Security inspection equipment, security inspection system and security inspection method

Abstract

The present disclosure provides a security inspection device and a security inspection method, including: a bracket defining an inspection channel extending in a first direction; a first X-ray accelerator disposed at a position offset from the center line of the inspection channel at the top of the bracket, configured to radiate first X-rays downward toward the inspection channel for inspecting an item to be inspected passing through the inspection channel; a second X-ray accelerator configured to radiate second X-rays toward the inspection channel in a third direction for inspecting the item to be inspected passing through the inspection channel; and a detector device including: a plurality of detector modules disposed on the bracket at positions facing the first X-ray accelerator and the second X-ray accelerator, for receiving at least a part of the first X-rays and / or the second X-rays to form a transmission image of the item to be inspected; wherein the first X-rays, the second X-rays and the detector modules in the detector device are configured to be located in the same plane. A security inspection method applied to the security inspection device is also provided.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the technical field of security inspection, and in particular, to a security inspection device, a security inspection system, and a security inspection method. Background Art

[0002] Currently, the demand for security inspection of large items is increasing. For example, in working scenarios such as customs, it is necessary to scan large-volume items to be inspected such as containers and / or vehicles.

[0003] Currently, the security inspection device for the above items to be inspected at least includes two brackets, which are adjacent to each other at the upstream and downstream positions in the moving direction of the item to be inspected. Moreover, two sets of scanning devices (such as an X-ray accelerator and a corresponding detector module) need to be respectively arranged on the two brackets to scan the item to be inspected from at least two angles.

[0004] Since the above security inspection device includes two brackets, a relatively large space needs to be occupied (or reserved). In addition, since each bracket needs to install a corresponding X-ray accelerator and detector module, the number of required detector modules is also large. Further, due to the large number of detector modules, the response signals collected by the detector modules and the control of the security inspection device are relatively complex. Summary of the Invention

[0005] In view of the existing technical problems, the present invention provides a security inspection device, a security inspection system, and a security inspection method to at least partially solve the above technical problems.

[0006] One aspect of the present disclosure provides a security inspection device, including: a bracket defining an inspection channel extending along a first direction; a first X-ray accelerator disposed at a position offset from the center line of the inspection channel at the top of the bracket, configured to radiate a first X-ray downward toward the inspection channel for inspecting an item to be inspected passing through the inspection channel; a second X-ray accelerator configured to radiate a second X-ray toward the inspection channel for inspecting an item to be inspected passing through the inspection channel; and a detector device including: a plurality of detector modules disposed on the bracket at positions facing the first X-ray accelerator and the second X-ray accelerator, for receiving at least a part of the first X-ray and / or the second X-ray to form a transmission image of the item to be inspected; wherein, the central planes formed by the first X-ray, the second X-ray, and the plurality of detector modules are configured to be in the same plane.

[0007] According to an embodiment of the present disclosure, the detector device further includes a signal acquisition module, which is electrically connected to the first X-ray accelerator, the second X-ray accelerator, and the plurality of detector modules, and is configured to mark the signals received by the detector modules and generated by the first X-ray and the second X-ray.

[0008] According to an embodiment of the present disclosure, the plurality of detector modules are arranged in a tiled manner to form rows, columns, or an array; wherein, the tiling is characterized in that the receiving ends of each detector module in each row, column, or array are located in the same plane.

[0009] According to an embodiment of the present disclosure, a part of the detector modules are respectively configured as a side array and a bottom array; wherein, the side array is arranged on the inner side surface of the bracket, the bottom array is arranged on the inner bottom surface of the bracket, and the ray divergence angle of the first X-ray covers the side array and the bottom array.

[0010] According to an embodiment of the present disclosure, another part of the detector modules are configured as a top array; wherein, the top array is arranged on the inner top surface of the bracket, and the ray divergence angle of the second X-ray covers the side array and the top array.

[0011] According to an embodiment of the present disclosure, the ray divergence angle of the second X-ray also covers a part of the bottom array.

[0012] The present disclosure also provides a security inspection method, including: the first X-ray accelerator and the second X-ray accelerator sequentially and intermittently radiate the first X-ray and the second X-ray to the inspection channel; and the detector modules collect the first X-ray and the second X-ray and respectively generate data packets.

[0013] According to an embodiment of the present disclosure, the detector modules collect the first X-ray and the second X-ray and respectively generate data packets, including: the first X-ray accelerator and the second X-ray accelerator output a synchronization pulse signal and / or an image marking signal to the detector modules while radiating the first X-ray and the second X-ray to the inspection channel; the detector modules enable the collection of the first X-ray and the second X-ray according to the synchronization pulse signal, and mark the collected data packets as a first data packet and a second data packet according to the image marking signal.

[0014] According to an embodiment of the present disclosure, the security inspection method further includes: performing sub-image stitching on the data in each data packet according to the first data packet and the second data packet, and respectively generating a first transmission image and a second transmission image.

[0015] The present disclosure also provides a security inspection system for detecting a moving vehicle, which is characterized by including: a security inspection device; and a speed detection device configured to be able to detect the speed of the vehicle, including: a first detection device disposed upstream of the security inspection device; and a second detection device disposed upstream of the security inspection device and spaced apart from the first detection device; wherein the first detection device and the second detection device are configured to obtain the vehicle profile and detect the vehicle compartment when the vehicle passes through the second detection device, leave the second detection device, measure the speed of the vehicle by dividing the distance between the second detection device and the first detection device by the time interval for the vehicle to pass through the first detection device and the second detection device, obtain the size of the cab using the measured vehicle speed, thereby determine the position of the cab of the moving vehicle in the inspection channel, and further determine the beam emission times of the first X-ray accelerator and the second X-ray accelerator of the security inspection device, so that the first X-ray accelerator and the second X-ray accelerator emit beams respectively after the cab passes through the security inspection device.

[0016] In a schematic embodiment of the present invention, a security inspection device is disclosed. The first X-ray accelerator, the second X-ray accelerator, and the detector device are all arranged in a bracket, with relatively high compactness, so that the space occupied by the security inspection device is small. The first X-ray accelerator is arranged at a position offset from the center line of the detection channel, so that a larger scanning area can be covered on the premise that the ray divergence angle of the first X-ray is certain, which is beneficial to reducing the height of the security inspection device. The first X-ray and the second X-ray radiated by the first X-ray accelerator and the second X-ray accelerator share a part of the detector module for reception, and the number of required detector modules is small, so that the acquisition of signals and the control of the security inspection device are relatively simple, and it is beneficial to improve the economy of the security inspection device.

[0017] In a schematic embodiment of the present invention, a security inspection method is also disclosed. The first X-ray accelerator and the second X-ray accelerator radiate X-rays at intervals in sequence, and the detector module can mark the first X-ray and the second X-ray accordingly, so that corresponding transmission images are generated by different X-rays received by the detector module.

[0018] In a schematic embodiment of the present invention, a security inspection system is also provided. A speed detection device is arranged upstream of the security inspection device, and the beam emission times of the first X-ray accelerator and the second X-ray accelerator are controlled according to the measured vehicle speed, so as to radiate X-rays after the cab of the vehicle passes through the security inspection device, thereby improving the safety of the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a security inspection device according to a schematic embodiment of the present disclosure;

[0020] Figure 2Yes Figure 1 Schematic diagram of the left - hand perspective in the illustrated exemplary embodiment;

[0021] Figure 3 Flow chart of the security inspection method according to an exemplary embodiment of the present disclosure;

[0022] Figure 4 Schematic diagram of the pulse signal of the X - ray according to an exemplary embodiment of the present disclosure, wherein 4A represents the pulse signal output by the first X - ray accelerator, 4B represents the pulse signal output by the second X - ray accelerator, and 4C represents the pulse signal collected and marked by the signal acquisition module;

[0023] Figure 5 Transmission image formed by the first X - ray according to an exemplary embodiment of the present disclosure;

[0024] Figure 6 Transmission image formed by the second X - ray according to an exemplary embodiment of the present disclosure; and

[0025] Figure 7 Schematic diagram of the security inspection system according to an exemplary embodiment of the present disclosure.

[0026] Reference numerals

[0027] 1. First X - ray accelerator;

[0028] 11. First X - ray;

[0029] 2. Second X - ray accelerator;

[0030] 21. Second X - ray;

[0031] 3. Top array;

[0032] 4. Side array;

[0033] 5. Bottom array;

[0034] 6. Bracket;

[0035] 7. Item to be inspected;

[0036] 71. Vehicle;

[0037] 8. Speed detection device;

[0038] 81. First detection device; and

[0039] 82. Second detection device. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0041] The terms used herein are merely for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising" and the like as used herein indicate the presence of the described features, steps, operations and / or components, but do not preclude the presence or addition of one or more other features, steps, operations or components.

[0042] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0043] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning commonly understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C. In the case of using expressions such as "at least one of A, B, or C, etc.", generally, it should be interpreted according to the meaning commonly understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0044] Figure 1 is a schematic diagram of a security inspection device according to an exemplary embodiment of the present disclosure; Figure 2 is Figure 1 a schematic diagram of the left-side view in the illustrated exemplary embodiment.

[0045] The present disclosure provides a security inspection device, as Figure 1 and Figure 2 shown, including: a bracket 6, a first X-ray accelerator 1, a second X-ray accelerator 2, and a detection device.

[0046] The bracket 6 defines an inspection channel extending in a first direction.

[0047] The first X-ray accelerator 1 is disposed at a position offset from the center line of the inspection channel at the top of the bracket 6 and is configured to radiate a first X-ray 11 downward toward the inspection channel for inspecting an item 7 to be inspected passing through the inspection channel.

[0048] The second X-ray accelerator 2 is configured to radiate a second X-ray 21 towards the inspection channel for an item 7 to be inspected passing through the inspection channel.

[0049] A detector device, which includes but is not limited to being disposed at a position on the support 6 facing the first X-ray accelerator 1 and the second X-ray accelerator 2, and is used to receive at least a part of the first X-ray and / or the second X-ray to form a plurality of detector modules for a transmission image of the item 7 to be inspected. Among them, the central planes formed by the first X-ray, the second X-ray, and the plurality of detector modules are configured to be in the same plane. In this way, the first X-ray accelerator 1, the second X-ray accelerator 2, and the plurality of detector modules are all disposed within the same support 6, which can at least save the space occupied by one support 6. Moreover, the first X-ray accelerator 1 is disposed at the top of the support offset from the center line of the inspection channel, and can cover a larger radiation area under the condition that the ray divergence angle of the first X-ray 11 is certain and the height of the first X-ray accelerator 1 is the same. At the same height, more detector modules can be covered. And because the first X-ray 11, the second X-ray 21, and the detector modules are configured to be in the same plane, at least a part of the detector modules can be shared. Therefore, compared with a structure that, for example, uses two sets of supports to respectively arrange the first X-ray accelerator and the corresponding detector device, and the second X-ray accelerator and the corresponding detector device, the security inspection device of the present invention can reduce the number of detector modules used to achieve the purpose of facilitating control and saving costs.

[0050] In a schematic embodiment, as Figure 1 shown, the support 6 includes but is not limited to a gantry frame. Among them, the gantry frame includes two parallel and spaced-apart side end faces and a top face disposed on the two side end faces, and the bottoms of the two side end faces are disposed on the working surface. The entrance and exit of the inspection channel are disposed facing each other between the two end faces in the first direction of the gantry frame.

[0051] Specifically, the working surface includes but is not limited to the ground. It may also include any one of a bottom plate (protruding from the ground) and a groove (recessed into the ground) disposed facing the top face.

[0052] In a schematic embodiment, the support 6 includes: two side plates disposed in parallel and spaced apart on the working surface, a top plate disposed between the upper parts of the two side plates, and a groove formed between the lower parts of the two side plates. Among them, the area enclosed by the top plate, the groove, and the two side plates defines the inspection channel, the inspection channel extends in the horizontal direction (i.e., the first direction), the inspection channel includes an entrance for the item 7 to enter the inspection channel and an exit for the item 7 to leave the inspection channel, and the entrance and the exit are disposed opposite to each other.

[0053] In a schematic embodiment, the distance by which the first X-ray accelerator 1 is offset from the center line of the inspection channel includes, but is not limited to, 1500 to 4000 millimeters.

[0054] Specifically, the distance by which the first X-ray accelerator 1 is offset from the center line of the inspection channel is 3105 millimeters. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0055] For example, the distance by which the first X-ray accelerator 1 is offset from the center line of the inspection channel is 3600, 2600 millimeters, 2100 millimeters, 1600 millimeters, and other distances within the above range.

[0056] Conversely, in another schematic embodiment, the distance by which the first X-ray accelerator 1 is offset from the center line of the inspection channel can be greater than 4000 millimeters or less than 1500 millimeters.

[0057] In a schematic embodiment, the first X-ray accelerator 1 radiates the first X-ray into the bracket 6 at an angle inclined to the vertical direction. Here, being inclined to the vertical direction means that the midline of the fan-shaped surface formed by the first X-ray is not perpendicular to the working surface (such as the ground).

[0058] In a schematic embodiment, as Figure 2 shown, the central plane formed by the detector module is characterized in that the center lines of the receiving ends of each detector module in the array formed by the detector modules along rows and columns are located in the same plane, so that the first X-ray 11 and the second X-ray 21 can be received by the detector module.

[0059] In a schematic embodiment, the first X-ray accelerator 1 and / or the second X-ray accelerator 2 is / are arranged on the bracket 6.

[0060] Specifically, the first X-ray accelerator 1 is arranged on the top plate.

[0061] Furthermore, the second X-ray accelerator 2 is arranged on one side plate. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0062] For example, on the premise of ensuring that the first X-ray 11 and the second X-ray 21 radiate towards the detector module, the first X-ray accelerator 1 and / or the second X-ray accelerator 2 can also be arranged inside and / or outside the bracket 6.

[0063] In a schematic embodiment, the first X-ray 11 and the second X-ray 21 radiated from the ray source form a fan-shaped surface. The ray divergence angle of the X-ray formed by the fan-shaped surface is preferably such that the X-ray can cover a suitable detector module.

[0064] Specifically, the fan-shaped regions formed by the first X-ray 11 and the second X-ray 21 partially overlap.

[0065] In a schematic embodiment, the beam divergence angle of the first X-ray 11 includes but is not limited to 60 to 80°. Taking the item to be inspected 7 as a vehicle 71 as an example, the main beam of the first X-ray 11 covers the area above the chassis of the vehicle 71 (such as the cargo), so that the X-rays above the main beam are not blocked by the chassis.

[0066] Specifically, the beam divergence angle of the first X-ray is 60°. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0067] For example, the beam divergence angle of the first X-ray is 65°, 70°, 75°, or any other angle within the above range.

[0068] In a schematic embodiment, the beam divergence angle of the second X-ray 21 includes but is not limited to 50° to 70°. In a schematic embodiment, the radiation directions of the first X-ray 11 and the second X-ray 21 are both perpendicular to the first direction defined by the inspection channel.

[0069] Specifically, the inspection channel extends in the horizontal direction, and the first X-ray and the second X-ray radiate in the vertical direction. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0070] For example, the inspection channel extends in the vertical direction, and the first X-ray and the second X-ray radiate in the horizontal direction.

[0071] For example, the detection channel is divided into a detection area and a non-detection area. When the item to be inspected 7 is detected in the detection area, the first direction should be defined by the moving direction of the item to be inspected 7 in the detection area, and the first X-ray and the second X-ray are substantially perpendicular to the first direction.

[0072] According to the embodiments of the present disclosure, the detector device further includes a signal acquisition module. The signal acquisition module is electrically connected to the first X-ray accelerator 1, the second X-ray accelerator 2, and a plurality of detector modules, and is used to mark the signals received by the detector modules generated by the first X-ray and the second X-ray.

[0073] According to the embodiments of the present disclosure, the plurality of detector modules are arranged in a flat manner to form rows, columns, or arrays; wherein, the flat arrangement means that the receiving ends of each detector module in each row, column, or array are located in the same plane. This is beneficial to the arrangement and connection of the detector modules.

[0074] In a schematic embodiment, the plurality of detectors are respectively configured to include but are not limited to three arrays. Among them, the first array, the second array, and the third array are respectively arranged on three end faces of the bracket 6. The first array is arranged on the top surface, the second array is arranged on the side surface, and the third array is arranged on the bottom surface. The first array and the third array are parallel and both perpendicular to the second array.

[0075] According to an embodiment of the present disclosure, a part of the detector modules are respectively configured as a side array 4 and a bottom array 5; wherein, the side array 4 is disposed on the inner side surface of the bracket 6, the bottom array is disposed on the inner bottom surface of the bracket 6, and the ray divergence angle of the first X-ray 11 covers the side array 4 and the bottom array 5.

[0076] In a schematic embodiment, the side array 4 includes, but is not limited to, a detector module group formed by arranging a plurality of detector modules in the vertical column direction.

[0077] In a schematic embodiment, the bottom array 5 includes, but is not limited to, a detector module group formed by arranging a plurality of detector modules in the horizontal row direction.

[0078] According to an embodiment of the present disclosure, another part of the detector modules are configured as a top array 3; wherein, the top array 3 is disposed on the inner top surface of the bracket 6, and the ray divergence angle of the second X-ray covers the side array 4 and the top array 3.

[0079] In a schematic embodiment, the top array 3 includes, but is not limited to, a detector module group formed by arranging a plurality of detector modules in the horizontal row direction.

[0080] According to an embodiment of the present disclosure, the ray divergence angle of the second X-ray also covers a part of the bottom array 5.

[0081] In a schematic embodiment, the second X-ray accelerator 2 is disposed on the side of the bracket 6 where no detector module is provided, and is located on one side of the first X-ray accelerator 1 that is deviated from the center position.

[0082] For example, when the first X-ray accelerator 1 is disposed at a position on the top of the bracket 6 to the left of the center position, the second X-ray accelerator 2 is disposed at a lower position on the left side of the bracket 6, as Figure 1 shown. For example, when the first X-ray accelerator 1 is disposed at a position on the top of the bracket 6 to the right of the center position, the second X-ray accelerator 2 is disposed at a lower position on the right side of the bracket 6.

[0083] Figure 3 is a flowchart of a security inspection method according to a schematic embodiment of the present disclosure; Figure 4 is a schematic diagram of a pulse signal of an X-ray according to a schematic embodiment of the present disclosure, wherein, 4A represents the pulse signal output by the first X-ray accelerator, 4B represents the pulse signal output by the second X-ray accelerator, and 4C represents the pulse signal collected and marked by the signal acquisition module; Figure 5 is a transmission image formed by the first X-ray according to a schematic embodiment of the present disclosure; Figure 6It is a transmission image formed by a second X-ray according to an exemplary embodiment of the present disclosure.

[0084] Another aspect of the present disclosure also provides a security inspection method, as Figures 3 to 6 shown, including: a first X-ray accelerator 1 and a second X-ray accelerator 2 sequentially and at intervals irradiate a first X-ray 11 and a second X-ray 21 into an inspection channel; and a detector module collects the first X-ray 11 and the second X-ray 21 and generates data packets respectively.

[0085] In an exemplary embodiment, the first X-ray accelerator 1 and the second X-ray accelerator 2 irradiate the first X-ray 11 (including the beam) and the second X-ray 21 (including the beam) respectively according to a predetermined frequency and time sequence interval.

[0086] According to an embodiment of the present disclosure, as Figure 4 shown, the detector module collects the first X-ray 11 and the second X-ray 21 and generates data packets respectively, including: while irradiating the first X-ray 11 and the second X-ray 21 into the inspection channel, the first X-ray accelerator 1 and the second X-ray accelerator 2 also output a synchronization pulse signal and / or an image marking signal to the detector module; the detector module enables the collection of the first X-ray 11 and the second X-ray 21 according to the synchronization pulse signal, and marks the collected data packets as a first data packet and a second data packet according to the image marking signal.

[0087] In an exemplary embodiment, the first X-ray accelerator 1 (such as 4A), the second X-ray accelerator 2 (such as 4B) and / or the synchronization pulse signal and the image marking signal output to the detector module are output to a signal acquisition module. The signal acquisition module collects a pulse signal (such as 4A) from the first X-ray accelerator 1 and a pulse signal 4B (such as 4B) from the second X-ray accelerator 2 according to the synchronization pulse signal, and marks the collected data packets with the corresponding X-ray accelerator marks to form an acquisition signal with an accelerator pulse source mark (such as 4C).

[0088] According to an embodiment of the present disclosure, as Figure 5 and Figure 6 shown, the security inspection method further includes: performing sub-image stitching on the data in each data packet according to the first data packet and the second data packet, and respectively generating a first transmission image ( Figure 5 ) and a second transmission image ( Figure 6 ).

[0089] Figure 7 It is a schematic diagram of a security inspection system according to an exemplary embodiment of the present disclosure.

[0090] Another aspect of the present disclosure also provides a security inspection system for detecting a moving vehicle 71. As Figure 7As shown in the figure, the security inspection system includes: security inspection equipment and a speed detection device 8 configured to be able to detect the speed of the vehicle 71. The speed detection device 8 includes: a first detection device 81 and a second detection device 82 arranged upstream of the security inspection equipment, with the first detection device 81 and the second detection device 82 arranged at intervals. Among them, the first detection device 81 and the second detection device 82 are configured to obtain the vehicle profile and detect the vehicle's carriage leaving the second detection device 82 when the vehicle 71 passes through the second detection device 82, measure the speed of the vehicle 71 by dividing the distance between the first detection device 81 and the second detection device 82 by the time interval during which the vehicle passes through the first detection device 81 and the second detection device 82, and use the measured speed of the vehicle 71 to obtain the size of the driver's cab, so as to determine the position of the driver's cab of the moving vehicle 71 in the inspection passage, and further determine the beam emission times of the first X-ray accelerator 1 and the second X-ray accelerator 2 of the security inspection equipment, so that the first X-ray accelerator 1 and the second X-ray accelerator 2 emit beams at intervals in sequence after the driver's cab passes through the security inspection equipment.

[0091] In a schematic embodiment, the speed detection device 8 includes a first detection device 81 and a second detection device 82. Among them, the second detection device 82 is located at the upstream position of the security inspection equipment, and is configured to obtain the vehicle profile and detect the vehicle's carriage leaving the second detection device 82 when the vehicle passes through the second detection device 82, measure the speed of the vehicle by dividing the distance between the first detection device 81 and the second detection device 82 by the time interval during which the vehicle passes through the first detection device 81 and the second detection device 82, and use the measured speed of the vehicle to obtain the size of the driver's cab, so as to determine the position of the driver's cab of the moving vehicle in the inspection passage, and further determine the beam emission times of the first X-ray accelerator and the second X-ray accelerator, so that the first X-ray accelerator and the second X-ray accelerator emit beams respectively after the driver's cab passes through them.

[0092] In this embodiment, obtaining the vehicle profile through the second detection device 82 includes detecting the vehicle's head and finding the boundary between the vehicle's driver's cab and the carriage.

[0093] Specifically, the second detection device 82 is arranged upstream (relative to the vehicle's traveling direction) of the first detection device 81, and the first detection device 81 is located at the upstream position of the first X-ray accelerator and the second X-ray accelerator, and is used to obtain the vehicle profile size when the vehicle passes through the second detection device 82, including detecting the vehicle's head, finding the boundary between the vehicle's driver's cab and the carriage, and detecting the vehicle's carriage leaving the second detection device 82, and measuring the speed of the vehicle together with the second detection device 82, that is, measuring the speed of the vehicle by dividing the distance between the first detection device 81 and the second detection device 82 by the time interval during which the vehicle passes through the first detection device 81 and the second detection device 82, so as to obtain the lengths of the driver's cab and the carriage.

[0094] Furthermore, the second detection device 82 emits light perpendicular to the inspection channel. When the vehicle reaches the second detection device 82, the light emitted by the second detection device 82 is reflected by the vehicle. When the second detection device 82 receives the light reflected by the vehicle, it can determine that the vehicle has passed. As the vehicle continues to move forward, the light curtain emitted by the first detection device 81 irradiates the moving vehicle, so that the arrival of the vehicle's front end can be detected. Then, based on the distance between the first detection device 81 and the second detection device 82, and the time interval recorded by the security inspection equipment for the front end of the vehicle to reach the second detection device 82 and the first detection device 81 successively, the speed of the vehicle can be calculated. Here, the second detection device 82 may include a light sensor. When the vehicle passes through the second detection device 82, the light sensor detects the arrival of the vehicle. The second detection device 82 does not necessarily have a speed measurement function, and does not even have to scan in a direction perpendicular to the inspection channel to form a light curtain. It only emits a beam of light across the inspection channel. When the front end of the vehicle is irradiated by the beam of the second detection device 82, the second detection device 82 can determine the arrival of the front end. Alternatively, a detector can be set on the opposite side of the inspection channel to detect the beam, and when the vehicle blocks the beam, it can be determined that the vehicle has arrived. In this embodiment, the second detection device 82 and the first detection device 81 jointly complete the speed measurement of the vehicle.

[0095] Furthermore, based on the distance from the second detection device 82 to the bracket, after calculating the speed of the vehicle and determining the time when the front end reaches the second detection device 82, the position of the vehicle can be judged by timing: after a predetermined time T1 after the front end of the vehicle passes through the second detection device 82, the vehicle cab leaves the first X-ray accelerator and the second X-ray accelerator (bracket 6), and at this time, the first X-ray accelerator and the second X-ray accelerator are allowed to emit beams at intervals in turn.

[0096] Those skilled in the art can understand that the features described in various embodiments and / or claims of this method can be combined or combined in a variety of ways, even if such combinations or combinations are not explicitly described in this method. In particular, without departing from the spirit and teachings of this method, the features described in various embodiments and / or claims of this method can be combined and combined in a variety of ways. All such combinations and / or combinations fall within the scope of this method.

[0097] The embodiments of the present disclosure have been described above. However, these embodiments are only for illustrative purposes and not for limiting the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and all such substitutions and modifications should fall within the scope of the present disclosure.

Claims

1. A security inspection device, characterized in that, Comprising: A bracket (6) defining an inspection channel extending in a first direction; A first X-ray accelerator (1) disposed at a position offset from the center line of the inspection channel at the top of the bracket (6), configured to radiate a first X-ray downward toward the inspection channel for inspecting an item to be inspected (7) passing through the inspection channel; A second X-ray accelerator (2) configured to radiate a second X-ray toward the inspection channel for inspecting an item to be inspected (7) passing through the inspection channel; And A detector device, comprising: A plurality of detector modules disposed on the bracket (6) at positions facing the first X-ray accelerator (1) and the second X-ray accelerator (2), for receiving at least a part of the first X-ray and / or the second X-ray to form a transmission image of the item to be inspected (7); Wherein, the central planes formed by the first X-ray (11), the second X-ray (21) and the plurality of detector modules are configured to be in the same plane; A signal acquisition module electrically connected to the first X-ray accelerator (1), the second X-ray accelerator (2) and the plurality of detector modules; The detector module is further configured to enable the acquisition of the first X-ray (11) and the second X-ray (21) according to the synchronization pulse signals output by the first X-ray accelerator (1) and the second X-ray accelerator (2), the signal acquisition module is used to mark the signals received by the detector module generated by the first X-ray (11) and the second X-ray (21), and the detector module further marks the acquired data packets as a first data packet and a second data packet according to the image marking signals output by the first X-ray accelerator (1) and the second X-ray accelerator (2); A part of the detector modules are respectively configured as a side array (4) and a bottom array (5), wherein, the side array (4) is disposed on the inner side surface of the bracket (6), the bottom array (5) is disposed on the inner bottom surface of the bracket (6), and the ray divergence angle of the first X-ray (11) covers the side array (4) and the bottom array (5); Another part of the detector modules are configured as a top array (3), wherein, the top array (3) is disposed on the inner top surface of the bracket (6), and the ray divergence angle of the second X-ray covers the side array (4) and the top array (3); The ray divergence angle of the second X-ray (21) also covers a part of the bottom array (5).

2. The security inspection device according to claim 1, characterized in that, The plurality of detector modules are arranged in a flat manner to form rows, columns or arrays; Wherein, the flat arrangement means that the receiving ends of each detector module in each row, column or array are located in the same plane.

3. A security inspection method, applied to the security inspection device as described in claim 1 or 2, characterized in that, Comprising: The first X-ray accelerator (1) and the second X-ray accelerator (2) sequentially and intermittently radiate the first X-ray (11) and the second X-ray (21) toward the inspection channel; and Enabling the detector module to acquire the first X-ray (11) and the second X-ray (21) and generate data packets respectively.

4. The security inspection method according to claim 3, characterized in that, The detector module collects the first X-ray (11) and the second X-ray (21) and generates data packets respectively, including: While radiating the first X-ray (11) and the second X-ray (21) to the inspection channel, the first X-ray accelerator (1) and the second X-ray accelerator (2) also output a synchronization pulse signal and an image marking signal to the detector module; The detector module enables the collection of the first X-ray (11) and the second X-ray (21) according to the synchronization pulse signal, and marks the collected data packets as a first data packet and a second data packet according to the image marking signal.

5. The security inspection method according to claim 4, wherein The security inspection method further includes: Performing sub-image stitching on the data in each data packet according to the first data packet and the second data packet to generate a first transmission image and a second transmission image respectively.

6. An X-ray security inspection system is applied to detect a moving vehicle, characterized in that, Including: The security inspection device according to claim 1 or 2; And A speed detection device (8), configured to be able to detect the speed of the vehicle (71), including: A first detection device (81), arranged upstream of the security inspection device; and A second detection device (82); arranged upstream of the security inspection device and spaced from the first detection device (81); Wherein, the first detection device (81) and the second detection device (82) are configured to obtain the vehicle contour and detect the carriage of the vehicle when the vehicle passes through the second detection device (82), leave the second detection device (82), measure the speed of the vehicle by dividing the distance between the second detection device (82) and the first detection device (81) by the time interval when the vehicle passes through the second detection device (82) and the first detection device (81), obtain the size of the cab using the measured speed of the vehicle, thereby determining the position of the cab of the moving vehicle in the inspection channel, and further determining the beam output times of the first X-ray accelerator (1) and the second X-ray accelerator (2) so as to output beams respectively after the cab passes through the first X-ray accelerator (1) and the second X-ray accelerator (2).

Images