Radiation scanning detection equipment and method

Abstract

The invention provides a radiation scanning detection device and method, and the device comprises a radiation source which is used for emitting a ray beam; the object carrying platform is used for loading an object to be measured, and the object carrying platform is arranged on the emergent side of the ray source; the detector comprises a plurality of receiving parts, the plurality of receiving parts are respectively configured to receive the rays emitted by the ray source, the ray source and the detector are arranged on the two sides of the object carrying platform in the first direction, and the plurality of receiving parts are arranged at intervals in the second direction perpendicular to the first direction; wherein the scanning area of the rays emitted from the ray source and received by the plurality of receiving parts forms an imaging area, the object carrying platform is movably arranged along a second direction so as to respectively move different cut groups of the object to be detected to the imaging area, and the object carrying platform is rotatably arranged around a rotation axis parallel to the second direction so as to move the different cut groups of the object to be detected to the imaging area. The problem that radiation scanning detection equipment in the existing security inspection field cannot detect tiny changes is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of image processing and / or radiation inspection, and in particular to a radiation scanning detection device and method. Background Art

[0002] Currently, security inspection technology primarily relies on traditional X-ray radiation scanning and detection equipment. Traditional X-ray radiation scanning and detection equipment generates images by penetrating objects with radiation. While capable of identifying large dangerous objects such as controlled knives, firearms and ammunition, and flammable and explosive materials, its spatial resolution is typically at the millimeter level, making it difficult to detect small or thin explosives.

[0003] Traditional X-ray radiation scanning and inspection equipment is not suitable for verifying 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 is no effective means to detect the dangerous behavior of electronic products such as additional modifications, the addition of small chips, circuit changes, and / or the storage of small amounts of explosives in electronic products. Moreover, the detection methods and algorithms used by traditional X-ray radiation scanning and inspection equipment are complex, requiring high-resolution, clear radiation images to determine the authenticity and dangerousness of the inspected products. This requires high radiation energy and dose, which increases detection costs and makes protection more difficult.

[0004] It should be noted that the above technical background is merely provided to provide a clear and complete description of the technical solutions of the present invention and to facilitate understanding by those skilled in the art. Simply because these solutions are described in the technical background section of the present invention, it should not be assumed that the above technical solutions are well known to those skilled in the art. Summary of the Invention

[0005] In view of the above problems, the present disclosure provides a radiation scanning detection device and method, which solves the problem that existing radiation scanning detection devices in the security inspection field are unable to detect minor modifications.

[0006] According to a first aspect of the present disclosure, a radiation scanning detection device is provided, the radiation scanning detection device comprising:

[0007] A ray source, used for emitting a ray beam;

[0008] A loading platform, used for loading the object to be measured, the loading platform being arranged on the emission side of the ray source;

[0009] a detector comprising a plurality of receiving portions, each of the plurality of receiving portions being configured to receive radiation emitted from the radiation source, the radiation source and the detector being disposed on both sides of the loading platform in a first direction, and the plurality of receiving portions being arranged at intervals along a second direction forming an angle with the first direction;

[0010] In which, the scanning area of ​​the rays emitted from the ray source and received by the multiple receiving parts forms an imaging area, the loading platform is movably arranged along the second direction to move different cut groups of the object to be measured to the imaging area respectively, and the loading platform is rotatable around a rotation axis parallel to the second direction.

[0011] According to some exemplary embodiments of the present disclosure, the detector includes a plurality of linear array detectors, a plurality of the receiving parts are respectively formed on the plurality of the linear array detectors, the second direction is perpendicular to the first direction, and the plurality of the linear array detectors are arranged at intervals along the second direction.

[0012] According to some exemplary embodiments of the present disclosure, the receiving portion extends along a third direction to a boundary of the ray beam in the third direction, and the third direction is a direction perpendicular to the first direction and the second direction.

[0013] According to some exemplary embodiments of the present disclosure, the loading platform includes a turntable, which is rotatable around its own rotation axis parallel to the second direction, so that the radiation scanning detection equipment performs three-dimensional radiation scanning on each cut group of the object to be measured in the imaging area.

[0014] According to some exemplary embodiments of the present disclosure, the loading platform further includes a first movable structure and a second movable structure, wherein the first movable structure is movably arranged along the second direction to drive each cut group of the object to be measured to move into the imaging area, and the second movable structure is movably arranged along the third direction to calibrate the position of the cut group of the object to be measured in the imaging area.

[0015] According to some exemplary embodiments of the present disclosure, the radiation scanning detection device further includes a controller;

[0016] The controller is configured to:

[0017] Controlling the object-carrying platform to move along the second direction to an Nth position, where the Nth position is the position of the object-carrying platform when the Nth section group of the object to be measured is located in the imaging area;

[0018] Controlling the object-carrying platform to rotate and triggering the plurality of receiving units to collect the three-dimensional radiation scanning data of the Nth group of sections of the object to be measured;

[0019] N is a positive integer from 1 to M, and M is a total number of the divided groups of the object to be measured.

[0020] According to some example embodiments of the present disclosure, any one of the divided groups of the object to be measured comprises:

[0021] a plurality of divided regions, the plurality of divided regions are arranged at intervals along the second direction, and a height of each of the divided regions in the second direction is determined according to the height of the receiving portion in the second direction.

[0022] According to some example embodiments of the present disclosure, the controller is further configured to:

[0023] control the second moving structure to move a position offset amount in the third direction, the position offset amount being a distance between the object to be measured and the imaging area in the third direction.

[0024] According to some example embodiments of the present disclosure, the object to be measured comprises an electronic product.

[0025] A second aspect of the present disclosure provides a radiation scanning detection method, the method comprising:

[0026] moving the object to be measured in a second direction perpendicular to an exit direction of a ray beam to an Nth position, wherein the Nth position is a position of an Nth divided group of the object to be measured when located in the imaging area, the imaging area being a scanning area of rays received by the plurality of receiving portions, N being a positive integer from 1 to M, and M being a total number of the divided groups of the object to be measured;

[0027] rotating the object to be measured and collecting three-dimensional radiation scanning data of the Nth divided group of the object to be measured;

[0028] repeating the above steps until three-dimensional radiation scanning data of M divided groups of the object to be measured are completed;

[0029] stitching the three-dimensional radiation scanning data of the M divided groups of the object to be measured to generate a three-dimensional radiation scanning image of the object to be measured;

[0030] determining a risk area of the object to be measured according to the three-dimensional radiation scanning image.

[0031] According to some example embodiments of the present disclosure, the method further comprises:

[0032] determining a position offset amount according to a position of the object to be measured in a third direction perpendicular to the exit direction of the ray beam and perpendicular to the second direction, and a position of the imaging area in the third direction;

[0033] moving the object to be measured in the third direction by the position offset amount. BRIEF DESCRIPTION OF DRAWINGS

[0034] The drawings described herein are for purposes of illustration only and are not intended to limit the scope of the present disclosure. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. The drawings in which:

[0035] Figure 1A Structure diagram of some embodiments of the object to be detected for which the radiation scanning detection device and method are suitable;

[0036] Figure 1B Structure diagram of some other embodiments of the object to be detected for which the radiation scanning detection device and method are suitable;

[0037] Figure 2A First structure diagram of the radiation scanning detection device of the present invention;

[0038] Figure 2B Front view structure diagram of the radiation scanning detection device of the present invention;

[0039] Figure 2C Top view structure diagram of the radiation scanning detection device of the present invention;

[0040] Figure 3 Flow chart of the steps of the radiation scanning detection method of the present invention;

[0041] Figure 4 Supplementary flow chart of the steps of the radiation scanning detection method of the present invention. DETAILED DESCRIPTION

[0042] In order to make the technical solution in the present invention better understood by the person skilled in the art, the technical solution in the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the person skilled in the art without making any creative effort should fall within the scope of protection of the present invention.

[0043] The terms used herein are merely used to describe specific embodiments, and are not intended to limit the present disclosure. The terms "comprise", "contain", etc. used herein indicate the existence of the described features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0044] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0045] When expressions such as “at least one of A, B, and C, etc.” are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art. For example, “a system having at least one of A, B, and C” should include but is not limited to systems having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, and C, etc. When expressions such as “at least one of A, B, or C, etc.” are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art. For example, “a system having at least one of A, B, or C” should include but is not limited to systems having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, and C, etc.

[0046] Specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are intended to be illustrative only and are not intended to limit the present invention. In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that these specific details are not necessarily required to practice the present invention. In other instances, well-known structures, materials, or methods are not specifically described to avoid obscuring the present invention.

[0047] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Thus, appearances of the phrases "in one embodiment," "in an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combinations and / or subcombinations in one or more embodiments or examples. Furthermore, one of ordinary skill in the art will understand that the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] First, let’s explain some of the technical terms used in this article:

[0049] High-resolution imaging: High-resolution imaging is crucial for ensuring detection accuracy. By using high-quality X-ray sources and high-resolution detectors, combined with advanced CT imaging technology, clear internal images of the inspected object can be generated, allowing for the detection of small defects and abnormal structures. Compared to the millimeter-level detection accuracy of traditional security equipment, the electronic product CT security instrument can provide imaging accuracy of hundreds of microns, ensuring accurate reconstruction of the internal fine structure of electronic devices and improving the accuracy of inspection.

[0050] Fast scanning: Fast scanning technology can significantly improve detection efficiency and reduce detection time. By optimizing the scanning path and data processing algorithm, high-quality scanning can be completed in a short time. If the CT security instrument adopts advanced fast scanning algorithms, it can complete a CT scan in 15-30 seconds, greatly improving the efficiency of detection.

[0051] Deep learning algorithm: Deep learning algorithms play an important role in image recognition and classification. By training a deep learning model, the structural features of the internal electronic device can be accurately obtained. If the CT security instrument integrates a deep learning algorithm, it can automatically identify and classify the internal structure of the electronic device and compare it with the standard library. With the accumulation of usage data, the algorithm model can be iteratively upgraded to further improve accuracy.

[0052] The radiation scanning detection device and method provided by the embodiments of the present disclosure adopt high-resolution X-ray CT imaging technology to realize high-precision non-destructive detection of the internal structure of electronic devices. Through advanced image processing and deep learning algorithms, the internal structure of electronic devices can be automatically identified and classified, and compared with the standard library for analysis, achieving accurate detection of abnormal components. The radiation scanning detection device and method of the embodiments of the present disclosure aim to solve the shortcomings of existing security technology in detecting small explosives and disguised devices, and improve the accuracy and efficiency of security.

[0053] The cut group refers to a group of continuous regions formed by dividing the object to be tested along the second direction Z at different heights. Each cut group can contain a cut region along the second direction, and each cut group can also contain multiple cut regions arranged discretely along the second direction. The core of the division is that the height of the cut region in the second direction matches the physical height of the detector receiving part, ensuring that when the object platform moves to the target position, all cut regions within the same cut group can enter the corresponding multiple imaging areas of the multiple detector receiving parts simultaneously and be completely covered by the receiving part. Through this division method, large-sized objects to be tested are divided into multiple units that can be independently scanned, significantly reducing the amount of data processing and equipment space requirements while maintaining high-resolution scanning.

[0054] Figure 2AA first structural diagram of a radiation scanning detection device according to an embodiment of the present disclosure is schematically shown. Figure 2B A front view structural diagram of a radiation scanning detection device according to an embodiment of the present disclosure is schematically shown. Figure 2C A top view structural diagram of a radiation scanning detection device according to an embodiment of the present disclosure is schematically shown.

[0055] As shown in Figures 2A to 2C As a first aspect of the present disclosure, a radiation scanning detection device is provided, which comprises: a ray source 8 configured to emit a ray beam; a carrier platform 3 configured to load a to-be-detected object 200, the carrier platform 3 being arranged on an emission side of the ray source 8; a detector 9 comprising a plurality of receiving portions 91, each of the plurality of receiving portions 91 being configured to receive the ray emitted from the ray source 8, the ray source 8 and the detector 9 being arranged on two sides of the carrier platform 3 in a first direction X, and the plurality of receiving portions 91 being arranged at intervals in a second direction Z at an angle with the first direction X, wherein a scanning area s of the ray emitted from the ray source 8 and received by the plurality of receiving portions 91 forms an imaging area S, the carrier platform 3 is movably arranged along the second direction Z to move different cut groups of the to-be-detected object 200 to the imaging area S respectively, and the carrier platform 3 is rotatably arranged around a rotation axis T parallel to the second direction Z.

[0056] In the radiation scanning detection device provided by the embodiment of the present disclosure, the plurality of receiving portions 91 are arranged at intervals along the second direction Z, and the carrier platform 3 is movable and rotatable along the second direction Z, so that multi-angle projection data can be obtained by rotating the to-be-detected object 200, three-dimensional radiation scanning is completed, and three-dimensional radiation scanning data collection of a large to-be-detected object 200 cut into a plurality of area groups is realized. The existing three-dimensional radiation scanning device needs a large structural volume and a large floor area to lay the device, and cannot be applied to a traditional security check scene. The radiation scanning detection device provided by the embodiment of the present disclosure divides the to-be-detected object 200 into a plurality of cut groups by arranging the plurality of receiving portions 91, and moves corresponding areas of each cut group to the imaging area S in sequence, so that high-precision scanning and three-dimensional radiation scanning data collection of the entire to-be-detected object 200 can be completed in a short time, the scanning range of single three-dimensional radiation scanning can be greatly reduced, the device volume and the required site can be reduced, the single data processing amount can be reduced, the device performance tolerance can be improved, a rich information basis can be provided for subsequent three-dimensional image reconstruction, and the detection efficiency and the imaging integrity can be significantly improved. Furthermore, the radiation scanning detection device provided by the embodiment of the present disclosure can efficiently complete three-dimensional radiation scanning of the to-be-detected object 200 in a security check scene through cutting, and solves the problem that the existing radiation scanning detection device in the security check field cannot detect a slight change.

[0057] In some exemplary embodiments, the radiation scanning detection device includes a radiation source 8, a platform 3, and a detector 9. In some embodiments, the radiation source 8 is an X-ray generator; in other embodiments, the choice of radiation source 8 is not specifically limited. In some embodiments, the radiation source 8 emits radiation in a first direction X, and the radiation source 8, the platform 3, and the detector 9 are arranged in an interval along the first direction X. In other embodiments, the radiation source 8 may emit radiation in an angled manner relative to the first direction X. In some embodiments, the platform 3 is a movable device for supporting the object 200 to be tested. The platform 3 is disposed on the emission side of the radiation source 8 and between the radiation source 8 and the detector 9. The detector 9 is configured to receive radiation that has passed through the object 200 to be tested. The detector 9 includes multiple receiving portions 91 arranged in intervals along a second direction Z. The scanning area s corresponding to the radiation received by each receiving portion 91 forms an imaging area S. That is, the imaging area S includes multiple scanning areas s arranged in intervals along the second direction Z, which are configured to scan each section of the object 200 to be tested.

[0058] In some exemplary embodiments, when performing step-by-step scanning on the object 200 to be measured, the object 200 to be measured is first divided into a plurality of consecutively numbered detection areas at equal intervals along the second direction Z. The division intervals are dynamically determined based on the physical arrangement characteristics of the receiving units 91. Based on the number K of receiving units 91 distributed in the second direction Z, the detection areas are reorganized into a plurality of discrete slice groups based on the number K and the distances between adjacent receiving units 91. The stage 3 is then translated a certain distance along the second direction Z each time, so that all portions of the same slice group fall entirely within the imaging area S. The stage 3 is rotated to scan the object 200 to synchronously acquire three-dimensional radiation scanning data of the detection area corresponding to the slice group. In some embodiments, the radiation beam is a conical radiation beam. To ensure that multiple slice groups of the object 200 to be measured fall within the imaging area S during acquisition, a certain overlap ratio can be formed between the scanning areas s of adjacent slice groups in the second direction Z to facilitate seamless fusion using a phase matching algorithm during data reconstruction.

[0059] like Figures 2A to 2C As shown, according to some embodiments of the present disclosure, the detector 9 includes a plurality of linear array detectors, a plurality of receiving parts 91 are respectively formed on the plurality of linear array detectors, the second direction Z is perpendicular to the first direction X, and the plurality of linear array detectors are arranged at intervals along the second direction Z.

[0060] The radiation scanning detection device provided in the disclosed embodiments further optimizes scanning coverage and resolution by employing multiple independent linear array detectors spaced apart along the second direction Z. Each linear array detector corresponds to a corresponding receiving unit 91. The modular design facilitates maintenance and upgrades. The receiving units 91 are formed on the linear array detectors. If a linear array detector malfunctions, it can be replaced individually without affecting the operation of the entire device.

[0061] like Figures 2A to 2C As shown, according to some embodiments of the present disclosure, the receiving portion 91 extends along the third direction Y to the boundary of the ray beam in the third direction Y, and the third direction Y is a direction perpendicular to the first direction X and the second direction Z.

[0062] The radiation scanning detection device provided in the disclosed embodiments extends the receiving portion 91 along the third direction Y to the boundary of the radiation beam, achieving full coverage scanning in the third direction Y. This avoids edge data loss caused by positional deviation of the object 200 or excessive width of the object 200 in the third direction Y. The extended design of the receiving portion 91 ensures that the imaging area S completely covers the object 200 in the third direction Y, improving the integrity and accuracy of the scan data.

[0063] In some exemplary embodiments, the second direction Z is set to a vertical direction, and the receiving unit 91 forms a continuously covered detection receiving area in the third direction Y, that is, in a plane direction perpendicular to the first direction X and the second direction Z. This direction corresponds to the lateral expansion dimension of the beam in the spatial coordinate system. Each receiving unit 91 is extended along the third direction Y, and its length direction remains parallel to the lateral divergence direction of the beam, so that the combined detection range of all receiving units 91 completely covers the effective irradiation area of ​​the beam in the third direction Y. When the loading platform 3 carries a large-sized object 200 to be tested or is installed offset, the extended structure of the receiving unit 91 ensures that the object 200 to be tested can be completely captured by the receiving unit 91 when it deviates in the third direction Y, eliminating the phenomenon of edge data truncation caused by insufficient detection width in traditional designs.

[0064] In some embodiments, that is, in a detection scenario where a mobile device drives each loading platform 3 and the object to be tested 200 loaded on each loading platform 3 to move to the detection equipment, when the object to be tested 200 is easily affected by the error of the mobile device and is prone to random offset in the third direction Y during transportation, the extended design of the receiving part 91 can still maintain complete data collection and can also cooperate with a sliding window-type data processing algorithm to effectively eliminate edge data fluctuations caused by vibration.

[0065] like Figures 2A to 2CAs shown, according to some embodiments of the present disclosure, the loading platform 3 includes a turntable, which can be rotatably arranged around its own rotation axis T parallel to the second direction Z, so that the radiation scanning detection equipment performs three-dimensional radiation scanning on each cut group of the object to be measured 200 in the imaging area S.

[0066] The radiation scanning detection device provided in the disclosed embodiment utilizes a turntable to rotate the object carrier 3, enabling multi-angle, three-dimensional scanning of each cut group. This rotational scanning, combined with the high-resolution characteristics of the area array detector 9, can acquire three-dimensional information about the internal structure of an object, significantly improving the accuracy of identifying the risk area 300 while reducing misjudgments caused by a single projection angle.

[0067] In some exemplary embodiments, the turntable provided on the object platform 3 is rotatable about its own rotation axis T parallel to the second direction Z, enabling multi-angle scanning of the object 200 in the imaging area S. In some embodiments, after the Nth section group of the object 200 enters the imaging area S, the turntable can rotate at a set angular velocity, allowing the linear array detector to scan the risk area 300 of the object 200 at different angles. This multi-angle scanning approach can obtain comprehensive information about the object's risk area 300, providing a rich data foundation for subsequent three-dimensional image reconstruction and ensuring more accurate and comprehensive detection results.

[0068] like Figures 2A to 2C As shown, according to some embodiments of the present disclosure, the loading platform 3 further includes a first movable structure and a second movable structure. The first movable structure is movably arranged along the second direction Z to drive each cut group of the object to be measured 200 to move into the imaging area S, and the second movable structure is movably arranged along the third direction Y to calibrate the position of the cut group of the object to be measured 200 in the imaging area S.

[0069] The radiation scanning detection device provided by the embodiment of the present disclosure further optimizes the position calibration capability of the radiation scanning detection device by providing a first moving mechanism and a second moving mechanism. The first moving mechanism realizes the rapid switching of the cutting groups in the second direction Z, so that each cutting group of the object to be tested 200 can be quickly moved to the imaging area S. Due to the high imaging accuracy of three-dimensional imaging, the position requirements of the object are relatively strict. If the position of the object to be tested 200 in the third direction Y is offset during the movement process, it may cause the imaging of part of the connection area to be blurred or missing. Furthermore, the newly loaded object to be tested 200 will also have deviations in the third direction Y, which will affect the accuracy of the detection results in the structural analysis of the imaging image. The second moving mechanism fine-tunes the position of the object to be tested 200 along the third direction Y to ensure that each cutting group is accurately aligned with the center of the imaging area S and moves each cutting group into the radiation beam, avoiding imaging blur or data loss caused by position offset.

[0070] In some exemplary embodiments, the first movable structure drives the carrier platform 3 to move along the second direction Z. The first movable structure moves according to a preset step length, so that each slice group sequentially enters the imaging area S. For example, after completing the scanning of the Nth slice group, the first movable structure drives the carrier platform 3 to move by the spacing of one slice group, so that the (N+1)th slice group is precisely aligned with the imaging area S. This process can be quickly switched through programmatic control to ensure that no slice group is missed in the scanning.

[0071] In some exemplary embodiments, the second movable structure drives the object platform 3 to perform fine-tuning movement along the third direction Y. After the cut group enters the imaging area S, an offset is calculated based on the difference between the actual position of the cut group of the object 200 in the third direction Y and the theoretical position of the center of the imaging area S. The second movable structure is then controlled to move along the third direction Y to compensate for this offset. For example, if the object 200 vibrates during movement, causing the center of the cut group to deviate by 1 mm from the center of the imaging area S, the second movable structure will move 1 mm along the third direction Y to ensure that the radiation beam penetrates perpendicularly to the center of the cut group, thus avoiding edge projection distortion or data loss.

[0072] like Figures 2A to 2C As shown, according to some embodiments of the present disclosure, the radiation scanning detection equipment further includes a controller; the controller is configured to: control the carrier platform 3 to move to the Nth position along the second direction Z, the Nth position being the position of the carrier platform 3 when the Nth cut group of the object to be measured 200 is located in the imaging area S; control the carrier platform 3 to rotate, and trigger multiple receiving parts 91 to collect three-dimensional radiation scanning data of the Nth cut group of the object to be measured 200; wherein N is a positive integer from 1 to M, and M is the total number of cut groups into which the object to be measured 200 is divided.

[0073] The radiation scanning detection device provided by the embodiments of the present disclosure can realize efficient cooperation in the whole process. The controller sequentially moves the object to be detected 200 to the positions corresponding to the segmentation groups, and triggers the rotation scanning, thereby significantly reducing the manual intervention and improving the detection consistency and reliability.

[0074] In some exemplary embodiments, the controller dynamically calculates the total number M of segmentation groups based on the height of the receiving part 91 in the second direction Z, the distance between adjacent receiving parts 91, the divergence angle of the cone-shaped ray beam, the distance between the object to be detected 200 and the receiving part 91, and the height of the object to be detected 200, to ensure that the coverage of the plurality of segmentation groups completely covers and connects.

[0075] In the risk identification stage, the control component can identify the risk area 300 of the object to be detected 200 according to the preset algorithm and rules through analysis and processing of the first radiation scanning image. In some embodiments, an image subtraction algorithm can be used to screen out the risk area 300. In other embodiments, an edge detection algorithm (such as Canny operator) can also be used to identify the area with abnormal density in the image and mark it as the risk area 300.

[0076] In some exemplary embodiments, the method for screening the risk area 300 includes steps S610 to S640.

[0077] Specifically, in step S610, the radiation scanning image of the object to be detected 200 is matched with the radiation scanning images of a plurality of standard objects in a standard library, and the radiation scanning image of the standard sample with the highest matching degree is taken as the standard sample. The standard library is pre-constructed, and the radiation scanning images of a plurality of standard objects are pre-stored in the standard library.

[0078] As some possible implementations, features of the object 200 to be tested may be extracted, including but not limited to contour features, texture features, and density distribution features. Features corresponding to the object 200 to be tested may be extracted from radiation scan images of multiple standard objects in a standard library. The similarity between the features of the radiation scan images of the object 200 to be tested and each standard object is calculated, and the radiation scan image of the standard object with the highest similarity to the object 200 to be tested is used as the standard sample.

[0079] In step S620, the object to be tested 200 is registered with the standard sample. Registering the object to be tested 200 with the standard sample can be understood as aligning the object to be tested 200 with the standard sample in space (position, angle, size, etc.) so that the object to be tested 200 and the standard sample are as geometrically consistent as possible.

[0080] In step S630, a subtraction calculation is performed on the registered object 200 and the standard sample to obtain a mask of the foreign object area. In some examples, a pixel-level difference calculation is performed on the registered object 200 and the standard sample to obtain a binary image (mask). The binary image is composed of white pixels (value 1) and black pixels (value 0).

[0081] In step S640, foreign objects in the object to be detected are identified based on the foreign object area mask. White pixels in the binary image can represent possible foreign object areas, while black pixels can represent background or indifferent areas. Therefore, foreign objects in the object to be detected can be identified based on the foreign object area mask.

[0082] Through steps S610 to S640, it is possible to automatically determine whether a foreign object is present in the corresponding object under test based on the acquired object under test 200, thereby achieving high detection efficiency. Furthermore, through precise image registration and subtraction calculation, foreign objects in the object under test can be effectively identified, achieving high detection accuracy. Based on this, the control method disclosed herein can be widely applied in fields such as product quality testing and safety testing.

[0083] like Figures 2A to 2C As shown, according to some embodiments of the present disclosure, any cutting group of the object to be tested 200 includes: multiple cutting areas, the multiple cutting areas are arranged at intervals along the second direction Z, and the height of each cutting area in the second direction Z is determined according to the height of the receiving part 91 in the second direction Z.

[0084] The radiation scanning detection equipment provided by the embodiment of the present disclosure has a cutting group including multiple cutting areas spaced along the second direction Z, which optimizes the granularity of data acquisition and makes the height of each cutting area match the height of the receiving part 91, ensuring seamless connection of the scanning data, avoiding excessive overlap or gaps, and providing a high-quality foundation for subsequent data splicing.

[0085] In some exemplary embodiments, each cutting group of the object to be measured 200 is further divided into a plurality of cutting areas spaced apart along the second direction Z, and the height of each cutting area in the second direction Z is determined by the height of the receiving unit 91 in the second direction Z. Specifically, in some embodiments, when the beam of rays is a parallel beam, if the height of the receiving unit 91 is H, the height of each cutting area is also set to H, so that when the loading platform 3 moves along the second direction Z, the receiving unit 91 can completely cover the projection range of the current cutting area. Through this design, adjacent cutting areas have neither overlap nor gaps during the movement process, ensuring that the scanning data is continuously and evenly distributed in the second direction Z. Since the height of each cutting area is precisely matched with the detection capability of the receiving unit 91, it can effectively reduce noise interference caused by incomplete coverage or repeated scanning, and avoid artifacts or breaks caused by regional misalignment during data splicing, thereby significantly improving the accuracy and consistency of the three-dimensional reconstructed image, and providing a high-integrity data foundation for subsequent risk analysis. In another specific embodiment, in a scenario where the beam is a conical beam, the height of each cut area in the second direction Z needs to be dynamically adjusted according to the divergence angle of the ray source 8 and the distance between the object to be measured 200 and the receiving part 91. Due to the projection characteristics of the cone beam, the coverage height of the cut area on the side close to the ray source 8 in the second direction Z is relatively small, and the coverage height on the side away from the ray source 8 gradually increases, but the final projection height of all cut areas does not exceed the height H of the receiving part 91. Based on the divergence angle of the beam and the position of the object to be measured 200, the proximal and distal heights of each cut area are calculated to ensure that the projection ranges of adjacent cut areas are seamlessly connected during the movement. For example, when the object to be measured 200 moves along the second direction Z, the actual coverage height of the proximal cut area is smaller than that of the distal area due to the influence of the divergence angle of the beam, but through dynamic division, it can still be ensured that there is neither overlap nor gap between adjacent areas. This design ensures that the receiving unit 91 always completely covers the projection range of the current segmented area, avoiding incomplete or redundant data acquisition due to the geometric characteristics of the cone beam, thereby reducing misalignment and artifacts during image stitching and significantly improving the integrity and accuracy of three-dimensional reconstruction.

[0086] like Figures 2A to 2C As shown, according to some embodiments of the present disclosure, the controller is further configured to: control the second movable structure to move a position offset along the third direction Y, where the position offset is the distance between the object to be measured 200 and the imaging area S in the third direction Y.

[0087] In the actual detection process, due to the shape, size and position of the risk area 300 of the object to be detected 200, if the object is not accurately positioned, part of the risk area 300 may not be completely scanned by the detector 9, resulting in the risk of missed detection. The radiation scanning detection device provided by the embodiments of the present disclosure ensures that the object to be detected 200 is completely within the effective scanning range of the detector 9 through the accurate calculation and control of the control assembly, avoiding the situation of partial area missed detection, and further improving the accuracy and reliability of the detection. By automatically calculating and adjusting the position offset of the third direction Y by the controller, the positioning accuracy of the present embodiment is further improved. The offset is dynamically adjusted according to the relative position of the object to be detected 200 and the imaging area S, ensuring accurate alignment of each sub-group in three-dimensional space and reducing manual calibration errors.

[0088] In some exemplary embodiments, a coordinate system is established in three directions of the first direction X, the second direction Z and the third direction Y, and the control assembly determines according to the coordinates (x, y, z) of the edge point of the object to be detected 200 away from the imaging area S and the boundary values (zmin, zmax) of the imaging area S in the third direction Y, calculates the position offset Δz = |zmax-z| or |zmin-z|, wherein if the edge point of the object to be detected 200 away from the imaging area S is close to the boundary zmax of the imaging area S in the third direction Y, then the position offset Δz = |zmax-z|; if the edge point of the object to be detected 200 away from the imaging area S is close to the boundary zmin of the imaging area S in the third direction Y, then the position offset Δz = |zmin-z|. The second moving mechanism is controlled to move Δz along the third direction Y, so that the risk area 300 is aligned with the receiving part 91.

[0089] As shown in FIG. 1, according to some embodiments of the present disclosure, the object to be detected 200 includes an electronic product. Figures 1A to 1B

[0090] Electronic products usually have complex internal structures, such as circuit boards, chips and other small components, which may have some safety hazards during production and use, such as hidden micro-explosives or illegal modifications. In view of these characteristics of electronic products, the radiation scanning detection device provided by the embodiments of the present disclosure and the scanning mode of sub-scanning and splicing can effectively detect the micro-abnormal structure inside the electronic product. In view of the internal structure characteristics of the electronic product (such as circuit boards, chips, etc.), the combined scanning mode and high-resolution imaging capability of the present device can effectively detect micro-explosives or illegal modifications, fill the gap of traditional security technology, break through the detection limitation of traditional security technology on micro-foreign matter, and realize the all-around coverage of the internal hidden dangers of the electronic product.

[0091] ​In some exemplary embodiments, when the object to be measured 200 is an electronic product (such as a smart phone), the controller can further divide the internal components of the electronic product into multiple segmentation groups according to the internal components thereof, perform three-dimensional radiation scanning on the multiple segmentation groups, and realize three-dimensional radiation scanning imaging of specific regions, thereby achieving a balance between scanning efficiency and scanning fineness, and enabling the radiation scanning detection device provided by the embodiments of the present disclosure to be applied to customs security and other application scenarios. For example, for a battery region segmentation group of a smart phone, the three-dimensional radiation scanning data can identify the position offset or abnormal shape of the battery after being spliced; for a mobile phone mainboard region segmentation group, the high-resolution spliced image after splicing of the three-dimensional radiation scanning data can restore the details of the circuit board and detect whether there is an additional microchip or circuit tampering.

[0092] As shown in Figure 3 a second aspect of the present disclosure provides a radiation scanning detection method, the method comprising operations S100-S500:

[0093] In operation S100, the object to be measured 200 is moved along a second direction Z perpendicular to the emission direction of the ray beam to an Nth position, where the Nth position is the position of the Nth segmentation group of the object to be measured 200 when located in the imaging area S, the imaging area S is the scanning area s of the rays received by the plurality of receiving portions 91, N is a positive integer from 1 to M, and M is the total number of segmentation groups of the object to be measured 200.

[0094] In operation S200, the object to be measured 200 is rotated, and three-dimensional radiation scanning data of the Nth segmentation group of the object to be measured 200 is collected.

[0095] In operation S300, steps S100-S200 are repeated until the three-dimensional radiation scanning data of the M segmentation groups of the object to be measured 200 is completed.

[0096] In operation S400, the three-dimensional radiation scanning data of the M segmentation groups of the object to be measured 200 is spliced to generate a three-dimensional radiation scanning image of the object to be measured 200.

[0097] In operation S500, according to the three-dimensional radiation scanning image, a risk region 300 of the object to be measured 200 is determined.

[0098] The radiation scanning detection method provided by the embodiments realizes efficient three-dimensional imaging of the object to be measured 200 through regional scanning, rotation collection, and data splicing. Step-by-step scanning reduces the amount of data processing at a time, rotation collection improves the degree of detail restoration, and finally splicing generates a complete three-dimensional image, which provides a comprehensive basis for risk region 300 identification.

[0099] In some embodiments, for smartphone battery area inspection, the method involves first dividing the battery area into several sections based on the compatibility of the battery's overall height in the second direction Z with the height of the detection range of the receiving unit 91, ensuring that multiple sections within each section can simultaneously enter the imaging area S. The battery area is then gradually moved along the second direction Z, with each section precisely positioned at the center of the imaging area S. Fine-tuning in the third direction Y compensates for any placement deviations in the battery area, ensuring that the current section of the battery area falls within the scanning area S of the radiation beam. Subsequently, the battery area is rotated at a constant speed about an axis parallel to the second direction Z, synchronously capturing multi-angle 3D radiation scan data for the current section, completely covering the three-dimensional information of the battery's internal structure. After completing the scanning of the current section, the loading platform 3 moves to the next section, repeating the rotation and data acquisition process. The scan data of all sections are then fused sequentially along the second direction Z using an image stitching algorithm. Areas are aligned based on common features such as the battery shell contour and electrode connection points, eliminating stitching gaps, ultimately generating a complete 3D radiation scan image of the battery. By analyzing whether there is abnormal density distribution, irregular gaps or structural deformation in the image, the risk areas 300 such as potential hidden explosives or electrode tampering inside the battery can be accurately identified, providing a reliable basis for safety assessment. In other embodiments, the radiation scanning detection method provided in this embodiment can also be implemented in a targeted manner according to the specific structure of the object to be tested 200.

[0100] like Figure 4 As shown, according to some embodiments of the present disclosure, before step S100, the method further includes operations S010 to S020:

[0101] In operation S010 , a position offset is determined according to a position of the object 200 in a third direction Y perpendicular to the emitting direction of the ray beam and perpendicular to the second direction Z, and a position of the imaging area S in the third direction Y.

[0102] In operation S020 , the object to be measured 200 is moved along the third direction Y by a position offset.

[0103] The radiation scanning detection method provided in this embodiment further ensures the precise alignment of each cutting group by adding a third-direction Y position calibration step before scanning. The offset calculation and compensation eliminate the imaging error caused by object placement deviation, thereby improving data quality and detection reliability.

[0104] In some embodiments, the radiation scanning detection method provided by the embodiments can be used for detecting the battery area of a smartphone. In the initial calibration stage, the specific implementation of the method further includes calculating an initial offset according to the difference between the actual position of the battery in the third direction Y and the theoretical position of the center of the imaging area S, and compensating for the movement of the battery along the third direction Y of the object platform 3 to align the battery as a whole with the center of the imaging area S. As the scanning starts, the battery moves each sub-group along the second direction Z into the imaging area S. Due to the irregular shape of the battery, the local area of each sub-group may be offset in the third direction Y. Therefore, the actual position of each sub-group entering the imaging area S is monitored in real time, and the real-time offset in the third direction Y is dynamically calculated to control the continuous fine adjustment of the position of the battery during the movement. For example, when the curved edge of the battery causes the projection of each sub-group to deviate to one side of the imaging area S, the battery immediately moves in the opposite direction to ensure that the center of each sub-group is always aligned with the radiation beam penetration area. Through this dynamic tracking and compensation mechanism, even if the battery shape is complex or there is an assembly deviation, the scanning data of each sub-group can still maintain complete coverage and accurate alignment, avoiding imaging blur or splicing misalignment caused by local offset, and finally generating a high-consistency three-dimensional radiation image to accurately identify potential micro-foreign objects or structural abnormalities in the battery.

[0105] The above describes embodiments of the present disclosure. However, these embodiments are only for illustrative purposes, and are not intended to limit the scope of the present disclosure. Although each embodiment is described above separately, this does not mean that the measures in each embodiment cannot be used advantageously in combination. Those skilled in the art can make various substitutions and modifications without departing from the scope of the present disclosure, and these substitutions and modifications should all fall within the scope of the present disclosure.

Claims

1. A radiation scanning detection device, characterized in that: The radiation scanning detection equipment includes: A ray source, used for emitting a ray beam; A loading platform, used for loading the object to be measured, the loading platform being arranged on the emission side of the ray source; a detector comprising a plurality of receiving portions, each of the plurality of receiving portions being configured to receive radiation emitted from the radiation source, the radiation source and the detector being disposed on both sides of the loading platform in a first direction, and the plurality of receiving portions being arranged at intervals along a second direction forming an angle with the first direction; In which, the scanning area of ​​the rays emitted from the ray source and received by the multiple receiving parts forms an imaging area, the loading platform is movably arranged along the second direction to move different cut groups of the object to be measured to the imaging area respectively, and the loading platform is rotatable around a rotation axis parallel to the second direction.

2. The radiation scanning detection device according to claim 1, characterized in that: The detector includes a plurality of linear array detectors, the plurality of receiving parts are respectively formed on the plurality of linear array detectors, the second direction is perpendicular to the first direction, and the plurality of linear array detectors are arranged at intervals along the second direction.

3. The radiation scanning detection device according to claim 1 or 2, characterized in that: The receiving portion extends along a third direction to a boundary of the ray beam in the third direction, and the third direction is a direction perpendicular to the first direction and the second direction.

4. The radiation scanning detection device according to claim 3, characterized in that: The object carrying platform includes a turntable, which is rotatable around its own rotation axis parallel to the second direction, so that the radiation scanning detection device performs three-dimensional radiation scanning on each section group of the object to be detected in the imaging area.

5. The radiation scanning detection device according to claim 4, characterized in that: The loading platform also includes a first movable structure and a second movable structure. The first movable structure is movably arranged along the second direction to drive each cut group of the object to be measured to move into the imaging area. The second movable structure is movably arranged along the third direction to calibrate the position of the cut group of the object to be measured in the imaging area.

6. The radiation scanning detection device according to claim 5, characterized in that: The radiation scanning detection device further includes a controller; The controller is configured to: Controlling the object-carrying platform to move along the second direction to an Nth position, where the Nth position is the position of the object-carrying platform when the Nth section group of the object to be measured is located in the imaging area; Controlling the object-carrying platform to rotate and triggering the plurality of receiving units to collect the three-dimensional radiation scanning data of the Nth group of sections of the object to be measured; Wherein, N is a positive integer from 1 to M, and M is the total number of cut groups into which the object to be measured is divided.

7. The radiation scanning detection device according to claim 6, characterized in that: Any segmentation group of the object to be measured includes: A plurality of cutting areas are provided, and the plurality of cutting areas are spaced apart along the second direction. The height of each cutting area in the second direction is determined according to the height of the receiving portion in the second direction.

8. The radiation scanning detection device according to claim 6, characterized in that: The controller is further configured to: The second movable structure is controlled to move along the third direction by a position offset, where the position offset is the distance between the object to be measured and the imaging area in the third direction.

9. The radiation scanning detection device according to claim 6 or 8, characterized in that: The object to be tested includes an electronic product.

10. A radiation scanning detection method, characterized in that: The method comprises: Moving the object to be measured along a second direction perpendicular to the emission direction of the radiation beam to an Nth position, wherein the Nth position is the position of the Nth section group of the object to be measured when it is located in the imaging area, the imaging area being a scanning area of ​​the radiation received by the multiple receiving parts, N being a positive integer from 1 to M, and M being the total number of sections into which the object to be measured is divided; Rotating the object to be measured and collecting three-dimensional radiation scanning data of an N-th group of slices of the object to be measured; Repeat the above steps until the three-dimensional radiation scanning data of M cut groups of the object to be measured are completed; splicing the three-dimensional radiation scanning data of the M cut groups of the object to be measured to generate a three-dimensional radiation scanning image of the object to be measured; A risk area of ​​the object to be detected is determined according to the three-dimensional radiation scanning image.

11. The radiation scanning detection method according to claim 10, characterized in that: The method further comprises: determining a position offset according to a position of the object to be measured in a third direction perpendicular to the emission direction of the ray beam and perpendicular to the second direction, and a position of the imaging area in the third direction; The object to be measured is moved along the third direction by the position offset.

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