CN106841248B - Safety inspection system for vehicles or containers - Google Patents
Safety inspection system for vehicles or containers Download PDFInfo
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- CN106841248B CN106841248B CN201710223020.9A CN201710223020A CN106841248B CN 106841248 B CN106841248 B CN 106841248B CN 201710223020 A CN201710223020 A CN 201710223020A CN 106841248 B CN106841248 B CN 106841248B
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- 238000007689 inspection Methods 0.000 title claims abstract description 63
- 230000005855 radiation Effects 0.000 claims abstract description 52
- 238000003384 imaging method Methods 0.000 claims abstract description 38
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 2
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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Abstract
The application provides a safety inspection system for a vehicle or a container, comprising: the portal frame, a first X-ray generator and a second X-ray generator which are arranged on the portal frame and are used for generating and emitting a first X-ray and a second X-ray, and a first array detector and a second array detector which are respectively arranged opposite to the first X-ray generator and the second X-ray generator and are used for receiving the first X-ray and the second X-ray which pass through the detected vehicle or the container and correspondingly generate first scanning data and second scanning data of the detected vehicle or the container, wherein the radiation energy of the second X-ray is higher than that of the first X-ray; and the imaging and control device is used for controlling the working states of the X-ray generator and the array detector, and synthesizing the first scanning data and the second scanning data into a first scanning image and a second scanning image respectively to obtain a target scanning image of the detected vehicle or container. According to the technical scheme, the performance of equipment can be improved, and the whole scanning image of the vehicle or the container can be clearly and accurately displayed.
Description
Technical Field
The present application relates to the field of radiation scanning inspection, and in particular to a security inspection system for vehicles or containers.
Background
At present, for the existing safety inspection system of a vehicle or a container, the safety inspection system can emit X-ray with higher radiation energy to carry out radiation scanning imaging, and has the advantages of strong penetrating capability, being capable of penetrating thicker parts of the vehicle or the container and carrying out clear image display on the thicker parts, such as loading heavy goods and engine and storage battery parts of the vehicle, but for thinner parts of the vehicle or the container, obvious defects exist on the displayed image level and the clear degree, such as empty containers and vehicle cabins; in the existing safety inspection system of another vehicle or container, the system can emit X-ray with lower radiation energy to carry out radiation scanning imaging, and has relatively weak penetrating capability, so that the thicker part of the vehicle or container cannot be penetrated for clear image display, but the thinner part of the vehicle or container has stronger image gradation and definition.
Therefore, how to make the same security inspection system in the controllable cost range can not only perform clear radiation scanning imaging on thicker parts of vehicles or containers, but also well display the image level and clear details of the vehicles or containers, and becomes a technical problem to be solved.
Disclosure of Invention
Based on the problems, the application provides a new technical scheme, which can improve the radiation scanning imaging inspection performance of a safety inspection system of a vehicle or a container, and clearly and accurately display the whole scanning image of the vehicle or the container.
In view of this, the present application provides a security inspection system for a vehicle or container, comprising: a portal frame; a first X-ray generator and a first array detector, the first X-ray generator being disposed on the gantry for generating and emitting a first X-ray, and the first array detector being disposed opposite the first X-ray generator for receiving the first X-ray passing through a vehicle or container under inspection and generating first scan data of the vehicle or container under inspection; a second X-ray generator and a second array detector, the second X-ray generator being disposed on the gantry for generating and emitting a second X-ray when the first X-ray generator generates and emits the first X-ray, wherein the second X-ray has a higher radiant energy than the first X-ray, and the second array detector being disposed opposite the second X-ray generator for receiving the second X-ray passing through the vehicle under inspection and generating second scan data of the vehicle under inspection or container; and the imaging and control device is used for controlling the working states of the first X-ray generator, the second X-ray generator, the first array detector and the second array detector, and synthesizing the first scanning data and the second scanning data after converting the first scanning data and the second scanning data into a first scanning image and a second scanning image respectively so as to obtain a target scanning image of the detected vehicle or container.
In the technical scheme, two sets of oppositely arranged X-ray generators and array detectors are arranged in a safety inspection system of a vehicle or a container, X-rays with different radiation energies are respectively emitted to carry out radiation scanning imaging on the same inspected vehicle or container, the radiation energy of a specific second X-ray is higher than that of a first X-ray, therefore, the first scanning image acquired through the combination of the first X-ray generator and the first array detector can well show contrast and details among different parts of the inspected vehicle or the container, the second scanning image acquired through the combination of the second X-ray generator and the second array detector can carry out clear radiation scanning imaging on thicker parts of the vehicle or the container, and further, the target scanning image of the inspected vehicle or the container obtained through effectively fusing the first scanning image and the second scanning image is only slightly changed on the safety inspection system of the existing vehicle or the container, so that the same safety inspection system can well show contrast and details among different parts of the inspected vehicle or the container, the second scanning image of the vehicle or the thicker parts of the container can be well imaged, the vehicle or the container can also well show clear radiation scanning image of the thicker parts of the vehicle or the container, the clear image of the vehicle or the container can be clearly imaged, and the clear image of the whole vehicle or the container can be clearly scanned or the container can be clearly imaged, and the vehicle or the container can be clearly imaged, or the image or the container can be clearly scanned, or the image or the container can be clearly.
In the above technical solution, preferably, the first X-ray generator and the second X-ray generator are arranged in parallel on the top, the side wall or the bottom of the gantry, and the first array detector and the second array detector corresponding to the first X-ray generator and the second X-ray generator respectively are arranged in parallel in a U-shape or an L-shape.
In the technical scheme, the installation forms of the two radiation sources of the safety inspection system of the vehicle or the container can be various, so that the effective radiation scanning of the inspected vehicle or the container can be realized, further, the two X-ray generators serving as the radiation sources can be arranged on the top, the side wall or the bottom of the portal frame of the safety inspection system in parallel, and when the two X-ray generators are arranged on the bottom of the portal frame, the two X-ray generators can be in a form of being directly buried underground or can be provided with a bottom beam for the portal frame at first, so that the radiation sources are arranged in the bottom beam, and the effective protection of the radiation sources is formed; and two array detectors respectively arranged opposite to the two radiation sources and used for receiving the X-ray passing through the detected vehicle or container can be arranged in a U-shaped or L-shaped mode so as to fully receive the X-ray effectively passing through the detected vehicle or container as far as possible, and ensure the accuracy and the stability of imaging.
In any of the foregoing solutions, preferably, the frequency of sampling the first scan data by the first array detector is the same as the frequency of sampling the second scan data by the second array detector.
In the technical scheme, in order to ensure that the imaging resolutions of the first scanning image and the second scanning image are consistent, the two array detectors should be ensured to sample and receive corresponding X-rays passing through a detected vehicle or container and generate corresponding scanning data with consistent frequencies, so that the two scanning images can be fused effectively.
In any of the foregoing aspects, preferably, the security inspection system for a vehicle or a container further includes: and the conveying device is used for driving the detected vehicle or container to pass through the scanning areas of the first X-ray generator and the second X-ray generator at a constant speed.
In the technical scheme, in order to complete the comprehensive inspection of the inspected vehicle or container, the relative motion required by radiation scanning imaging is formed, on one hand, the inspected vehicle or container can be conveyed through the scanning area of the first X-ray generator and the second X-ray generator by the conveying device, and further, in order to ensure the accuracy, the definition and the stability of the scanning imaging, the conveying device is required to uniformly drive the inspected vehicle or container to form the scanning area by X-ray irradiation.
In any of the foregoing aspects, preferably, the security inspection system for a vehicle or a container further includes: the portal frame self-walking device is arranged at the bottom of the portal frame and used for driving the first X-ray generator and the second X-ray generator to pass through the detected vehicle or the container at a constant speed.
In the technical scheme, in order to complete the comprehensive inspection of the inspected vehicle or container, the relative motion necessary for radiation scanning imaging is formed, on the other hand, a gantry self-walking device is also arranged for a safety inspection system of the vehicle or container, so that X-rays emitted by a first X-ray generator and a second X-ray generator respectively pass through the inspected vehicle or container by the driving of the gantry self-walking device, and further, in order to ensure the accuracy, the definition and the stability of scanning imaging, the gantry self-walking device needs to drive a radiation source at a constant speed to pass through the inspected vehicle or container.
In any of the above aspects, preferably, the imaging and control device is configured to: dividing the first scanning image and the second scanning image into a plurality of corresponding image blocks respectively; acquiring a first gray value of each pair of corresponding image blocks in the first scanning image and a second gray value of each pair of corresponding image blocks in the second scanning image; and determining a target image block adopted in the target scanning image according to the threshold range where the first gray level value and the second gray level value are respectively positioned.
In the technical scheme, in order to obtain a clear and accurate target scanning image of the whole detected vehicle or container, the first scanning image and the second scanning image can be divided into a plurality of image blocks correspondingly, for example, the first scanning image and the second scanning image are divided according to each component part of the vehicle or container, and then the image block finally adopted in the target scanning image is determined according to the analysis of the gray value of the image block of each pair of the different scanning images, namely, the image block is equivalent to the final scanning imaging result of comparing the same part of the detected vehicle or container obtained in the first scanning image and the second scanning image, so that the scanning image of the whole detected vehicle or container can be clearly and accurately displayed.
In any of the above aspects, preferably, the imaging and control device is configured to: when one of the first gray value and the second gray value is lower than a first gray threshold value and the other is higher than the first gray threshold value, placing an image block corresponding to a gray value higher than the first gray threshold value as the target image block in a corresponding position of the target scan image; when one of the first gray level value and the second gray level value is higher than a second gray level threshold value and the other is lower than the second gray level threshold value, placing an image block corresponding to a gray level value lower than the second gray level threshold value as the target image block in a corresponding position of the target scanning image, wherein the second gray level threshold value is larger than the first gray level threshold value; when the first gray level value and the second gray level value are lower than the first gray level threshold value, taking the image block with the higher gray level value as the target image block to be placed in the corresponding position of the target scanning image; when the first gray level value and the second gray level value are both higher than the first gray level threshold value and lower than the second gray level threshold value, respectively placing an image block with larger brightness in two image blocks corresponding to the two gray level values or an image block with higher information in an adjacent area of the two image blocks into a corresponding position of the target scanning image as the target image block; and when the first gray level value and the second gray level value are higher than the second gray level threshold value, taking the image block with the lower gray level value as the target image block to be placed in the corresponding position of the target scanning image.
In the technical scheme, a threshold range where the gray value of each pair of image blocks is located is defined by setting two gray thresholds, wherein a second gray threshold is larger than a first gray threshold, a higher gray threshold indicates image overexposure, and a lower gray threshold indicates image underexposure; further specifically, if the gray value of one of the two image blocks is lower than the first gray threshold value and the other is higher than the second gray threshold value and the other is lower than the first gray threshold value, the image block whose gray value is in the normal range between the first gray threshold value and the second gray threshold value is correspondingly clear and whose image resolution is high is fused as the target image block into the target scan image; if the gray values of the two image blocks are higher than the second gray threshold value or lower than the second gray threshold value, fusing the image block with relatively clear image resolution as the target image block into the target scanning image; and if the gray values of the two image blocks are in the normal range, the target image block can be selected according to the principle that the image brightness is optimal or the information degree of the adjacent areas of the image blocks is highest (for example, the standard deviation of the adjacent areas of the image blocks is larger), so that the effective fusion of the first scanning image and the second scanning image can be completed.
In any of the foregoing technical solutions, preferably, the range of radiant energy of the first X-ray is: 160KeV to 450KeV; the range of the radiation energy of the second X-ray is as follows: 1MeV to 9MeV.
In the technical scheme, in order to meet the exposure requirement of the respective radiation scanning imaging of the first X-ray generator and the second X-ray generator, the range of the radiation energy of the first X-ray emitted by the first X-ray generator and the second X-ray generator can be 160 KeV-450 KeV, and the range of the radiation energy of the second X-ray can be 1 MeV-9 MeV, preferably 320KeV and 4MeV respectively.
In any of the above embodiments, preferably, the first X-ray generator and the second X-ray generator include an X-ray machine, an electron linear accelerator, or an electron induction accelerator.
In any of the foregoing aspects, preferably, the security inspection system for a vehicle or a container further includes: a first shielding container with a collimator for accommodating the first X-ray generator; a second shielding container with a collimator for accommodating the second X-ray generator.
In the technical scheme, in order to avoid unnecessary damage caused by useless X-ray leakage emitted by the X-ray generator, a corresponding shielding container can be arranged for effective shielding, and further in order to correct the X-ray emitted by the X-ray generator, a shielding container with a collimator can be adopted, so that a slit of the collimator is aligned with a ray outlet of the shielding container, and a ray beam passing through the collimator meets the design standard, thereby ensuring the imaging quality of radiation scanning.
Additional aspects and advantages of the application will be set forth in part in the description which follows, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 shows a schematic block diagram of a security inspection system for a vehicle or container in accordance with a first embodiment of the present application;
FIG. 2 shows a schematic block diagram of a security inspection system for a vehicle or container in accordance with a second embodiment of the application;
fig. 3 shows a schematic block diagram of a security inspection system for a vehicle or container according to a third embodiment of the present application.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
Fig. 1 shows a schematic block diagram of a security inspection system 10 for a vehicle or container in accordance with a first embodiment of the present application.
As shown in fig. 1, a security inspection system 10 of a vehicle or container according to an embodiment of the present application includes: gantry 102, first X-ray generator 104, first array detector 106, second X-ray generator 108, second array detector 110, and imaging and control device 112.
Wherein the first X-ray generator 104 is disposed on the gantry 102 for generating and emitting a first X-ray, and the first array detector 106 is disposed opposite to the first X-ray generator 104 for receiving the first X-ray passing through a vehicle or container under inspection and generating first scan data of the vehicle or container under inspection; the second X-ray generator 108 is disposed on the gantry 102 for generating and emitting a second X-ray when the first X-ray generator 104 generates and emits the first X-ray, wherein the radiation energy of the second X-ray is higher than the radiation energy of the first X-ray, and the second array detector 110 is disposed opposite the second X-ray generator 108 for receiving the second X-ray passing through the vehicle under inspection and generating second scan data of the vehicle under inspection or container; the imaging and control device 112 is configured to control the working states of the first X-ray generator 104, the second X-ray generator 108, the first array detector 106 and the second array detector 110, and perform a combination process on the first scan data and the second scan data after converting them into a first scan image and a second scan image, respectively, so as to obtain a target scan image of the inspected vehicle or container.
In this embodiment, two sets of oppositely disposed X-ray generators and array detectors are disposed in the security inspection system 10 of a vehicle or container, and X-rays with different radiation energies are emitted to perform radiation scanning imaging on the same inspected vehicle or container, and the radiation energy of the specific second X-ray is higher than that of the first X-ray, so that the first scanning image obtained by the combination of the first X-ray generator 104 and the first array detector 106 can well show contrast and details between different parts of the inspected vehicle or container, while the second scanning image obtained by the combination of the second X-ray generator 108 and the second array detector 110 can perform clear radiation scanning imaging on a thicker part of the vehicle or container, and further the object scanning image of the inspected vehicle or container obtained by effectively fusing the first scanning image and the second scanning image is only a small change of the security inspection system 10 of the existing vehicle or container, so that the contrast and details between different parts of the inspected vehicle or container can be well shown in a controllable cost range, and the whole security inspection system can also well image the thicker part of the vehicle or container, the image of the vehicle or container can well show clear radiation scanning imaging, and the image of the thicker part of the vehicle or container can clearly show clear radiation scanning imaging, and the image of the vehicle or container can clearly show clear imaging.
Further, in the above embodiment, the first X-ray generator 104 and the second X-ray generator 108 are disposed in parallel on the top, the side wall or the bottom of the gantry 102, and the first array detector 106 and the second array detector 110 corresponding to the first X-ray generator 104 and the second X-ray generator 108 respectively are disposed in parallel in a U-shape or an L-shape.
In this embodiment, the two radiation sources of the safety inspection system 10 of the vehicle or container may be variously mounted so that effective radiation scanning of the inspected vehicle or container may be achieved, further, two X-ray generators as the radiation sources may be disposed in parallel at the top, side or bottom of the gantry 102 of the safety inspection system 10, and when disposed at the bottom of the gantry 102, may be in a form buried directly in the ground or a bottom beam may be first disposed for the gantry 102 to place the radiation sources in the bottom beam so as to form effective protection of the radiation sources; and two array detectors respectively arranged opposite to the two radiation sources and used for receiving the X-ray passing through the detected vehicle or container can be arranged in a U-shaped or L-shaped mode so as to fully receive the X-ray effectively passing through the detected vehicle or container as far as possible, and ensure the accuracy and the stability of imaging.
Further, in any of the above embodiments, the first array detector 106 samples the second array detector 110 at the same frequency as the first scan data.
In this embodiment, to ensure that the imaging resolution of the first and second scanned images are consistent, it is ensured that the two array detectors sample the frequencies at which they receive corresponding X-rays passing through the inspected vehicle or container and generate corresponding scanned data, thereby ensuring that the two scanned images can be effectively fused.
Further, in any of the above embodiments, in order to complete a full inspection of a vehicle or container under inspection, the relative movement necessary to form a radiation scanning image may be achieved by the following two specific embodiments.
Embodiment one: as shown in fig. 2, the vehicle or container security inspection system 10 further includes: and a conveying device 114, configured to drive the inspected vehicle or container to pass through the scanning areas of the first X-ray generator 104 and the second X-ray generator 108 at a uniform speed.
In this embodiment, the vehicle or container to be inspected can be transported by the transporting device 114 through the scanning area of the first X-ray generator 104 and the second X-ray generator 108, and further, in order to ensure the accuracy, the definition and the stability of the scanning imaging, the transporting device 114 needs to uniformly drive the vehicle or container to be inspected to form the scanning area through the X-ray irradiation.
Specifically, in one aspect, the conveying device 114 may sequentially include a first pallet, a power roller, a non-driving roller, and a second pallet, and the inspected vehicle or container sequentially passes through the first pallet, the power roller, the non-driving roller, and the second pallet by being driven by the power roller, and further, the array detector may be disposed under the non-driving roller; alternatively, the conveyor 114 may include a first powertrain unit and a second powertrain unit that are driven by separate chain conveyors and have the same conveying direction, such that the inspected vehicle or container travels from the inlet end to the outlet end of the security inspection system 10.
Embodiment two: as shown in fig. 3, the vehicle or container security inspection system 10 further includes: a gantry self-walking device 114' is mounted at the bottom of the gantry 102 for driving the first X-ray generator 104 and the second X-ray generator 108 through the inspected vehicle or container at a constant speed.
In this embodiment, the self-walking device 114' of the gantry may be installed for the safety inspection system 10 of the vehicle or the container, so that the X-rays emitted by the first X-ray generator 104 and the second X-ray generator 108 respectively pass through the inspected vehicle or the container by driving the self-walking device 114' of the gantry, and further, in order to ensure the accuracy, the definition and the stability of scanning and imaging, the self-walking device 114' of the gantry needs to uniformly drive the radiation source to pass through the inspected vehicle or the container.
Specifically, the self-walking of the security inspection system 10 may be achieved by installing a mounting frame capable of rotating in a horizontal direction with respect to the vertical beam at the bottom of the vertical beam of the gantry 102, and further installing wheels capable of rotating around the axis of the mounting frame and rotating in a horizontal direction with respect to the vertical beam with respect to the mounting frame.
Further, in any of the above embodiments, the imaging and control device 112 is configured to: dividing the first scanning image and the second scanning image into a plurality of corresponding image blocks respectively; acquiring a first gray value of each pair of corresponding image blocks in the first scanning image and a second gray value of each pair of corresponding image blocks in the second scanning image; and determining a target image block adopted in the target scanning image according to the threshold range where the first gray level value and the second gray level value are respectively positioned.
In this embodiment, in order to obtain a clear and accurate target scan image of the whole vehicle or container to be inspected, the first scan image and the second scan image may be divided into a plurality of image blocks, for example, according to respective components of the vehicle or container, and then the image block finally adopted in the target scan image is determined according to the analysis of the gray values of the image blocks of each pair of the different scan images, that is, the image block is equivalent to comparing the first scan image and the second scan image to obtain the same part of the vehicle or container to be inspected, which is clear as the final scan imaging result thereof, so as to clearly and accurately display the scan image of the whole vehicle or container.
Further, in any of the above embodiments, the imaging and control device 112 is configured to: when one of the first gray value and the second gray value is lower than a first gray threshold value and the other is higher than the first gray threshold value, placing an image block corresponding to a gray value higher than the first gray threshold value as the target image block in a corresponding position of the target scan image; when one of the first gray level value and the second gray level value is higher than a second gray level threshold value and the other is lower than the second gray level threshold value, placing an image block corresponding to a gray level value lower than the second gray level threshold value as the target image block in a corresponding position of the target scanning image, wherein the second gray level threshold value is larger than the first gray level threshold value; when the first gray level value and the second gray level value are lower than the first gray level threshold value, taking the image block with the higher gray level value as the target image block to be placed in the corresponding position of the target scanning image; when the first gray level value and the second gray level value are both higher than the first gray level threshold value and lower than the second gray level threshold value, respectively placing an image block with larger brightness in two image blocks corresponding to the two gray level values or an image block with higher information in an adjacent area of the two image blocks into a corresponding position of the target scanning image as the target image block; and when the first gray level value and the second gray level value are higher than the second gray level threshold value, taking the image block with the lower gray level value as the target image block to be placed in the corresponding position of the target scanning image.
In this embodiment, the threshold range in which the gray values of each pair of image blocks are located is defined by setting two gray thresholds, wherein a second gray threshold is greater than the first gray threshold, a higher gray threshold indicates image overexposure and a lower gray threshold indicates image underexposure; further specifically, if the gray value of one of the two image blocks is lower than the first gray threshold value and the other is higher than the second gray threshold value and the other is lower than the first gray threshold value, the image block whose gray value is in the normal range between the first gray threshold value and the second gray threshold value is correspondingly clear and whose image resolution is high is fused as the target image block into the target scan image; if the gray values of the two image blocks are higher than the second gray threshold value or lower than the second gray threshold value, fusing the image block with relatively clear image resolution as the target image block into the target scanning image; and if the gray values of the two image blocks are in the normal range, the target image block can be selected according to the principle that the image brightness is optimal or the information degree of the adjacent areas of the image blocks is highest (for example, the standard deviation of the adjacent areas of the image blocks is larger), so that the effective fusion of the first scanning image and the second scanning image can be completed.
In the above embodiment, the first gray threshold may be 5% of the entire dynamic range of the gray value, and the second gray threshold may be 95% of the entire dynamic range of the gray value, for example, when the entire dynamic range of the gray value is 0 to 255 for 256 levels, the 5% of the entire dynamic range is 256×5% (i.e., the first gray threshold), and the 95% of the entire dynamic range is 256×95% (i.e., the second gray threshold).
Further, in any of the foregoing embodiments, the range of radiant energy of the first X-ray is: 160KeV to 450KeV; the range of the radiation energy of the second X-ray is as follows: 1MeV to 9MeV.
In this embodiment, in order to meet the exposure requirements of the respective radiation scanning imaging of the first X-ray generator 104 and the second X-ray generator 108, the radiation energy of the first X-ray emitted by the first X-ray generator and the radiation energy of the second X-ray generator may have a range of 160KeV to 450KeV, and the radiation energy of the second X-ray may have a range of 1MeV to 9MeV, preferably 320KeV and 4MeV, respectively.
Further, in any of the above embodiments, the first X-ray generator 104 and the second X-ray generator 108 comprise an X-ray machine, an electron linear accelerator, or an electron induction accelerator.
Further, in any of the above embodiments, as shown in fig. 2 and 3, the safety inspection system 10 of a vehicle or a container further includes: a first shielded container 116 with a collimator and a second shielded container 118 with a collimator.
Wherein the first shielded container 116 with collimator is configured to house the first X-ray generator 104; the second shielded container 118 with collimator is used to house the second X-ray generator 108.
In this embodiment, in order to avoid unnecessary damage caused by unnecessary X-ray leakage from the X-ray generator, a corresponding shielding container may be provided for effective shielding, and further in order to correct the X-ray from the X-ray generator, a shielding container with a collimator may be used, so that a slit of the collimator is aligned with a ray outlet of the shielding container, so that a ray bundle passing through the collimator meets design criteria, thereby ensuring imaging quality of radiation scanning.
The technical scheme of the application is explained in detail by combining the drawings, and by the technical scheme of the application, the radiation scanning imaging inspection performance of the safety inspection system of the vehicle or the container can be improved, and the whole scanning image of the vehicle or the container can be clearly and accurately displayed.
In the description of the present application, it should be understood that the terms "top," "bottom," "upper," "lower," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "connected," "mounted," "secured," "disposed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified and limited otherwise; the description of the terms "one embodiment," "some embodiments," "particular embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A security inspection system for a vehicle or container, comprising:
a portal frame;
a first X-ray generator and a first array detector, the first X-ray generator being disposed on the gantry for generating and emitting a first X-ray, and the first array detector being disposed opposite the first X-ray generator for receiving the first X-ray passing through a vehicle or container under inspection and generating first scan data of the vehicle or container under inspection;
a second X-ray generator and a second array detector, the second X-ray generator being disposed on the gantry for generating and emitting a second X-ray when the first X-ray generator generates and emits the first X-ray, wherein the second X-ray has a higher radiant energy than the first X-ray, and the second array detector being disposed opposite the second X-ray generator for receiving the second X-ray passing through the vehicle under inspection and generating second scan data of the vehicle under inspection or container;
the imaging and control device is used for controlling the working states of the first X-ray generator, the second X-ray generator, the first array detector and the second array detector, and synthesizing the first scanning data and the second scanning data after converting the first scanning data and the second scanning data into a first scanning image and a second scanning image respectively so as to obtain a target scanning image of the detected vehicle or container;
the imaging and control device is configured to:
dividing the first scanning image and the second scanning image into a plurality of corresponding image blocks respectively;
acquiring a first gray value of each pair of corresponding image blocks in the first scanning image and a second gray value of each pair of corresponding image blocks in the second scanning image;
determining a target image block adopted in the target scanning image according to the threshold range in which the first gray level value and the second gray level value are respectively positioned;
when one of the first gray value and the second gray value is lower than a first gray threshold value and the other is higher than the first gray threshold value, placing an image block corresponding to a gray value higher than the first gray threshold value as the target image block in a corresponding position of the target scan image;
when one of the first gray level value and the second gray level value is higher than a second gray level threshold value and the other is lower than the second gray level threshold value, placing an image block corresponding to a gray level value lower than the second gray level threshold value as the target image block in a corresponding position of the target scanning image, wherein the second gray level threshold value is larger than the first gray level threshold value;
when the first gray level value and the second gray level value are lower than the first gray level threshold value, taking the image block with the higher gray level value as the target image block to be placed in the corresponding position of the target scanning image;
when the first gray level value and the second gray level value are both higher than the first gray level threshold value and lower than the second gray level threshold value, respectively placing an image block with larger brightness in two image blocks corresponding to the two gray level values or an image block with higher information in an adjacent area of the two image blocks into a corresponding position of the target scanning image as the target image block;
and when the first gray level value and the second gray level value are higher than the second gray level threshold value, taking the image block with the lower gray level value as the target image block to be placed in the corresponding position of the target scanning image.
2. A vehicle or container security inspection system in accordance with claim 1 wherein,
the first X-ray generator and the second X-ray generator are arranged at the top, the side wall or the bottom of the portal frame in parallel, and the first array detector and the second array detector which correspond to the first X-ray generator and the second X-ray generator respectively are arranged in parallel in a U shape or an L shape.
3. A vehicle or container security inspection system in accordance with claim 2 wherein,
the first array detector samples the same frequency at which the first scan data is generated as the second array detector samples the second scan data.
4. A vehicle or container security inspection system in accordance with claim 3, further comprising:
and the conveying device is used for driving the detected vehicle or container to pass through the scanning areas of the first X-ray generator and the second X-ray generator at a constant speed.
5. A vehicle or container security inspection system in accordance with claim 3, further comprising:
the portal frame self-walking device is arranged at the bottom of the portal frame and used for driving the first X-ray generator and the second X-ray generator to pass through the detected vehicle or the container at a constant speed.
6. A safety inspection system for vehicles or containers according to any one of claims 1 to 5, characterized in that,
the range of the radiation energy of the first X-ray is as follows: 160KeV to 450KeV;
the range of the radiation energy of the second X-ray is as follows: 1MeV to 9MeV.
7. A vehicle or container security inspection system according to any of claims 1 to 5 wherein the first and second X-ray generators comprise X-ray machines, electronic linear accelerators or electronic induction accelerators.
8. The vehicle or container security inspection system of claim 7, further comprising:
a first shielding container with a collimator for accommodating the first X-ray generator;
a second shielding container with a collimator for accommodating the second X-ray generator.
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| CN108614302B (en) * | 2018-07-11 | 2024-07-05 | 同方威视技术股份有限公司 | Radiation inspection system |
| CN108846388A (en) * | 2018-07-13 | 2018-11-20 | 青岛永悦光迅技术有限责任公司 | A kind of container intelligence examination sterilizing equipment decontaminating apparatus |
| CN109085189A (en) * | 2018-11-01 | 2018-12-25 | 同方威视技术股份有限公司 | Vehicle inspection system |
| CN109738936B (en) * | 2019-02-11 | 2024-04-05 | 北京华力兴科技发展有限责任公司 | Substance detection method, device and system |
| CN110244371A (en) * | 2019-07-10 | 2019-09-17 | 北京华力兴科技发展有限责任公司 | Vehicle inspection imaging device and vehicle inspection component |
| CN113835130A (en) * | 2020-06-23 | 2021-12-24 | 同方威视技术股份有限公司 | Automatic walking type inspection device and automatic vehicle separation method |
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