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 rays which are emitted from the ray source and pass through the object to be detected, the ray source and the detector are arranged on two sides of the loading platform in a first direction, and the plurality of receiving parts are arranged at intervals along a second direction perpendicular to the first direction; wherein the scanning area of the rays received by the plurality of receiving parts is an imaging area, the detector is movably arranged along a second direction so as to move the imaging area to the positions of different cutting groups covering the object to be detected, and the object carrying platform is rotatably arranged around a rotation axis parallel to the second direction so as to move the imaging area to the positions of different cutting groups covering the object to be detected. The problem that radiation scanning detection equipment in the existing security inspection field cannot detect tiny changes is solved.

Description

Technical Field

[0001] This disclosure relates to the fields of image processing and / or radiation inspection technology, and specifically to a radiation scanning detection device and 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 objects, such as controlled knives, firearms, ammunition, and flammable and explosive objects. 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] It should be noted that the above description of the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of the present invention and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background section of this invention. Summary of the Invention

[0005] In view of the above problems, this disclosure provides a radiation scanning detection device and method. It solves the problem that existing radiation scanning detection devices in the security inspection field cannot detect minor modifications.

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

[0007] A radiation source is used to emit a radiation beam; a platform is used to load the object to be tested, and the platform is located on the emission side of the radiation source; a detector includes multiple receiving units, each configured to receive radiation emitted from the radiation source and passing through the object to be tested; the radiation source and the detector are arranged on both sides of the platform in a first direction; the multiple receiving units are arranged at intervals along a second direction at an angle to the first direction; wherein, the scanning area of ​​the radiation received by the multiple receiving units is an imaging area; the detector is movable along the second direction to move the imaging area to cover different sections of the object to be tested; and the platform is rotatable about a rotation axis parallel to the second direction.

[0008] According to some exemplary embodiments of this disclosure, the distance between two adjacent receiving units is A, and the height of each receiving unit in the second direction is B, wherein A is a positive integer multiple of B, and the second direction is perpendicular to the first direction.

[0009] According to some exemplary embodiments of this disclosure, the number of the plurality of receiving units is determined based on the spacing A between two adjacent receiving units, the height B of the receiving unit in the second direction, and the range of the ray beam in the second direction, so as to arrange the maximum number of ray beams in the range of the second direction.

[0010] According to some exemplary embodiments of this disclosure, the spacing A between two adjacent receiving portions is equal to the height B of the receiving portion in a second direction.

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

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

[0013] According to some exemplary embodiments of this disclosure, the cargo platform includes:

[0014] A first movable structure is movably disposed along the third direction;

[0015] A second movable structure is movably disposed along the second direction;

[0016] The first moving structure and the second moving structure are used to calibrate the position of the object under test in the X-ray beam.

[0017] According to some exemplary embodiments of this disclosure, the cargo platform includes:

[0018] A turntable is rotatably configured about its own rotation axis parallel to the second direction, so that the radiation scanning detection device can perform three-dimensional radiation scanning on each segment of the object under test through the imaging area.

[0019] According to some exemplary embodiments of this disclosure, the detector further includes:

[0020] A third moving structure is movably disposed along a second direction and is used to drive the plurality of receiving parts of the detector to move along the second direction.

[0021] According to some exemplary embodiments of this disclosure, the detector further includes:

[0022] A fourth moving structure is movably disposed along the third direction, used to drive the plurality of receiving parts of the detector to move along the third direction, so as to move the imaging area upward along the third direction.

[0023] According to some exemplary embodiments of this disclosure, the radiation scanning detection device further includes a controller;

[0024] The controller is configured to:

[0025] The detector is controlled to move along the second direction to the Nth position, where the Nth position is the position of the detector in the second direction when the imaging area scans the Nth segment of the object under test;

[0026] The platform is controlled to rotate, and multiple receiving units are triggered to collect three-dimensional radiometric scan data of the Nth segment of the object under test.

[0027] Where N is a positive integer from 1 to M, and M is the total number of segments into which the object to be tested is divided in the second direction.

[0028] According to some exemplary embodiments of this disclosure, any segmentation group of the object under test includes:

[0029] Multiple segmented regions are provided, and the multiple segmented regions are spaced apart along a second direction. The height of each segmented region in the second direction is determined according to the height of the receiving part in the second direction.

[0030] According to some exemplary embodiments of this disclosure, each of the segmented regions further includes:

[0031] Multiple subdivided regions are arranged along a third direction, and the length of each subdivided region in the third direction is determined according to the length of the receiving unit in the third direction.

[0032] According to some exemplary embodiments of this disclosure, the controller is further configured to:

[0033] The fourth moving structure is controlled to move along the third direction to the NP position, where the NP position is the position of the fourth moving structure in the third direction when the imaging area covers the P subdivision region group of the Nth segment of the object under test;

[0034] The platform is controlled to rotate, and multiple receiving units are triggered to acquire three-dimensional radiometric scan data of the Pth subdivision region group of the Nth segment of the object under test.

[0035] Where P is a positive integer from 1 to 0, and 0 is the total number of subdivision regions of the object under test in the third direction. The total number of subdivision regions is determined based on the length of the object under test in the third direction and the length of the subdivision regions in the third direction.

[0036] According to some exemplary embodiments of this disclosure, the controller is further configured to:

[0037] The first moving structure is moved by a first position offset along a third direction, where the first position offset is the distance between the object under test and the ray beam in the third direction.

[0038] The second moving structure is controlled to move along the second direction by a second position offset, the second position offset being the distance between the object under test and the ray beam in the second direction.

[0039] According to some exemplary embodiments of this disclosure, the object to be tested includes electronic products.

[0040] A second aspect of this disclosure provides a radiation scanning detection method, the method comprising:

[0041] The imaging area is moved to the Nth position along a second direction perpendicular to the emission direction of the X-ray beam. The imaging area is the scanning area of ​​the X-rays received by a plurality of receiving units. The plurality of receiving units are arranged at intervals along the second direction. The Nth position is the position of the imaging area in the second direction when it covers the Nth segment of the object under test. N is a positive integer from 1 to M, and M is the total number of segments of the object under test in the second direction.

[0042] Rotate the object under test and acquire three-dimensional radiometric scan data of the Nth segment of the object under test;

[0043] Repeat the above operation until the three-dimensional radiometric scan data of the M segments of the object under test are completed;

[0044] The three-dimensional radiometric scan data of the object under test are stitched together from M segments to generate a three-dimensional radiometric scan image of the object under test.

[0045] Based on the three-dimensional radiometric scan image, the risk area of ​​the object under test is determined.

[0046] According to some exemplary embodiments of this disclosure, the method further includes:

[0047] The first position offset is determined based on the position of the object under test in a third direction that is perpendicular to the emission direction of the ray beam and perpendicular to the second direction, and the position of the ray beam in the third direction.

[0048] Move the object under test along the third direction by the first position offset;

[0049] The second position offset is determined based on the position of the object under test in the second direction and the position of the ray beam in the second direction;

[0050] The object to be tested is moved along the second direction by the second position offset.

[0051] According to some exemplary embodiments of this disclosure, the Nth segmentation group includes O Pth subdivision regions divided upwards on a third direction perpendicular to the emission direction of the X-ray beam and perpendicular to the second direction. The process of rotating the object under test and acquiring the three-dimensional radiation scan data of the Nth segmentation group of the object under test further includes...

[0052] The imaging area is moved along the third direction to the NP position, wherein the NP position is the position in the third direction when the imaging area covers the P subdivision region group of the Nth segment of the object under test, P is a positive integer from 1 to 0, and 0 is the total number of subdivision region groups divided by the object under test in the third direction. The total number of subdivision region groups is determined according to the length of the object under test in the third direction and the length of the subdivision region in the third direction.

[0053] Rotate the object under test and acquire three-dimensional radiometric scan data of the Pth subdivision region group of the Nth segment of the object under test;

[0054] Repeat the above operation until the three-dimensional radiometric scan data of all the Nth subdivisions and Pth subdivisions of the object under test are completed. Attached Figure Description

[0055] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and are not intended to specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances. In the drawings:

[0056] Figure 1A Structural diagrams of some embodiments of the object to be tested for use in radiation scanning detection equipment and methods;

[0057] Figure 1B Structural diagrams of other embodiments of the object to be tested to which radiation scanning detection equipment and methods are applicable;

[0058] Figure 2A This is a first structural diagram of the radiation scanning detection device of the present invention;

[0059] Figure 2B This is a front view structural diagram of the radiation scanning detection device of the present invention;

[0060] Figure 2C This is a top view of the radiation scanning detection device of the present invention;

[0061] Figure 3 This is a flowchart of the radiation scanning detection method of the present invention;

[0062] Figure 4 This is a flowchart of the first supplementary step of the radiation scanning detection method of the present invention;

[0063] Figure 5 This is a flowchart of the second supplementary step of the radiation scanning detection method of the present invention. Detailed Implementation

[0064] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0065] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0066] 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 are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0067] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone 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, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone 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, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0068] Specific embodiments of the present invention will now be described in detail. It should be noted that the embodiments described herein are for illustrative purposes only and are not intended to limit the invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other instances, well-known structures, materials, or methods have not been specifically described to avoid obscuring the invention.

[0069] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "in an embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled 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.

[0070] First, let's explain some of the technical terms used in this article:

[0071] High-resolution imaging: High-resolution imaging is key to ensuring detection accuracy. Utilizing a high-quality X-ray source and a high-resolution detector, combined with advanced CT imaging technology, it can generate clear internal images of the inspected object, revealing even minute defects and abnormal structures. Compared to the millimeter-level detection accuracy of traditional security inspection equipment, the high-resolution detector provides imaging accuracy at a resolution of hundreds of micrometers, ensuring accurate reconstruction of the fine internal structures of electronic devices, thereby improving inspection accuracy.

[0072] Rapid scanning: Rapid scanning technology can significantly improve detection efficiency and reduce detection time. By optimizing the scanning path and data processing algorithms, high-quality scans can be completed in a short time. If a CT scanner adopts an advanced rapid scanning algorithm, it can complete a CT scan within 15-30 seconds, greatly improving detection efficiency.

[0073] Deep learning algorithms play a crucial role in image recognition and classification. By training deep learning models, the internal structural features of electronic devices can be accurately acquired. If a CT scanner integrates deep learning algorithms, it can automatically identify and classify the internal structure of electronic devices and compare it with a standard library. As data accumulates, the accuracy can be further improved through iterative upgrades of the algorithm model.

[0074] The radiation scanning detection equipment and method provided in this disclosure adopts high-resolution X-ray CT imaging technology to achieve high-precision non-destructive testing of the internal structure of electronic equipment. Through advanced image processing and deep learning algorithms, it can automatically identify and classify the internal structure of electronic equipment and compare and analyze it with a standard library to achieve accurate detection of abnormal components. This solves the shortcomings of existing security inspection technologies in detecting micro explosives and disguised devices, and improves the accuracy and efficiency of security inspection.

[0075] A segmentation group refers to a continuous group of regions formed by dividing the object under test along the second direction Z at different heights. Each segmentation group can contain one segmented region along the second direction, or it can contain multiple segmented regions arranged at discrete intervals along the second direction. The core of this division is that the height of the segmented region in the second direction matches the physical height of the detector receiving unit. This ensures that when the platform moves to the target position, all segmented regions within the same segment can simultaneously enter the multiple imaging areas corresponding to multiple detector receiving units and be completely covered by the receiving units. Through this division method, large-sized objects under test are decomposed into multiple independently scannable unit groups, significantly reducing the amount of data processed per scan and the space requirements of the equipment while maintaining high-resolution scanning.

[0076] Figure 2A A first structural diagram of a radiation scanning detection apparatus according to an embodiment of the present disclosure is shown schematically.

[0077] Figure 2B A schematic front view structural diagram of a radiation scanning detection apparatus according to an embodiment of the present disclosure is shown.

[0078] Figure 2C A schematic top view of a radiation scanning detection apparatus according to an embodiment of the present disclosure is shown.

[0079] like Figures 2A to 2C As shown, as a first aspect of this disclosure, a radiation scanning detection device is provided, comprising: a radiation source 8 for emitting a radiation beam; a platform 3 for loading a test object 200, the platform 3 being disposed on the emission side of the radiation source 8; and a detector 9 including a plurality of receiving units 91, the plurality of receiving units 91 being respectively configured to receive radiation emitted from the radiation source 8 and passing through the test object 200, the radiation source 8 and the detector 9 being disposed on opposite sides of the platform 3 in a first direction X, the plurality of receiving units 91 being arranged at intervals along a second direction Z at an angle to the first direction X; wherein, the scanning area s of the radiation received by the plurality of receiving units 91 is an imaging area S, the detector 9 being movable along the second direction Z to move the imaging area S to positions covering different segments of the test object 200, and the platform 3 being rotatable about a rotation axis T parallel to the second direction Z.

[0080] The radiation scanning detection equipment provided in some embodiments solves the problem that existing three-dimensional radiation scanning equipment requires a large structural volume and floor space for installation, making it unsuitable for traditional security inspection scenarios. In some embodiments, the radiation scanning detection equipment provides multiple receivers 91 arranged at intervals along the second direction Z. By dividing the object 200 under test into multiple segments and combining this with the function of the detector 9 moving along the second direction Z, the imaging area S can be moved to cover the segments to be detected. Simultaneously, by combining the rotation function of the platform 3, multi-angle projection data can be acquired by rotating the object 200 under test, thus completing the three-dimensional radiation scan. Using the detector 9's movement, the overall system can achieve scanning of relatively large objects under test. The object 200 is divided into multiple segments for separate 3D radiometric scanning data acquisition. This means that without using large 3D radiometric scanning equipment, the entire object 200 can be scanned in a short time. This significantly reduces the scanning range of a single 3D radiometric scan, reduces the size of the equipment and the required space, and reduces the amount of data processed per scan, while improving the equipment's performance tolerance. The acquired 3D radiometric scanning data can provide a rich information foundation for subsequent 3D image reconstruction. In some embodiments, the radiometric scanning detection equipment achieves efficient 3D radiometric scanning of the object 200 in security inspection scenarios through segmented scanning, solving the problem that existing radiometric scanning detection equipment in the security inspection field cannot detect minor modifications.

[0081] Specifically, in some 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, there are no specific restrictions on the selection of the radiation source 8. In some embodiments, the emission direction of the radiation source 8 is a first direction X, and the radiation source 8, the platform 3, and the detector 9 are arranged at intervals along the first direction X. In other embodiments, the emission direction of the radiation source 8 may also be set at a certain angle to the first direction X. In some embodiments, the platform 3 is a rotatable device used to support the object 200 to be measured. 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 used to receive rays passing through the object 200 under test. The detector 9 includes a plurality of receiving parts 91, which are arranged at intervals along the second direction Z. The detector 9 is a movable device. The scanning area s of the received rays by the plurality of receiving parts 91 forms an imaging area S. That is, the imaging area S includes a plurality of subdivided scanning areas s arranged at intervals along the second direction Z, which are used to scan a portion of the segmented area of ​​the object 200 under test.

[0082] Specifically, in some embodiments, when performing step-by-step scanning on the object under test 200, the object under test 200 is first divided into multiple detection regions with consecutive numbers at equal intervals along the second direction Z. The division interval is dynamically determined according to the physical arrangement characteristics of the receiving units 91. Based on the number K of the receiving units 91 distributed along the second direction Z, the multiple detection regions are reorganized into multiple discrete segments based on the number K and the distance between adjacent receiving units 91. The detector 9 is translated along the second direction Z by a distance of K times the basic spacing each time, so that the imaging area S covers each part of the same segment. The three-dimensional radiation scanning data of the detection area corresponding to the segment is acquired synchronously by rotating the object under test 200 through the carrier platform 3. In some exemplary embodiments, the ray beam is a conical ray beam. To ensure that the multiple segments of the object under test 200 can fall into the imaging area S during acquisition, a certain overlap rate can also be formed in the scanning area s of adjacent segments during scanning along the second direction Z, so as to achieve seamless fusion by using a phase matching algorithm during data reconstruction.

[0083] like Figures 2A to 2C As shown, according to some exemplary embodiments of the present disclosure, the distance between two adjacent receiving parts 91 is A, and the height of each receiving part 91 in the second direction Z is B, wherein A is a positive integer multiple of B, and the second direction Z is perpendicular to the first direction X.

[0084] In some embodiments of the radiation scanning detection device, the arrangement logic of the receivers 91 in the second direction Z is optimized by setting the spacing between adjacent receivers 91 to a positive integer multiple of the height of the receivers 91. This design ensures that during the movement of the detector 9, there are no gaps or overlaps between the imaging areas S formed by the detector 9 at different positions, maximizing the coverage of the X-ray beam, improving scanning efficiency and the continuity of data acquisition, avoiding scanning blind spots or redundant data caused by unreasonable arrangement, and also facilitating the subsequent stitching of multiple three-dimensional radiation scanning data, reducing the amount of data processing required for stitching.

[0085] In some exemplary embodiments, the height of the receiving unit 91 along the second direction Z is B, and the spacing A between adjacent receiving units 91 is set to be equal to B. In an embodiment with two segmented groups, when the X-ray beam is a straight beam, when the detector 9 is in the initial position, multiple receiving units 91 are arranged along the second direction Z, covering the first segmented group. During the first scan, the X-ray source 8 emits a X-ray beam that penetrates the object under test 200, and the receiving unit 91 collects the three-dimensional radiation data of the first segmented group. After completing the scan of the first segmented group, the detector 9 is driven to move along the second direction Z by a distance equal to the height B of one receiving unit 91. At this time, the multiple receiving units 91 of the detector 9 exactly fill the gap between the previously adjacent receiving units 91. At the moved position, the receiving unit 91 collects the three-dimensional radiation data of the second segmented group. Since the spacing and height are equal, the scanning range of the second segmented group is completely continuous with the scanning range of the first segmented group, without overlap or gaps.

[0086] like Figures 2A to 2C As shown, in the radiation scanning detection device provided according to the embodiments of this disclosure, the number of multiple receiving units 91 is determined based on the distance A between two adjacent receiving units 91, the height B of the receiving unit 91 in the second direction Z, and the range of the ray beam in the second direction Z, so as to arrange the maximum number of ray beams in the range of the second direction Z.

[0087] In some embodiments of the radiation scanning detection equipment, the number of receivers 91 is dynamically determined through comprehensive calculations based on the spacing, height, and beam range of the receivers 91. This approach ensures the maximum arrangement of receivers 91 within a limited beam range, improving equipment compactness and resource utilization. It is particularly suitable for space-constrained security inspection scenarios while reducing hardware costs.

[0088] In some exemplary embodiments, when the ray beam is a straight beam, the coverage area of ​​the ray in the second direction Z is fixed and defined. The spacing of the receiving units 91 needs to be dynamically adapted according to this range to maximize the arrangement of the number of receiving units 91. For example, the coverage area of ​​the ray beam in the second direction Z is a fixed value W, the height of the receiving unit 91 in the second direction Z is B, the spacing between adjacent receiving units 91 is A, and the number K of receiving units 91 is maximized so that the ray beam range W is completely covered by the receiving units 91. The number K of receiving units 91 is maximized under the condition that: K×B + (K-1)×A ≤W, where K is the largest integer satisfying the condition; that is, the maximum usable number is determined by ensuring that the sum of the coverage area and the spacing does not exceed the total length of the ray beam. In some optimized embodiments, A is a positive integer multiple of B. By moving the detector 9 for scanning, the entire ray beam range is ensured to be maximized, further saving costs and optimizing the layout. In embodiments where the X-ray beam is a cone-shaped beam, its coverage area expands with distance from the X-ray source 8. The parameters of the receiver 91 need to be dynamically adjusted based on the divergence angle and the distance between the receiver 91 and the X-ray source 8. For example, if the divergence angle of the X-ray beam is θ, the distance between the receiver 91 and the X-ray source 8 is D. Since the coverage area of ​​the cone-shaped beam in the second direction Z increases with distance, the number and arrangement of the receivers 91 need to be dynamically adjusted to adapt to the geometric characteristics of the cone-shaped beam, avoiding data truncation at the edges. This is suitable for security checks of large objects (such as suitcases) or irregular objects, ensuring complete coverage of the divergence area. Through dynamic adaptation and mobile scanning, complete data acquisition under complex geometric structures is ensured, improving detection efficiency and accuracy.

[0089] like Figures 2A to 2C As shown, in the radiation scanning detection device provided according to the embodiments of this disclosure, the distance A between two adjacent receiving units 91 is equal to the height B of the receiving unit 91 in the second direction Z.

[0090] In some embodiments of the radiation scanning detection device, the arrangement logic of the receivers 91 is simplified by setting the spacing and height of adjacent receivers 91 to be equal. This design reduces the complexity of device assembly while ensuring scanning continuity, and is suitable for standardized production and rapid maintenance scenarios. At the same time, setting the spacing and height of adjacent receivers 91 to be equal can reduce the number of times the detector 9 moves, so that the area within the X-ray beam range can be fully scanned with only one movement.

[0091] like Figures 2A to 2C As shown, according to the radiation scanning detection device provided in the embodiments of this disclosure, the detector 9 includes a plurality of linear array detectors, a plurality of receiving units 91 are respectively formed on the plurality of linear array detectors, and the plurality of linear array detectors are arranged at intervals along the second direction Z.

[0092] In some embodiments of the radiation scanning detection equipment, multiple independent linear array detectors are arranged at Z-intervals along a second direction, further optimizing the scanning coverage and resolution. Each linear array detector corresponds to a receiver 91. The modular design facilitates maintenance and upgrades. The receiver 91 is formed on the linear array detector, so when a linear array detector fails, it can be replaced individually without affecting the operation of the overall equipment.

[0093] like Figures 2A to 2C As shown, according to some exemplary embodiments of the present disclosure, the receiving unit 91 extends along a third direction Y to the boundary of the ray beam in the third direction Y, wherein the third direction Y is a direction perpendicular to the first direction X and perpendicular to the second direction Z.

[0094] In some embodiments of the radiation scanning detection equipment, the design of the receiving unit 91 extending along the third direction Y to the boundary of the radiation beam eliminates the problem of missing edge data caused by the positional offset or excessive size of the object under test 200. This ensures that when the object under test 200 is located within the radiation beam, the object under test 200 can fall within the scanning area s. The receiving unit 91 completely receives the radiation passing through the object under test 200 in the third direction Y, improving the integrity and consistency of the imaging data. This is suitable for detecting transportation vibrations or detecting objects with irregular shapes.

[0095] Specifically, in some embodiments, the second direction Z is set as a vertical direction, and the receiving unit 91 forms a continuously covering detection and receiving area in the third direction Y, that is, in the plane direction perpendicular to the first direction X and the second direction Z. This direction corresponds to the lateral extension dimension of the ray beam in the spatial coordinate system. Each receiving unit 91 extends along the third direction Y, and its length direction is parallel to the lateral divergence direction of the ray beam, so that the combined detection range of all receiving units 91 completely covers the effective irradiation area of ​​the ray beam in the third direction Y. When the platform 3 carries a large-sized object to be measured 200 or when an installation offset occurs, the extended structure of the receiving unit 91 ensures that the projection of the object to be measured 200 at any position in the third direction Y can be completely captured by at least one receiving unit 91, eliminating the edge data truncation phenomenon caused by insufficient detection width in traditional designs.

[0096] In some exemplary embodiments, that is, in the detection scenario where the mobile device moves each carrying platform 3 and the object under test 200 loaded on each carrying platform 3 to the detection device, when the object under test 200 is randomly offset in the third direction Y during transportation due to the error of the mobile device, the extended receiving unit 91 can still maintain complete data acquisition. It can also be used in conjunction with a sliding window-like data processing algorithm to effectively eliminate edge data fluctuations caused by vibration.

[0097] like Figures 2A to 2CAs shown, according to some exemplary embodiments of this disclosure, the object platform 3 includes: a first movable structure, which is movable along a third direction Y; and a second movable structure, which is movable along a second direction Z; the first and second movable structures are used to calibrate the position of the object 200 under test in the X-ray beam.

[0098] In some embodiments of the radiation scanning detection device, the position calibration of the object under test 200 in two directions is achieved by the structure of the object platform 3 moving in the second direction Z and the third direction Y. This design accurately compensates for the object placement deviation, ensures that its center is aligned with the center of the imaging area S, avoids projection distortion or data blurring caused by position offset, and improves the reliability of the detection results.

[0099] In some embodiments of the radiation scanning detection equipment, the position calibration capability of the platform 3 is improved by setting a first moving mechanism and a second moving mechanism. The first moving mechanism realizes the movement of the object under test 200 in the second direction Z, so that each segment of the object under test 200 can be quickly moved into the X-ray beam. Since the imaging accuracy of three-dimensional imaging is high, the position requirements of the object under test 200 are also relatively strict. If the position of the object under test 200 in the second direction Z is offset, it may cause blurring or missing images of some connecting areas. Furthermore, if the newly loaded object under test 200 has a deviation in the third direction Y, it will affect the accuracy of the detection results in the structural analysis of the imaging image. The second moving mechanism finely adjusts the position of the object under test 200 in the third direction Y to ensure that each segment of the object under test 200 is accurately aligned with the center of the imaging area S and that each segment is moved into the X-ray beam, avoiding blurring or missing data due to position offset.

[0100] In some embodiments, the first moving structure can drive the platform 3 to move along the second direction Z, so that each segment moves sequentially to the center of the X-ray beam, i.e., to the location with the best X-ray imaging effect. This allows both the detector 9 and the platform 3 to be moved and adjusted before scanning, improving the X-ray imaging quality. For example, after scanning the Nth segment is completed, the first moving structure drives the platform 3 to move along the second direction Z, and the second moving mechanism drives the platform 3 to move along the third direction Y, so that the (N+1)th segment and the imaging area S are precisely located at the center of the X-ray beam, obtaining the best imaging effect. This process can be quickly switched through programmed control.

[0101] In some embodiments, the platform 3 may be partially outside the X-ray beam before startup. The second moving structure drives the platform 3 to make fine adjustments along the third direction Y. Based on the difference between the actual position of the object under test 200 in the third direction Y and the theoretical position of the X-ray beam center, the offset is calculated, and the second moving structure is controlled to move along the third direction Y to compensate for the offset. In another embodiment, if the center of the object under test 200 deviates from the center of the imaging area S by 1 mm due to vibration during movement, the second moving structure will move 1 mm along the third direction Y to move the center of the object under test 200 back to the center of the X-ray beam, avoiding edge projection distortion or data loss.

[0102] like Figures 2A to 2C As shown, according to some exemplary embodiments of the present disclosure, the loading platform 3 includes a turntable, which is rotatably configured about its own rotation axis T parallel to the second direction Z, so that the radiation scanning detection device performs a three-dimensional radiation scan of the object 200 under test through the imaging area S.

[0103] In some embodiments of the radiation scanning detection equipment, the rotation of a turntable around a second direction Z-axis enables the acquisition of multi-angle projection data of the object under test (200°). This approach enriches the stereoscopic information of the 3D reconstruction, reduces the risk of misjudgment caused by a single viewpoint, and is particularly suitable for high-precision identification of electronic component solder joints or miniature foreign objects.

[0104] Specifically, in some embodiments, the turntable of the platform 3 is rotatably configured around its own rotation axis T parallel to the second direction Z, providing the possibility of multi-angle scanning for the detection of the object under test 200 in the imaging area S. In some embodiments, when the imaging area S covers the Nth segment of the object under test 200, the turntable can rotate at a set rotational angular velocity, allowing the Nth segment of the object under test 200 to receive X-ray scanning at different angles, thereby obtaining the three-dimensional radiometric scanning data of the Nth segment of the object under test 200. This multi-angle scanning method can acquire omnidirectional information of the Nth segment of the object under test 200, providing a rich data foundation for subsequent three-dimensional image reconstruction, making the detection results more accurate and comprehensive.

[0105] like Figures 2A to 2C As shown, according to some exemplary embodiments of the present disclosure, the detector 9 further includes: a third moving structure, which is movably disposed along the second direction Z, for driving the plurality of receiving units 91 of the detector 9 to move along the second direction Z.

[0106] In some embodiments of the radiation scanning detection device, a third moving structure drives the detector 9 to move along the second direction Z, enabling rapid movement of the imaging area S. Specifically, in some embodiments, the third moving structure drives the platform 3 to move along the second direction Z. The third moving structure moves in preset step sizes, allowing the imaging area S to sequentially cover each segment. For example, after scanning the Nth segment, the third moving structure moves the detector 9 by a distance, ensuring that the imaging area S of the detector 9 precisely covers the (N+1)th segment. This process can be rapidly switched through programmed control, ensuring that no segment is missed during scanning.

[0107] like Figures 2A to 2C As shown, according to some exemplary embodiments of this disclosure, detector 9 further includes:

[0108] The fourth moving structure is movably configured along the third direction Y to drive the multiple receiving units 91 of the detector 9 to move along the third direction Y, so as to move the imaging area S upward along the third direction Y.

[0109] In some embodiments of the radiation scanning detection device, the position of the detector 9 is adjusted along the third direction Y by the fourth moving structure, so as to achieve fine adjustment of the position of the imaging area S in the third direction Y. This avoids the imaging area S from failing to accurately cover the corresponding segment to be measured due to external vibration and equipment travel error, and is especially suitable for sudden positioning accuracy problems during long-stroke measurement movement.

[0110] Specifically, in some embodiments, the fourth moving structure drives the platform 3 to move slightly along the third direction Y. Based on the actual positions of the imaging area S and the segmented group to be detected in the third direction Y, the offset is calculated, and the fourth moving structure is controlled to move along the third direction Y to compensate for the offset. For example, if the imaging area S deviates from the center of the segmented group by 1 mm due to vibration when the detector 9 moves, the fourth moving structure will move 1 mm along the third direction Y to make the imaging area S cover the segmented group and avoid missing edge projection data.

[0111] like Figures 2A to 2C As shown, according to some exemplary embodiments of the present disclosure, the radiation scanning detection device further includes a controller; the controller is configured to: control the detector 9 to move along the second direction Z to the Nth position, the Nth position being the position of the detector 9 in the second direction Z when the imaging area S scans the Nth segment of the object under test 200; control the platform 3 to rotate, and trigger a plurality of receiving units 91 to collect three-dimensional radiation scanning data of the Nth segment of the object under test 200; wherein, N is a positive integer from 1 to M, and M is the total number of segments into which the object under test 200 is divided in the second direction Z.

[0112] In some embodiments of the radiation scanning detection equipment, the movement of the detector 9 and the rotation of the platform 3 are automatically controlled by a controller, achieving coordinated operation throughout the entire process. This solution reduces manual intervention, ensures the standardization and consistency of the scanning process, reduces human error, and improves the repeatability of detection results.

[0113] Specifically, in some embodiments, the controller dynamically calculates the total number of segmentation groups M based on the height of the object under test 200 in the second direction Z and the total coverage height of the imaging area S and the object under test 200 in the second direction Z, ensuring that the coverage of multiple segmentation groups completely covers the object under test 200. The total coverage height is the total height of the area of ​​the imaging area S covered by the X-ray beam scan of the object under test 200 in the second direction Z. For example, if the object under test 200 is a smartphone with a total height of 150 mm in the second direction Z and a total coverage height of 30 mm in the imaging area S, then the total number of segmentation groups M must satisfy M × 30 mm ≥ 150 mm, which means M = 5. In other embodiments, the calculation of the total number of segmentation groups is dynamically set according to the object under test 200 and the receiving unit 91, without specific limitations.

[0114] In some exemplary embodiments, during the scanning process, the controller first controls the third moving structure to move the imaging area S along the second direction Z to a position covering the corresponding first segment, triggering the turntable to rotate around the rotation axis T, and simultaneously activating the detector 9 to acquire multi-angle three-dimensional radiation data of the first segment; subsequently, the imaging area S is moved sequentially to cover the positions of the second to the Mth segment, and the rotation and data acquisition are repeated. After the radiation scan of all segment groups is completed, the controller uses an image alignment algorithm or other image processing methods to stitch the three-dimensional data of each segment group in the second direction Z order to eliminate misalignment between regions and form a complete three-dimensional radiation image, which is used to accurately identify the internal risk area 300 of the object under test 200.

[0115] In the risk identification phase: Through analysis and processing of the first radiation scan image, the control component can identify the risk area 300 of the object under test 200 according to preset algorithms and rules. In some embodiments, an image subtraction algorithm can be used to filter out the risk area 300. In other embodiments, an edge detection algorithm (such as the Canny operator) can be used to identify areas with abnormal density in the image and mark them as risk areas 300.

[0116] In some exemplary embodiments, the method for screening risk regions 300 includes steps S610 to S640:

[0117] Specifically, in step S610, the object to be tested 200 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.

[0118] As some possible implementation methods, features of the object under test 200 can be extracted, including but not limited to contour features, texture features, and density distribution features. Features corresponding to the object under test 200 can be extracted from the radiometric scan images of multiple standard objects in a standard library. The similarity between the features of the object under test 200 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 object under test 200 is used as the standard sample.

[0119] 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 the process of 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.

[0120] In step S630, the registered object to be tested 200 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 object to be tested 200 and the standard sample to obtain a binary image (mask), which is a white pixel (value 1) and a black pixel (value 0).

[0121] In step S640, 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.

[0122] Steps S610 to S640 facilitate automated confirmation of the presence of foreign objects in the acquired object 200, resulting in high detection efficiency. Specifically, precise image registration and subtraction calculations effectively identify foreign objects within the 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.

[0123] like Figures 2A to 2C As shown, according to some exemplary embodiments of the present disclosure, any one of the segmentation groups of the object under test 200 includes: a plurality of segmentation regions, the plurality of segmentation regions being spaced apart along the second direction Z, and the height of each segmentation region in the second direction Z being determined according to the height of the receiving unit 91 in the second direction Z.

[0124] In some embodiments of the radiation scanning detection equipment, by matching the height of the segmented area with the detection range of the receiver 91, noise interference caused by incomplete coverage or repeated scanning can be effectively reduced. At the same time, artifacts or breaks caused by area misalignment during data stitching are avoided, thereby significantly improving the accuracy and consistency of the three-dimensional reconstructed image and providing a highly complete data foundation for subsequent risk analysis.

[0125] Specifically, in some embodiments, each segment of the object under test 200 is further divided into multiple segmented regions spaced along the second direction Z. The height of each segmented region in the second direction Z is determined by the height of the receiving unit 91 in the second direction Z. Specifically, in some exemplary embodiments, when the X-ray beam is a parallel beam, if the height of the receiving unit 91 is H, the height of each segmented region is also set to H, so that when the detector 9 moves along the second direction Z, the imaging area S formed by the X-rays received by the receiving unit 91 can completely cover the corresponding segmented region. Through this design, multiple scan data can be directly stitched together, reducing the amount of data processing and improving detection efficiency. In other specific embodiments, in the scenario where the X-ray beam is a conical X-ray beam, the height of each segmented region in the second direction Z needs to be dynamically adjusted according to the divergence angle of the X-ray source 8 and the distance between the object under test 200 and the receiving unit 91. Due to the projection characteristics of the conical beam, the coverage height of the segmented region closer to the X-ray source 8 in the second direction Z is smaller, and the coverage height gradually increases on the side farther from the X-ray source 8, but the final projection height of all segmented regions does not exceed the height H of the receiving unit 91. Based on the beam divergence angle and the position of the object under test 200, the near and far heights of each segmented region are calculated to ensure that the seams between the scanned data of the final segmented regions are minimized during the stitching process. For example, when the object under test 200 moves along the second direction Z, the actual coverage height of the near segmented region is smaller than that of the far region due to the influence of the beam divergence angle. However, through dynamic division, the overlap range of the segmented regions can still be minimized and the coverage can be complete. This avoids incomplete data acquisition or excessive redundancy caused by the geometric characteristics of the cone beam, thereby reducing misalignment and artifacts during image stitching and significantly improving the integrity and accuracy of 3D reconstruction.

[0126] like Figures 2A to 2C As shown, according to some exemplary embodiments of the present disclosure, each segmented region further includes: a plurality of subdivided regions, the plurality of subdivided regions being arranged along a third direction Y, and the length of each subdivided region in the third direction Y being determined based on the length of the receiving unit 91 in the third direction Y.

[0127] In some embodiments of the radiation scanning detection device, by further subdividing the segmented area in the third direction Y, the size and specifications of the detector 9 of the radiation scanning detection device can be reduced, and the amount of data processed per cycle can be reduced. This makes it suitable for equipment deployment in security inspection scenarios. While reducing the complexity of the equipment, it ensures high-precision scanning effect and efficiency. Furthermore, in some embodiments of the radiation scanning detection device, by setting subdivided areas, the wider test object 200 in the third direction Y can be segmented for scanning processing, avoiding the inability to scan and identify the wider test object 200 in the third direction Y due to the limitation of the height and size of the receiving unit 91.

[0128] Specifically, in some embodiments, when the width of the object under test 200 in the third direction Y is large (such as an electronic device like a tablet computer), each segment can be further divided into multiple subdivided regions along the third direction Y according to the size of the receiving unit 91 to adapt to the coverage range of the receiving unit 91. For example, the width of the tablet computer in the third direction Y can be divided into multiple subdivided regions according to the effective detection length of the receiving unit 91 in the third direction Y. The total number of subdivided regions is calculated based on the total length of the object under test 200 in the third direction Y and the coverage length of a single subdivided region group. For example, if the object under test 200 is a tablet computer with a total length of 2000 mm in the third direction Y and a coverage length of 500 mm for a single subdivided region group, then the total number of subdivided regions O must satisfy O × 50 mm ≥ 2000 mm, which calculates to O = 4, that is, divided into 4 subdivided regions, covering 0-500, 500-1000, 1000-1500, and 1500-2000 mm. During scanning, the receiving unit 91 receives the imaging area S formed by the X-rays, which sequentially covers each 500 mm range, ensuring a seamless lateral coverage. This method dynamically divides the area to adapt to the detection needs of objects of different sizes, making it particularly suitable for high-resolution lateral detection of flat objects (such as LCD screens or circuit boards).

[0129] like Figures 2A to 2C As shown, according to some exemplary embodiments of this disclosure, the controller is further configured to: control the fourth moving structure to move along the third direction Y to the NP position, where the NP position is the position of the fourth moving structure in the third direction Y when the imaging area S covers the P subdivision region group of the Nth segment of the object under test 200; control the carrier platform 3 to rotate and trigger multiple receiving units 91 to collect three-dimensional radiometric scanning data of the P subdivision region group of the Nth segment of the object under test 200; wherein, P is a positive integer from 1 to 0, and 0 is the total number of subdivision region groups divided by the object under test 200 in the third direction Y, and the total number of subdivision region groups is determined according to the length of the object under test 200 in the third direction Y and the length of the subdivision region in the third direction Y.

[0130] In some embodiments of the radiation scanning detection device, the test object 200, which is wider in the third direction Y, is segmented for scanning, so as to avoid the inability to scan and identify the test object 200, which is wider in the third direction Y, due to the limitation of the height and size of the receiving unit 91.

[0131] In some exemplary embodiments, taking the Nth segmentation group divided into two subdivided regions as an example, the controller first controls the fourth moving structure to move the detector 9 to the subdivided region P=1 of the Nth segmentation group, completing the 3D scan of that region. Then, the controller moves the detector 9 along the third direction Y to the subdivided region P=2 of the Nth segmentation group to collect data for the remaining region. By sequentially scanning and stitching data, complete coverage of large-width objects is ensured, which is particularly suitable for detecting abnormal solder joints or battery packaging abnormalities on the internal circuit boards of tablet computers. This design improves local scanning resolution by subdividing the region along the third direction Y, avoiding edge data blurring caused by excessive width, and enhancing the ability to identify minute structural anomalies.

[0132] like Figures 2A to 2C As shown, according to some exemplary embodiments of this disclosure, the controller is further configured to: control the first moving structure to move a first position offset along a third direction Y, the first position offset being the distance between the object under test 200 and the ray beam in the third direction Y; and control the second moving structure to move a second position offset along a second direction Z, the second position offset being the distance between the object under test 200 and the ray beam in the second direction Z.

[0133] In some embodiments of the radiation scanning detection equipment, the precise alignment of the object under test 200 with the X-ray beam is ensured through real-time calculation and compensation of bidirectional positional offsets. This design eliminates measurement offsets caused by placement deviations, improves the accuracy of data acquisition, and is suitable for high-sensitivity detection scenarios.

[0134] In some embodiments, when the object under test 200 is placed on the platform 3, it may deviate from the center of the X-ray beam in the second direction Z and the third direction Y due to center of gravity shift or mechanical error. The controller can identify the position of the object under test 200 in the third direction Y and calculate its offset in the first direction X from the center of the X-ray beam; simultaneously, the controller identifies the position of the object under test 200 in the second direction Z and calculates its offset in the second direction Z from the center of the X-ray beam. The controller drives the first moving structure to move along the third direction Y to compensate for the offset in the first direction X, and drives the second moving structure to move along the second direction Z to compensate for the offset in the second direction Z, so that the geometric center of the object under test 200 precisely coincides with the center of the X-ray beam. For example, if the left edge of the object under test 200 exceeds the coverage area of ​​the X-ray beam due to tilting, the controller controls the movement of the object under test 200 along the third direction Y to move it to the right as a whole, while fine-tuning in the second direction Z to ensure that the object under test 200 is within the irradiation range of the X-ray beam. This design eliminates scanning distortion caused by object deformation or placement deviation through real-time dynamic compensation.

[0135] In some exemplary embodiments, a coordinate system is established with the first direction X, the second direction Z, and the third direction Y as three directions. The control component determines the position offset Δz = |zmax-z| or |zmin-z| based on the coordinates (x, y, z) of the edge point of the object under test 200 away from the ray beam and the boundary values ​​(zmin, zmax) of the ray beam in the third direction Y. Specifically, if the edge point of the object under test 200 away from the ray beam is close to the boundary zmax of the ray beam in the third direction Y, then the position offset Δz = |zmax-z|; if the edge point of the object under test 200 away from the ray beam is close to the boundary zmin of the ray beam 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 object under test 200 falls within the irradiation range of the ray beam.

[0136] like Figures 1A to 1B As shown, according to some exemplary embodiments of this disclosure, the object under test 200 includes electronic products.

[0137] Electronic products typically have complex internal structures, such as circuit boards and chips, which may pose safety hazards during production and use, such as the concealment of micro-explosives or illegal modifications. In response to these characteristics of electronic products, the radiation scanning detection equipment and the segmented scanning and stitching scanning mode provided in this disclosure can effectively detect minute abnormal structures within electronic products. Targeting the internal structural characteristics of electronic products (such as circuit boards and chips), the combined scanning mode and high-resolution imaging capabilities of this equipment can effectively detect micro-explosives or illegal modifications, filling the gaps in traditional security inspection technologies and overcoming the limitations of traditional security inspection technologies in detecting minute foreign objects, achieving comprehensive coverage of potential internal hazards in electronic products.

[0138] Specifically, in some embodiments, when the object under test 200 is an electronic product (such as a smartphone), the controller can further divide the internal components of the electronic product into multiple segments based on its internal components. Three-dimensional radiometric scanning is then performed using these multiple segments to achieve three-dimensional radiometric imaging of the corresponding specific area. This achieves a balance between scanning efficiency and scanning precision, enabling the radiometric scanning detection equipment provided in some embodiments to be applied to scenarios such as customs security inspection. For example, for the battery area segment of a smartphone, the stitched three-dimensional radiometric scan data can identify battery position displacement or abnormal shape; for the motherboard area segment of a mobile phone, the high-resolution stitched image after stitching the three-dimensional radiometric scan data can restore circuit board details and detect whether there are additional soldered microchips or circuit tampering.

[0139] like Figure 3 As shown, the second aspect of this disclosure provides a radiation scanning detection method, the method comprising operations S100 to S500:

[0140] In operation S100: the imaging area S is moved to the Nth position along the second direction Z perpendicular to the emission direction of the ray beam. The imaging area S is the scanning area s of the rays received by the plurality of receiving units 91. The plurality of receiving units 91 are arranged at intervals along the second direction Z. The Nth position is the position of the imaging area S in the second direction Z when it covers the Nth segment of the object under test 200. N is a positive integer from 1 to M, and M is the total number of segments of the object under test 200 divided in the second direction Z.

[0141] In operation S200: rotate the object under test 200 and acquire the three-dimensional radiometric scan data of the Nth segment of the object under test 200.

[0142] In operation S300: Repeat operation S100 to S200 until the three-dimensional radiometric scan data of the M segments of the object under test 200 are completed.

[0143] In operation S400: stitch together the three-dimensional radiometric scan data of the M segments of the object to be measured 200 to generate a three-dimensional radiometric scan image of the object to be measured 200.

[0144] In operation S500: Based on the three-dimensional radiometric scan image, determine the risk area 300 of the object under test 200.

[0145] The radiation scanning detection method provided in this embodiment reduces the complexity of single data processing by combining step-by-step movement of the imaging area S with rotational scanning. This scheme decomposes the detection task of large-sized objects into multiple local scans, improving real-time computing efficiency and making it suitable for resource-constrained embedded systems.

[0146] Taking radiation scanning detection of batteries as an example, the battery is first divided into multiple segments along the second direction Z. The height of each segment's segmentation region in the second direction Z is consistent with the height of each sub-imaging region S of the imaging area S in the second direction Z. The imaging area S initially covers the first segment (N=1), and the X-ray beam penetrates this area. The receiving unit 91 acquires multi-angle projection data of this segment. Subsequently, the imaging area S moves along the second direction Z to the next segment position (N=2), repeating the rotational scanning and data acquisition until all segments are covered. Each scan only needs to process the local data of the current segment, significantly reducing the computational load per scan. Finally, a 3D image stitching algorithm is used to align the scan data of each segment according to their spatial positions, generating a complete internal structure image of the battery, accurately identifying whether the electrodes have been modified, etc. This method achieves efficient and high-precision detection in resource-constrained systems through step-by-step scanning and dynamic stitching, avoiding the problem of large equipment size caused by large-scale data processing.

[0147] like Figure 4 As shown, according to some exemplary embodiments of this disclosure, before operation S100, the method further includes operations S010 to S040:

[0148] In operation S010: Based on the position of the object under test 200 in the third direction Y, which is perpendicular to the emission direction of the ray beam and perpendicular to the second direction Z, and the position of the ray beam in the third direction Y, determine the first position offset.

[0149] In operation S020: Move the object to be tested 200 along the third direction Y by a first position offset;

[0150] In operation S030: Determine the second position offset based on the position of the object under test 200 in the second direction Z and the position of the ray beam in the second direction Z;

[0151] In operation S040: Move the object to be tested 200 along the second direction Z by a second position offset.

[0152] The radiation scanning detection method provided in this embodiment eliminates the impact of initial position deviation on the overall data by performing second and third-direction Y-axis pre-calibration steps before scanning. This approach improves the consistency and accuracy of subsequent scanning data and avoids image stitching errors caused by initial offset.

[0153] In some exemplary embodiments, when the object under test 200 is misplaced, causing it to deviate from the center of the X-ray beam, the object under test 200 needs to be moved for pre-calibration. For example, if the object under test 200 is the battery area of ​​a laptop computer, and the initial position of the battery is offset to the right of the X-ray beam, the system calculates the lateral offset between the center of the battery area and the center of the X-ray beam by analyzing the density distribution of the pre-scan image. The laptop computer is then moved along a third direction (Y) until the center of the battery area is aligned with the center of the X-ray beam. This calibration eliminates projection distortion caused by the tilt of the object, ensuring accurate imaging of the distribution of battery electrodes and electrolyte in subsequent scans.

[0154] In some exemplary embodiments, before scanning begins, if the imaging area S deviates from the effective coverage area of ​​the X-ray beam in the second direction Z or the third direction Y, position calibration is required by moving the imaging area S. For example, when there is a misalignment between the X-ray beam and the imaging area S, the system can analyze the X-ray intensity distribution at the edge of the imaging area S based on the pre-scanned projection data to determine the direction and distance of the misalignment. In other embodiments, other methods can also be used to determine the direction and distance of the misalignment. Subsequently, the imaging area S moves along the second direction Z or the third direction Y until the imaging area S completely falls within the effective detection area of ​​the X-ray beam, ensuring complete acquisition of subsequent scan data.

[0155] In some exemplary embodiments, in complex scenarios, the positions of the object under test 200 and the detector 9 need to be adjusted collaboratively to achieve precise calibration. For example, when inspecting a long strip-shaped industrial part, if its first-end segment deviates from the center of the X-ray beam and the receiver 91 does not completely cover the X-ray beam, the system simultaneously moves the object under test 200 along the second direction Z so that its first-end segment aligns with the center of the X-ray beam, and finely adjusts the detector position along the third direction Y to adapt to the scanning range of the current segment. Through bidirectional collaborative calibration, it is ensured that each segment of the object under test 200 is located at the center of the X-ray beam during scanning, and the receiver 91 completely captures the projection data, avoiding splicing misalignment caused by accumulated errors, which is especially suitable for high-precision full-size inspection scenarios.

[0156] like Figure 5 As shown, according to some exemplary embodiments of this disclosure, the Nth slicing group includes O Pth subdivision regions divided in a third direction Y perpendicular to the emission direction of the ray beam and perpendicular to the second direction Z. Before operation S300, operation S200 includes operations S210 to S230:

[0157] In operation S210: the imaging area S is moved along the third direction Y to the NP position, where the NP position is the position of the imaging area S in the third direction Y when it covers the P subdivision group of the Nth segment of the object under test 200, P is a positive integer from 1 to 0, and 0 is the total number of subdivision groups of the object under test 200 in the third direction Y. The total number of subdivision groups is determined according to the length of the object under test 200 in the third direction Y and the length of the subdivision group in the third direction Y.

[0158] In operation S220: rotate the object under test 200 and acquire the three-dimensional radiometric scan data of the Pth subdivision group of the Nth segment of the object under test 200.

[0159] In operation S230: Repeat operations S210 to S220 until the three-dimensional radiometric scan data of all the Nth subdivision regions of the object under test 200 are completed.

[0160] Specifically, in some embodiments, when the width of the object under test 200 in the third direction Y exceeds the coverage of a single scan of the imaging area S, the segmentation group needs to be divided into multiple sub-region groups along the third direction Y. The width of each sub-region group is consistent with the effective detection length of the imaging area S in the third direction Y, ensuring seamless connection and no redundant coverage between adjacent region groups. In one specific embodiment, if the object under test 200 is a flat battery module, and its total width in the third direction Y is twice the coverage of the imaging area S, it is divided into two sub-region groups N1P1 and N1P2, corresponding to the left and right halves respectively. Through this division, the scanning range of each sub-region group strictly matches the capability of the imaging area S, avoiding edge data truncation or resolution reduction due to excessive width, which is especially suitable for detecting critical areas such as battery electrode modification.

[0161] In some exemplary embodiments, during operations S210 and S220, the imaging area S is aligned with the first segmentation group in the second direction Z, such as the top region of a battery module. The imaging area S scans along the third direction Y from the initial position N1P1, acquiring three-dimensional radiation data for the left half. After completing the N1P1 scan, the receiving unit 91 moves along the third direction Y to the next subdivided region group N1P2, covering the right half and acquiring data. For example, when inspecting a flexible circuit board, if its third direction Y is divided into three subdivided region groups, the receiving unit 91 moves sequentially from the left N1P1 to the middle N1P2 and the right N1P3, with each scan covering only the current subdivided region, ensuring complete imaging of lateral traces and solder joints. This step-by-step scanning method improves the resolution of complex structures through local high-precision data acquisition. All subdivided region groups N1P1 and N1P2 of the current longitudinal segmentation group N1 are completed. max After scanning, you can choose two movement paths to continue detection:

[0162] Path 1: The receiving unit 91 returns to the initial position N1P1 along the third direction Y, and then moves to the next longitudinal segment N2P1 along the second direction Z, and repeats the scanning sequence of the third direction Y. This path reduces splicing errors by fixing the scanning direction and is suitable for scenarios with strict accuracy requirements, such as internal testing of medical equipment.

[0163] Path 2: The receiving unit 91 moves directly along the second direction Z to the next longitudinal segmentation group N2P. max and from a third party to the Y-end N2P max Reverse scan to the starting position N2P1. For example, when inspecting an LCD panel, after completing the scan of the N1 subdivision group, directly move to the next subdivision region N2P. max and from N2P max The reverse scan to the left N2P1 improves detection efficiency by reducing idle travel time, making it suitable for high-volume, rapid inspection in industrial production lines. Both paths ensure full-coverage scanning of large objects while adapting to the efficiency and accuracy requirements of different scenarios.

[0164] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A radiation scanning detection device, characterized in that, The radiation scanning detection equipment includes: A radiation source, used to emit a beam of radiation; A loading platform for loading the object to be tested, wherein the loading platform is located on the emission side of the X-ray source; The detector includes multiple receiving units, each of which is configured to receive rays emitted from the ray source and passing through the object to be tested. The ray source and the detector are arranged on both sides of the platform in a first direction, and the multiple receiving units are arranged at intervals along a second direction at an angle to the first direction. The scanning area of ​​the rays received by the multiple receiving units is the imaging area. The detector is movable along the second direction to move the imaging area to cover different segments of the object under test. The platform is rotatable about a rotation axis parallel to the second direction.

2. The radiation scanning detection device according to claim 1, characterized in that, The distance between two adjacent receiving units is A, and the height of each receiving unit in the second direction is B, where A is a positive integer multiple of B, and the second direction is perpendicular to the first direction.

3. The radiation scanning detection device according to claim 2, characterized in that, The number of the plurality of receiving units is determined based on the spacing A between two adjacent receiving units, the height B of the receiving unit in the second direction, and the range of the ray beam in the second direction, so as to arrange the maximum number of ray beams in the range of the second direction.

4. The radiation scanning detection device according to claim 3, characterized in that, The distance A between two adjacent receiving units is equal to the height B of the receiving unit in the second direction.

5. The radiation scanning detection device according to claim 3 or 4, characterized in that, The detector includes multiple linear array detectors, and multiple receiving portions are formed on the multiple linear array detectors respectively. The multiple linear array detectors are arranged at intervals along the second direction.

6. The radiation scanning detection device according to claim 3 or 4, characterized in that, The receiving part extends along a third direction to the boundary of the ray beam in the third direction, wherein the third direction is a direction perpendicular to the first direction and perpendicular to the second direction.

7. The radiation scanning detection device according to claim 6, characterized in that, The cargo platform includes: A first movable structure is movably disposed along the third direction; A second movable structure is movably disposed along the second direction; The first moving structure and the second moving structure are used to calibrate the position of the object under test in the X-ray beam.

8. The radiation scanning detection device according to claim 3 or 4, characterized in that, The cargo platform includes: A turntable is rotatably configured about its own rotation axis parallel to the second direction, so that the radiation scanning detection device can perform three-dimensional radiation scanning on each segment of the object under test through the imaging area.

9. The radiation scanning detection device according to any one of claims 3, 4, or 7, characterized in that, The detector also includes: A third moving structure is movably disposed along a second direction and is used to drive the plurality of receiving parts of the detector to move along the second direction.

10. The radiation scanning detection device according to claim 9, characterized in that, The detector also includes: A fourth moving structure is movably disposed along the third direction, used to drive the plurality of receiving parts of the detector to move along the third direction, so as to move the imaging area upward along the third direction.

11. The radiation scanning detection device according to claim 10, characterized in that, The radiation scanning detection equipment also includes a controller; The controller is configured to: The detector is controlled to move along the second direction to the Nth position, where the Nth position is the position of the detector in the second direction when the imaging area scans the Nth segment of the object under test; The platform is controlled to rotate, and multiple receiving units are triggered to collect three-dimensional radiometric scan data of the Nth segment of the object under test. Where N is a positive integer from 1 to M, and M is the total number of segments into which the object to be tested is divided in the second direction.

12. The radiation scanning detection device according to claim 11, characterized in that, Any segment of the object under test includes: Multiple segmented regions are provided, and the multiple segmented regions are spaced apart along a second direction. The height of each segmented region in the second direction is determined according to the height of the receiving part in the second direction.

13. The radiation scanning detection device according to claim 12, characterized in that, Each of the aforementioned segmented regions further includes: Multiple subdivided regions are arranged along a third direction, and the length of each subdivided region in the third direction is determined according to the length of the receiving unit in the third direction.

14. The radiation scanning detection device according to claim 13, characterized in that, The controller is also configured to: The fourth moving structure is controlled to move along the third direction to the NP position, where the NP position is the position of the fourth moving structure in the third direction when the imaging area covers the P subdivision region group of the Nth segment of the object under test; The platform is controlled to rotate, and multiple receiving units are triggered to acquire three-dimensional radiometric scan data of the Pth subdivision region group of the Nth segment of the object under test. Where P is a positive integer from 1 to 0, and 0 is the total number of subdivision regions of the object under test in the third direction. The total number of subdivision regions is determined based on the length of the object under test in the third direction and the length of the subdivision regions in the third direction.

15. The radiation scanning detection device according to claim 11, characterized in that, The controller is also configured to: The first moving structure is moved by a first position offset along a third direction, where the first position offset is the distance between the object under test and the ray beam in the third direction. The second moving structure is controlled to move along the second direction by a second position offset, the second position offset being the distance between the object under test and the ray beam in the second direction.

16. The radiation scanning detection device according to claim 11, characterized in that, The object to be tested includes electronic products.

17. A radiation scanning detection method, characterized in that, The method includes: The imaging area is moved to the Nth position along a second direction perpendicular to the emission direction of the X-ray beam. The imaging area is the scanning area of ​​the X-rays received by a plurality of receiving units. The plurality of receiving units are arranged at intervals along the second direction. The Nth position is the position of the imaging area in the second direction when it covers the Nth segment of the object under test. N is a positive integer from 1 to M, and M is the total number of segments of the object under test in the second direction. Rotate the object under test and acquire three-dimensional radiometric scan data of the Nth segment of the object under test; Repeat the above operation until the three-dimensional radiometric scan data of the M segments of the object under test are completed; The three-dimensional radiometric scan data of the object under test are stitched together from M segments to generate a three-dimensional radiometric scan image of the object under test. Based on the three-dimensional radiometric scan image, the risk area of ​​the object under test is determined.

18. The radiation scanning detection method according to claim 17, characterized in that, The method further includes: The first position offset is determined based on the position of the object under test in a third direction that is perpendicular to the emission direction of the ray beam and perpendicular to the second direction, and the position of the ray beam in the third direction. Move the object under test along the third direction by the first position offset; The second position offset is determined based on the position of the object under test in the second direction and the position of the ray beam in the second direction; The object to be tested is moved along the second direction by the second position offset.

19. The radiation scanning detection method according to claim 17, characterized in that, The Nth segmentation group comprises O Pth subdivision regions divided upwards on a third direction perpendicular to the exit direction of the X-ray beam and perpendicular to the second direction. The process of rotating the object under test and acquiring the three-dimensional radiation scan data of the Nth segmentation group of the object under test includes... The imaging area is moved along the third direction to the NP position, wherein the NP position is the position in the third direction when the imaging area covers the P subdivision region group of the Nth segment of the object under test, P is a positive integer from 1 to 0, and 0 is the total number of subdivision region groups divided by the object under test in the third direction. The total number of subdivision region groups is determined according to the length of the object under test in the third direction and the length of the subdivision region in the third direction. Rotate the object under test and acquire three-dimensional radiometric scan data of the Pth subdivision region group of the Nth segment of the object under test; Repeat the above operation until the three-dimensional radiometric scan data of all the Nth subdivisions and Pth subdivisions of the object under test are completed.

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