Radiation scanning detection equipment and control method thereof

Abstract

The invention provides radiation scanning detection equipment and a control method thereof, and is applied to the field of radiation detection, and the equipment comprises a housing which is provided with a containing cavity; the object carrying platform is rotatably arranged in the accommodating cavity, and the object to be measured is suitable for being placed on the object carrying platform; the ray source is configured to emit rays for radiation scanning detection, and the ray source is arranged in the accommodating cavity; the detector is configured to detect rays and is arranged in the containing cavity, in the first direction, the ray source and the detector are located on the two opposite sides in the containing cavity, and an object to be detected on the object carrying platform is located in a scanning area between the ray source and the detector and is scanned by the ray source; the control assembly is electrically connected with the radiation source, the detector and the carrying platform and used for controlling the radiation source and the detector, generating a radiation scanning image based on detection data output by the detector and controlling the carrying platform to stop rotating or rotate at a set speed under the condition that the radiation scanning image meets a set condition.

Description

Technical Field

[0001] This disclosure relates to the field of radiation detection technology, and more specifically, to a radiation scanning detection device and its control method. Background Technology

[0002] Currently, security inspection technology mainly relies on traditional X-ray radiation scanning detection equipment. Traditional X-ray radiation scanning detection equipment generates images by having rays penetrate objects, and can identify large dangerous items, such as controlled knives, firearms, ammunition, and flammable and explosive items. However, its spatial resolution is usually on the order of millimeters, making it difficult to detect small or thin explosives.

[0003] Traditional X-ray radiation scanning equipment is unsuitable for detecting the authenticity of electronic products such as mobile phones, pagers, walkie-talkies, tablets, and laptops. Therefore, in the field of electronic product security inspection, there are no effective means to detect modifications to electronic products, such as the addition of small chips or changes to circuitry, and / or the storage of small amounts of explosives within them. Furthermore, the detection methods and algorithms used in traditional X-ray radiation scanning equipment are complex, requiring high-resolution, clearly interpretable radiation images to determine the authenticity and hazard of the product being inspected. This necessitates high radiation energy and doses, which increase detection costs and the difficulty of protective measures.

[0004] The radiation scanning detection device disclosed herein can be used to detect objects to be tested (such as mobile phones, pagers, walkie-talkies, tablet computers, laptops and other electronic products). Due to the structure of the object to be tested (the length, width and / or height of a certain part of the object to be tested is large), it may be possible that during the rotation scanning process, when the object is rotated to the part being scanned, the radiation cannot penetrate the part within a certain angle range, which will invalidate the scanning results of that part.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions disclosed herein, and for facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this disclosure. Summary of the Invention

[0006] One aspect of this disclosure provides a radiation scanning detection device, comprising: a housing having a receiving cavity; a platform rotatably disposed in the receiving cavity, wherein an object to be tested is adapted to be placed on the platform; a radiation source configured to emit radiation for radiation scanning detection, the radiation source being disposed in the receiving cavity; a detector configured to detect the radiation, disposed in the receiving cavity, wherein, in a first direction, the radiation source and the detector are located on opposite sides within the receiving cavity, and the object to be tested on the platform is located in a scanning area between the radiation source and the detector, receiving scanning data from the radiation source; and a control component electrically connected to the radiation source, the detector, and the platform, for controlling the radiation source to emit radiation for radiation scanning detection, controlling the detector to receive the radiation and receiving detection data output by the detector, generating a radiation scanning image based on the detection data, and controlling the platform to stop rotating or rotate at a set speed when the radiation scanning image meets set conditions.

[0007] In some examples, the loading platform includes: a drive assembly; and a turntable connected to the drive assembly, the turntable being rotatably disposed within the receiving cavity.

[0008] In some examples, the drive assembly includes a drive shaft and a direct drive motor connected to the drive shaft, which is connected to the turntable.

[0009] In some examples, the loading platform further includes: an incremental encoder disposed on the drive shaft; a proximity switch including a marker and a detection element, the marker being connected to the turntable and the detection element being connected to the housing; wherein the control component is electrically connected to the detection element, the incremental encoder, and the direct drive motor, the control component receiving a first signal from the detection element and a second signal from the incremental encoder, and controlling the direct drive motor to rotate a first set angle according to the first signal and the second signal.

[0010] In some examples, the radiation scanning detection device further includes a clamping mechanism connected to the loading platform for fixing the object to be tested.

[0011] In some examples, the clamping mechanism includes: a gripper connected to the loading platform, wherein the object to be tested is adapted to be clamped in the gripper; or a backing plate connected to the loading platform, wherein the object to be tested is adapted to be rested against the backing plate; or a support connected to the loading platform, having a groove adapted to the clamping position of the object to be tested, wherein the clamping position of the object to be tested is adapted to be placed in the groove; or a base formed in a barrel shape, wherein a closed end of the base opposite to the open end is connected to the loading platform; and a flexible filler filled in the base, having a clamping slot, wherein the object to be tested is adapted to be clamped in the clamping slot.

[0012] In some examples, the receiving cavity has an opening, and the opening is provided with a switch door to open and close the opening. The radiation scanning detection device further includes a safety interlock, which includes a first locking part and a second locking part adapted to the first locking part. The first locking part is disposed in the housing, and the second locking part is disposed in the switch door. The safety interlock is electrically connected to the control component.

[0013] In some examples, the radiation scanning detection device further includes an electromagnetic lock for locking the switch door when the radiation source emits radiation for radiation scanning detection. The electromagnetic lock includes a first electromagnetic locking part and a second electromagnetic locking part adapted to the first electromagnetic locking part. The first electromagnetic locking part is disposed in the housing, and the second electromagnetic locking part is disposed in the switch door. The electromagnetic lock is electrically connected to the control component.

[0014] Another aspect of this disclosure provides a control method for a radiation scanning detection device, the radiation scanning detection device including a platform, a radiation source, a detector, and a control component, the control component executing the control method, the platform being rotatably disposed in a receiving cavity of the radiation scanning detection device, an object to be tested being adapted to be placed on the platform, the radiation source and the detector being located on opposite sides within the receiving cavity, and the object to be tested on the platform being located in a scanning area between the radiation source and the detector, receiving scanning from the radiation source.

[0015] The control method includes: controlling the rotation of the platform; controlling the X-ray source to emit X-rays for radiation scanning detection; receiving the detection data output by the detector and generating a radiation scanning image based on the detection data; and controlling the platform to stop rotating or rotate at a set speed when the radiation scanning image meets set conditions.

[0016] In some examples, the platform includes a drive assembly, a turntable, an incremental encoder, and a proximity switch. The drive assembly includes a direct drive motor connected to a drive shaft. The proximity switch includes a marker connected to the turntable and a detection element connected to the housing of the radiation scanning detection device. The step of controlling the rotation of the platform includes: in response to the initial operation of the radiation scanning detection device after a power outage, controlling the direct drive motor to drive the turntable to rotate via the drive shaft; when the detection element detects the marker, marking the position of the direct drive motor as the origin; and in response to the radiation source emitting radiation for radiation scanning detection, or in response to triggering a rotation button on the platform, controlling the direct drive motor to drive the turntable to rotate by a first predetermined angle based on the origin and the signal from the incremental encoder.

[0017] In some examples, the radiation scanning detection device further includes a housing and a safety interlock. The housing has a receiving cavity with an opening and a switch door at the opening. The safety interlock includes a first locking part located on the housing and a second locking part located on the switch door. The control method further includes: responding to the locking of the first locking part and the second locking part, and triggering a ray emission button for radiation scanning detection on the radiation scanning detection device, thereby controlling the ray source to emit rays for radiation scanning detection.

[0018] In some examples, the control method further includes: matching the test sample with radiometric scan images of multiple standard objects in a standard library, and using the radiometric scan image of the standard sample with the highest matching degree as the standard sample, wherein the standard library is pre-constructed and stores radiometric scan images of multiple standard objects in advance; registering the test sample with the standard sample; performing subtraction calculation on the registered test sample and the standard sample to obtain a mask of the foreign object region; and identifying foreign objects in the test object based on the mask of the foreign object region.

[0019] In some examples, the control method further includes: when the radiation scan image meets the set conditions, controlling the direct drive motor to stop rotating or to rotate at the set speed and a second set angle.

[0020] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0021] To gain a more complete understanding of this disclosure and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 This is a schematic diagram of the structure of a radiation scanning detection device according to some embodiments of the present disclosure;

[0023] Figure 2 This is a structural block diagram of a radiation scanning detection device according to some embodiments of the present disclosure;

[0024] Figure 3 This is a schematic diagram of a scanning area formed between a radiation source and a detector according to some embodiments of the present disclosure;

[0025] Figure 4 This is a schematic diagram of the structure of a cargo platform according to some embodiments of the present disclosure;

[0026] Figure 5 This is a schematic diagram of the structure of a backing plate according to some embodiments of the present disclosure;

[0027] Figure 6 These are schematic diagrams of the structure of a bracket according to some embodiments of this disclosure;

[0028] Figure 7 This is a schematic diagram of the structure of the base and flexible filler according to some embodiments of this disclosure;

[0029] Figure 8 This is a schematic diagram of a structure for concealing explosives in a mobile phone according to some embodiments of this disclosure;

[0030] Figure 9 This is a schematic diagram of a structure for concealing explosives in a laptop computer according to some embodiments of the present disclosure;

[0031] Figure 10 This is a flowchart of a control method according to some embodiments of the present disclosure;

[0032] Figure 11 This is a flowchart of the steps for controlling the rotation of a cargo platform according to some embodiments of this disclosure;

[0033] Figure 12 This is a flowchart of a control method according to other embodiments of the present disclosure.

[0034] Figure label:

[0035] Radiation scanning detection equipment 100,

[0036] Housing 1, receiving cavity 11, opening and closing door 12,

[0037] The components include: a loading platform 2, a drive assembly 21, a direct drive motor 211, a drive shaft 212, a turntable 22, an incremental encoder 23, a proximity switch 24, a marker 241, and a detection element 242.

[0038] Clamping mechanism 3, base 31, flexible filler 32, clamping groove 321, backing plate 33, support 34, groove 341.

[0039] Safety interlock 4, first locking part 41, second locking part 42.

[0040] Electromagnetic lock 5, first electromagnetic locking part 51, second electromagnetic locking part 52.

[0041] Sliding component 6, slide rail 61, slide rail 62

[0042] X-ray source 7,

[0043] Detector 8, Scanning area S

[0044] Scrolling component 9,

[0045] Control component 10,

[0046] The objects to be tested are: 200 (mobile phone), 201 (laptop), 202 (laptop), and 300 (explosive). Detailed Implementation

[0047] The embodiments of this disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure. Additionally, the various embodiments and technical features provided below can be combined with each other in any manner.

[0048] In this document, unless otherwise specified, the term “connection” refers to a physical contact relationship, which includes fixed connections or movable links, as well as direct or indirect connection methods, such as, but not limited to, the following: (1) fixed connections with direct contact (e.g., fixed connections by welding, riveting, threading, etc.); (2) indirect connections through intermediate parts (e.g., indirect connections through components such as adapter plates, adapters, flanges, etc.); (3) movable connections that allow relative displacement (e.g., connections such as hinges, slide rails, etc.).

[0049] In this document, unless otherwise specified, the term "electrical connection" refers to an electrical coupling relationship that enables the transmission of current, voltage or electrical signals through a conductor medium, including, but not limited to, the following: (1) a conductive connection through physical contact (e.g., a conductive connection through crimped wires, PCB pads, etc.); (2) an indirect connection through a conductor (e.g., a conductive connection through copper foil traces, shielded cables, etc.); and (3) a logic signal path (e.g., a conductive connection through microstrip lines, coaxial cables, etc.).

[0050] The following is for reference. Figures 1-12This invention describes a radiation scanning detection device 100 and its control method according to embodiments of the present disclosure.

[0051] Understandably, current security inspection technology primarily relies on traditional X-ray radiation scanning equipment. Traditional X-ray radiation scanning equipment generates images by having rays penetrate objects, enabling the identification of large hazardous items such as controlled knives, firearms, ammunition, and flammable and explosive materials. However, its spatial resolution is typically on the order of millimeters, making it difficult to detect small or thin explosive devices. Traditional X-ray radiation scanning equipment is unsuitable for detecting the authenticity of electronic products such as mobile phones, pagers, walkie-talkies, tablets, and laptops. The radiation scanning equipment disclosed herein can be used to inspect objects (such as mobile phones, pagers, walkie-talkies, tablets, and laptops). Due to the structure of the object itself (the length, width, and / or height of a certain part of the object may be large; for ease of description, the length, width, and / or height of a certain part will be referred to as the thickness of the scanned portion below), during the rotational scanning process, when the device is rotated to the scanned portion, the rays may not be able to penetrate that portion within certain angle ranges, rendering the scan results for that portion invalid.

[0052] like Figures 1-3 As shown, the radiation scanning detection device 100 according to an embodiment of the present disclosure includes a housing 1, a platform 2, a radiation source 7, a detector 8, and a control component 10.

[0053] Specifically, combined Figures 1-3 The housing 1 has a receiving cavity 11. A platform 2 is rotatably disposed within the receiving cavity 11, and the object to be tested 200 is adapted to be placed on the platform 2. A radiation source 7 is configured to emit radiation for radiation scanning detection, and is disposed within the receiving cavity 11. A detector 8 is configured to detect the radiation and is disposed within the receiving cavity 11. In a first direction (e.g., any direction in the horizontal direction, such as the X or Y direction), the radiation source 7 and detector 8 are located on opposite sides within the receiving cavity 11. The object to be tested 200 on the platform 2 is located in the scanning area S between the radiation source 7 and detector 8, and is scanned by the radiation source 7. A control component 10 is electrically connected to the radiation source 7, detector 8, and platform 2, and is used to control the radiation source 7 to emit radiation for radiation scanning detection, control the detector 8 to receive radiation and receive the detection data output by the detector 8, generate a radiation scanning image based on the detection data, and control the platform 2 to stop rotating or rotate at a set speed when the radiation scanning image meets set conditions.

[0054] It should be noted that when the platform 2 rotates the object under test 200, it can rotate at a normal speed. At this normal speed, if the scanned portion of the object under test 200 satisfies the condition that the radiation scan image generated based on the detection data output by the detector 8 is clear, that is, at the normal speed, scanning this part of the structure of the object under test 200 can yield effective scan results. The normal speed can be designed according to actual needs, and no restrictions are placed on the normal speed here.

[0055] However, if the thickness of the scanned portion of the object under test 200 is relatively large, this part of the structure of the object under test 200 will not satisfy the requirement that the radiation scan image generated based on the detection data output by the detector 8 is clear. Based on this, the radiation scan image meets the set condition, which can be understood as the radiation scan image not meeting the conditions for image analysis. The reason is that the thickness of the scanned portion of the object under test 200 exceeds the image clarity display threshold of the detector 8, thus causing the radiation scan image generated based on the detection data output by the detector 8 to be unclear, thereby failing to meet the conditions for image analysis.

[0056] In this context, it is assumed that the rotation speed when the thickness of the scanned portion of the object under test 200 does not exceed the image clarity display threshold of the detector is considered the normal speed. The set speed can be understood as being higher than the normal speed. It is understandable that if the same scanning mode (such as the same scanning speed, beam output, etc.) is used for the effectively scanned portion of the object under test 200, it will lead to invalid detection within the angle range that the radiation cannot penetrate, thus reducing detection efficiency. Therefore, this disclosure, when the radiation scan image meets the set conditions, controls the platform 2 to stop rotating or rotate at a set speed (stop scanning or pass through at high speed when the thickness of the scanned portion of the object under test 200 exceeds the image clarity display threshold of the detector) to reduce invalid detection, save resources, and improve detection efficiency.

[0057] According to the radiation scanning detection device 100 of this disclosure, the rotation of the platform 2 can rotate the object under test 200 within the scanning area S, allowing the detector 8 to obtain the rays passing through the object under test 200 when it rotates about the second direction Z, thereby realizing the circular scanning mode of the radiation scanning detection device 100. In the circular scanning mode, a corresponding radiation scanning image can be obtained, satisfying the corresponding requirements of the radiation scanning image, adapting to the corresponding solution target of the radiation scanning image, facilitating accurate analysis of the radiation scanning image, and thus improving the accuracy of the detection result of the object under test 200. The higher-precision radiation scanning detection device 100 can easily detect radiation hidden in pagers, walkie-talkies, mobile phones 201 (such as...). Figure 8 As shown), tablet or laptop 202 (e.g.) Figure 9The detection of small amounts of explosives 300 in electronic products (as shown) compensates for the shortcomings of current security inspection technologies in dealing with new and concealed threats. Furthermore, the radiation scanning detection device 100 of this disclosure can acquire radiation scanning images in circular scanning mode with fewer components (object platform 2, radiation source 7, and detector 8) within the housing 1, resulting in a smaller size and footprint. Simultaneously, when the radiation scanning image meets set conditions, this disclosure controls the object platform 2 to stop rotating or rotate at a set speed (scanning stops or speeds up when the thickness of the scanned portion of the object 200 exceeds the detector's image clarity threshold), reducing invalid detections, saving resources, and improving detection efficiency.

[0058] In some examples, the radiation scanning detection device 100 of this disclosure can be a desktop device. In some examples, the radiation scanning detection device 100 of this disclosure can be a portable device. The smaller size of the radiation scanning detection device 100 has the advantages of diverse application scenarios and ease of handling.

[0059] According to some embodiments of this disclosure, such as Figure 4 As shown, the loading platform 2 may include a drive assembly 21 and a turntable 22. The turntable 22 is connected to the drive assembly 21 and is rotatably disposed in the receiving cavity 11. The drive assembly 21 is a power mechanism used to drive the turntable 22 to rotate. Through the cooperation of the drive assembly 21 and the turntable 22, the loading platform 2 can easily drive the object 200 to rotate.

[0060] In some embodiments of this disclosure, such as Figure 4 As shown, the drive assembly 21 may include a drive shaft 212 and a direct drive motor 211. The direct drive motor 211 is connected to the drive shaft 212, and the drive shaft 212 is connected to the turntable 22. The drive shaft 212 and the direct drive motor 211 facilitate the drive assembly 21 to drive the turntable 22 to rotate.

[0061] In some embodiments of this disclosure, such as Figure 4 As shown, the loading platform 2 may also include an incremental encoder 23 and a proximity switch 24. The incremental encoder 23 is located on the drive shaft 212. The proximity switch 24 includes a marker 241 and a detection element 242. The marker 241 is connected to the turntable 22, and the detection element 242 is connected to the housing 1. The control component 10 is electrically connected to the detection element 242, the incremental encoder 23, and the direct drive motor 211. The control component 10 receives a first signal from the detection element 242 and a second signal from the incremental encoder 23, and controls the direct drive motor 211 to rotate a first set angle according to the first and second signals.

[0062] It is understandable that the proximity switch 24 can be used to mark the origin of the direct drive motor 211. In some examples, when the radiation scanning detection device 100 is first put into operation after being powered off, the control component 10 can control the direct drive motor 211 to drive the turntable 22 to rotate via the drive shaft 212. When the detector 242 detects the marker 241, it sends a first signal to the control component 10. The control component 10 marks the position where the detector 242 detects the marker 241 as the origin of the direct drive motor 211. The second signal output by the incremental encoder 23 can be angular displacement and rotational speed. The rotation angle of the direct drive motor 211 can be obtained based on the origin, angular displacement, and rotational speed, which facilitates the control of the direct drive motor 211 to rotate at a preset first set angle. The first set angle can be understood as the rotation angle mentioned above, such as 30°, 40°, 45°, 60°, 90°, 180°, or 360°, etc.

[0063] The incremental encoder 23 and proximity switch 24 facilitate the drive assembly 21 to drive the turntable 22 to rotate a preset first angle, thereby facilitating the acquisition of a radiographic scan image that meets expectations.

[0064] like Figure 1 As shown, the radiation scanning detection device 100 according to an embodiment of this disclosure may further include a clamping mechanism 3, which is connected to the loading platform 2 and used to fix the object to be tested 200. Thus, the clamping mechanism 3 can stably fix the object to be tested 200 on the loading platform 2, resulting in high stability of radiation detection of the object to be tested 200.

[0065] In some specific examples, the clamping mechanism 3 may include grippers connected to the loading platform 2, and the object to be measured 200 is adapted to be clamped in the grippers. The grippers facilitate the clamping mechanism 3 in stably fixing the object to be measured 200 to the loading platform 2.

[0066] In some examples, the material density of the material used to manufacture the grippers can be less than or equal to a set threshold; for example, the material used to manufacture the grippers can be polypropylene and / or polyethylene, etc.

[0067] In some specific examples, such as Figure 5 As shown, the clamping mechanism 3 may include a backing plate 33, which is connected to the loading platform 2. The object to be measured 200 is adapted to rest against the backing plate 33. The backing plate 33 facilitates the clamping mechanism 3 in stably fixing the object to be measured 200 to the loading platform 2.

[0068] In some examples, the material density of the material used to manufacture the backrest 33 may be less than or equal to a set threshold. For example, the material used to manufacture the backrest 33 may be foam plastic, polypropylene, and / or polyethylene, etc.

[0069] In some specific examples, such as Figure 6 As shown, the clamping mechanism 3 may include a support 34, which is connected to the loading platform 2 and has a groove 341 adapted to the clamping position of the object to be measured 200. The clamping position of the object to be measured 200 is suitable for placement in the groove 341. The support 34 facilitates the clamping mechanism 3 in stably fixing the object to be measured 200 to the loading platform 2.

[0070] In some examples, the material density of the material used to manufacture the support 34 may be less than or equal to a set threshold. For example, the material used to manufacture the support 34 may be foam plastic, polypropylene, and / or polyethylene, etc.

[0071] In some specific examples, such as Figure 7 As shown, the clamping mechanism 3 may include a base 31 and a flexible filler 32. The base 31 is formed in a barrel shape, and the closed end of the base 31 opposite to the open end is connected to the loading platform 2. The flexible filler 32 is filled inside the base 31 and has a clamping groove 321, in which the object to be measured 200 is adapted to be clamped. It can be understood that the barrel-shaped base 31, as the main structure of the clamping mechanism 3, provides stable support and fixation, facilitating the fixation of the flexible filler 32. The embedded flexible filler 32 can play a buffering and adapting role. Since the flexible filler 32 has a certain elasticity, it can deform appropriately according to the size and shape of the object to be measured 200 when the object to be measured 200 is placed into the clamping mechanism 3, thereby closely conforming to the surface of the object to be measured 200. This can ensure the stability of the object to be measured 200 in the clamping mechanism 3 and also avoid imaging interference caused by the gap between the clamping mechanism 3 and the object to be measured 200. The flexible filler 32 has a soft texture and is easily deformable, which allows the clamping mechanism 3 to adapt to objects 200 of different sizes and shapes. That is, no matter whether the object 200 is large or small, round or square, the flexible filler 32 can adapt through its elastic deformation and maintain good contact and fixation effect, thereby significantly improving the versatility and flexibility of the clamping mechanism 3.

[0072] In some examples, the material density of the material used to manufacture the base 31 may be less than or equal to a first set threshold. For example, the material used to manufacture the base 31 may be plastic, such as polypropylene and / or polyethylene, etc. The material density of the material used to manufacture the flexible filler 32 may be less than or equal to a second set threshold. For example, the material used to manufacture the flexible filler 32 may be sponge, etc.

[0073] According to some embodiments of this disclosure, such as Figure 1As shown, the receiving cavity 11 has an open opening, and a switch door 12 is provided at the open opening to open and close the open opening. The radiation scanning detection device 100 may also include a safety interlock 4, which includes a first locking part 41 and a second locking part 42 adapted to the first locking part 41. The first locking part 41 is provided on the housing 1, and the second locking part 42 is provided on the switch door 12. The safety interlock 4 is electrically connected to the control component 10.

[0074] It is understandable that the first locking part 41 and the second locking part 42 can have two working states: an engaged state and a disengaged state. When the first locking part 41 and the second locking part 42 are engaged, they are locked, thus preventing the door 12 from opening. When the first locking part 41 and the second locking part 42 are disengaged, they are open, allowing the door 12 to open smoothly. When the first locking part 41 and the second locking part 42 are engaged, the control component 10 can control the radiation source 7 to emit radiation for radiation scanning detection. When the first locking part 41 and the second locking part 42 are disengaged, the control component 10 controls the radiation source 7 to stop emitting radiation for radiation scanning detection.

[0075] Safety interlock 4 ensures that the radiation source 7 can only emit radiation for radiation scanning detection when the door 12 is locked, thus ensuring the safety of radiation use.

[0076] In some embodiments of this disclosure, such as Figure 1 As shown, the radiation scanning detection device 100 may further include an electromagnetic lock 5. The electromagnetic lock 5 is used to lock the switch door 12 when the radiation source 7 emits radiation for radiation scanning detection. The electromagnetic lock 5 includes a first electromagnetic locking part 51 and a second electromagnetic locking part 52 adapted to the first electromagnetic locking part 51. The first electromagnetic locking part 51 is disposed in the housing 1, and the second electromagnetic locking part 52 is disposed in the switch door 12. The electromagnetic lock 5 is electrically connected to the control component 10. When the radiation source 7 emits radiation for radiation scanning detection, the control component 10 controls the first electromagnetic locking part 51 and the second electromagnetic locking part 52 to lock. It can be understood that the electromagnetic lock 5 has a strong locking capability, and locking the switch door 12 when the radiation source 7 and the detector 8 start working makes the operation safer.

[0077] In some examples, the radiation scanning detection device 100 is equipped with both an electromagnetic lock 5 and a safety interlock 4, providing dual safety protection. Specifically, to ensure the safety of the operator, when the radiation source 7 starts operating, the control component 10 controls the electromagnetic lock 5 to lock the switch door 12. This prevents the operator from opening the switch door 12 even if they mistakenly operate it, thus avoiding direct radiation exposure. The radiation scanning detection device 100 also includes a safety interlock 4 on the switch door 12 as an additional safety measure. If someone attempts to forcibly open the switch door 12, the safety interlock 4 will be triggered immediately, and the control component 10 will stop the radiation source 7. Thus, even if the electromagnetic lock 5 fails for some reason, the safety interlock 4 provides a second layer of protection, ensuring the safety of the operator.

[0078] According to some embodiments of this disclosure, in conjunction with Figure 1 The radiation scanning detection device 100 may also include a sliding assembly 6, which includes a slide rail 62 and a slide path 61. One of the slide rail 61 and the slide path 62 is located on the door 12, and the other is located on the housing 1. The slide rail 61 and the slide path 62 are slidably engaged so that the door 12 is slidably located on the housing 1. The slide rail 61 and the slide path 62 facilitate the slidable location of the door 12 on the housing 1, thereby facilitating the opening and closing of the door 12.

[0079] In some embodiments of this disclosure, such as Figure 1 As shown, the radiation scanning detection device 100 may further include a rolling assembly 9, which is located at the bottom of the housing 1. For example, the rolling assembly 9 may be a roller. The rolling assembly 9 facilitates the movement of the radiation scanning detection device 100, thereby enabling the radiation scanning detection device 100 to be used in multiple scenarios and improving the ease of use of the radiation scanning detection device 100.

[0080] According to an embodiment of the present disclosure, a control method is used in a radiation scanning detection device. The radiation scanning detection device includes a platform, a radiation source, a detector, and a control component. The control component executes the control method. The platform is rotatably disposed in the receiving cavity of the radiation scanning detection device. The object to be tested is adapted to be placed on the platform. The radiation source and the detector are located on opposite sides within the receiving cavity. The object to be tested on the platform is located in the scanning area between the radiation source and the detector and is scanned by the radiation source.

[0081] like Figure 10 As shown, the control method may include steps S110 to S130.

[0082] In step S110, the loading platform is controlled to rotate.

[0083] In step S120, the radiation source is controlled to emit radiation for radiation scanning detection.

[0084] In step S130, the detection data output by the detector is received, and a radiation scan image is generated based on the detection data. If the radiation scan image meets the set conditions, the platform is controlled to stop rotating or rotate at a set speed.

[0085] It is understood that the control method of this disclosure can control the platform, the X-ray source, and the detector through steps S110 to S130 respectively, so that the platform can rotate the object under test within the scanning area.

[0086] When the platform rotates the object under test, it can rotate at a normal speed. At this normal speed, if the scanned portion of the object meets the following condition: the radiation scan image generated based on the detector output data is clear, that is, at the normal speed, scanning this part of the object's structure can yield effective scan results. The normal speed can be designed according to actual needs; here, no restrictions are placed on the normal speed.

[0087] However, if the thickness of the scanned portion of the object under test is relatively large, that portion of the object's structure will not satisfy the requirement that the radiation scan image generated based on the detector's output data be clear. Therefore, the radiation scan image does not meet the set conditions. These conditions can be understood as the radiation scan image failing to meet the conditions for image analysis because the thickness of the scanned portion of the object exceeds the detector's image clarity threshold. This results in an unclear radiation scan image generated based on the detector's output data, thus failing to meet the conditions for image analysis.

[0088] In this invention, the rotation speed at which the thickness of the scanned portion of the object under test does not exceed the image clarity display threshold of the detector is considered the normal speed. The set speed can be understood as being higher than the normal speed. It is understandable that if the same scanning mode (such as the same scanning speed, beam output, etc.) is used for the effectively scanned portion of the object under test, it will lead to invalid detection within the angle range that the radiation cannot penetrate, thus reducing detection efficiency. Therefore, this disclosure, when the radiation scan image meets the set conditions, controls the platform to stop rotating or rotate at a set speed (stop scanning or pass through at high speed when the thickness of the scanned portion of the object under test exceeds the image clarity display threshold of the detector) to reduce invalid detection, save resources, and improve detection efficiency.

[0089] According to the control method of this disclosure, controlling the rotation of the carrier platform can drive the object under test to rotate within the scanning area, allowing the detector to obtain the rays passing through the object under test when it rotates about the second direction Z axis, thereby realizing the circular scanning mode of the radiation scanning detection device. In the circular scanning mode, corresponding radiation scanning images can be obtained, meeting the corresponding requirements for radiation scanning images, adapting to the corresponding solution targets of radiation scanning images, facilitating accurate analysis of radiation scanning images, and thus improving the accuracy of the detection results for the object under test. Higher precision radiation scanning detection devices can easily detect small amounts of explosives hidden in electronic products such as pagers, walkie-talkies, mobile phones, tablets, or laptops, compensating for the shortcomings of current security inspection technologies in dealing with new concealed threats. Simultaneously, the method of this disclosure, when the radiation scanning image meets set conditions, controls the carrier platform to stop rotating or rotate at a set speed (when the thickness of the scanned part of the object under test exceeds the image clarity display threshold of the detector, scanning stops or passes at high speed), which can reduce invalid detections, save resources, and improve detection efficiency.

[0090] In some embodiments, the circular scanning mode can perform a single circular scan or a reciprocating circular scan. Specifically, when the structure of the object under test is simple, and usable detection data can be obtained with a single circular scan, and a clear radiation scan image can be generated based on the detection data from a single circular scan, the single-scan scanning mode can be used to save resources. When the structure of the object under test is complex, and usable detection data cannot be obtained with a single circular scan, the reciprocating circular scanning mode can be used. The reciprocating circular scan can cover a larger scanning area, reduce detection blind spots, and obtain more usable detection data.

[0091] According to some embodiments of this disclosure, the platform may include a drive assembly, a turntable, an incremental encoder, and a proximity switch. The drive assembly may include a direct drive motor connected to a drive shaft. The proximity switch may include a marker connected to the turntable and a detection element connected to the housing of the radiation scanning detection equipment. Figure 11 The steps for controlling the rotation of the cargo platform shown may include sub-steps S111 and S112.

[0092] In sub-step S111, in response to the initial operation of the radiation scanning detection equipment after power failure, the direct drive motor is controlled to drive the turntable to rotate through the drive shaft. When the detection element detects the marker, the direct drive motor is marked as the origin at that position.

[0093] In sub-step S112, in response to the radiation source emitting radiation for radiation scanning detection, or in response to triggering the rotation button of the platform, the direct drive motor is controlled to drive the turntable to rotate by a first set angle based on the signals from the origin and the incremental encoder.

[0094] It should be noted that the incremental encoder outputs signals of angular displacement and rotational speed. Based on the origin, angular displacement, and rotational speed, the rotational angle of the direct drive motor can be obtained, thus facilitating control of the direct drive motor to rotate at a preset first angle. This first angle can be set according to actual needs, for example, it can be 30°, 40°, 45°, 60°, 90°, 180°, or 360°, etc.

[0095] Sub-step S111 facilitates the calibration of the origin, and sub-step S112 facilitates the control of the direct drive motor to drive the turntable to rotate by a first set angle. This allows the direct drive motor to drive the turntable to rotate the object under test by a pre-set angle, thereby facilitating the acquisition of a radiation scan image that meets expectations.

[0096] In some embodiments of this disclosure, the radiation scanning detection device may further include a housing and a safety interlock. The housing has a receiving cavity with an opening and a switch door at the opening. The safety interlock may include a first locking part disposed on the housing and a second locking part disposed on the switch door.

[0097] The control method may further include step S140. In step S140, in response to the locking of the first locking part and the second locking part, the radiation scanning detection device is triggered to emit a ray for radiation scanning detection, thereby controlling the ray source to emit rays for radiation scanning detection.

[0098] It is understandable that the first and second locking parts can have two working states: an engaged state and a disengaged state. When the first and second locking parts are engaged, they are locked, preventing the door from opening. When they are disengaged, they are open, allowing the door to open smoothly. When engaged, the control component controls the radiation source to emit radiation for radiation scanning detection; when disengaged, the control component stops the radiation source from emitting radiation for detection.

[0099] Step S140 facilitates ensuring that the X-ray source can only emit X-rays for radiation scanning detection when the door is locked by the safety interlock, thus guaranteeing the safety of X-ray use.

[0100] like Figure 12 As shown, the control method according to the embodiments of this disclosure may further include steps S210 to S240.

[0101] In step S210, the sample to be tested is matched with the radiation scan images of multiple standard objects in the standard library, and the radiation scan image of the standard sample with the highest matching degree is used as the standard sample. The standard library is pre-constructed and stores the radiation scan images of multiple standard objects in advance.

[0102] As some possible implementation methods, features of the sample to be tested can be extracted, including but not limited to contour features, texture features, and density distribution features. Features corresponding to the sample to be tested can be extracted from the radiometric scan images of multiple standard objects in a standard library. The similarity between the features of the sample to be tested and the radiometric scan image of each standard object is calculated, and the radiometric scan image of the standard object with the highest similarity to the sample to be tested is used as the standard sample.

[0103] In step S220, the sample to be tested is registered with the standard sample. Registering the sample to be tested with the standard sample can be understood as the process of aligning the sample to be tested with the standard sample in space (position, angle, size, etc.) so that the sample to be tested and the standard sample are as geometrically consistent as possible.

[0104] In step S230, the registered test sample and the standard sample are subjected to subtraction calculation to obtain a mask of the foreign object region. In some examples, pixel-level difference operations are performed between the registered test sample and the standard sample to obtain a binary image (mask), which consists of white pixels (value 1) and black pixels (value 0).

[0105] In step S240, foreign objects in the object under test are identified based on a mask of the foreign object region. Here, white pixels in the binary image can represent potential foreign object regions, and black pixels can represent background or indistinguishable regions. Therefore, based on the mask of the foreign object region, foreign objects in the object under test can be identified.

[0106] Steps S210 to S240 facilitate automated confirmation of the presence of foreign objects in the target object based on the acquired sample, resulting in high detection efficiency. Specifically, precise image registration and subtraction calculations effectively identify foreign objects in the target object, achieving high detection accuracy. Therefore, the control method disclosed herein can be widely applied in fields such as product quality inspection and safety inspection.

[0107] According to some embodiments of this disclosure, the control method may further include step S150.

[0108] In step S150, if the radiation scan image meets the set conditions, the direct drive motor is controlled to stop rotating or rotate at a set speed and a second set angle. Here, the set conditions can be understood as the radiation scan image not meeting the conditions for image analysis. The reason may be that the thickness of the scanned part of the object under test exceeds the image clarity display threshold of the detector, thus causing the radiation scan image generated based on the detector output data to be unclear, thereby failing to meet the conditions for image analysis.

[0109] In this context, assuming the thickness of the scanned portion of the object under test does not exceed the image clarity display threshold of the detector, the rotation speed is considered the normal speed. The set speed can be understood as being higher than the normal speed. Step S150 enables the scanning to stop or accelerate past the detector at a higher speed when the thickness of the scanned portion exceeds the image clarity display threshold. The angle of acceleration can be understood as a second set angle, such as 1°, 2°, 3°, 5°, or 10°, etc. The examples of the second set angle are merely illustrative and should not be construed as limiting the scope of this disclosure. This avoids wasting resources and obtaining useless images, thereby saving resources and improving detection efficiency.

[0110] Those skilled in the art will understand that the features described in the various embodiments of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

Claims

1. A radiation scanning detection device, characterized in that, include: A housing having a receiving cavity; A loading platform is rotatably disposed in the receiving cavity, and the object to be tested is adapted to be placed on the loading platform; A radiation source configured to emit radiation for radiation scanning detection, the radiation source being disposed in the receiving cavity; A detector configured to detect the radiation is disposed in the receiving cavity. In a first direction, the radiation source and the detector are located on opposite sides of the receiving cavity, and the object to be tested on the platform is located in the scanning area between the radiation source and the detector, and is scanned by the radiation source. as well as A control component, electrically connected to the radiation source, the detector, and the platform, is used to control the radiation source to emit radiation for radiation scanning detection, control the detector to receive the radiation and receive the detection data output by the detector, generate a radiation scanning image based on the detection data, and control the platform to stop rotating or rotate at a set speed when the radiation scanning image meets set conditions.

2. The radiation scanning detection device according to claim 1, characterized in that, The cargo platform includes: Driver components; A turntable connected to the drive assembly, the turntable being rotatably disposed within the receiving cavity.

3. The radiation scanning detection device according to claim 2, characterized in that, The driving component includes: Drive shaft; A direct drive motor is connected to the drive shaft, which is connected to the turntable.

4. The radiation scanning detection device according to claim 3, characterized in that, The cargo platform also includes: An incremental encoder, wherein the incremental encoder is disposed on the drive shaft; A proximity switch, comprising a marker and a detection element, wherein the marker is connected to the turntable and the detection element is connected to the housing; The control component is electrically connected to the detection element, the incremental encoder, and the direct drive motor. The control component receives a first signal from the detection element and a second signal from the incremental encoder, and controls the direct drive motor to rotate a first set angle according to the first signal and the second signal.

5. The radiation scanning detection device according to any one of claims 1 to 4, characterized in that, Also includes: A clamping mechanism is connected to the loading platform and is used to fix the object to be tested.

6. The radiation scanning detection device according to any one of claims 1-4, characterized in that, The receiving cavity has an opening, and a switch door is provided at the opening to open and close the opening. The radiation scanning detection device further includes: The safety interlock includes a first locking part and a second locking part adapted to the first locking part. The first locking part is located on the housing, and the second locking part is located on the switch door. The safety interlock is electrically connected to the control component.

7. The radiation scanning detection device according to claim 6, characterized in that, Also includes: An electromagnetic lock is used to lock the switch door when the radiation source emits radiation for radiation scanning detection. The electromagnetic lock includes a first electromagnetic locking part and a second electromagnetic locking part adapted to the first electromagnetic locking part. The first electromagnetic locking part is disposed in the housing, and the second electromagnetic locking part is disposed in the switch door. The electromagnetic lock is electrically connected to the control component.

8. The radiation scanning detection device according to claim 5, characterized in that, The clamping mechanism includes: The gripper is connected to the loading platform, and the object to be measured is adapted to be clamped in the gripper; or A backrest, the backrest being connected to the loading platform, wherein the object to be tested is adapted to rest against the backrest; or A support, connected to the loading platform, has a groove adapted to the clamping position of the object to be measured, the clamping position of the object to be measured being suitable for placement in the groove; or A base, the base being formed in a barrel shape, the closed end of the base opposite the open end being connected to the loading platform; and A flexible filler is provided, which is filled in the base and has a clamping groove, and the object to be tested is adapted to be clamped in the clamping groove.

9. A control method for a radiation scanning detection device, the radiation scanning detection device comprising a platform, a radiation source, a detector, and a control component, the control component executing the control method, the platform being rotatably disposed within a cavity of the radiation scanning detection device, an object to be tested being adapted to be placed on the platform, the radiation source and the detector being located on opposite sides within the cavity, the object to be tested on the platform being located in a scanning area between the radiation source and the detector, and receiving scanning by the radiation source, characterized in that... The control method includes: Control the rotation of the cargo platform; Control the radiation source to emit radiation for radiation scanning detection; and The system receives the detection data output by the detector and generates a radiation scan image based on the detection data. When the radiation scan image meets the set conditions, the system controls the platform to stop rotating or rotate at a set speed.

10. The control method according to claim 9, wherein the loading platform includes a drive assembly, a turntable, an incremental encoder, and a proximity switch; the drive assembly includes a direct drive motor connected to a drive shaft; and the proximity switch includes a marker connected to the turntable and a detection element connected to the housing of the radiation scanning detection device, characterized in that... The steps of controlling the rotation of the loading platform include: In response to the initial operation of the radiation scanning detection equipment after a power outage, the direct drive motor is controlled to drive the turntable to rotate via the drive shaft. When the detection element detects the marker, the direct drive motor is marked as the origin at that position; and In response to the radiation source emitting radiation for radiation scanning detection, or in response to triggering the rotation button of the platform, the direct drive motor is controlled to drive the turntable to rotate by a first set angle based on the signals from the origin and the incremental encoder.

11. The control method according to claim 9, wherein the radiation scanning detection device further comprises a housing and a safety interlock, the housing having a receiving cavity having an opening, the opening being provided with a switch door, and the safety interlock comprising a first locking part disposed on the housing and a second locking part disposed on the switch door, characterized in that, The control method further includes: In response to the locking of the first locking part and the second locking part, and triggering the radiation scanning detection device to emit a ray for radiation scanning detection, the ray source is controlled to emit rays for radiation scanning detection.

12. The control method according to claim 9, characterized in that, Also includes: The sample to be tested is matched with the radiation scan images of multiple standard objects in the standard library, and the radiation scan image of the standard sample with the highest matching degree is used as the standard sample. The standard library is pre-constructed and contains radiation scan images of multiple standard objects. The sample to be tested is registered with the standard sample; The registered test sample and the standard sample are subjected to subtraction calculation to obtain the mask for the foreign object region; and Based on the mask of the foreign object region, foreign objects in the object under test are identified.

13. The control method according to claim 9, characterized in that, Also includes: When the radiation scan image meets the set conditions, the direct drive motor is controlled to stop rotating or rotate at the set speed and a second set angle.

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