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 linear array receiving part and an area array receiving part, the linear array receiving part and the area array receiving part are configured to receive rays emitted by the ray source respectively, the ray source and the detector are arranged on the two sides of the object carrying platform in the first direction, and the object carrying platform is rotatably arranged around the rotation axis parallel to the second direction; the problem that radiation scanning detection equipment in the existing security inspection field cannot detect tiny changes is solved.

Description

TECHNICAL FIELD

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

[0002] Currently, security inspection technology mainly relies on traditional X-ray radiation scanning detection devices. The traditional X-ray radiation scanning detection device generates an image by penetrating an object with rays, and can identify dangerous objects of a larger volume, such as regulated knives, guns and ammunition, and flammable and explosive objects. However, the spatial resolution thereof is usually in the order of millimeters, and it is difficult to detect micro or sheet explosive objects.

[0003] The traditional X-ray radiation scanning detection device is not suitable for detecting the authenticity of electronic products such as mobile phones, pagers, interphones, tablet computers, and notebook computers. Therefore, in the field of electronic product security inspection, there is no good detection method for the dangerous behavior of additional modification of electronic products, the addition of small chips in electronic products, the change of circuits, and / or the storage of a small amount of explosive in electronic products. Moreover, the detection method adopted by the traditional X-ray radiation scanning detection device has a complex algorithm, and requires a ray radiation image with high resolution and clear judgment to judge the authenticity and danger of the detected product, which requires high ray energy and dose. High ray energy and dose increase the detection cost and increase the difficulty of protection.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical solutions of the present disclosure, and for the convenience of understanding by those skilled in the art. The above technical solutions cannot be considered as known to those skilled in the art merely because they are described in the background section of the present disclosure. SUMMARY

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

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

[0007] a ray source for emitting a ray beam;

[0008] a carrier platform for loading an object to be detected, the carrier platform being arranged on the emission side of the ray source; and

[0009] a detector comprising a linear array receiving portion and a planar array receiving portion, the linear array receiving portion and the planar array receiving portion being configured to respectively receive rays emitted from the ray source, the ray source and the detector being arranged on both sides of the carrier platform in a first direction,

[0010] wherein a scanning area of the rays emitted from the ray source and received by the linear array receiving portion forms a first scanning area, a scanning area of the rays emitted from the ray source and received by the area array receiving portion forms a second scanning area, the object platform is movably arranged along a second direction perpendicular to the first direction to move a partial area of the object to be inspected through the first scanning area or to the second scanning area, and the object platform is rotatably arranged about a rotation axis parallel to the second direction.

[0011] According to an embodiment of the present disclosure, the detector comprises a linear array detector and an area array detector, the linear array receiving portion is formed on the linear array detector, and the area array receiving portion is formed on the area array detector.

[0012] According to an embodiment of the present disclosure, a pixel size of the area array receiving portion is smaller than a pixel size of the linear array receiving portion.

[0013] According to an embodiment of the present disclosure, the object platform comprises a turntable rotatably arranged about a rotation axis parallel to the second direction to enable the radiation scanning and detecting device to perform three-dimensional radiation scanning on the partial area of the object to be inspected in the second scanning area.

[0014] According to an embodiment of the present disclosure, the object platform further comprises a first moving mechanism movably arranged along the second direction to move the partial area of the object to be inspected from the first scanning area to the second scanning area, and a second moving mechanism movably arranged along a third direction perpendicular to the first direction and perpendicular to the second direction to calibrate a position of the partial area of the object to be inspected in the second scanning area.

[0015] According to an embodiment of the present disclosure, the radiation scanning and detecting device further comprises a control assembly;

[0016] The control assembly is configured to:

[0017] control the object platform to move along the second direction to enable the first scanning area to scan the entire area of the object to be inspected to obtain a first radiation scanning image;

[0018] identify a risk area of the object to be inspected according to the first radiation scanning image;

[0019] control the object platform to move along the second direction to place the risk area of the object to be inspected in the second scanning area; and

[0020] control the object platform to rotate to obtain a second radiation scanning image of the risk area of the object to be inspected.

[0021] According to an embodiment of the present disclosure, the control component is further configured to:

[0022] controlling the second moving mechanism to move a position offset in a third direction, the position offset being a distance between the risk region of the object to be detected and an edge of the second scanning region in the third direction, the position offset being determined according to positions of the edge of the object to be detected and the edge of the second scanning region in the third direction.

[0023] According to an embodiment of the present disclosure, the control component is configured to:

[0024] controlling the turntable to rotate around its rotation axis at a fixed rotation rate to obtain the first radiation scan image of the object to be detected, when the object platform moves in the second direction to make the rays of the first scanning region scan the whole region of the object to be detected.

[0025] According to an embodiment of the present disclosure, the control component is configured to:

[0026] controlling the turntable to rotate around its rotation axis to a first position, the first position being a rotation orientation that makes the object to be detected have a maximum projection area relative to the rays of the first scanning region; and

[0027] controlling the object platform to move in the second direction to make the object to be detected pass through the first scanning region to obtain the first radiation scan image.

[0028] According to an embodiment of the present disclosure, the object to be detected comprises an electronic product.

[0029] A second aspect of the present disclosure provides a radiation scan detection method, the method comprising:

[0030] moving the object to be detected in a second direction perpendicular to an exit direction of the ray beam to make the rays corresponding to the linear array detector scan the whole region of the object to be detected, to obtain a first radiation scan image of the object to be detected;

[0031] determining a risk region of the object to be detected according to the first radiation scan image;

[0032] moving the risk region of the object to be detected in the second direction to a scanning region of the rays corresponding to the area array detector;

[0033] rotating the object to be detected around its own rotation axis parallel to the second direction to obtain a second radiation scan image of the object to be detected.

[0034] According to an embodiment of the present disclosure, before the moving the risk region of the object to be detected into the scanning region of the corresponding linear array detector along the second direction, the method further comprises:

[0035] determining a position offset according to the risk region of the object to be detected, and a radiation range of the scanning region of the corresponding linear array detector in a third direction perpendicular to the emission direction of the ray bundle and perpendicular to the second direction; and

[0036] moving the object to be detected along the third direction by the position offset.

[0037] According to an embodiment of the present disclosure, the moving the object to be detected along the second direction perpendicular to the emission direction of the ray bundle further comprises:

[0038] rotating the object to be detected around its own rotation axis to a first position, the first position being a rotation orientation in which the object to be detected has a maximum projection area relative to the ray of the corresponding linear array detector; and

[0039] maintaining the object to be detected at the first position and moving the object to be detected along the second direction.

[0040] According to an embodiment of the present disclosure, the moving the object to be detected along the second direction perpendicular to the emission direction of the ray bundle further comprises:

[0041] continuously rotating the object to be detected around its own rotation axis at a rated speed; and

[0042] moving the object to be detected along the second direction while maintaining the rotation of the object to be detected. BRIEF DESCRIPTION OF DRAWINGS

[0043] The drawings described herein are for purposes of illustration only and are not intended to limit the scope of the present disclosure in any way. Additionally, the shapes and relative sizes of the components in the drawings are meant to be illustrative and not necessarily to scale, and are intended to assist in understanding the disclosure. Those skilled in the art will recognize that various modifications can be made to the embodiments described herein which will achieve the same results without departing from the scope of the present disclosure. In the drawings:

[0044] FIG. 1A structural diagram of some embodiments of the object to be detected for the radiation scanning detection device and method;

[0045] FIG. 1B structural diagram of some other embodiments of the object to be detected for the radiation scanning detection device and method;

[0046] FIG. 2A first structural diagram of the radiation scanning detection device of the present disclosure;

[0047] FIG. 2B Front view structural diagram of a radiation scanning detection device of the present disclosure;

[0048] FIG. 2C Top view structural diagram of a radiation scanning detection device of the present disclosure;

[0049] FIG. 3 Step flow chart of a radiation scanning detection method of the present disclosure;

[0050] FIG. 4 Supplementary step flow chart of a radiation scanning detection method of the present disclosure;

[0051] FIG. 5 Flow chart of some embodiments of step S100 of a radiation scanning detection method of the present disclosure;

[0052] FIG. 6 Flow chart of another embodiments of step S100 of a radiation scanning detection method of the present disclosure. DETAILED DESCRIPTION

[0053] In order to make the technical personnel in the art better understand the technical solutions in the present disclosure, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, not all. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the scope of protection of the present disclosure.

[0054] The terms used herein are only used to describe specific embodiments, and are not intended to limit the present disclosure. The terms "include", "contain" and the like used herein indicate the existence of the described features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0055] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have meanings consistent with the context of the present specification, and should not be interpreted in an idealized or overly formal manner.

[0056] In the event that a statement similar to "at least one of A, B, and C, etc." is used, it is generally intended that the inclusion of at least one of A, B, or C should be treated as an inclusive of A alone, B alone, C alone, or any combination of A, B, and / or C. In the event that a statement similar to "at least one of A, B, or C, etc." is used, it is generally intended that the inclusion of at least one of A, B, or C should be treated as an inclusive of A alone, B alone, C alone, or any combination of A, B, and / or C.

[0057] Specific embodiments of the present disclosure will be described in detail below, it should be noted that the embodiments described herein are only used for illustration and do not limit the present disclosure. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it is obvious to those skilled in the art that the present disclosure does not necessarily have to be implemented with these specific details. In other instances, well-known structures, materials or methods are not specifically described in order not to obscure the present disclosure.

[0058] Throughout the specification, reference to "one embodiment", "an embodiment", "one example" or "an example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the disclosure. Therefore, the appearance of the phrases "in one embodiment", "in an embodiment", "one example" or "an example" in various places throughout the specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics can be combined in any suitable

[0059] First, some technical terms involved in this paper are explained:

[0060] High-resolution imaging: High-resolution imaging is the key to ensure detection accuracy. Using high-quality X-ray sources and high-resolution detectors, combined with advanced CT imaging technology, it can generate clear internal images of the inspected object, making it possible to reveal small defects and abnormal structures. Compared with the millimeter-level detection accuracy of traditional security inspection equipment, the electronic product CT security inspection instrument can provide imaging accuracy of hundreds of microns, ensuring accurate reconstruction of the internal fine structure of electronic equipment, and thus improving the inspection accuracy.

[0061] Fast scanning: Fast scanning technology can significantly improve detection efficiency and reduce detection time. By optimizing the scanning path and data processing algorithm, high-quality scanning can be completed in a short time. If the CT security instrument adopts advanced fast scanning algorithm, it can complete CT scanning detection in 15-30 seconds, greatly improving the efficiency of detection.

[0062] Deep learning algorithm: Deep learning algorithm plays an important role in image recognition and classification. By training deep learning model, the structural features inside electronic devices can be accurately obtained. If the CT security instrument integrates deep learning algorithm, it can automatically identify and classify the internal structure of electronic devices and compare and analyze with the standard library. With the continuous accumulation of use data, the algorithm model can be iteratively upgraded to further improve the accuracy.

[0063] The radiation scanning detection device and method provided by the embodiments of the present disclosure adopt high-resolution X-ray CT imaging technology to realize high-precision non-destructive detection of the internal structure of electronic devices. Through advanced image processing and deep learning algorithm, the internal structure of electronic devices can be automatically identified and classified, and compared and analyzed with the standard library to realize accurate detection of abnormal components. The radiation scanning detection device and method of the embodiments of the present disclosure aim to solve the shortcomings of existing security technology in detecting small explosives and disguised devices, and improve the accuracy and efficiency of security.

[0064] FIG. 2A A first structure diagram of a radiation scanning detection device according to an embodiment of the present disclosure is schematically shown. FIG. 2B A front view structure diagram of a radiation scanning detection device according to an embodiment of the present disclosure is schematically shown. FIG. 2C A top view structure diagram of a radiation scanning detection device according to an embodiment of the present disclosure is schematically shown.

[0065] As shown in FIG. 2A to FIG. 2C As a first aspect of the present disclosure, a radiation scanning detection device is provided, which comprises: a ray source 8 for emitting a ray beam; a carrier platform 3 for loading a to-be-detected object 200, the carrier platform 3 being arranged on the exit side of the ray source 8; a detector 9 comprising a linear array receiving part 91 and a planar array receiving part 92, the linear array receiving part 91 and the planar array receiving part 92 being configured to receive the rays emitted from the ray source 8 respectively, and the ray source 8 and the detector 9 being arranged on both sides of the carrier platform 3 in a first direction X.

[0066] In some exemplary embodiments, the scanning area of the rays emitted from the ray source 8 and received by the linear array receiving portion 91 forms a first scanning area S1, the scanning area of the rays emitted from the ray source 8 and received by the area array receiving portion 92 forms a second scanning area S2, the object carrier platform 3 is movably arranged along a second direction Z perpendicular to the first direction X to move a partial area of the object to be detected 200 through the first scanning area S1 or to the second scanning area S2, and the object carrier platform 3 is rotatably arranged about a rotation axis N parallel to the second direction Z.

[0067] In the radiation scanning and detecting device provided by the embodiments of the present disclosure, the detector 9 composed of the linear array receiving portion 91 and the area array receiving portion 92 and the movable object carrier platform 3 realize the scanning mode of "rough first and then precise". In the actual detecting process, the first scanning area S1 corresponding to the scanning area of the linear array receiving portion 91 is used to quickly cover the whole area of the object to be detected 200, and the overall profile and the approximate internal structure information of the object can be obtained in a short time, which is used to preliminarily identify the risk area 300 in the object to be detected 200; the second scanning area S2 corresponding to the scanning area of the area array receiving portion 92 is used to perform high-precision scanning on the risk area 300, which can clearly present the microstructure and details inside the object, and provides a strong basis for accurately judging whether the object has safety hidden dangers. The movement and rotation design of the object carrier platform 3 makes the device can flexibly switch the scanning mode, improves the detection efficiency, and can also accurately position the specific area of the object to be detected 200 to the appropriate scanning position according to the actual detection requirement, thereby reducing unnecessary radiation dose and ensuring the safety and reliability of the detection process.

[0068] Specifically, in some embodiments, the radiation scanning detection device comprises a radiation source 8, a carrier platform 3 and a detector 9. In some embodiments, the radiation source 8 is an X-ray generator, and in other embodiments, there is no specific limitation on the selection of the radiation source 8. In some embodiments, the emission direction of the radiation source 8 is the first direction X, and the radiation source 8, the carrier platform 3 and the detector 9 are arranged in a spaced manner along the first direction X, and in other embodiments, the emission direction of the radiation source 8 can also be arranged at an angle with the first direction X. In some embodiments, the carrier platform 3 is a movable device for carrying the object to be detected 200, and the carrier platform 3 is arranged on the emission side of the radiation source 8, between the radiation source 8 and the detector 9. The detector 9 is used to receive the radiation passing through the object to be detected 200, and the detector 9 comprises a linear array receiving portion 91 and a planar array receiving portion 92, which are arranged in a spaced manner along the second direction Z. The scanning area corresponding to the linear array receiving portion 91 is the first scanning area S1, which mainly focuses on the preliminary and rapid scanning coverage of the object, and can quickly obtain the approximate internal information of the object, which is used to preliminarily judge whether the object has an abnormal area, while the second scanning area S2 corresponding to the planar array receiving portion 92 focuses on the high-precision scanning of the area that may have risks to obtain more detailed and accurate internal structure information.

[0069] In some embodiments, the carrier platform 3 is not only designed to move along the second direction Z perpendicular to the first direction X, but also can rotate around the rotation axis N parallel to the second direction Z. Such design enables the carrier platform 3 to flexibly move the partial area of the object through the first scanning area S1 or to the second scanning area S2 when carrying the object to be detected 200, thereby providing strong flexibility and adaptability for different types of detection requirements. In some embodiments, the carrier platform 3 drives the object to be detected 200 to move along the second direction Z, so that the object to be detected 200 moves into and out of the first scanning area S1 in one direction, i.e. the whole object to be detected 200 is scanned to obtain preliminary screening information. Further, after determining the risk area 300 of the object to be detected 200, the carrier platform 3 drives the object to be detected 200 to move along the second direction Z, so that the risk area 300 of the object to be detected 200 is moved into the second scanning area S2 to obtain accurate information. In addition, the carrier platform 3 also has a rotating mechanism, which can rotate around the rotation axis N parallel to the second direction Z, so that the object to be detected 200 rotates in the second scanning area S2, facilitating the radiation to perform multi-angle scanning on the risk area 300 of the object to be detected 200. In some embodiments, CT scanning can be performed on the object to be detected 200 when the object to be detected 200 moves in the first scanning area S1 along the second direction Z, and in other embodiments, DR scanning can also be performed on the object to be detected 200 when the object to be detected 200 moves in the first scanning area S1 along the second direction Z, so as to quickly obtain the preliminary screening data of the object to be detected 200.

[0070] As shown in FIG. 2B some embodiments of the present disclosure, the detector 9 comprises a linear array detector and a planar array detector, the linear array receiving portion 91 is formed on the linear array detector, the planar array receiving portion 92 is formed on the planar array detector, and the linear array detector and the planar array detector are arranged at intervals along the second direction Z.

[0071] In some embodiments of the radiation scanning detection device, the linear array receiving portion 91 and the planar array receiving portion 92 are integrated on independent linear array detectors and planar array detectors respectively, so that the device structure is more modularized, and the maintenance and upgrading are facilitated. The interval arrangement of the linear array detector and the planar array detector avoids the interference of the scanning area of the device; the interval arrangement of the linear array detector and the planar array detector along the second direction Z optimizes the scanning path and improves the switching efficiency of the scanning mode.

[0072] In some embodiments, the detector 9 comprises two independent components, i.e., the linear array detector and the planar array detector. The linear array receiving portion 91 is formed on the linear array detector, and the planar array receiving portion 92 is formed on the planar array detector. The two are arranged at intervals along the second direction Z, forming a spatial arrangement structure without interference between each other. At the same time, it is convenient to maintain and upgrade the detector 9. When one of the detectors fails or needs to be updated, it can be operated individually without affecting the normal work of the other detector, greatly improving the maintainability and scalability of the device.

[0073] As shown in FIG. 2B some embodiments of the present disclosure, the pixel size of the planar array receiving portion 92 is smaller than the pixel size of the linear array receiving portion 91.

[0074] The radiation scanning detection device provided by some embodiments can process less data amount per unit time during the movement by using the linear array receiving portion 91 with larger pixel size, so as to realize higher scanning efficiency and comprehensively scan the object 200 in a shorter time. After determining the risk area 300 of the object 200, the planar array receiving portion 92 with smaller pixel size can significantly improve the imaging resolution of the second scanning area S2, so as to detect the fine structure of the micro explosive or the internal modification of the electronic device, i.e., to finely image the risk area 300.

[0075] Specifically, in some embodiments, the pixel size of the linear array receiver 91 is relatively larger than the pixel size of the area array receiver 92. In one specific embodiment, the pixel size of the linear array receiver 91 is 1mm × 1mm, which is suitable for fast scanning; the pixel size of the area array receiver 92 is 0.1mm × 0.1mm, which is suitable for high-precision imaging. In other embodiments, there are no specific limitations on the specific pixel size of the area array receiver 92 and the specific pixel size of the linear array receiver 91.

[0076] like FIG. 2B As shown, according to a specific embodiment of the present disclosure, the loading platform 3 includes a turntable 31, which is rotatably disposed about a rotation axis N parallel to the second direction Z, so that the radiation scanning detection device performs a three-dimensional radiation scan of the risk area 300 of the object under test 200 in the second scanning area S2.

[0077] In some embodiments of the radiation scanning detection equipment, the risk area 300 of the object under test 200 can be scanned from multiple angles by using the rotation function of the turntable. Combined with the high resolution setting of the area array detector, a three-dimensional radiation scanning image can be generated, accurately restoring the internal structure of the risk area 300 and improving the accuracy of anomaly detection.

[0078] Specifically, in some embodiments, the turntable of the platform 3 is rotatably configured around its own rotation axis N parallel to the second direction Z, providing the possibility of multi-angle scanning for the detection of the object 200 in the first scanning area S1 and / or the second scanning area S2. In one specific embodiment, when the risk area 300 of the object 200 enters the second scanning area S2, the turntable can rotate at a set rotational angular velocity, allowing the risk area 300 of the object 200 to be scanned by the area array detector at different angles. This multi-angle scanning method can acquire omnidirectional information of the object's risk area 300, providing a rich data foundation for subsequent 3D image reconstruction, making the detection results more accurate and comprehensive.

[0079] According to a specific embodiment of this disclosure, the loading platform 3 further includes a first moving mechanism and a second moving mechanism. The first moving mechanism is movable along the second direction Z to move a local area of ​​the object to be tested 200 from the first scanning area S1 to the second scanning area S2. The second moving mechanism is movable along a third direction Y perpendicular to the first direction X and perpendicular to the second direction Z to calibrate the position of the local area of ​​the object to be tested 200 in the second scanning area S2.

[0080] In some embodiments, the first moving mechanism can drive the whole object 200 to pass through the first scanning area S1, and at the same time, drive the object 200 to quickly switch positions between the first scanning area S1 and the second scanning area S2, that is, drive the risk area 300 of the object 200 to move along the second direction Z to the second scanning area S2, so as to quickly switch the scanning areas. Since the imaging accuracy of the area array detector is high, the position requirement for the object is also relatively strict. If the position of the object deviates, the imaging of some areas may be blurred or missing, thereby affecting the accuracy of the detection result. By movably arranging the second moving mechanism along the third direction Y, the position of the object 200 along the third direction Y can be finely adjusted, so as to accurately align the risk area 300 with the center of the area array detector, and avoid imaging errors caused by position deviation.

[0081] In some embodiments, the first moving mechanism is movably arranged along the second direction Z, and is used to drive the local area of the object 200 to quickly move from the first scanning area S1 to the second scanning area S2, so as to quickly switch between different scanning modes. At the same time, the first moving mechanism can also drive the object 200 to move along a direction into and out of the first scanning area S1, that is, to scan the whole object 200. In some embodiments, the second moving mechanism is movably arranged along the third direction Y, and is used to drive the object 200 to move along the third direction Y, so that the local position of the object 200 enters the second scanning area S2. In some embodiments, the second moving mechanism drives the risk area 300 of the object 200 to accurately align with the center position of the area array detector, so as to create good conditions for high-precision three-dimensional scanning. Through the cooperative work of the two moving mechanisms, the position adjustment of the object 200 during the detection process is more flexible, and the position adjustment of the object 200 is more accurate, so as to meet the needs of different detection scenarios.

[0082] According to a specific embodiment of the present disclosure, the radiation scanning detection device further comprises a control assembly. The control assembly is configured to: control the carrier platform 3 to move along the second direction Z, so that the first scanning area S1 radiates and scans all areas of the object 200 to obtain a first radiation scanning image; identify the risk area 300 of the object 200 according to the first radiation scanning image; control the carrier platform 3 to move along the second direction Z, so as to place the risk area 300 of the object 200 in the second scanning area S2; and control the carrier platform 3 to rotate, so as to obtain a second radiation scanning image of the risk area 300 of the object 200.

[0083] In a conventional detection process, manual operation of multiple devices is often required, and complex parameter settings and position adjustments are needed, which is not only inefficient, but also prone to human error. In the radiation scanning detection device provided in some embodiments of the present disclosure, by setting the configuration program of the control assembly, automation is achieved from the rapid preliminary screening scan to the full-process control automation of higher-precision re-inspection, reducing manual intervention, improving detection efficiency and consistency, and ensuring the accuracy of the operation process of the radiation scanning detection device.

[0084] In some specific embodiments, the control assembly can include a programmable logic controller and an image processing unit, and the workflow of the control assembly is as follows.

[0085] In the preliminary screening stage: the control assembly controls the carrier platform 3 to move at a constant speed along the second direction Z, so that the rays of the first scanning area S1 can fully scan the entire area of the object to be detected 200, and the linear array receiving portion 91 can receive the rays of the first scanning area S1, thereby obtaining a first radiation scan image.

[0086] In the risk identification stage: through analysis and processing of the first radiation scan image, the control assembly can identify the risk area 300 of the object to be detected 200 according to a preset algorithm and rule. In some embodiments, an image subtraction algorithm can be used to screen out the risk area 300, and in other embodiments, an edge detection algorithm (such as a Canny operator) can also be used to identify the area with abnormal density in the image and mark it as the risk area 300.

[0087] In some example embodiments, the method of screening the risk area 300 includes steps S610 to S640:

[0088] Specifically, in step S610, the object to be detected 200 is matched with the radiation scan images of a plurality of standard objects in a standard library, and the radiation scan image of the standard sample with the highest matching degree is taken as the standard sample, wherein the standard library is pre-constructed and pre-stored with the radiation scan images of a plurality of standard objects.

[0089] As some possible implementation methods, the features of the object to be detected 200 can be extracted, including but not limited to contour features, texture features, and density distribution features, etc. The features of the radiation scan images of the plurality of standard objects in the standard library corresponding to the object to be detected 200 can be extracted. The similarity between the object to be detected 200 and the features of the radiation scan images of each standard object is calculated, and the radiation scan image of the standard object with the highest similarity to the object to be detected 200 is taken as the standard sample.

[0090] In step S620, the object to be tested 200 is registered with the standard sample. The registration of the object to be tested 200 with the standard sample can be understood as a 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 consistent as possible in geometry.

[0091] 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 area. In some examples, the registered object to be tested 200 and the standard sample are subjected to pixel-level difference operation, and a binary image (mask) can be obtained. The binary image is a white pixel (value 1) and a black pixel (value 0).

[0092] In step S640, based on the mask of the foreign object area, the foreign object in the object to be tested is identified. The white pixel of the binary image can represent the possible foreign object area, and the black pixel can represent the background or the non-difference area. Therefore, based on the mask of the foreign object area, the foreign object in the object to be tested can be identified.

[0093] Through steps S610-S640, it is convenient to automatically determine whether there is a foreign object in the corresponding object to be tested based on the obtained object to be tested 200, and the detection efficiency is high. Through accurate image registration and subtraction calculation, the foreign object in the object to be tested can be effectively identified, and the detection accuracy is high. Based on this, the control method of the present disclosure can be widely applied to product quality detection and safety detection fields.

[0094] Positioning risk area 300 stage: the control assembly further controls the movement of the object carrier platform 3 along the second direction Z to accurately position the risk area 300 of the object to be tested 200 in the second scanning area S2 for high-precision three-dimensional scanning.

[0095] In the three-dimensional radiation scanning stage, the control assembly controls the rotation of the object carrier platform 3, and the area array receiver 92 receives the rays of the second scanning area S2 and collects multi-angle ray projection data to obtain a second radiation scan image of the risk area 300 of the object to be tested 200, providing a data basis for subsequent three-dimensional image reconstruction and anomaly analysis.

[0096] According to a specific embodiment of the present disclosure, the control assembly is further configured to control the second moving mechanism to move a position offset along the third direction Y, the position offset being the distance between the risk area 300 of the object to be tested 200 and the edge of the second scanning area S2 in the third direction Y, and the position offset being determined according to the positions of the edge of the object to be tested 200 and the edge of the second scanning area S2 in the third direction Y.

[0097] In the radiation scanning detection device provided in some embodiments, the risk area 300 is effectively prevented from being partially located outside the scanning range of the area array detector by automatically and accurately calculating the position offset and controlling the second moving mechanism to fine-tune. In actual detection, due to the different shapes, sizes of the object to be detected 200 and the position of the risk area 300, if the object is not accurately positioned, part of the risk area 300 may not be completely scanned by the area array detector, resulting in the risk of missed detection. Through the accurate calculation and control of the control assembly, it is ensured that the risk area 300 is completely within the effective scanning range of the area array detector, avoiding the situation of partial area missed detection, and further improving the accuracy and reliability of detection. This accurate positioning control method enables the device to adapt to various complex shapes and different sizes of the object to be detected 200.

[0098] Specifically, in some embodiments, a coordinate system is established in the first direction X, the second direction Z and the third direction Y, and the control assembly determines the position offset Ay = |ymax-y| / |ymin-y| according to the coordinates (x, y, z) of the edge point of the risk area 300 away from the second scanning area S2 in the first radiation scan image and the boundary values (ymin, ymax) of the second scanning area S2 in the third direction Y. If the edge of the risk area 300 away from the second scanning area S2 is close to the boundary ymax of the second scanning area S2 in the third direction Y, the position offset Ay = |ymax-y|; if the edge of the risk area 300 away from the second scanning area S2 is close to the boundary ymin of the second scanning area S2 in the third direction Y, the position offset Ay = |ymin-y|. The second moving mechanism is controlled to move Ay along the third direction Y, so that the risk area 300 is aligned with the area array receiving portion 92.

[0099] According to a specific embodiment of the present disclosure, the control assembly is configured to control the turntable to rotate at a fixed rotation rate about its rotation axis N when the object carrying platform 3 moves along the second direction Z to make the first scanning area S1 radiate the entire area of the object to be detected 200, so as to obtain the first radiation scan image of the object to be detected 200.

[0100] In the radiation scanning detection device provided in some embodiments, the object to be detected 200 is rotated synchronously in the preliminary screening stage to realize spiral scanning, so that multi-angle projection data can be obtained, the accuracy of risk area 300 identification is improved, and misjudgment caused by object posture is reduced. While realizing high-efficiency and high-speed preliminary screening, the data information richness in the preliminary screening process is improved.

[0101] In some embodiments, when the control assembly controls the carrier platform 3 to move in the second direction Z so that the rays of the first scanning region S1 scan the whole region of the object 200 under test, the control assembly simultaneously controls the turntable to rotate at a fixed rotation rate about its rotation axis N. This way of synchronous rotation enables the object 200 under test to present different angles during the scanning process, so as to obtain multi-angle projection data. For example, when the control assembly controls the carrier platform 3 to move in the second direction Z so that the rays of the first scanning region S1 scan the whole region of the object 200 under test, the control assembly simultaneously controls the turntable to rotate at a first rotation rate about its rotation axis N, so as to obtain a first radiation scanning image in the form of spiral scanning. When the risk region 300 of the object 200 under test enters the second scanning region S2, the turntable can rotate at a second rotation rate according to the setting. By setting the first rotation rate and the second rotation rate, the screening speed can be improved, and imaging data of different angles can be obtained at the same time.

[0102] In some embodiments, when the control assembly controls the carrier platform 3 to move in the second direction Z at a first rate so that the rays of the first scanning region S1 scan the whole region of the object 200 under test, and the control assembly simultaneously controls the turntable to rotate at a fixed rotation rate about its rotation axis N, that is, in the process of spiral scanning, the rays of the first scanning region S1 can scan the object 200 under test in the form of DR scanning. In other embodiments, when the control assembly controls the carrier platform 3 to move in the second direction Z at a second rate so that the rays of the first scanning region S1 scan the whole region of the object 200 under test, that is, in the process of moving scanning, the rays of the first scanning region S1 can scan the object 200 under test in the form of DR scanning. By setting the first rate and the second rate, the screening speed can be improved, and the screening accuracy can be ensured at the same time.

[0103] In other embodiments, when the control component controls the platform 3 to move along the second direction Z, so that the rays of the first scanning area S1 scan the entire area of ​​the object under test 200, the rays of the first scanning area S1 can also scan the object under test 200 in the form of CT scanning. For example, when the rays of the first scanning area S1 scan a certain area of ​​the object under test 200, the turntable rotates around its rotation axis N at a third rotation speed. After the rays of the first scanning area S1 have completed scanning a certain area of ​​the object under test 200, the object under test 200 moves so that another area of ​​the object under test 200 falls into the first scanning area S1. Similarly, the turntable rotates around its rotation axis N at a third rotation speed to complete the coarse CT scan of the object under test 200. At the same time, during the fine scan, when the rays of the first scanning area S1 scan the risk area 300 of the object under test 200, the turntable rotates around its rotation axis N at a fourth rotation speed. The third rotation speed can be greater than the fourth rotation speed, so that both the initial screening scan speed and the scanning accuracy can be improved.

[0104] According to a specific embodiment of this disclosure, the control component is configured to: control the turntable to rotate about its rotation axis N to a first position, the first position being the rotational orientation that allows the object under test 200 to have the maximum projected area relative to the rays of the first scanning area S1; and control the carrier platform 3 to move along the second direction Z so that the object under test 200 passes through the first scanning area S1 to obtain a first radiation scan image.

[0105] In some embodiments of the radiation scanning detection device, by rotating the object under test 200 to the orientation of the maximum projected area relative to the rays for scanning, the imaging range of the linear array detector can be maximized, resulting in clearer imaging information, greater distance between adjacent components, and improved identification accuracy of the risk area 300.

[0106] Specifically, in some embodiments, the control component can determine the contour of the object under test 200 through pre-scanning and calculate the angle θ between its major axis direction and the ray emission direction. Subsequently, the platform 3 is controlled to rotate by an angle θ so that the major axis of the object under test 200 is perpendicular to the ray beam. As a result, when the platform 3 moves along the second direction Z, the linear array receiver 91 can increase the spacing between adjacent components in the scanned image during scanning, which facilitates the determination of the risk area 300.

[0107] like FIG. 1A to FIG. 1B As shown, in one specific embodiment of this disclosure, the object to be tested 200 includes an electronic product.

[0108] Electronic products usually have complex internal structures, such as circuit boards, chips and other small components, which may have some security risks during production and use, such as hidden micro-explosives or illegal modifications. In view of these characteristics of electronic products, some embodiments provide a radiation scanning detection device and a combined scanning mode adopted by the device, which can effectively detect the micro-abnormal structure inside the electronic product. In view of the internal structure characteristics of the electronic product (such as circuit boards, chips, etc.), the combined scanning mode and high-resolution imaging capability of the device can effectively detect micro-explosives or illegal modifications, filling the gap of traditional security technology.

[0109] Specifically, in some embodiments, taking a smartphone as an example, the first radiation scanning image of the linear array receiving part 91 can quickly identify the position abnormalities of large components such as batteries and mainboards, such as whether the components such as batteries and mainboards are displaced, deformed, etc.; The second radiation scanning image of the area array receiving part 92 can go deep into the micro level of the internal structure of the electronic product and find additional microchips welded on the circuit board or powder explosives hidden in the battery, etc.

[0110] As shown in FIG. 3 As a second aspect of the present disclosure, a radiation scanning detection method is provided, which comprises steps S100-S400.

[0111] In step S100, the object to be measured 200 is moved in the second direction Z perpendicular to the emission direction of the ray beam, so that the ray corresponding to the linear array detector scans the entire region of the object to be measured 200, and the first radiation scanning image of the object to be measured 200 is obtained.

[0112] In step S200, the risk area 300 of the object to be measured 200 is determined according to the first radiation scanning image.

[0113] In step S300, the risk area 300 of the object to be measured 200 is moved to the scanning area of the ray corresponding to the area array detector in the second direction Z.

[0114] In step S400, the object to be measured 200 is rotated around its rotation axis N parallel to the second direction Z, and the second radiation scanning image of the object to be measured 200 is obtained.

[0115] In some embodiments of the radiation scanning detection method, the "initial screening-location-detailed scanning" process significantly reduces the amount of data processing while improving the accuracy and efficiency of detecting risk areas 300. In traditional detection methods, if minor modifications to electronic devices need to be inspected, extensive data acquisition and processing of the entire object is often required, such as a CT scan of the entire object 200. This is not only inefficient and requires large scanning equipment, but also easily affected by various interference factors, leading to inaccurate detection of risk areas 300.

[0116] Specifically, in some embodiments of this disclosure, the detection method first uses a linear array detector for rapid initial screening to obtain approximate internal information of the object, and then uses image processing algorithms to determine the risk area 300, greatly reducing the amount of data required for subsequent high-precision detection. In the high-precision detection stage, a planar array detector performs multi-angle scanning of the risk area 300 to obtain high-quality three-dimensional radiometric scan data, improving the accuracy of risk area 300 detection. This optimized detection process not only improves detection efficiency but also ensures the accuracy and reliability of the detection results.

[0117] like FIG. 4 As shown, according to a specific embodiment of this disclosure, the method may further include steps S210 to S220 before moving the risk region 300 of the object to be tested 200 along the second direction Z to the scanning region of the ray of the corresponding area array detector.

[0118] In step S210, the position offset is determined based on the risk area 300 of the object under test 200 and the radiation range of the scanning area of ​​the corresponding area array detector in the third direction Y, which is perpendicular to the emission direction of the ray beam and perpendicular to the second direction Z.

[0119] In step S220, the object to be tested 200 is moved by a position offset along the third direction Y.

[0120] In actual detection, the risk area 300 of the object under test 200 may have a certain positional deviation. If it is directly moved to the scanning area of ​​the area array detector, some areas may not be effectively scanned, or imaging distortion may occur. However, by pre-calculating the positional offset and making fine adjustments, the risk area 300 can be accurately aligned with the center of the area array detector, ensuring the acquisition of high-quality imaging data. In some embodiments of the radiation scanning detection method, fine-tuning in the third direction Y ensures that the risk area 300 is in the optimal position within the scanning range of the area array detector, avoiding edge distortion or missed scans of some areas.

[0121] Specifically in some embodiments, by analyzing the coordinate information of the risk area 300 in the first radiation scan image, combined with the scanning range boundary value of the area array detector in the third direction Y, the position offset of the object 200 to be detected along the third direction Y is calculated. The position offset can ensure that the risk area 300 of the object 200 to be detected can be in the best scanning position after moving to the scanning area of the area array detector.

[0122] As shown in FIG. 1, according to a specific embodiment of the present disclosure, the object 200 to be detected is moved along the second direction Z perpendicular to the emission direction of the ray beam, and the method further comprises the following steps: S110: rotating the object 200 to be detected around its own rotation axis N to a first position, the first position being a rotation position at which the object 200 to be detected has the maximum projection area relative to the rays of the corresponding linear array detector; and S120: keeping the object 200 to be detected at the first position and moving it along the second direction Z. FIG. 5 As shown in FIG. 1, according to a specific embodiment of the present disclosure, the object 200 to be detected is moved along the second direction Z perpendicular to the emission direction of the ray beam, and the method further comprises the following steps: S110: rotating the object 200 to be detected around its own rotation axis N to a first position, the first position being a rotation position at which the object 200 to be detected has the maximum projection area relative to the rays of the corresponding linear array detector; and S120: keeping the object 200 to be detected at the first position and moving it along the second direction Z.

[0123] As shown in FIG. 1, according to a specific embodiment of the present disclosure, the object 200 to be detected is moved along the second direction Z perpendicular to the emission direction of the ray beam, and the method further comprises the following steps: S110: rotating the object 200 to be detected around its own rotation axis N to a first position, the first position being a rotation position at which the object 200 to be detected has the maximum projection area relative to the rays of the corresponding linear array detector; and S120: keeping the object 200 to be detected at the first position and moving it along the second direction Z.

[0124] As shown in FIG. 1, according to a specific embodiment of the present disclosure, the object 200 to be detected is moved along the second direction Z perpendicular to the emission direction of the ray beam, and the method further comprises the following steps: S110: rotating the object 200 to be detected around its own rotation axis N to a first position, the first position being a rotation position at which the object 200 to be detected has the maximum projection area relative to the rays of the corresponding linear array detector; and S120: keeping the object 200 to be detected at the first position and moving it along the second direction Z.

[0125] FIG. 6 FIG. 1A FIG. 1B FIG. 2A FIG. 2B FIG. 2C FIG. 3 FIG. 4 As shown in FIG. 1, according to a specific embodiment of the present disclosure, the object 200 to be detected is moved along the second direction Z perpendicular to the emission direction of the ray beam, and the method further comprises the following steps: S110: rotating the object 200 to be detected around its own rotation axis N to a first position, the first position being a rotation position at which the object 200 to be detected has the maximum projection area relative to the rays of the corresponding linear array detector; and S120: keeping the object 200 to be detected at the first position and moving it along the second direction Z.

[0126] For some objects with complex internal structures or hidden abnormal objects, single-angle scanning may miss some abnormal objects or misjudge some abnormal objects. Multi-angle scanning can clearly present the subtle changes in the internal structure of the object, and improve the reliability of the risk area 300 identification. The radiation scanning detection method provided by some embodiments rotates the object 200 to be detected synchronously during the movement, can obtain multi-angle projection data in real time, improves the comprehensiveness of the preliminary screening image, and reduces the risk of missing detection caused by a single object posture.

[0127] ​The above describes embodiments of the present disclosure. However, these embodiments are merely for illustrative purposes, and are not intended to limit the scope of the present disclosure. Although each embodiment is described above separately, this does not mean that the measures in each embodiment cannot be used advantageously in combination. Those skilled in the art can make various substitutions and modifications without departing from the scope of the present disclosure, and these substitutions and modifications should all fall within the scope of the present disclosure.

Claims

1. A radiation scanning inspection apparatus, characterized by, The radiation scanning detection device comprises: a radiation source for emitting a radiation beam; a carrier platform for loading an object to be detected, the carrier platform being arranged on the emission side of the radiation source; and a detector comprising a linear array receiving portion and a planar array receiving portion, the linear array receiving portion and the planar array receiving portion being configured to receive the radiation emitted from the radiation source, the radiation source and the detector being arranged on both sides of the carrier platform in a first direction, wherein a scanning area of the radiation emitted from the radiation source and received by the linear array receiving portion forms a first scanning area, a scanning area of the radiation emitted from the radiation source and received by the planar array receiving portion forms a second scanning area, the carrier platform being movably arranged in a second direction perpendicular to the first direction to move a partial area of the object to be detected through the first scanning area or to the second scanning area, the carrier platform being rotatably arranged about a rotation axis parallel to the second direction.

2. The radiation scanning detection device according to claim 1, wherein the detector comprises a linear array detector and a planar array detector, the linear array receiving portion being formed on the linear array detector, and the planar array receiving portion being formed on the planar array detector.

3. The radiation scanning detection device according to claim 2, wherein a pixel size of the planar array receiving portion is smaller than a pixel size of the linear array receiving portion.

4. The radiation scanning detection device according to claim 1 or 2, wherein the carrier platform comprises a turntable rotatably arranged about a rotation axis parallel to the second direction to enable the radiation scanning detection device to perform a three-dimensional radiation scanning on the partial area of the object to be detected in the second scanning area.

5. The radiation scanning detection device according to claim 4, wherein the carrier platform further comprises a first moving mechanism movably arranged in the second direction to move the partial area of the object to be detected from the first scanning area to the second scanning area, and a second moving mechanism movably arranged in a third direction perpendicular to the first direction and perpendicular to the second direction to calibrate the position of the partial area of the object to be detected in the second scanning area.

6. The radiation scanning detection device according to claim 5, wherein the radiation scanning detection device further comprises a control assembly, the control assembly is configured to: control the carrier platform to move in the second direction to enable the first scanning area to scan the entire area of the object to be detected to obtain a first radiation scanning image; identify a risk area of the object to be detected according to the first radiation scanning image; control the carrier platform to move in the second direction to place the risk area of the object to be detected in the second scanning area; and control the carrier platform to rotate to obtain a second radiation scanning image of the risk area of the object to be detected. the control assembly is further configured to:

7. The radiation scanning inspection apparatus of claim 6, wherein, ​ controlling the second moving mechanism to move by a position offset in a third direction, the position offset being a distance between the risk region of the object under test and an edge of the second scanning region in the third direction, the position offset being determined according to positions of the edge of the object under test and the edge of the second scanning region in the third direction.

8. The radiation scanning inspection apparatus of claim 6, wherein, The control component is configured to: control the turntable to rotate about its rotation axis at a fixed rotation rate to obtain the first radiation scan image of the object under test, when the object platform is moving in the second direction to make the radiation of the first scanning region scan the whole region of the object under test.

9. The radiation scanning inspection apparatus of claim 6, wherein, The control component is configured to: control the turntable to rotate about its rotation axis to a first position, the first position being a rotation orientation in which the object under test has a maximum projection area relative to the radiation of the first scanning region; and control the object platform to move in the second direction to make the object under test pass through the first scanning region to obtain the first radiation scan image. The object under test comprises an electronic product.

10. The radiation scanning inspection apparatus of claim 6, wherein, The method comprises:

11. A method of radiation scan detection, the method comprising: moving the object under test in a second direction perpendicular to an emission direction of the radiation beam to make the radiation of the corresponding linear array detector scan the whole region of the object under test to obtain a first radiation scan image of the object under test; determining a risk region of the object under test according to the first radiation scan image; moving the risk region of the object under test in the second direction into a scanning region of the radiation of the corresponding area array detector; and rotating the object under test about its own rotation axis parallel to the second direction to obtain a second radiation scan image of the object under test. Before the moving of the risk region of the object under test in the second direction into the scanning region of the radiation of the corresponding area array detector, the method further comprises:

12. The method of claim 11, wherein, determining a position offset according to the risk region of the object under test and a radiation range of the scanning region of the radiation of the corresponding area array detector in a third direction perpendicular to the emission direction of the radiation beam and perpendicular to the second direction; and moving the object under test in the third direction by the position offset. The moving of the object under test in the second direction perpendicular to the emission direction of the radiation beam further comprises:

13. The method of claim 11, wherein, rotating the object under test about its own rotation axis to a first position, the first position being a rotation orientation in which the object under test has a maximum projection area relative to the radiation of the corresponding linear array detector; and maintaining the object under test in the first position and moving the object under test in the second direction. The moving of the object under test in the second direction perpendicular to the emission direction of the radiation beam further comprises:

14. The method of claim 11, wherein, continuously rotating the object under test about its own rotation axis; and moving the object under test in the second direction while maintaining the rotation of the object under test. ​

Images