Scattering imaging device and scattering imaging control system

Abstract

The application discloses a scattering imaging device and a scattering imaging control system, and relates to the technical field of scattering imaging. In the scattering imaging device, a ray source is used for emitting a ray beam; a first collimating structure comprises a first shielding cavity and a first through hole, the ray source is arranged in the first shielding cavity, and the first through hole is used for limiting the shape of the ray beam to form a first beam; a second collimating structure comprises a second shielding cavity and a second through hole, the first collimating structure is arranged in the second shielding cavity, and the second through hole is used for adjusting the shape of the first beam to form a second beam; wherein, the first collimating structure and the second collimating structure are both provided with shielding layers, so as to shield the ray beam not passing through the first through hole in the first shielding cavity, and shield the first beam not passing through the second through hole in the second shielding cavity. The scattering imaging device disclosed by the application simplifies the structure of the scattering imaging device, reduces the volume, and is convenient to install.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scatter imaging, and particularly relates to a scatter imaging device and a scatter imaging control system. BACKGROUND

[0002] Scatter imaging is a kind of radiation imaging technology, which obtains a scatter image of a scanned object by sequentially irradiating each position of the object with a ray emitted by a ray source, receiving a scatter signal of the corresponding position by a detector, and processing the signal by electronics and a computer.

[0003] In the related art, a commonly used ray source control device is mainly based on a "flying point" technology or a variant thereof, wherein the ray source is an X-ray machine, and thus a shielding body needs to be additionally installed at a side, a rear, or the like of the ray source mechanism. Meanwhile, a high-voltage and cooling system matched with the X-ray machine ray source is large in size, resulting in a complex, large, and high-maintenance-cost overall device. SUMMARY

[0004] To solve the above problems, the scatter imaging device provided by the present application simplifies the structure of the scatter imaging device, reduces the size, and facilitates installation.

[0005] In a first aspect, the present application provides a scatter imaging device, which comprises a ray source, a first collimating structure, and a second collimating structure. The ray source is configured to emit a ray beam. The first collimating structure comprises a first shielding cavity and a first through hole. The ray source is arranged in the first shielding cavity. The first through hole is configured to limit the shape of the ray beam to form a first beam. The second collimating structure comprises a second shielding cavity and a second through hole. The first collimating structure is arranged in the second shielding cavity. The second through hole is configured to adjust the shape of the first beam to form a second beam. The first collimating structure and the second collimating structure are both provided with a shielding layer. The shielding layer is configured to shield the ray beam that does not pass through the first through hole in the first shielding cavity, and to shield the first beam that does not pass through the second through hole in the second shielding cavity.

[0006] The scattering imaging device provided in the application, the ray source is arranged in the first shielding cavity of the first collimating structure, the first collimating structure further comprises a first through hole, part of the ray beam emitted by the ray source can be emitted from the first through hole to the first shielding cavity to form a first beam, and the shape of the first beam changes with the shape of the first through hole. Since the first collimating structure is arranged in the second shielding cavity of the second collimating structure, the second collimating structure further comprises a second through hole, the first beam can be emitted from the second through hole to the second shielding cavity to form a second beam, and at this time, the shape of the second beam changes with the shape of the second through hole. Since the first collimating structure and the second collimating structure are both provided with shielding layers, the ray beams that do not pass through the first through hole and the second through hole can be shielded in the first shielding cavity and the second shielding cavity. That is, through the first collimating structure and the second collimating structure, the ray beams emitted by the ray source can form the first beam and the second beam, and other ray beams can also be shielded in the first shielding cavity and the second shielding cavity. In this way, the shielding of the ray source and the shape formation of the ray beam can be integrated in the first collimating structure and the second collimating structure.

[0007] Compared with the complex component layout in the related art, the volume is reduced, the structure of the scattering imaging device is simplified and optimized. In this way, not only the space resource is saved, but also the mobility and deployment flexibility of the scattering imaging device are improved, so that the scattering imaging device can be more widely applied to different scenes and environments. In addition, the scattering imaging device provided in the application reduces the required steps and time in the assembly and configuration process, reduces the installation difficulty and cost. The operator can complete the deployment and debugging of the device more quickly, thereby improving the work efficiency and overall performance.

[0008] In a possible implementation manner of the application, the scattering imaging device further comprises a support, the first collimating structure is mounted on the support, and the second collimating structure is rotatably mounted on the support and can rotate relative to the first collimating structure to overlap part of the second through hole with the first through hole.

[0009] In a possible implementation manner of the application, the scattering imaging device further comprises a driving member connected with the second collimating structure to drive the second collimating structure to rotate relative to the first collimating structure.

[0010] In a possible implementation manner of the application, the scattering imaging device further comprises an identification structure arranged on the second collimating structure, a detector configured to identify the identification structure to obtain a rotation parameter of the second collimating structure relative to the first collimating structure, and a controller configured to control the ray source and the driving member based on the rotation parameter.

[0011] In a possible implementation of the present application, the scatter imaging device further comprises a movable rod movably penetrating through the first collimating structure and connected with the ray source; the movable rod can drive the ray source to move to a storage position and a working position relative to the first shielding cavity; when the ray source is in the working position, the ray source is aligned with the first through hole; when the ray source is in the storage position, the ray source is aligned with the shielding layer.

[0012] In a possible implementation of the present application, the first collimating structure is rotatably arranged on the support, and the first collimating structure rotates relative to the support to adjust the angle of the first through hole relative to the support.

[0013] In a possible implementation of the present application, the support comprises a limiting guide arranged around the axis of the second collimating structure, and the second collimating structure is connected with the limiting guide; the limiting guide is used to provide a limit for the second collimating structure, and / or the second collimating structure can rotate along the limiting guide.

[0014] In a possible implementation of the present application, the first through hole is arranged on the circumferential side of the first collimating structure, and the extension direction of the first through hole is parallel to the axial direction of the first collimating structure; the second through hole is arranged on the circumferential side of the second collimating structure, and the extension direction of the second through hole has an included angle with the extension direction of the first through hole.

[0015] In a possible implementation of the present application, the second through hole is a plurality of second through holes, and the plurality of second through holes are arranged uniformly along the circumferential direction of the second collimating structure.

[0016] In a second aspect, the present application provides a scatter imaging control system. The scatter imaging control system comprises the scatter imaging device in any one of the above aspects; the scatter imaging control system further comprises an information acquisition device, and the information acquisition device is used to acquire a scattered beam formed by the second beam on a to-be-detected object. The scatter imaging control system provided by the present application has the same technical effects as the above-mentioned scatter imaging device, that is, the structure of the scatter imaging device is simplified, the volume is reduced, and the installation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of an internal structure of a scatter imaging device provided by an embodiment of the present application;

[0018] Figure 2 FIG. 2 is another schematic diagram of an internal structure of a scatter imaging device provided by an embodiment of the present application;

[0019] Figure 3 FIG. 3 is a schematic diagram of an unfolded first collimating structure of a scatter imaging device provided by an embodiment of the present application;

[0020] Figure 4An expanded schematic view of a second collimating structure of the scatter imaging device provided in the embodiments of the present application;

[0021] Figure 5 A relationship diagram between a first through hole and a ray source of the scatter imaging device provided in the embodiments of the present application;

[0022] Figure 6 A relationship diagram between a second through hole and a ray source of the scatter imaging device provided in the embodiments of the present application;

[0023] Figure 7 A partially hidden structure schematic view of the scatter imaging device provided in the embodiments of the present application (top view);

[0024] Figure 8 A partially hidden structure schematic view of the scatter imaging device provided in the embodiments of the present application (bottom view);

[0025] Figure 9 A structure schematic view of the scatter imaging control system provided in the embodiments of the present application.

[0026] Reference signs:

[0027] 1-ray source; 2-first collimating structure; 21-first shielding cavity; 22-first through hole; 3-second collimating structure; 31-second shielding cavity; 32-second through hole; 33-gear; 4-bracket; 41-limiting guide; 42-upper cover; 421-adjusting opening; 43-lower cover; 45-limiting piece; 5-driving piece; 6-identification structure; 61-first identification; 62-second identification; 7-detector; 8-moving rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0029] In the embodiments of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0030] In addition, in the embodiments of the present application, the directional terms such as "upper", "lower", "left" and "right" are defined relative to the orientation in which the components in the drawings are placed, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation in which the components are placed in the drawings.

[0031] In the embodiments of the present application, unless specifically defined and limited otherwise, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium.

[0032] In the embodiments of the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or apparatus. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of additional identical elements in the process, method, article or apparatus including the element.

[0033] In the embodiments of the present application, the word "exemplary" or "for example" is used to mean serving as an example, instance or illustration. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or designs. In fact, the word "exemplary" or "for example" is used to present concepts in a concrete manner.

[0034] Scattering imaging is a kind of radiation imaging technology, and its basic method is to collimate the ray source into a pencil beam, use the collimated rays to irradiate each position of the detected object in turn, receive the scattering signals of the corresponding positions by the detector, and finally obtain the scattering image of the scanned object after the signals are processed by electronics and computer. The currently commonly used ray source control device is mainly based on "flying point" technology or its variants.

[0035] Among them, the ray source is an X-ray machine, the rays emitted from the X-ray machine first pass through a slit "wall", so that the rays are collimated into a vertical thin fan-shaped beam, and then the collimated rays pass through a chopping wheel, the chopping wheel is "carved" with a rotatable slit along the radial direction, when the chopping wheel rotates, the rays are further collimated into a pencil beam moving up and down reciprocally, with the movement of the measured object, the collimated pencil beam hits each position of the measured object in turn at different times, so that the detector only receives the signals scattered back from one irradiation point of the measured object in a certain period of time, and thus a complete scattering image can be obtained.

[0036] However, in the related art, a shielding body needs to be additionally installed at a side, rear, or the like of the ray source mechanism; meanwhile, a high-voltage, cooling, or the like system matched with the X-ray machine ray source is large in size, resulting in a complex, large, and high-maintenance-cost overall device.

[0037] The scattering imaging control system provided in the embodiments of the present application includes the scattering imaging device in any of the above embodiments; the scattering imaging control system further includes an information acquisition device configured to acquire a scattered beam formed by the second beam on the object to be detected.

[0038] In the embodiments of the present application, the scattering imaging device is configured to generate and modulate the ray source 1 to form a specific ray beam (such as a pencil beam or a line beam) and irradiate the object to be detected. The scattering imaging device can include a ray source 1 (such as an X-ray source 1), a collimator, a chopping wheel (or a rotatable drum), and the like, for controlling the direction and intensity of the rays. For example, in the embodiments provided in the present application, the second beam in the scattering imaging device is emitted by the ray source 1, and the scattered beam is formed on the object to be detected.

[0039] In the embodiments of the present application, the information acquisition device is configured to capture the scattered beam formed by the second beam on the object to be detected. The information acquisition device can be a high-sensitivity detector array or the like, capable of accurately measuring the intensity, direction, and distribution of the scattered beam. By transmitting this information to a subsequent data processing module, three-dimensional reconstruction or high-precision imaging of the internal structure of the object to be detected can be achieved.

[0040] With reference to Figure 9 In the embodiments of the present application, the scattering imaging control system can further include a power module, a driving module, a control module, a communication module, and the like. The driving module can be connected with a motor, for driving the scattering imaging device to work. The control unit is connected with a liquid crystal display (LCD) screen, and the LCD screen is configured to display parameters of each part in the scattering imaging control system. The communication module can be connected with a balanced voltage digital interface circuit (RS422), for remote data transmission, such as remote control, remote monitoring, remote data acquisition, and the like.

[0041] The scattering imaging control system provided in the embodiments of the present application is generally applicable to cargo detection, such as luggage inspection, vehicle inspection, and the like.

[0042] With reference to Figure 1 , Figure 2 , Figure 3 and Figure 4The embodiment of the present application provides a scattering imaging device, and the present application provides a scattering imaging device, which comprises a ray source 1, a first collimating structure 2 and a second collimating structure 3. The ray source 1 is used for emitting a ray beam; the first collimating structure 2 comprises a first shielding cavity 21 and a first through hole 22, the ray source 1 is arranged in the first shielding cavity 21, and the first through hole 22 is used for limiting the shape of the ray beam to form a first beam; the second collimating structure 3 comprises a second shielding cavity 31 and a second through hole 32, the first collimating structure 2 is arranged in the second shielding cavity 31, and the second through hole 32 is used for adjusting the shape of the first beam to form a second beam; wherein the first collimating structure 2 and the second collimating structure 3 are both provided with shielding layers, so as to shield the ray beam not passing through the first through hole 22 in the first shielding cavity 21; and the first beam not passing through the second through hole 32 is shielded in the second shielding cavity 31.

[0043] In the embodiment of the present application, the ray source 1 is used for emitting a high-energy ray beam, such as X-ray or gamma ray, and the ray beam is used for subsequent scattering imaging process.

[0044] In the embodiment of the present application, the first shielding cavity 21 is used for accommodating the ray source 1, and effectively shields the ray beam not passing through the first through hole 22, so as to prevent the ray beam from leaking to the outside space, thereby reducing the potential harm to the environment and the operator. The second shielding cavity 31 is used for accommodating the first collimating structure 2, and further shields the first beam not passing through the second through hole 32, so that only the ray beam (i.e. the second beam) passing through the shape adjustment twice can be emitted from the second collimating structure 3.

[0045] In the embodiment of the present application, the shapes of the first collimating structure 2 and the second collimating structure 3 can be adjusted according to requirements, which can be a cylinder, a cuboid, a prism and the like. In the example of the embodiment provided by the present application, the first collimating structure 2 and the second collimating structure 3 are cylindrical.

[0046] In the embodiment of the present application, the ray source 1 is arranged in the first shielding cavity 21. In order to improve the shielding effect of the first collimating structure 2 on the ray beam, the first collimating structure 2 can be arranged as a hollow cylindrical structure, and the first shielding cavity 21 is formed in the inside. The ray source 1 is arranged in the first shielding cavity 21, and the ray beam can only be emitted out of the first shielding cavity 21 through the first through hole 22.

[0047] In another embodiment, in order to facilitate the installation and replacement of the ray source 1, the first collimating structure 2 can also be arranged as a cylindrical structure, the ray source 1 is arranged in the cylinder, and the openings at both ends of the cylinder are sealed by using materials capable of shielding the ray beam. In this way, when the ray source 1 needs to be replaced and maintained, the openings at both ends of the cylinder can be opened for operation.

[0048] In the embodiments of the present application, the second collimating structure 3 can also be a hollow cylindrical structure or a circular cylindrical structure, which can be adjusted according to the requirements of the scatter imaging device, and the present application does not limit this. For example, the second collimating structure 3 adopts a hollow cylindrical structure.

[0049] In the embodiments of the present application, the first through hole 22 is used to limit the shape of the ray beam, forming a first beam with a specific shape and strength; the second through hole 32 is used to further adjust the shape of the first beam, forming a second beam with higher precision and more specific shape. The shape and position of the first through hole 22 and the second through hole 32 can be adjusted according to the requirements of imaging, and the present application does not limit this.

[0050] In the embodiments of the present application, the first collimating structure 2 and the second collimating structure 3 are both provided with shielding layers inside, which can be made of high-density shielding materials, capable of effectively absorbing and blocking the ray beams that do not pass through the through holes, ensuring the accurate regulation and safety of the rays. In addition, the first collimating structure 2 and the second collimating structure 3 can be directly made of materials capable of shielding rays, such as lead, depleted uranium, etc.

[0051] For example, in the embodiments provided by the present application, in order to further reduce the volume of the scatter imaging device, the first collimating structure 2 is made of depleted uranium material with stronger shielding performance, and the second collimating structure 3 is made of lead, and the outside of the second collimating structure 3 is further wrapped with stainless steel.

[0052] For example, taking a cesium-137 (Cs-137) radioactive source with an activity of not more than 2.5 curie (Ci) as an example, in order to make the dose rate at the surface of the scatter imaging device 5 centimeters away not more than 2.5 microsieverts per hour (uSv / h), effective shielding measures need to be taken for the radioactive source. According to the calculation, if pure lead is used as the shielding material, the required equivalent lead shielding thickness is about 12.0 centimeters. In order to further reduce the volume of the device while ensuring safety, a double-layer shielding of depleted uranium (a material with high density and effective ray absorption, but attention should be paid to its radioactivity and handling safety) combined with lead can be selected. At this time, the first collimating structure 2 is shielded by depleted uranium, and the shielding thickness of the first collimating structure 2 can be designed to be 5.0 centimeters; the second collimating structure 3 is further shielded by lead, and the thickness of the lead layer can also be 5.0 centimeters.

[0053] The scattering imaging device in the embodiments of the present application, the ray source 1 is arranged in the first shielding cavity 21 of the first collimating structure 2, the first collimating structure 2 further comprises a first through hole 22, part of the ray beam emitted by the ray source 1 can be emitted from the first through hole 22 to the first shielding cavity 21 to form a first beam, and the shape of the first beam changes with the shape of the first through hole 22. Since the first collimating structure 2 is arranged in the second shielding cavity 31 of the second collimating structure 3, the second collimating structure 3 further comprises a second through hole 32, the first beam can be emitted from the second through hole 32 to the second shielding cavity 31 to form a second beam, and at this time, the shape of the second beam changes with the shape of the second through hole 32. Since the first collimating structure 2 and the second collimating structure 3 are both provided with shielding layers, the ray beams that do not pass through the first through hole 22 and the second through hole 32 can be shielded in the first shielding cavity 21 and the second shielding cavity 31. That is, through the first collimating structure 2 and the second collimating structure 3, the ray beams emitted by the ray source 1 can form the first beam and the second beam, and other ray beams can be shielded in the first shielding cavity 21 and the second shielding cavity 31. In this way, the shielding of the ray source 1 and the shape formation of the ray beam can be integrated in the first collimating structure 2 and the second collimating structure 3.

[0054] Compared with the complex component layout in the related art, the volume is reduced, the structure of the scattering imaging device is simplified and optimized. In this way, not only the space resource is saved, but also the mobility and deployment flexibility of the scattering imaging device are improved, so that the scattering imaging device can be more widely applied to different scenes and environments. In addition, the scattering imaging device of the present application reduces the required steps and time in the assembly and configuration process, reduces the installation difficulty and cost. The operator can complete the deployment and debugging of the device more quickly, thereby improving the work efficiency and overall performance.

[0055] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In some possible embodiments of the present application, the scattering imaging device further comprises a support 4, the first collimating structure 2 is installed on the support 4, and the second collimating structure 3 is rotatably installed on the support 4. The second collimating structure 3 can rotate relative to the first collimating structure 2 to overlap part of the second through hole 32 with the first through hole 22.

[0056] In the embodiments of the present application, the support 4 provides a mounting basis and support for the first collimating structure 2 and the second collimating structure 3, and the support 4 is provided with an opening allowing the second beam to pass through, and the position of the opening is arranged in position with the position of the overlapping part of the first through hole 22 and the second through hole 32.

[0057] In the embodiment of the present application, the second through hole 32 partially overlaps the first through hole 22, which can be understood as the overlap between the projection of the partial area of the second through hole 32 and the first through hole 22 along the trajectory of the ray beam emission in the radial direction of the first collimating cylinder and the second collimating cylinder. The overlapping area allows the first beam to be emitted from the second shielding cavity 31.

[0058] The scattering imaging device in the embodiment of the present application can rotate the second collimating structure 3 relative to the first collimating structure 2, and adjust the angle between the first through hole 22 and the second through hole 32, so that the partial area of the second through hole 32 overlaps the first through hole 22, and the shape of the second beam is adjusted to the shape of the overlapping area of the second through hole 32 and the first through hole 22. With the rotation of the second collimating structure 3, the shape of the second beam changes, so that the second beam can be locally emitted onto the object to be measured.

[0059] Referring to Figure 1 and Figure 2 In some possible embodiments of the present application, the scattering imaging device further comprises a driving member 5 connected with the second collimating structure 3 to drive the second collimating structure 3 to rotate relative to the first collimating structure 2.

[0060] In the embodiment of the present application, the driving member 5 can be a motor, a pneumatic drive or the like. For example, in the embodiment provided in the present application, a gear 33 adapted to the driving member 5 is further arranged on the outer periphery of the second collimating cylinder, and the gear 33 is in meshing connection with the driving member 5. The driving member 5 provides driving force to the gear 33 to drive the gear 33 to rotate, thereby driving the second collimating structure 3 to rotate relative to the first collimating structure 2.

[0061] In the embodiment of the present application, the driving member 5 can also be connected with a control unit, and the driving member 5 can receive the signal of the control unit to drive the gear 33 to rotate at a set speed.

[0062] The scattering imaging device in the embodiment of the present application can drive the second collimating structure 3 to rotate relative to the first collimating structure 2 by the driving member 5, and can adjust the rotation speed of the second collimating structure 3 in real time and accurately according to the need by controlling the driving member 5, so as to optimize the projection direction and angle of the ray beam, thereby improving the imaging quality, which improves the working efficiency of the scattering imaging device and improves the imaging quality.

[0063] Referring to Figure 3 and Figure 4In some possible embodiments of the present application, the scattering imaging device further comprises a marking structure 6 arranged on the second collimating structure 3; a detector 7 configured to identify the marking structure 6 to obtain a rotation parameter of the second collimating structure 3 relative to the first collimating structure 2; and a controller configured to control the radiation source 1 and the driving member 5 based on the rotation parameter.

[0064] In the embodiments of the present application, the marking structure 6 is arranged on the second collimating structure 3, and the marking structure 6 can be a physical mark (such as a bar code, a two-dimensional code, a magnetic stripe, an optical mark, etc.) or an electronic mark (such as an RFID tag, a wireless sensor, etc.). The marking structure 6 is used to provide a reference point or information that can be identified to the detector 7, so as to determine the current rotation state or position of the second collimating structure 3.

[0065] In the embodiments of the present application, the marking structure 6 comprises a first mark 61 and a second mark 62, the first mark 61 is used for the detector 7 to detect the start of each scan, and the second mark 62 is used for the detector 7 to detect the speed of the rotation of the second collimating structure 3. For example, the first mark 61 is arranged at the starting position of the second through hole 32, that is, the position at which the second through hole 32 first overlaps with the first through hole 22 in the rotation state. The second mark 62 is uniformly distributed on the second collimating structure 3, and can reflect the selected speed of the second collimating structure 3 when the second collimating structure 3 rotates.

[0066] In the embodiments of the present application, the type of the detector 7 depends on the type of the marking structure 6, and the detector 7 can be an optical detector 7 (such as a camera, a bar code reader), a magnetic detector 7, an RFID reader, a wireless sensor network, etc. The detector 7 is configured to be able to identify and read the information provided by the marking structure 6. By identifying the information, the detector 7 can calculate the rotation parameter of the second collimating structure 3 relative to the first collimating structure 2, such as the rotation angle, the rotation direction, etc.

[0067] For example, in the embodiments provided in the present application, the detector 7 is a photoelectric sensor, the photoelectric sensor is used to obtain the rotation speed and the scanning position of the scattering imaging device, the emitting end and the receiving end of the photoelectric sensor are respectively arranged on the inner side and the outer side of the second collimating structure 3, when the collimating cylinder rotates, the photoelectric sensor can detect a continuous on-off signal through the second mark 62, thereby calculating and obtaining the current scanning position and speed, and the speed value is fed back to the control unit.

[0068] Taking vehicle inspection as an example, if the relative speed between the detector 7 and the vehicle is 0.1 meter per second (m / s), and the horizontal detection resolution is required to be 5 millimeters per second (mm / s), then the scanning speed of the scattering imaging device should reach 20 revolutions per second, and when four scanning lines are designed on the second collimating structure 3, the rotation speed of the second collimating structure 3 should reach 5 revolutions per second.

[0069] In the embodiments of the present application, the controller is configured to receive the rotation parameter information from the detector 7 and accurately control the ray source 1 and the driving member 5 based on the information. The logic of the controller for controlling the ray source 1 can be that, based on the rotation parameter, the controller can adjust the emission angle, intensity or pulse width of the ray source 1. The logic of the controller for controlling the driving member 5 can be that, if the position or angle of the second collimating structure 3 needs to be adjusted, the controller can drive the rotation of the driving member 5 by sending instructions to the driving member 5 until the desired rotation parameter is reached, so that the ray beam can pass through the second collimating structure 3 and be projected to the target area.

[0070] With reference to Figure 1 and Figure 2 In some possible embodiments of the present application, the scatter imaging device further comprises a movable rod 8 movably penetrating through the first collimating structure 2 and connected with the ray source 1; the movable rod 8 can drive the ray source 1 to move to the storage position and the working position relative to the first shielding cavity 21; when the ray source 1 is in the working position, the ray source 1 is aligned with the first through hole 22; when the ray source 1 is in the storage position, the ray source 1 is aligned with the shielding layer.

[0071] In the embodiments of the present application, the first collimating structure 2 comprises a mounting through hole coaxially arranged with the first collimating structure 2. The movable rod 8 extends into the first shielding cavity 21 through the mounting through hole and is connected with the ray source 1. In this way, the movable rod 8 can serve as a moving carrier of the ray source 1 to drive the ray source 1 to adjust the position in the first shielding cavity 21.

[0072] In the embodiments of the present application, the ray source 1 moves along the axial direction of the first collimating structure 2 in the first shielding cavity 21. When the ray source 1 is in the working position, the ray source 1 is aligned with the first through hole 22 on the first collimating structure 2. It can be understood that, at this time, the ray beam emitted by the ray source 1 can be emitted from the first through hole 22 to form the required first beam, and the scatter imaging device can perform scanning imaging work. When the scatter imaging device is temporarily or long-term not needed to work (for example, during the gap between imaging processes or during maintenance), the ray source 1 can be moved to the storage position by the movable rod 8. When in the storage position, the ray source 1 is aligned with the shielding layer, so that the shielding layer can effectively block the ray beam to prevent the ray from leaking to the environment when the ray source 1 is not working, which helps to protect the operating personnel and other personnel from unnecessary radiation injury.

[0073] In the embodiments of the present application, the movable rod 8 can also be connected with the controller, so that the movable rod 8 can be flexibly controlled by the controller, reducing the manual operation and improving the safety.

[0074] With reference to Figure 1 , Figure 2 ,Figure 3 and Figure 4 In some possible embodiments of the present application, the first collimating structure 2 is rotatably arranged on the support 4, and the first collimating structure 2 is rotated relative to the support 4 to adjust the angle of the first through hole 22 relative to the support 4.

[0075] In the embodiments of the present application, the first collimating structure 2 can be connected to the support 4 through bearings, rotating shafts or other structures, so that the first collimating structure 2 can rotate on the support 4. By rotating the first collimating structure 2, the angle of the first through hole 22 relative to the support 4 can be adjusted, so as to change the irradiation direction of the ray beam.

[0076] Referring to Figure 7 and Figure 8 , Figure 7 The partial hidden structure diagram of the scatter imaging device is shown, the perspective view is a top view, and the internal structure of the scatter imaging device is displayed. Figure 7 Four parts are hollowed out in the diagram to facilitate observation of the internal structure of the scatter imaging device. In fact, the cover 42 is a whole structure and does not have hollow parts. Similarly, Figure 8 The partial hidden structure diagram of the scatter imaging device is shown, the perspective view is a bottom view, and the internal structure of the scatter imaging device is displayed. Figure 8 Four parts are hollowed out in the diagram to facilitate observation of the internal structure of the scatter imaging device. In fact, the lower cover 43 is a whole structure and does not have hollow parts. The adjustment of the angle of the first collimating structure 2 relative to the support 4 can be achieved in a manual or automatic manner, depending on the complexity and accuracy requirements of the application. For example, the support 4 further includes an upper cover 42 and a lower cover 43. The upper cover 42 is provided with an adjusting opening 421 near the area of the axis of the first collimating structure 2. When it is necessary to rotate and adjust the first collimating structure 2, the operator can manually rotate and adjust the first collimating structure 2 through the adjusting opening 421.

[0077] Referring to Figure 1 and Figure 2 In some possible embodiments of the present application, the support 4 includes a limiting guide 41, which is arranged around the axis of the second collimating structure 3 and is connected to the second collimating structure 3. The limiting guide 41 is used to limit the second collimating structure 3, and / or the second collimating structure 3 can rotate along the limiting guide 41.

[0078] In the embodiments of the present application, the limiting and guiding part 41 is used for limiting the second collimating structure 3 in the radial direction of the second collimating structure 3, and simultaneously providing guidance for the rotation of the second collimating structure 3. The limiting and guiding structure can be a sliding guide rail, a rotating bearing or the like. In the embodiments of the present application, the limiting and guiding structure is a groove provided on the support 4, the shape of the groove is circular, the portions of the two ends of the second collimating structure 3 connected with the support 4 are provided with protrusions, the protrusions are matched with the groove, the protrusions are clamped into the groove, and the second collimating structure 3 and the support 4 can be connected.

[0079] In the embodiments of the present application, the limiting and guiding part 41 can also be arranged in the region of the support 4 connected with the first collimating structure 2, which is used for limiting the first collimating structure 2, and / or the first collimating structure 2 can rotate along the limiting and guiding part 41.

[0080] In the embodiments of the present application, the support 4 further comprises a limiting part 45, which is used for limiting the displacement of the first collimating structure 2 and the second collimating structure 3 in the radial direction of the first collimating structure 2. The form of the limiting part 45 is not limited in the present application. For example, the limiting part 45 is arranged between the outer circumferential side of the first collimating structure 2 and the inner circumferential side of the second collimating structure 3, which is used for further limiting the first collimating structure 2 and the second collimating structure 3 in the radial direction, thereby improving the stability of the spacing between the first collimating structure 2 and the second collimating structure 3, and improving the imaging quality of the scatter imaging device.

[0081] In some possible embodiments of the present application, the first through hole 22 is arranged on the circumferential side of the first collimating structure 2, and the extension direction of the first through hole 22 is parallel to the axial direction of the first collimating structure 2; the second through hole 32 is arranged on the circumferential side of the second collimating structure 3, and the extension direction of the second through hole 32 has an included angle with the extension direction of the first through hole 22.

[0082] In the embodiments of the present application, the structure shown on the left side of FIG. 2 is the structure in the first collimating structure 2, and the structure shown on the right side of FIG. 2 is the structure in the second collimating structure 3 (that is, the expanded view of the first collimating structure 2). The two dotted lines at a certain angle from the ray source 1 are the opening angle of the ray source 1, the opening angle intersects with the outer surface of the first collimating structure 2 at a point, and two parallel dotted lines are drawn from the point, and the spacing between the two parallel dotted lines corresponds to the extension length of the first through hole 22. Similarly, the structure shown on the left side of FIG. 3 is the structure in the first collimating structure 2, and the structure shown on the right side of FIG. 3 is the structure in the second collimating structure 3. Figure 5 Figure 6 Figure 5 Figure 2 Figure 3 Figure 6 Figure 2 Figure 4 ​​​​​​​The structure in the figure (i.e. the expanded view of the second collimating structure 3), two dotted lines at an angle from the ray source 1 are the opening angle of the ray source 1, the opening angle intersects with the outer surface of the second collimating structure 3 at two points, and two parallel dotted lines are drawn from the points, the distance between the two parallel dotted lines corresponds to the extension length of the second through hole 32. The length of the first through hole 22 extending along the axis of the first collimating structure 2, and the position and height of the first through hole 22 on the first collimating structure 2 are determined by the opening angle of the rays emitted by the ray source 1, and the width of the first through hole 22 is usually not more than 2 millimeters (mm).

[0083] In the embodiments of the present application, the extension direction of the second through hole 32 and the extension direction of the first through hole 22 have an angle, and the size of the angle is determined by the requirements of the scatter imaging device scanning. The length of the extension of the second through hole 32, and the position and height of the second through hole 32 on the second collimating structure 3 are determined by the opening angle of the rays emitted by the ray source 1, and the width of the second through hole 32 is usually not more than 2 millimeters (mm).

[0084] In addition, theoretically, the vertical resolution is mainly determined by the density of the detector, but in practice, the angle of the first through hole 22 and the second through hole 32 of the first collimating structure 2 and the second collimating structure 3 also determines the spot size and shape of the irradiation point, in addition, the rotation speed of the second collimating structure 3 also affects the acquisition time of the electronic signal and is reflected in the statistical fluctuation of the signal, therefore, the second through hole 32 should be comprehensively analyzed according to the design index of the system.

[0085] In some possible embodiments of the present application, the second through hole 32 is a plurality of second through holes 32, and the plurality of second through holes 32 are uniformly distributed along the circumference of the second collimating structure 3.

[0086] In the embodiments of the present application, the specific number of the second through hole 32 can be adjusted according to the setting requirements, and in the case of the same number of rotations of the second collimating structure 3, the plurality of second through holes 32 increases the number of second beams, thereby improving the imaging efficiency of the scatter imaging device.

[0087] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A scattering imaging device, characterized in that, include: A radiation source, used to emit a beam of radiation; The first collimation structure includes a first shielding cavity and a first through hole. The radiation source is disposed in the first shielding cavity, and the first through hole is used to limit the shape of the radiation beam to form a first beam. The second collimation structure includes a second shielding cavity and a second through hole. The first collimation structure is disposed in the second shielding cavity, and the second through hole is used to adjust the shape of the first beam to form a second beam. Both the first collimation structure and the second collimation structure are provided with a shielding layer to shield the ray beam that does not pass through the first through hole in the first shielding cavity, and to shield the first ray beam that does not pass through the second through hole in the second shielding cavity. The bracket includes a first collimating structure rotatably mounted on the bracket for adjusting the angle of the first through hole relative to the bracket; and a second collimating structure rotatably mounted on the bracket, which can rotate relative to the first collimating structure to make a portion of the second through hole overlap with the first through hole. A movable rod, which can movably pass through the first collimation structure and connect to the radiation source; the movable rod can drive the radiation source to move relative to the first shielding cavity to a storage position and a working position; When the radiation source is in the working position, the radiation source is aligned with the first through hole; when the radiation source is in the storage position, the radiation source is aligned with the shielding layer. The bracket includes a limiting guide member, which is arranged around the axis of the second collimating structure, and the second collimating structure is connected to the limiting guide member; the limiting guide member is used to provide a limit to the second collimating structure, and / or the second collimating structure can rotate along the limiting guide member.

2. The scattering imaging device according to claim 1, characterized in that, It also includes a driving element connected to the second collimating structure to drive the second collimating structure to rotate relative to the first collimating structure.

3. The scattering imaging device according to claim 2, characterized in that, Also includes: The identification structure is located on the second collimation structure; A detector configured to identify the identification structure in order to obtain rotation parameters of the second collimating structure relative to the first collimating structure; The controller is configured to control the ray source and the drive unit based on the rotation parameters.

4. The scattering imaging device according to any one of claims 1 to 3, characterized in that, The first through hole is disposed on the periphery of the first collimation structure, and the extension direction of the first through hole is parallel to the axial direction of the first collimation structure; the second through hole is disposed on the periphery of the second collimation structure, and there is an angle between the extension direction of the second through hole and the extension direction of the first through hole.

5. The scattering imaging device according to claim 4, characterized in that, There are multiple second through holes, which are evenly distributed along the circumference of the second collimation structure.

6. A scattering imaging control system, characterized in that, include: The scattering imaging apparatus according to any one of claims 1 to 5; An information acquisition device is used to acquire the scattered beam formed by the second beam on the object to be detected.

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