 1,
and a gamma-ray detection unit installed adjacent to the examination object and configured to detect a gamma-ray signal generated from the examination object. 13. The method of claim 12,
and the gamma-ray detector measures gamma rays generated from neutrons colliding with the object and analyzes the gamma rays to derive the location of the object. 13. The method of claim 12,
The gamma ray detection unit generates a gamma ray spectrum from the gamma ray signal to analyze the material of the test object. According to claim 1,
and an imaging system for acquiring image information about the object by using the radiation information detected from the X-rays and the neutron beams that have passed through the object. delete delete According to claim 1,
The radiation generating target is
a rotation shaft support configured to support the rotation shaft; and
Security screening device comprising a plurality of targets installed to be spaced apart from the rotation shaft support portion by a predetermined distance along the outer circumference of the rotation shaft support portion. 19. The method of claim 18,
In the radiation generating target, at least one target for generating different types of radiation is disposed on a plate partitioned into a plurality of regions for each region of the plate,
The driving unit is connected to the radiation-generating target through the rotation shaft and rotates the radiation-generating target while determining the target to which the electron beam is irradiated.

Images