Object detection device

Abstract

The present disclosure provides an object detection device, including a support structure, a radiation source assembly, and a detector assembly. The support structure is configured to form a passage for the object to be detected to pass through; the radiation source assembly is configured to emit radiation; the detector assembly includes a detector mounting bracket connected to the support structure and a plurality of detection units disposed on the detector mounting bracket. The detection units are configured to receive the transmitted radiation passing through the object to be detected and obtain detection information based on the transmitted radiation. Among them, the support structure includes a vertically adjustable vertical support arm, and the vertical distance from the radiation source assembly to the bottom of the support structure changes with the height of the vertical support arm. The present disclosure also provides another object detection device, which includes a radiation source assembly, a detector assembly, and a controller.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of security inspection, and more particularly to an object detection device. Background Art

[0002] For purposes of ensuring public safety and reducing illegal crimes, etc., objects such as vehicles need to be subject to security inspections at places such as customs, airports, and ports. The security inspection may include detecting whether there are prohibited items in the object. For example, an X-ray type object inspection system can perform non-invasive imaging detection on an object without opening the object such as a vehicle, and has a very wide application in multiple fields such as public security, customs, and border control. In some cases, the object inspection system needs to be transported to different places for inspection. However, some object inspection systems have many components and a complex composition, and the system has a large size, which is not convenient for transportation. Summary of the Invention

[0003] One aspect of the embodiments of the present disclosure provides an object detection device, including: a support structure configured to form a passage for the object to be detected to pass through; a radiation source assembly configured to emit radiation; and a detector assembly including a detector mounting bracket connected to the support structure and a plurality of detection units disposed on the detector mounting bracket, the detection unit being configured to receive the transmitted radiation passing through the object to be detected and obtain detection information based on the transmitted radiation; wherein the support structure includes a vertically adjustable vertical support arm, and the vertical distance from the radiation source assembly to the bottom of the support structure changes with the height of the vertical support arm.

[0004] According to an embodiment of the present disclosure, the radiation source assembly includes a radiation source cabin connected to the support structure and a radiation source located in the radiation source cabin; the radiation source cabin has a plurality of emission positions, and the radiation source is configured to sequentially emit radiation from the plurality of emission positions to the object to be detected in the passage, and the center lines of the radiation emitted from any two of the plurality of emission positions form an angle to perform multi-view transmission on the object to be detected.

[0005] According to an embodiment of the present disclosure, the radiation source is configured as one of the following: the radiation source is a movable radiation source, the movable radiation source is configured to sequentially move to the plurality of emission positions and emit radiation; the radiation source is a distributed radiation source, and a plurality of emission units included in the distributed radiation source correspond to the plurality of emission positions one by one, and the plurality of emission units are configured to sequentially emit radiation; the radiation source includes a plurality of independent radiation sources, the plurality of independent radiation sources are respectively disposed at the plurality of emission positions, and the plurality of independent radiation sources are configured to sequentially emit radiation.

[0006] According to an embodiment of the present disclosure, the vertical support arm includes a first support arm and a second support arm, both the first support arm and the second support arm being telescopic structures; the support structure further includes a transverse cabin connected between the first support arm and the second support arm; the radiation source cabin is connected to the transverse cabin, and the radiation source cabin is configured to move along the extension direction of the transverse cabin.

[0007] According to an embodiment of the present disclosure, the transverse cabin is configured to accommodate a cooling device and a controller; the cooling device is configured to cool the radiation source, and the controller is at least configured to control the radiation source.

[0008] According to an embodiment of the present disclosure, the detector mounting bracket includes a transverse mounting bracket and a vertical mounting bracket, the vertical mounting bracket including a first vertical mounting bracket and a second vertical mounting bracket respectively disposed on both sides of the transverse mounting bracket; wherein, the height of at least one of the first vertical mounting bracket and the second vertical mounting bracket is adjustable; or the height of at least one of the first vertical mounting bracket and the second vertical mounting bracket can change with the change in the height of the vertical support arm.

[0009] According to an embodiment of the present disclosure, the vertical support arm includes a first support arm connected to the first vertical mounting bracket and a second support arm connected to the second vertical mounting bracket; wherein, the bottom of the first vertical mounting bracket is rotatably connected to the bottom of the first support arm, and the first vertical mounting bracket is configured to rotate around the bottom of the first support arm to adjust the height of the first vertical mounting bracket; and / or the bottom of the second vertical mounting bracket is rotatably connected to the bottom of the second support arm, and the second vertical mounting bracket is configured to rotate around the bottom of the second support arm to adjust the height of the second vertical mounting bracket.

[0010] According to an embodiment of the present disclosure, the first support arm includes a first support section and a second support section that is telescopic relative to the first support section; the first vertical mounting bracket includes a first mounting section fixedly connected to the first support section and a second mounting section fixedly connected to the second support section, such that the length of the first vertical mounting bracket changes with the telescoping of the second support section.

[0011] According to an embodiment of the present disclosure, the plurality of emission positions are distributed in a plane perpendicular to the traveling direction defined by the channel; the radiation source is arranged such that the radiation emitted at the plurality of emission positions is coplanar with the plurality of detection units, wherein the radiation source is configured to emit radiation at at least some of the plurality of emission positions that enters the object to be detected at least from the top, and the radiation source emits radiation at at least some of the plurality of emission positions that enters the object to be detected at least from the second side.

[0012] According to an embodiment of the present disclosure, the connection line of the plurality of emission positions is arc-shaped or zigzag-shaped, and the vertical distance from the emission position at the first end to the bottom of the support structure is greater than the vertical distance from the emission position at the second end to the bottom of the support structure; the ray source assembly is located in the corner area of the support structure and is close to the top and the second side of the support structure.

[0013] According to an embodiment of the present disclosure, the vertical support arm includes a first support arm and a second support arm, and the ray source assembly is connected between the first support arm and the second support arm; wherein, the support structure further includes a base connected to the first support arm and the second support arm, and both the first support arm and the second support arm are configured to rotate relative to the base, and during the rotation of the first support arm and the second support arm relative to the base, the height of the ray source assembly changes; or both the first support arm and the second support arm are telescopic structures, and during the telescoping of the first support arm and the second support arm, the height of the ray source assembly changes.

[0014] According to an embodiment of the present disclosure, the object detection device further includes: a controller configured to control the ray source to sequentially emit rays from the plurality of emission positions to the object to be detected, and control the plurality of detection units to sequentially obtain detection information corresponding to the rays emitted from each emission position; a processor configured to obtain a scanned image in the view corresponding to each emission position according to the detection information, and perform three-dimensional reconstruction processing according to the scanned images in the views corresponding to each emission position.

[0015] According to an embodiment of the present disclosure, the ray source assembly further includes a collimator, the collimator is located on the side of the ray source cabin where the rays are emitted, and the collimator is used to adjust the rays emitted from the plurality of emission positions; wherein, when the ray source is a distributed ray source, the collimator is a segmented collimator, and the parameters of each segment of the collimator are adjusted separately; when the ray source includes a plurality of independent ray sources, the collimator is an integral collimator, and the parameters of the integral collimator are adjusted uniformly.

[0016] According to an embodiment of the present disclosure, the object detection device further includes: a conveying device disposed at the bottom of the support structure and configured to convey the object to be detected through the channel; an anti-collision sensor disposed on the vertical support arm and configured to detect the distance between the object to be detected and the vertical support arm; the controller is further configured to: control the conveying device, the ray source, and the plurality of detection units according to the distance between the object to be detected and the vertical support arm.

[0017] According to an embodiment of the present disclosure, the object detection device further includes: an acquisition device configured to acquire identification information of the object to be detected; the processor is further configured to: establish a correspondence between the identification information of the object to be detected and the scanned image.

[0018] According to an embodiment of the present disclosure, the processor is further configured to: determine a target detection mode from a plurality of preset detection modes according to the current detection part of the object to be detected, and detect the object to be detected based on the target detection mode; wherein, in different detection modes, different numbers of emission positions are used to emit rays; in the first scanning mode among the plurality of scanning modes, a single emission position among the plurality of emission positions is used to emit rays; in the second scanning mode among the plurality of scanning modes, the plurality of emission positions are used to emit rays.

[0019] According to an embodiment of the present disclosure, the processor is further configured to: determine one or more target emission positions from the plurality of emission positions according to a user instruction; the controller is further configured to: control the ray source to sequentially emit rays to the object to be detected at the one or more target emission positions.

[0020] According to an embodiment of the present disclosure, the first support section and the second support section are provided with a guiding structure for defining the moving direction of the second support section; and / or the first support section and / or the second support section are provided with a locking device for restricting the movement of the second support section after the second support section moves to a set position of the first support section.

[0021] According to an embodiment of the present disclosure, the object detection device further includes: two protective baffles respectively connected to both sides of the support structure, and the protective baffles have a deployed state and a folded state; wherein, when the protective baffles are in the deployed state, both of the two protective baffles extend along the traveling direction defined by the channel; when the protective baffles are in the folded state, the two protective baffles are folded to both sides of the channel.

[0022] Another aspect of the embodiments of the present disclosure provides an object detection device, including: a ray source assembly, including a ray source cabin and a ray source located in the ray source cabin, the ray source cabin having a plurality of emission positions; a detector assembly, including a detector mounting rack and a plurality of detection units arranged on the detector mounting rack, the detector mounting rack including a transverse mounting rack and a first vertical mounting rack and a second vertical mounting rack respectively arranged on both sides of the transverse mounting rack; and a controller configured to control the ray source to sequentially emit rays from the plurality of emission positions and control the detection units to sequentially receive the rays emitted from each of the plurality of emission positions, wherein the central lines of the rays emitted from any two of the plurality of emission positions form an angle.

[0023] According to an embodiment of the present disclosure, the ray source is configured as one of the following: the ray source is a movable ray source configured to sequentially move to the plurality of emission positions and emit rays; the ray source is a distributed ray source, and a plurality of emission units included in the distributed ray source correspond to the plurality of emission positions one by one, and the plurality of emission units are configured to sequentially emit rays; the ray source includes a plurality of independent ray sources respectively arranged at the plurality of emission positions, and the plurality of independent ray sources are configured to sequentially emit rays.

[0024] According to an embodiment of the present disclosure, the connection line of the plurality of emission positions is in an arc shape or a broken line shape, wherein the vertical distance from the emission position at the first end to the bottom of the object detection device is greater than the vertical distance from the emission position at the second end to the bottom of the object detection device.

[0025] According to an embodiment of the present disclosure, the object detection device can meet the requirements of convenient transportation and quick site transfer, can enable the object detection device to be used at different locations, can be folded during transportation for convenient movement and transportation, and can be unfolded during use to make the device more flexible and maneuverable. Description of the Drawings

[0026] In order to better understand the embodiments of the present disclosure, the embodiments of the present disclosure will be described in detail according to the following drawings:

[0027] Figure 1A and 1B Schematically shows an application scenario of the object detection device according to an embodiment of the present disclosure;

[0028] Figure 2A Schematically shows a front view schematic diagram of the object detection device according to an embodiment of the present disclosure;

[0029] Figure 2B Schematically shows Figure 2A a left view schematic diagram of the shown object detection device;

[0030] Figure 3 Schematically shows a schematic diagram of a ray beam emitted from a transmission position L1 according to an embodiment of the present disclosure;

[0031] Figure 4 Schematically shows a schematic diagram of a ray beam emitted from a transmission position L6 according to an embodiment of the present disclosure;

[0032] Figure 5A Schematically shows a schematic diagram of a ray source cabin located at a first position according to an embodiment of the present disclosure;

[0033] Figure 5B Schematically shows a schematic diagram of a ray source cabin located at a second position according to an embodiment of the present disclosure;

[0034] Figure 6 Schematically shows a schematic diagram of a first vertical mounting bracket and a second vertical mounting bracket in a lowered state according to an embodiment of the present disclosure;

[0035] Figure 7A Schematically shows a schematic diagram of an object detection device according to another embodiment of the present disclosure;

[0036] Figure 7B Schematically shows a schematic diagram of a first vertical mounting bracket in a lowered state according to another embodiment of the present disclosure;

[0037] Figure 8A and Figure 8B Schematically shows a schematic diagram of an object detection device according to another embodiment of the present disclosure;

[0038] Figure 9 Schematically shows a schematic diagram of a ray source assembly according to an embodiment of the present disclosure; and

[0039] Figure 10A 、 10B and 10C schematically shows a schematic diagram of a protective baffle according to an embodiment of the present disclosure. Detailed Description of the Invention

[0040] The specific embodiments of the present disclosure will be described in detail below. It should be noted that the embodiments described here are only for illustrative purposes and are not used to limit the embodiments of the present disclosure. In the following description, in order to provide a thorough understanding of the embodiments of the present disclosure, a large number of specific details are set forth. However, it will be apparent to those of ordinary skill in the art that: the embodiments of the present disclosure do not have to employ these specific details. In other instances, well-known structures, materials, or methods have not been described in detail in order to avoid obscuring the embodiments of the present disclosure.

[0041] Throughout the specification, references to "one embodiment", "an embodiment", "an example", or "an exemplary" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present disclosure. Thus, the phrases "in one embodiment", "in an embodiment", "an example", or "an exemplary" that appear throughout the specification do not necessarily all refer to the same embodiment or example. Additionally, the particular features, structures, or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will understand that the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Embodiments of the present disclosure provide an object detection device, which includes a support structure, a radiation source assembly, and a detector assembly. The support structure is configured to form a passage for the object to be detected to pass through. The radiation source assembly is configured to emit radiation. The detector assembly includes a detector mounting bracket connected to the support structure and a plurality of detection units disposed on the detector mounting bracket. The detection units are configured to receive the transmitted radiation passing through the object to be detected and obtain detection information based on the transmitted radiation. Among them, the support structure includes a vertically adjustable vertical support arm, and the vertical distance from the radiation source assembly to the bottom of the support structure changes with the height of the vertical support arm.

[0043] Figure 1A and 1B Schematically shows an application scenario of the object detection device according to an embodiment of the present disclosure. It should be noted that Figure 1A and 1B The shown is only an example of the scenario where the embodiments of the present disclosure can be applied to help those skilled in the art understand the technical content of the present disclosure, but it does not mean that the embodiments of the present disclosure cannot be used in other devices, systems, environments, or scenarios.

[0044] As Figure 1A and 1B shown, the object detection device 100 according to the embodiments of the present disclosure can be used, for example, to detect a vehicle C. During the detection process, the vehicle C can enter the passage formed by the support structure and slowly pass through the passage. During the slow passage of the vehicle C, each cross-section from the head to the tail of the vehicle C sequentially passes through the plane where the radiation source and the detector are located. Therefore, the object detection device can sequentially scan each cross-section of the vehicle and finally form a scanned image of the entire vehicle.

[0045] The vertical support arm 103 of the object detection device 100 is provided with a height-adjustable structure, such as a telescopic structure. The radiation source assembly 101 can be, for example, close to the top of the support structure, and the detector assembly 102 can be installed at the bottom and side of the support structure. When the height of the vertical support arm 103 changes, the height of the radiation source assembly 101 also changes accordingly, thereby changing the height of the entire object detection device 100. For example, when the device needs to be transported, the height of the vertical support arm 103 can be reduced, and the height of the entire object detection device 100 also decreases accordingly, reducing the volume and facilitating transportation. When the device needs to be used for detection, the height of the vertical support arm 103 can be increased, and the height of the entire object detection device 100 also increases accordingly, so that the vehicle C can pass through the channel and be detected. Herein, the height described in the embodiments of the present disclosure can be understood as the height relative to the bottom of the support structure, that is, the vertical distance from the bottom of the support structure.

[0046] It can be understood that the application scenario in FIG. 1 is only an example. In addition to being applicable to detecting vehicles, this object detection device can also be applied to any other object that needs to be detected.

[0047] Figure 2A Schematically shows a front view schematic diagram of an object detection device 200 according to an embodiment of the present disclosure.

[0048] Figure 2B Schematically shows Figure 2A a left view schematic diagram of the object detection device 200 shown.

[0049] As Figure 2A and Figure 2B shown, the object detection device 200 may include a support structure 210, a radiation source assembly 220, and a detector assembly 230. The support structure 210 is configured to form a channel T for the object to be detected to pass through. The radiation source assembly 220 is configured to emit radiation. The detector assembly 230 includes a detector mounting rack connected to the support structure 210 and a plurality of detection units provided on the detector mounting rack. The detection unit is configured to receive the transmitted radiation passing through the object to be detected and obtain detection information based on the transmitted radiation.

[0050] For example, the support structure 210 includes a vertical support arm, and the vertical support arm may include a first support arm 211 and a second support arm 212 located on both sides of the channel T. In addition, the support structure 210 may further include a horizontal bracket 213 located at the bottom and a horizontal structure 214 located at the top.

[0051] According to an embodiment of the present disclosure, the height of the vertical support arm of the support structure is adjustable. The vertical distance from the radiation source assembly 220 to the bottom of the support structure changes with the change in the height of the vertical support arm.

[0052] For example, the first support arm 211 and the second support arm 212 can be telescopic structures. When the first support arm 211 and the second support arm 212 are shortened, the height of the ray source assembly 220 relative to the bottom of the support structure will also decrease, and the volume of the entire device will be reduced, facilitating movement and transportation. When the first support arm 211 and the second support arm 212 are extended, the height of the ray source assembly 220 relative to the bottom of the support structure will also increase, and the height of the entire device will increase, allowing the object to be detected to pass through the channel.

[0053] According to an embodiment of the present disclosure, the object detection device can meet the requirements of convenient transportation and rapid site transfer, enabling the object detection device to be used at different locations. During transportation, it can be folded to facilitate movement and transportation, and when in use, it can be unfolded to make the device more flexible and maneuverable.

[0054] In some cases, the object inspection system needs to be transferred to different locations for inspection, which requires the object inspection system to be of a smaller size. However, a small object detection device does not have enough space to install a relatively large number of ray sources and detectors required for multi-view detection, and thus cannot meet the requirements of multi-view detection. To simultaneously meet the requirements of multi-view detection and convenient movement and transportation, another embodiment of the present disclosure provides an object detection device that can provide multi-view transmission imaging and can quickly transfer sites.

[0055] The object detection device may include the above-mentioned support structure, ray source assembly, and detector assembly. Among them, the ray source assembly 220 may include a ray source cabin 221 connected to the support structure 210 and a ray source located inside the ray source cabin 221. The ray source cabin 221 has multiple emission positions, and the ray source is configured to sequentially emit rays from the multiple emission positions to the object to be detected in the channel. The centerlines of the rays emitted from any two of the multiple emission positions form an angle to perform multi-view transmission on the object to be detected.

[0056] For example, the ray source cabin 221 can be connected to the transverse structure 214 at the top. The ray source cabin has multiple emission positions, such as six emission positions L1 - L6 shown in Figure 2. The multiple emission positions are respectively at different positions of the channel T, for example, continuously and evenly distributed on the arc from the top to the side of the channel T.

[0057] Combined with Figure 1A and Figure 2AAs shown, the ray source is configured to sequentially emit rays from multiple emission positions L1 to L6 to the object to be detected in the channel T, so as to perform multi-view transmission on the object to be detected. For example, first emit rays from the emission position L1, after a predetermined duration, the emission position L1 stops emitting rays, then emit rays from the emission position L2, and so on, until rays are emitted from the emission position L6 and stop after a predetermined duration to complete a scan of the corresponding cross-section. During the slow passage of the object to be detected through the channel, the ray source emits beams in turn from multiple emission positions L1 to L6 to complete the scanning of each cross-section before and after the object to be detected. The ray source chamber 221 is provided with an exit for each emission position, so that the rays can enter the channel T from the exit. Among them, the center lines of the rays emitted from any two of the multiple emission positions form an angle, that is, the center lines of the rays emitted from any two of the multiple emission positions are not parallel, so as to realize multi-view detection of the object. In the embodiments of the present disclosure, the rays may be, for example, X-rays.

[0058] Figure 3 Schematically shows a schematic diagram of a ray beam emitted from the emission position L1 according to an embodiment of the present disclosure.

[0059] Figure 4 Schematically shows a schematic diagram of a ray beam emitted from the emission position L6 according to an embodiment of the present disclosure.

[0060] As Figure 3 and Figure 4 shown, the ray beams emitted from each emission position may all be fan-shaped and can cover the entire area of the object to be detected. For example, the area between the line connecting the emission position L1 and one side edge E1 of the object to be detected and the line connecting the emission position L1 and the other side edge E2 of the object to be detected is within the radiation range of the ray beam emitted from the emission position L1. Similarly, the area between the line connecting the emission position L6 and the edge E1 of the object to be detected and the line connecting the emission position L6 and the edge E3 is within the radiation range of the ray beam emitted from the emission position L6. According to the embodiments of the present disclosure, the detection units used for the rays emitted from each emission position are also different. For example, the ray beam emitted from the emission position L1 corresponds to at least the detection units between the position D1 and the position D2. The ray beam emitted from the emission position L6 corresponds to at least the detection units between the position D3 and the position D4.

[0061] According to an embodiment of the present disclosure, since the radiation source emits radiation from multiple emission positions in sequence, the detection unit can also receive the radiation emitted from different emission positions in sequence, and the detection unit can be time-division multiplexed. For example, when emitting radiation from the emission position L1, multiple detection units can be used to receive the transmitted radiation after the radiation emitted from the emission position L1 penetrates the object to be detected, and the detection information from the perspective of the emission position L1 can be obtained. When emitting radiation from the emission position L6, multiple detection units can be used to receive the transmitted radiation after the radiation emitted from the emission position L6 penetrates the object to be detected, and the detection information from the perspective of the emission position L6 can be obtained. Then, after the object to be detected passes through the channel, an imaging algorithm can be used to obtain the perspective image corresponding to each perspective according to the detection information, such as the top-view image of the object to be detected and the images at several side views (such as L5 and L6).

[0062] According to an embodiment of the present disclosure, the object detection device can not only achieve multi-perspective transmission imaging but also meet the requirements of convenient transportation and rapid site transfer. It can provide detection images at multiple different angles, avoid the problem of omission caused by object overlap in a single perspective, and can increase the recognition rate of special objects.

[0063] According to an embodiment of the present disclosure, the radiation source can be a movable radiation source, and the movable radiation source is configured to move to multiple emission positions in sequence and emit radiation. For example, only one radiation source device can be provided in the radiation source cabin 221. During the detection process, the radiation source device is controlled to move from the emission position L1 to the emission position L6 in sequence, and emit radiation towards the object to be detected when reaching each emission position. For example, a driving mechanism can also be provided in the radiation source cabin, and the driving mechanism is connected to the radiation source device and can drive the radiation source device to move. Among them, the driving mechanism can be, for example, an electric slide rail mechanism. In an embodiment of the present disclosure, the movable radiation source can be, for example, an accelerator, an X-ray machine, an isotope radiation source, etc. The movable radiation source can be an independent radiation source or a distributed radiation source.

[0064] According to another embodiment of the present disclosure, the radiation source can be a distributed radiation source, and multiple emission units included in the distributed radiation source correspond to the multiple emission positions one by one, and the multiple emission units are configured to emit radiation in sequence. For example, the distributed radiation source can include six emission units, and the six emission units respectively correspond to the corresponding emission positions L1 to L6. During the detection, the six radiation source devices are controlled to emit radiation towards the object to be detected in sequence according to the time sequence.

[0065] For example, a distributed radiation source may include an electron source and an anode. The electron source may have multiple electron emission regions to emit electron beam currents at different positions of the electron source. The anode is arranged corresponding to the electron source, and the surface where the target material of the anode is located is opposite to the surface from which the electron source emits the electron beam current. Each electron beam current generated by each electron emission region generates an X-ray target point at a different position of the anode, and the X-ray target point generates X-rays. Such an X-ray source that generates multiple X-ray target points at different positions of the anode may be referred to as a distributed X-ray source. According to another embodiment of the present disclosure, the radiation source may include a plurality of independent radiation sources, and the plurality of independent radiation sources are respectively arranged at a plurality of emission positions, and the plurality of independent radiation sources are configured to sequentially emit radiation. In this embodiment, an independently emitting radiation source is provided at each emission position, and each radiation source can emit a beam of X-rays.

[0066] In another embodiment of the present disclosure, the radiation source may include a plurality of independent radiation sources, and the plurality of independent radiation sources are respectively arranged at a plurality of emission positions, and the plurality of independent radiation sources are configured to sequentially emit radiation. In this embodiment, an independently emitting radiation source is provided at each emission position, and each radiation source can emit a beam of X-rays. Among them, the independent radiation source may be, for example, an accelerator, an X-ray machine, an isotope light source, etc.

[0067] According to an embodiment of the present disclosure, the object detection device further includes a controller and a processor. The controller may be, for example, a controller provided on the support structure. The controller is used to control the radiation source to sequentially emit radiation to the object to be detected at a plurality of emission positions, and control a plurality of detection units to sequentially obtain detection information corresponding to the radiation emitted from each emission position. The processor may be a processor provided on the support structure. The processor may be, for example, a general microprocessor, an instruction set processor, and / or a related chipset and / or a dedicated microprocessor, etc. In addition, the processor may also be a data processing computer located at the backend. The processor is connected to the detection unit, can acquire the detection information of the detection unit, and obtain a scanned image in the view corresponding to each emission position according to the detection information.

[0068] The processor may also perform three-dimensional reconstruction processing on the scanned image in the view corresponding to each emission position to obtain a three-dimensional image. The three-dimensional image can increase the recognition rate of special objects, enabling the detection personnel to quickly identify special objects. Among them, if only the images in some views of the object to be detected can be obtained, for example, only the top view and several side views can be obtained, then partial 3D reconstruction can be performed to reconstruct the 3D image of a partial area. When the number of views is large enough, conventional algorithms such as filtered back projection reconstruction (FBP) or algebraic reconstruction technique (ART) can be used for 3D reconstruction. When the number of views does not meet the requirements for full reconstruction, sparse angle reconstruction and limited angle reconstruction algorithms can be used.

[0069] According to an embodiment of the present disclosure, a plurality of emission positions are distributed in a plane perpendicular to the traveling direction defined by the channel. The ray source is arranged such that the rays emitted at the plurality of emission positions are coplanar with the plurality of detection units, so that after the rays penetrate the object to be detected, they can accurately enter the detection units.

[0070] According to an embodiment of the present disclosure, the connection line of the plurality of emission positions is arc-shaped or zigzag, and the vertical distance from the emission position at the first end to the bottom of the support structure is greater than the vertical distance from the emission position at the second end to the bottom of the support structure.

[0071] For example, the connection line of the emission positions L1 to L6 can be arc-shaped, and the central angle corresponding to the arc can be 60°, for example. The height of the emission position L1 is greater than the height of the emission position L6, and the heights of the emission positions L1 to L6 can decrease in sequence, for example, so that the rays emitted from some of the plurality of emission positions can at least enter from the top of the object to be detected, and the rays emitted from some of the plurality of emission positions can at least enter from the side of the object to be detected.

[0072] The ray source assembly can be located in the corner area of the support structure and close to the top and the second side of the support structure (the second side can be, for example, Figure 3 and Figure 4 the left side of the orientation shown). For example, the ray source cabin can be arranged at a top corner area of the support structure.

[0073] According to an embodiment of the present disclosure, the ray source is configured such that the rays emitted from some of the plurality of emission positions can at least enter from the top of the object to be detected, and the rays emitted from some of the plurality of emission positions by the ray source can at least enter from the second side of the object to be detected. For example, the rays emitted from the emission position L1 can enter from the top of the object to be detected, the rays emitted from the emission position L4 can enter from the top and the side of the object to be detected, and the rays emitted from the emission position L6 can enter from the second side of the object to be detected.

[0074] Based on the above embodiments, images under multiple consecutive perspectives from the top view to the oblique view and then to the side view can be obtained, further increasing the recognition rate of special objects and facilitating 3D reconstruction.

[0075] Please refer to again Figure 2A and Figure 2B, according to an embodiment of the present disclosure, the vertical support arm includes a first support arm 211 and a second support arm 212, and both the first support arm 211 and the second support arm 212 are telescopic structures. The support structure further includes a transverse cabin 214 connected between the first support arm 211 and the second support arm 212, that is, the transverse structure 214 can be implemented as a cabin, and both sides of the transverse cabin 214 are respectively connected to the first support arm 211 and the second support arm 212. The radiation source cabin 221 is connected to the transverse cabin 214. Specifically, the radiation source cabin 221 can be disposed on the front side of the transverse cabin 214.

[0076] According to an embodiment of the present disclosure, the transverse cabin 214 can be configured to accommodate a cooling device and a controller. Among them, the cooling device is configured to cool the radiation source, and the controller is at least configured to control the radiation source. Among them, the cooling device can adopt an oil cooling method to cool the radiation source.

[0077] According to an embodiment of the present disclosure, when the radiation source cabin is installed on the transverse cabin of the support structure, and the cooling device and the controller of the radiation source are arranged in the transverse cabin, it can not only support the radiation source cabin, but also reasonably arrange the cooling device and the controller of the radiation source, reducing the structural complexity of the radiation source cabin.

[0078] Figure 5A Schematically shows a schematic diagram of the radiation source cabin 521 in the first position according to an embodiment of the present disclosure.

[0079] Figure 5B Schematically shows a schematic diagram of the radiation source cabin 521 in the second position according to an embodiment of the present disclosure.

[0080] As Figure 5A and Figure 5B shown, according to an embodiment of the present disclosure, the radiation source cabin 521 is configured to move along the extending direction of the transverse cabin 514. For example, the radiation source cabin 521 is connected to the transverse cabin 514 through a guide rail 540, and the radiation source cabin 521 can slide horizontally along the guide rail 540. Based on this solution, when in the detection state, the radiation source cabin 521 can be located at a position biased to one side, for example, biased to the left side as shown in Figure 5A to avoid the passage and allow the object to be detected to pass through. When transportation is required, the radiation source cabin 521 can be first moved to the middle, and then the height of the two side support arms can be lowered to avoid interference between the radiation source cabin 521 and the detector mounting frame below during the lowering process.

[0081] Figure 5BAs shown, according to an embodiment of the present disclosure, the detector mounting bracket may include a horizontal mounting bracket 533 and a vertical mounting bracket. The vertical mounting bracket includes a first vertical mounting bracket 531 and a second vertical mounting bracket 532 respectively disposed on both sides of the horizontal mounting bracket 533. Dividing the detector mounting bracket into a three-section type can not only meet the requirement of receiving rays emitted from multiple emission positions, enabling the rays within the angular range of the ray beams emitted from each emission position to be received by the detection unit, but also does not require the bottom mounting bracket to extend a long distance, thereby reducing the lateral width of the device.

[0082] According to an embodiment of the present disclosure, when the ray source assembly is located in the corner area of the support structure and close to the top and the second side of the support structure, the length of the first vertical mounting bracket 531 close to the first side of the support structure may be greater than the length of the second vertical mounting bracket 532 close to the second side of the support structure.

[0083] The detection unit on the detector mounting bracket can receive the rays passing through each vertex of the object to be detected, and thus can cover any ray passing through the object. For example, as shown in combination with Figure 5B and Figure 3 shown, the intersection point D1 of the line connecting the emission position L1 and the object edge E1 with the second vertical mounting bracket 532 is not higher than the detection unit at the top of the second vertical mounting bracket 532, so that the detection unit on the second vertical mounting bracket 532 can receive the rays at the edge. In order to minimize the volume of the device as much as possible, the detection unit at the top of the second vertical mounting bracket 532 can be exactly located on the line connecting the emission position L1 and the object edge E1, so that the second vertical mounting bracket 532 can not only receive the rays at the edge but also have a smaller height. Similarly, as shown in combination with Figure 5B and Figure 4 shown, the detection unit at the top of the first vertical mounting bracket 531 can be exactly located on the line connecting the emission position L6 and the object edge E1.

[0084] According to an embodiment of the present disclosure, the height of at least one of the first vertical mounting bracket 531 and the second vertical mounting bracket 532 is adjustable; or the height of at least one of the first vertical mounting bracket 531 and the second vertical mounting bracket 532 can change with the height of the vertical support arm. Based on this solution, during the process of transitioning to the transportation state, the height of the detector mounting brackets on both sides can be reduced, avoiding the problem that the overall height of the device cannot be further reduced due to the excessive length of the detector mounting brackets.

[0085] Figure 6 Schematically shows a schematic diagram of the first vertical mounting bracket and the second vertical mounting bracket in a lowered state according to an embodiment of the present disclosure.

[0086] As Figure 6As shown, according to an embodiment of the present disclosure, the vertical support arm includes a first support arm 611 connected to the first vertical mounting frame 631 and a second support arm 612 connected to the second vertical mounting frame 632. Among them, the bottom of the first vertical mounting frame 631 is rotatably connected to the bottom of the first support arm 611, and the first vertical mounting frame 631 is configured to rotate around the bottom of the first support arm 611 to adjust the height of the first vertical mounting frame 631; and / or the bottom of the second vertical mounting frame 632 is rotatably connected to the bottom of the second support arm 612, and the second vertical mounting frame 632 is configured to rotate around the bottom of the second support arm 612 to adjust the height of the second vertical mounting frame 632.

[0087] For example, only the first vertical mounting frame 631 can be set as a rotatable connection form, or only the second vertical mounting frame 632 can be set as a rotatable connection form, or both the first vertical mounting frame 631 and the second vertical mounting frame 632 can be set as rotatable connection forms. In the third case, when transportation is required, both the first vertical mounting frame 631 and the second vertical mounting frame 632 can be laid down, and then the radiation source cabin 621 can be directly lowered. That is to say, since the second vertical mounting frame 632 is already in a flat state, there is no need to move the radiation source cabin 621 to the middle, and the radiation source cabin 621 can be directly lowered without interfering with the second vertical mounting frame 632.

[0088] Figure 7A Schematically shown is a schematic diagram of an object detection device according to another embodiment of the present disclosure.

[0089] Figure 7B Schematically shown is a schematic diagram of the first vertical mounting frame in a lowered state according to another embodiment of the present disclosure.

[0090] As Figure 7A and Figure 7B shown, according to an embodiment of the present disclosure, the first support arm 711 includes a first support section and a second support section that is telescopic relative to the first support section. For example, the first support arm 711 can be a telescopic structure, the position of the first support section is fixed, the second support section can move up and down relative to the first support section to realize the telescoping of the first support arm 711, and the first support section can be located below the second support section.

[0091] The first vertical mounting bracket can also be divided into two sections. For example, it can be divided into a first mounting section 7311 and a second mounting section 7312. The first mounting section 7311 can be fixedly connected to the first support section, and the second mounting section 7312 can be fixedly connected to the second support section, so that the length of the first vertical mounting bracket changes with the telescoping of the second support section. For example, when the second support section moves downward, it can drive the second mounting section 7312 to move downward together, and the overall height of the first vertical mounting bracket decreases. When the second support section moves upward, it can drive the second mounting section 7312 to move upward together, and the overall height of the first vertical mounting bracket increases.

[0092] When the length of the second vertical mounting bracket 732 is small, there is no need to set the second vertical mounting bracket 732 as a segmented structure or to lay it down. However, in order to avoid interference between the radiation source cabin 721 and the second vertical mounting bracket 732, the radiation source cabin 721 can be first moved to the middle of the device, and then the height of the radiation source cabin 721 can be reduced.

[0093] Based on the above embodiments, the first vertical mounting bracket can be folded or unfolded simultaneously during the shortening or elongation of the first support arm, which can improve the efficiency of device state conversion and quickly enter the transportation state or the use state.

[0094] According to an embodiment of the present disclosure, the first support section and the second support section can be provided with a guiding structure for defining the moving direction of the second support section. For example, a guiding groove extending along its length direction can be provided on the first support section, and a guiding block can be provided on the second support section. The guiding block can slide along the guiding groove to guide the moving direction of the second support section. In addition, the second support section can be driven to move up and down relative to the first support section by means of hydraulic drive or electric drive.

[0095] According to an embodiment of the present disclosure, the first support section and / or the second support section can be provided with a locking device for restricting the movement of the second support section after it moves to a set position on the first support section. For example, a locking bolt can be provided on the first support section. When the second support section rises to a specified position, the locking bolt can be rotated so that it abuts against the surface of the second support section, and the relative positions of the first support section and the second support section can be fixed by using friction. Or a connecting hole can be provided on the second support section. When the second support section rises to a specified position, the locking bolt can be rotated so that it extends into the connecting hole of the second support section, thereby fixing the relative positions of the first support section and the second support section.

[0096] According to another embodiment of the present disclosure, the vertical support arm of the object detection device includes a first support arm and a second support arm, and the radiation source assembly is connected between the first support arm and the second support arm. Different from the above embodiment, both sides of the radiation source cabin can be directly connected to the first support arm and the second support arm.

[0097] [[ID= and ​ FIG. schematically shows a schematic diagram of an object detection device according to another embodiment of the present disclosure.

[0098] As ​ and ​ shown, both sides of the radiation source cabin 821 can be directly connected to the first support arm 811 and the second support arm 812. In addition, the support structure may further include a base 815 connected to the first support arm and the second support arm. The first support arm 811 and the second support arm 812 are both configured to rotate relative to the base 815. During the rotation of the first support arm 811 and the second support arm 812 relative to the base 815, the height of the radiation source assembly changes.

[0099] For example, the first support arm 811, the second support arm 812, the radiation source cabin 821, and the base 815 may form a four-bar linkage mechanism. During the rotation of the first support arm 811 and the second support arm 812, the radiation source cabin 821 deflects accordingly and the height changes.

[0100] According to an embodiment of the present disclosure, the first support arm and the second support arm may also be configured as telescopic structures. During the telescoping of the first support arm and the second support arm, the height of the radiation source assembly changes.

[0101] ​ FIG. schematically shows a schematic diagram of a radiation source assembly according to an embodiment of the present disclosure.

[0102] As ​ shown, according to an embodiment of the present disclosure, the radiation source assembly further includes a collimator 922. The collimator 922 is located on one side of the radiation emitted from the radiation source cabin 921. The collimator 922 is used to adjust the radiation emitted from multiple emission positions. For example, it can be used to restrict the width of the radiation and ensure that the radiation accurately enters the detection unit. Herein, the radiation width may refer to the size of the radiation beam in the traveling direction of the object to be detected. The collimator 922 can be closely attached below the radiation source cabin 921. The collimator 922 can restrict the radiation emitted from each radiation source in the traveling direction of the object to be detected, so that the radiation emitted from different radiation sources all fall on the plane formed by the detector horizontal mounting frame and the detector vertical mounting frame.

[0103] According to an embodiment of the present disclosure, the radiation source may be a distributed radiation source. The distributed radiation source uses an electron beam to bombard each target point to generate X-rays. For a distributed radiation source, there are certain linearity problems with different target points themselves, and the radiation source cannot be adjusted. In this case, the collimator may adopt a segmented collimator. Each segment of the collimator may correspond to an emission position, and the parameters of each segment of the collimator are adjusted separately. For example, the collimation slits of the corresponding collimator can be adjusted respectively for the beam currents emitted from different target points.

[0104] According to another embodiment of the present disclosure, the radiation source may include a plurality of independent radiation sources, and the collimator is an integral collimator, and the parameters of the integral collimator are adjusted uniformly. For example, the independent radiation source may be an accelerator, an X-ray machine, an isotope light source, etc. Each independent radiation source can be adjusted separately in terms of position and angle. That is to say, the positions of the respective radiation sources can be adjusted in the radiation source cabin. In this case, the integral collimator can be used to overall constrain the widths of the respective radiation beams and filter out the redundant rays in each radiation beam.

[0105] According to an embodiment of the present disclosure, the object detection device may further include a conveying device. The conveying device may be connected to the bottom of the support structure and configured to convey the object to be detected through the channel. For example, the conveying device may be a conveyor, and the conveyor is arranged to convey the object to be detected along the traveling direction defined by the channel. In addition, the conveying device may also be an automated guided vehicle, etc.

[0106] According to an embodiment of the present disclosure, the object detection device may further include a collision avoidance sensor. The collision avoidance sensor may be arranged on the vertical support arm and configured to detect the distance between the object to be detected and the vertical support arm. For example, the distances between the object to be detected and the vertical support arms on both sides can be monitored. The controller is further configured to: control the conveying device, the radiation source, and the multiple detection units according to the distance between the object to be detected and the vertical support arm. For example, when the distance between the object to be detected and the vertical support arm is less than the safety distance, the conveying device can be controlled to stop conveying the object to be detected, and the radiation source and the detection unit can be controlled to stop working. Based on this solution, collisions between the object to be detected and the object detection device during the detection process can be prevented. In another embodiment, if the object to be detected is a vehicle, the driver can drive the vehicle through the channel. When the distance between the vehicle and the vertical support arm is less than the safety distance, a warning can be sent to the driver by using an alarm device.

[0107] According to an embodiment of the present disclosure, the object detection device may further include a collection device. The collection device is configured to collect the identification information of the object to be detected. The processor is further configured to: establish a correspondence between the identification information of the object to be detected and the scanned image.

[0108] For example, an image acquisition device can be used to acquire the license plate image of a vehicle, and a processor can be used to identify the license plate information based on the license plate image. Then, the license plate information can be bound to the scanned image of the vehicle to facilitate subsequent search and retrieval of the required scanned image.

[0109] According to an embodiment of the present disclosure, the processor is further configured to: determine a target detection mode from a plurality of preset detection modes according to the current detection part of the object to be detected, and detect the object to be detected based on the target detection mode. Among them, in different detection modes, different numbers of emission positions are used to emit rays; in the first scanning mode among a plurality of scanning modes, a single emission position among a plurality of emission positions is used to emit rays; in the second scanning mode among a plurality of scanning modes, a plurality of emission positions are used to emit rays.

[0110] For example, a vehicle can include a cab part and a cargo box part. When the cab part moves to the plane where the ray source is located, one or a small number of emission positions can be used to emit rays to avoid harm to the driver. When the cargo box part moves to the plane where the ray source is located, a plurality of emission positions can be used to emit rays to perform multi-view detection of the cargo box. Alternatively, scanning can be skipped when the cab passes through the scanning plane, and multi-view scanning of the cargo box can be performed after bypassing the cab. Alternatively, before detection, the driver can be asked to get off the vehicle first, and then the vehicle can be transported through the passage by a conveying device. In this case, multi-view detection of the entire vehicle can be performed.

[0111] According to an embodiment of the present disclosure, the processor is further configured to: determine one or more target emission positions from a plurality of emission positions according to a user instruction. The controller is further configured to: control the ray source to sequentially emit rays to the object to be detected at one or more target emission positions.

[0112] For example, the detection personnel can specify which emission positions to use to emit rays. Referring to FIG. 2, if the detection personnel only want to detect the image of the object from the top view, the emission positions L1 and L2 can be pre-selected for scanning, and the controller can control the ray source to sequentially emit rays at the emission positions L1 and L2.

[0113] According to an embodiment of the present disclosure, the object detection device may further include two protective baffles.

[0114] ​ 、 10B And FIGS. 10B and 10C schematically show a schematic diagram of the protective baffle according to an embodiment of the present disclosure.

[0115] As ​ 、 10B As shown in FIGS. 10B and 10C, the two protective baffles 1050 are respectively connected to both sides of the support structure. The protective baffle 1050 has an unfolded state and a folded state, wherein,​ The figure shows a schematic diagram of the protective baffle 1050 in the deployed state. When the protective baffle is in the deployed state, both protective baffles extend along the traveling direction defined by the channel, and can play a protective role for the personnel on both sides. ​ The figure shows a schematic diagram of the protective baffle 1050 transitioning from the deployed state to the folded state. ​ The figure shows a schematic diagram of the protective baffle 1050 in the folded state. When the protective baffle is in the folded state, the two protective baffles 1050 are folded to both sides of the channel, and the volume of the entire device is reduced. Then, the device can be placed in a container or on a truck for transportation and transfer.

[0116] Another aspect of the embodiments of the present disclosure provides another object detection device, which may include a radiation source assembly, a detector assembly, and a controller.

[0117] Among them, the radiation source assembly includes a radiation source cabin and a radiation source located in the radiation source cabin, and the radiation source cabin has a plurality of emission positions. The detector assembly includes a detector mounting frame and a plurality of detection units arranged on the detector mounting frame. The detector mounting frame includes a horizontal mounting frame and a first vertical mounting frame and a second vertical mounting frame respectively arranged on both sides of the horizontal mounting frame. The horizontal mounting frame, the first vertical mounting frame, and the second vertical mounting frame are all provided with detection units. The controller is configured to control the radiation source to emit radiation from a plurality of emission positions in sequence, and control the detection units to receive the radiation emitted from each of the plurality of emission positions in sequence. Among them, the central lines of the radiation emitted from any two of the plurality of emission positions form an angle.

[0118] Specifically, for the radiation source assembly and the detector assembly, reference can be made to ​ 、 ​ and ​ . For example, the radiation source cabin may have six emission positions L1 to L6, and the plurality of emission positions are respectively in different orientations of the object channel. The radiation source is configured to emit radiation from the plurality of emission positions L1 to L6 to the object to be detected in the channel in sequence for multi-view transmission of the object to be detected. For example, first emit radiation from the emission position L1, after a predetermined duration, the emission position L1 stops emitting radiation, then emit radiation from the emission position L2, and so on, until radiation is emitted from the emission position L6 and stops after a predetermined duration to complete a scan of a corresponding cross-section. During the process of the object to be detected slowly passing through the channel, the radiation source emits beams in turn from the plurality of emission positions L1 to L6 to complete the scanning of the front and back cross-sections of the object to be detected. Among them, the central lines of the radiation emitted from any two of the plurality of emission positions form an angle, that is, the central lines of the radiation emitted from any two of the plurality of emission positions are not parallel to achieve multi-view detection of the object. In the embodiments of the present disclosure, the radiation may be, for example, X-ray.

[0119] The ray beams emitted from each emission position can all be fan-shaped and can cover the entire area of the object to be detected. For example, the area between the line connecting the emission position L1 and one side edge of the object to be detected and the line connecting the emission position L1 and the other side edge of the object to be detected is within the radiation range of the ray beam emitted from the emission position L1. According to an embodiment of the present disclosure, the detection units used for the rays emitted from each emission position are also different.

[0120] According to an embodiment of the present disclosure, the detector mounting bracket may include a horizontal mounting bracket and a vertical mounting bracket. The vertical mounting bracket includes a first vertical mounting bracket and a second vertical mounting bracket respectively disposed on both sides of the horizontal mounting bracket, and the bottoms of the first vertical mounting bracket and the second vertical mounting bracket may be connected to the horizontal mounting bracket. The detection units on the detector mounting bracket can receive the rays passing through the respective vertices of the object to be detected, and thus can cover any ray passing through the object.

[0121] Dividing the detector mounting bracket into a three-section type can not only meet the requirement of receiving the rays emitted from multiple emission positions, so that the rays within the angular range of the ray beams emitted from each emission position are received by the detection units, but also does not require the mounting bracket at the bottom to extend a long distance, thereby reducing the lateral width of the device. According to an embodiment of the present disclosure, since the ray source emits rays from multiple emission positions in sequence, the detection units can be controlled to receive the rays emitted from different emission positions in sequence, and the detection units can be time-division multiplexed. For example, when emitting rays from the emission position L1, multiple detection units can be used to receive the transmitted rays after the rays emitted from the emission position L1 penetrate the object to be detected, and obtain the detection information from the perspective of the emission position L1. When emitting rays from the emission position L6, multiple detection units can be used to receive the transmitted rays after the rays emitted from the emission position L6 penetrate the object to be detected, and obtain the detection information from the perspective of the emission position L6. Then, when the object to be detected passes through the channel, the imaging algorithm can be used to obtain the perspective image from the corresponding perspective according to the detection information from each perspective. For example, the top-view image of the object to be detected and the images from several side perspectives (such as L5 and L6) can be obtained.

[0122] According to an embodiment of the present disclosure, the ray source is configured as one of the following: (1) The ray source is a movable ray source, and the movable ray source is configured to move to multiple emission positions in sequence and emit rays; (2) The ray source is a distributed ray source, and the multiple emission units included in the distributed ray source correspond to the multiple emission positions one by one, and the multiple emission units are configured to emit rays in sequence; (3) The ray source includes multiple independent ray sources, and the multiple independent ray sources are respectively disposed at multiple emission positions, and the multiple independent ray sources are configured to emit rays in sequence.

[0123] In an embodiment of the present disclosure, only one ray source device may be provided in the ray source chamber. During the detection process, the ray source device is controlled to move from the emission position L1 to the emission position L6 in sequence, and emit rays towards the object to be detected when reaching each emission position. For example, a driving mechanism may also be provided in the ray source chamber. The driving mechanism is connected to the ray source device and can drive the ray source device to move. Among them, the driving mechanism may be, for example, an electric slide rail mechanism. In the embodiments of the present disclosure, the movable ray source may be, for example, an accelerator, an X-ray machine, an isotope ray source, etc. The movable ray source may be an independent ray source or a distributed ray source.

[0124] In another embodiment of the present disclosure, the ray source may be a distributed ray source. The distributed ray source includes multiple emission units, for example, six emission units. The six emission units respectively correspond to the corresponding emission positions L1 to L6. During detection, the six ray source devices are controlled to emit rays towards the object to be detected in sequence according to the time sequence.

[0125] For example, the distributed ray source may include an electron source and an anode. The electron source may have multiple electron emission regions to emit electron beam currents at different positions of the electron source. The anode is arranged corresponding to the electron source. The surface where the target material of the anode is located is opposite to the surface where the electron source emits the electron beam current. Each electron beam current generated by each electron emission region generates an X-ray target point at a different position of the anode, and the X-ray target point generates X-rays. Such an X-ray source that generates multiple X-ray target points at different positions of the anode may be called a distributed X-ray source.

[0126] In another embodiment of the present disclosure, the ray source may include multiple independent ray sources. The multiple independent ray sources are respectively arranged at multiple emission positions, and the multiple independent ray sources are configured to emit rays in sequence. In this embodiment, an independently emitting ray source is provided at each emission position, and each ray source can emit a beam of X-rays. Among them, the independent ray source may be, for example, an accelerator, an X-ray machine, an isotope light source, etc.

[0127] According to the embodiments of the present disclosure, the connection lines of the multiple emission positions are in an arc shape or a broken line shape, and the vertical distance from the emission position at the first end to the bottom of the object detection device is greater than the vertical distance from the emission position at the second end to the bottom of the object detection device.

[0128] For example, the connection lines of the emission positions L1 to L6 may be in an arc shape, the height of the emission position L1 is greater than the height of the emission position L6, and the heights of the emission positions L1 to L6 may decrease in sequence, so that the rays emitted by some of the multiple emission positions can at least enter from the top of the object to be detected, and the rays emitted by some of the emission positions can at least enter from the side of the object to be detected.

[0129] According to an embodiment of the present disclosure, the bottoms of the first vertical mounting bracket and the second vertical mounting bracket are connected to the horizontal mounting bracket. The vertical distance from the top of the first vertical mounting bracket to the horizontal mounting bracket is greater than the vertical distance from the top of the second vertical mounting bracket to the horizontal mounting bracket. The first vertical mounting bracket is close to the emission position at the first end, and the second vertical mounting bracket is close to the emission position at the second end.

[0130] In addition, for other features of the ray source assembly, the detector assembly, and the controller, reference may be made to the descriptions of these three parts in the above embodiments, which will not be elaborated herein.

[0131] Although the present disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above embodiments, but should be determined not only by the appended claims but also by the equivalents of the appended claims.

Claims

1. An object detection device, comprising: A support structure configured to form a passage for the object to be detected to pass through; A ray source assembly configured to emit rays; wherein, the ray source assembly includes a ray source and a ray source cabin, the ray source cabin has a plurality of emission positions, the connection line of the plurality of emission positions is arc-shaped or zigzag-shaped, and the heights of the plurality of emission positions decrease in sequence from the first end to the second end; and A detector assembly, including a detector mounting bracket connected to the support structure and a plurality of detection units arranged on the detector mounting bracket, the detection unit is configured to receive the transmitted rays passing through the object to be detected and obtain detection information based on the transmitted rays; wherein, the detector mounting bracket includes a vertical mounting bracket, the vertical mounting bracket includes a first vertical mounting bracket close to the first side of the support structure and a second vertical mounting bracket close to the second side of the support structure, when the ray source assembly is located in the corner area of the support structure and close to the top and the second side of the support structure, the length of the first vertical mounting bracket is greater than the length of the second vertical mounting bracket; Wherein, the support structure includes a vertically adjustable vertical support arm, the vertical distance from the ray source assembly to the bottom of the support structure changes with the height of the vertical support arm, the detection unit at the top of the first vertical mounting bracket is located on the connection line between the emission position at the second end and the edge of the object, and the detection unit at the top of the second vertical mounting bracket is located on the connection line between the emission position at the first end and the edge of the object.

2. The device according to claim 1, wherein: The ray source cabin is connected to the support structure, and the ray source is located inside the ray source cabin; The ray source is configured to sequentially emit rays from the plurality of emission positions to the object to be detected in the passage, and the center lines of the rays emitted from any two of the plurality of emission positions form an angle to perform multi-viewpoint transmission on the object to be detected.

3. The device according to claim 2, wherein The ray source is configured as one of the following: The ray source is a movable ray source, and the movable ray source is configured to sequentially move to the plurality of emission positions and emit rays; The ray source is a distributed ray source, and the plurality of emission units included in the distributed ray source correspond to the plurality of emission positions one by one, and the plurality of emission units are configured to sequentially emit rays; The ray source includes a plurality of independent ray sources, the plurality of independent ray sources are respectively arranged at the plurality of emission positions, and the plurality of independent ray sources are configured to sequentially emit rays.

4. The device according to claim 2, wherein: The vertical support arm includes a first support arm and a second support arm, and both the first support arm and the second support arm are telescopic structures; The support structure further includes a transverse cabin connected between the first support arm and the second support arm; The ray source cabin is connected to the transverse cabin, and the ray source cabin is configured to move along the extension direction of the transverse cabin.

5. The device according to claim 4, wherein: The transverse cabin is configured to accommodate a cooling device and a controller; The cooling device is configured to cool the radiation source, and the controller is at least configured to control the radiation source.

6. The apparatus according to any one of claims 1 to 5, wherein: The detector mounting bracket further includes a lateral mounting bracket, and the vertical mounting bracket includes the first vertical mounting bracket and the second vertical mounting bracket respectively disposed on both sides of the lateral mounting bracket; Wherein, the height of at least one of the first vertical mounting bracket and the second vertical mounting bracket is adjustable; or the height of at least one of the first vertical mounting bracket and the second vertical mounting bracket can change with the change of the height of the vertical support arm.

7. The apparatus according to claim 6, wherein: The vertical support arm includes a first support arm connected to the first vertical mounting bracket and a second support arm connected to the second vertical mounting bracket; Wherein, the bottom of the first vertical mounting bracket is rotatably connected to the bottom of the first support arm, and the first vertical mounting bracket is configured to rotate around the bottom of the first support arm to adjust the height of the first vertical mounting bracket; and / or the bottom of the second vertical mounting bracket is rotatably connected to the bottom of the second support arm, and the second vertical mounting bracket is configured to rotate around the bottom of the second support arm to adjust the height of the second vertical mounting bracket.

8. The apparatus according to claim 7, wherein: The first support arm includes a first support section and a second support section that is telescopic relative to the first support section; The first vertical mounting bracket includes a first mounting section fixedly connected to the first support section and a second mounting section fixedly connected to the second support section, such that the length of the first vertical mounting bracket changes with the telescoping of the second support section.

9. The apparatus according to claim 4, wherein: The plurality of emission positions are distributed in a plane perpendicular to the traveling direction defined by the channel; The radiation source is arranged such that the radiation emitted at the plurality of emission positions is coplanar with the plurality of detection units; Wherein, the radiation source is configured such that the radiation emitted at some of the plurality of emission positions enters at least from the top of the object to be detected, and the radiation emitted by the radiation source at some of the plurality of emission positions enters at least from the second side of the object to be detected.

10. The apparatus according to claim 1 or 2, wherein: The vertical support arm includes a first support arm and a second support arm, and the radiation source assembly is connected between the first support arm and the second support arm; Wherein, The support structure further includes a base connected to the first support arm and the second support arm, and both the first support arm and the second support arm are configured to rotate relative to the base, and during the rotation of the first support arm and the second support arm relative to the base, the height of the radiation source assembly changes; or Both the first support arm and the second support arm are telescopic structures, and during the telescoping of the first support arm and the second support arm, the height of the radiation source assembly changes.

11. The apparatus according to claim 2, further comprising: A controller, configured to control the radiation source to sequentially emit radiation from the plurality of emission positions towards the object to be detected, and control the plurality of detection units to sequentially obtain detection information corresponding to the radiation emitted from each emission position; A processor, configured to obtain a scanned image at the viewing angle corresponding to each emission position according to the detection information, and perform three-dimensional reconstruction processing based on the scanned images at the viewing angles corresponding to each emission position.

12. The apparatus according to claim 3, wherein: The radiation source assembly further includes a collimator, which is located on one side of the radiation emitted from the radiation source chamber, and the collimator is used to adjust the radiation emitted from the plurality of emission positions; Wherein, When the radiation source is a distributed radiation source, the collimator is a segmented collimator, and the parameters of each segment of the collimator are adjusted separately; When the radiation source includes a plurality of independent radiation sources, the collimator is an integral collimator, and the parameters of the integral collimator are adjusted uniformly.

13. The apparatus according to claim 11, further comprising: A conveying device, disposed at the bottom of the support structure, configured to convey the object to be detected through the channel; An anti-collision sensor, disposed on the vertical support arm, configured to detect the distance between the object to be detected and the vertical support arm; The controller is further configured to: control the conveying device, the radiation source, and the plurality of detection units according to the distance between the object to be detected and the vertical support arm.

14. The apparatus according to claim 11, further comprising: An acquisition device, configured to acquire identification information of the object to be detected; The processor is further configured to: establish a correspondence between the identification information of the object to be detected and the scanned image.

15. The apparatus according to claim 11, wherein: The processor is further configured to: determine a target detection mode from a plurality of preset detection modes according to the current detection part of the object to be detected, and detect the object to be detected based on the target detection mode; Wherein, in different detection modes, different numbers of emission positions are used to emit radiation; in the first detection mode among the plurality of detection modes, a single emission position among the plurality of emission positions is used to emit radiation; in the second detection mode among the plurality of detection modes, the plurality of emission positions are used to emit radiation.

16. The apparatus according to claim 11, wherein: The processor is further configured to: determine one or more target emission positions from the plurality of emission positions according to a user instruction; The controller is further configured to: control the radiation source to sequentially emit radiation towards the object to be detected at the one or more target emission positions.

17. The apparatus according to claim 8, wherein: The first support section and the second support section are provided with a guiding structure for defining the moving direction of the second support section; and / or The first support section and / or the second support section are provided with a locking device for restricting the movement of the second support section after the second support section moves to a set position of the first support section.

18. The apparatus according to claim 1 or 2, further comprising: Two protective baffles are respectively connected to both sides of the support structure, and each of the protective baffles has a deployed state and a folded state; wherein, when the protective baffle is in the deployed state, both of the two protective baffles extend along the traveling direction defined by the channel; when the protective baffle is in the folded state, the two protective baffles are folded to both sides of the channel.

19. An object detection device, comprising: a support structure configured to form a channel for a detected object to pass through; a ray source assembly, including a ray source chamber and a ray source located in the ray source chamber, the ray source chamber having a plurality of emission positions, the connection line of the plurality of emission positions being arc-shaped or zigzag, and the heights of the plurality of emission positions decreasing sequentially from a first end to a second end; a detector assembly, including a detector mounting frame and a plurality of detection units arranged on the detector mounting frame, the detector mounting frame including a transverse mounting frame and a first vertical mounting frame and a second vertical mounting frame respectively arranged on both sides of the transverse mounting frame, the first vertical mounting frame being close to the first side portion of the support structure, and the second vertical mounting frame being close to the second side portion of the support structure; and a controller configured to control the ray source to emit rays from the plurality of emission positions in sequence, and control the detection units to receive the rays emitted from each of the plurality of emission positions in sequence, wherein, the center lines of the rays emitted from any two of the plurality of emission positions form an included angle; wherein, when the ray source assembly is located in the corner area of the support structure and close to the top and the second side portion of the support structure, the length of the first vertical mounting frame is greater than the length of the second vertical mounting frame, the detection unit at the top of the first vertical mounting frame is located on the connection line between the emission position at the second end and the edge of the object, and the detection unit at the top of the second vertical mounting frame is located on the connection line between the emission position at the first end and the edge of the object.

20. The apparatus according to claim 19, wherein, The ray source is configured as one of the following: The ray source is a movable ray source configured to move to the plurality of emission positions in sequence to emit rays; The ray source is a distributed ray source, and a plurality of emission units included in the distributed ray source correspond to the plurality of emission positions one by one, and the plurality of emission units are configured to emit rays in sequence; The ray source includes a plurality of independent ray sources respectively arranged at the plurality of emission positions, and the plurality of independent ray sources are configured to emit rays in sequence.

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