A real-world, growth-oriented X-ray security inspection method and system for hazardous liquids

Abstract

The present invention relates to the field of liquid security inspection technology, and specifically to a real-world growth-oriented hazardous liquid X-ray security inspection method and system, comprising the following steps: starting a dual-source X-ray security inspection machine, irradiating the inspection object with built-in high-energy and low-energy light sources, generating a corresponding original grayscale image, and transmitting it to an industrial control computer; after reading the physical information characteristics of the original grayscale image, using an image enhancement method to optimize the original grayscale image to obtain an enhanced image; collecting the enhanced X-ray image of the hazardous liquid, and making corresponding samples and labels for each type of hazardous liquid; the beneficial effect is: the real-world growth-oriented hazardous liquid X-ray security inspection method and system proposed by the present invention, with the technical support of the dual-energy X-ray security inspection machine, accurately locates and identifies the hazardous liquid by identifying and fusing various physical characteristic information of the liquid to be identified; fully fusing the physical characteristic information of the liquid, thereby improving the recognition accuracy of the liquid.

Description

Technical Field

[0001] The present invention relates to the field of liquid security inspection, and in particular to a real-world, growth-oriented X-ray security inspection method and system for hazardous liquids. Background Art

[0002] With the advancement of science and technology, the public transportation network has experienced rapid and high-quality development. Today, the country's comprehensive, multi-dimensional public transportation network, encompassing bus, rail, ferry, and aviation, effectively meets the personalized and diverse needs of the public for convenient, fast travel. However, while rapid technological advancements have significantly improved the public transportation network, they have also spawned a diverse range of new hazardous materials with diverse functions, posing significant safety risks to public transportation. In recent years, accidents caused by passengers unauthorizedly carrying hazardous materials have become commonplace. Consequently, government agencies have implemented security checks at public transportation hubs and other crowded indoor public spaces.

[0003] Currently, the primary form of security screening in China involves staff observing images displayed by non-contact X-ray machines to determine whether a passenger's baggage contains prohibited items. With the advancement of object detection technology, some regions have begun using it to assist security personnel in inspecting tourists' bags. Existing detection technology utilizes information such as the object's appearance and material characteristics to determine whether a package in an image is prohibited. However, few solutions exist for identifying liquids.

[0004] To address this issue, some domestic researchers have proposed corresponding solutions. One of the most widely used principles is to use the different atomic number characteristics of different liquids, combined with deep learning and target detection technology, to identify hazardous liquids. However, this technical solution has a low detection rate in actual applications. In the real world, with the continuous evolution of technology, different types of liquids emerge in an endless stream, and some liquids have relatively similar atomic numbers. Relying solely on atomic number to identify hazardous liquids is not sufficient to meet the actual needs of today's society.

[0005] Furthermore, existing recognition models lack self-growth properties. Improving the model's recognition types and accuracy requires technicians to regularly collect data from security inspection machines, return to research sites, and train and improve the security inspection recognition system. Once the upgrade is complete, they must return to the security inspection machines to update the model. This upgrade method not only consumes researchers' commuting time but also aligns with the current trend of "machine self-growth" within "intelligent growth." Summary of the Invention

[0006] The purpose of the present invention is to provide a real-world growth-oriented hazardous liquid X-ray security inspection method and system to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a real-world growth-oriented X-ray security inspection method for hazardous liquids, the method comprising the following steps:

[0008] Start the dual-source X-ray security inspection machine, which uses the built-in high-energy and low-energy light sources to illuminate the inspection items, generate the corresponding original grayscale image, and transmit it to the industrial computer;

[0009] The industrial computer reads the characteristic information of the original grayscale image, including X-ray attenuation rate, pixel value, pixel distribution, and integrates various physical characteristic information of the liquid based on the wall thickness removal and R-pointer curve fitting algorithm; reads the effective atomic number of the liquid to be tested. The effective atomic number formula is: Z = a × e (a×R) +b×e (β×R) , based on the effective atomic number formula, the equivalent formula that removes the container wall thickness is integrated: Where A is the absorption intensity, and the equivalent formula of A is: L is the effective absorption length; read the X-ray attenuation coefficient of the liquid to be tested. According to the Beer-Lambert law, the formula for the X-ray attenuation coefficient of the liquid to be tested is: I is the original X-ray energy, I0 is the X-ray energy after the X-ray penetrates the object to be tested and is attenuated. The original and attenuated X-ray energy data can be directly obtained from the detection board;

[0010] After reading the physical information features of the original grayscale image, the image enhancement method is used to optimize the original grayscale image to obtain an enhanced image;

[0011] Collect enhanced X-ray images of hazardous liquids and create corresponding samples and labels for each type of hazardous liquid;

[0012] The obtained dangerous liquid sample images were randomly divided into training set and test set according to the ratio of 7:3;

[0013] Build optimized and improved deep learning neural network models;

[0014] Use the training set to train the deep learning neural network model to obtain the trained detection model. Then use the test set to test the trained detection model, and set the confidence threshold and IOU value related parameters according to the recognition effect.

[0015] Preferably, the deep learning network model uses the basic target detection model of the network as

[0016] The YOLO model uses DenseNet to replace the backbone network in YOLO and adds an attention mechanism to the network. It integrates TOPIC's incremental small sample learner into the deep learning network. Security inspectors use newly added categories of X-ray images for model training, achieving the model's self-growth property.

[0017] Preferably, the deep learning network model adopts the YOLO model as the basic target detection model of the network, uses DenseNet to replace the backbone network in YOLO, and adds an attention mechanism to the network; the incremental small sample learner of TOPIC is integrated into the deep learning network, and the security inspector uses the newly added category X-ray images for model training to achieve the self-growth property of the model.

[0018] A growth-oriented hazardous liquid X-ray security inspection system for the real world, the system includes a dual-energy X-ray security inspection machine, an opening is provided on the surface of the dual-energy X-ray security inspection machine, a conveyor belt is installed inside the opening, a reserved installation opening is provided on the side wall of the dual-energy X-ray security inspection machine, the reserved installation opening is located below the conveyor belt, a mounting plate is plugged into the reserved installation opening, both ends of the mounting plate are installed with assembly plates, and a dual-energy X-ray light source is embedded in the center of the top surface of the mounting plate, an X-ray array detector is installed in the center of the top surface of the opening, a traction frame is fixed on the surface of the assembly plate, the traction frame passes through the side wall of the dual-energy X-ray security inspection machine and extends into the opening, one end of the traction frame is plugged with an extension frame, one end of the extension frame is plugged into the surface of the calibration plate, both ends of the calibration plate are rotatably connected to the limit shaft, and the limit shaft is braked at the end of the calibration plate after the position is adjusted, and a storage slot is provided on the top surface of the side plate of the conveyor belt.

[0019] Preferably, both sides of the dual-energy X-ray security inspection machine are provided with mounting slots, the mounting slots are in the form of inverted "L" slots, the bottom ends of the mounting slots are connected to the reserved mounting openings, the assembling plate is inserted into the mounting slots, the bottom surface of the assembling plate is integrally formed with a baffle, the baffle blocks one side of the dual-energy X-ray security inspection machine, the mounting plate is in a "convex" shaped plate structure, the bottom surface of the assembling plate overlaps the slot body at the end of the mounting plate, and a screw is fixed on the side wall of the slot body at the end of the mounting plate, after the screw passes through the assembling plate, the end of the screw is screwed with a nut, and a pulley groove is provided on the side of the assembling plate away from the dual-energy X-ray security inspection machine, a pulley is installed inside the pulley groove, the bottom surface of the pulley is below the baffle, and a supporting groove is provided on the surface of the baffle, and a clamping screw second is screwed on the bottom surface of the baffle, and the clamping screw second extends into the supporting groove, and the clamping screw second is used to limit the X-ray array detector after disassembly, and a pick-up groove one is provided on the surface of the assembling plate.

[0020] Preferably, an embedding groove is formed in the top surface of the mounting plate, and two positioning brackets are fixed to the bottom surface of the embedding groove. The positioning brackets are in a shape of a "U"-shaped plate structure, and the two positioning brackets are distributed oppositely. The dual-energy X-ray source is inserted between the two positioning brackets. A clamping screw rod I is screwed on the surface of the dual-energy X-ray source. After the clamping screw rod I is locked, it clamps the dual-energy X-ray source. Brushing plates are fixed to both ends of the positioning bracket by screws, and the bristles of the brushing plates abut against the bottom surface of the conveyor belt.

[0021] Preferably, the traction bracket is in a shape of a "U"-shaped plate structure. Sliders are fixed to both the top surface and the bottom surface of the extension bracket. Through holes are formed in the surfaces of the sliders. The sliders are slidably connected to the inside of the chute. The chute is formed in the surface of the traction bracket. Guide rods are inserted into the sliders. The guide rods are fixed between two parallel side walls of the chute. Springs are sleeved on the rod bodies of the guide rods, and the springs are clamped between the sliders and the chute.

[0022] Preferably, a plug block is fixed to one end of the extension bracket away from the traction bracket. The plug block is in a shape of a "square frame" - shaped plate structure. A socket is formed in the surface of the alignment plate. A limiting port is formed in the top surface of the socket. The limiting port is in a shape of a "T"-shaped port. The plug block is inserted into the socket. An insertion handle is inserted into the limiting port. The bottom end of the insertion handle is inserted into the inner ring port of the plug block. A notch is formed in the top surface of the insertion handle. An elastic band is fixed to the surface of the notch. Both ends of the elastic band are fixed to the top groove body of the limiting port. A pull ring is fixed to the top surface of the insertion handle.

[0023] Preferably, the alignment plate is in a shape of a "convex" - shaped plate structure. Limiting shafts are fixed to the surfaces of both end plates of the alignment plate. The limiting shafts are in a shape of a "T"-shaped cylinder. One end of the limiting shaft penetrates through the guide plate. An embedding groove II is formed in the top surface of the guide plate. The embedding groove II is in a shape of an annular groove. A rubber gasket is fixed to the inside of the embedding groove II. The thickness of the rubber gasket is greater than the depth of the embedding groove II. A clamping screw rod III is screwed on the top surface of the limiting shaft. After the clamping screw rod III penetrates through the top plate of the rubber gasket, it clamps the rubber gasket to cause elastic deformation.

[0024] Preferably, when the alignment plate and the two guide plates are collinear, the maximum distance between the ends of the two guide plates is less than the length of the long side of the storage groove. A reinforcing frame is fixed to the inside of the storage groove. A plurality of rubber clamping blocks are fixed to the side wall of the reinforcing frame. After the alignment plate and the guide plates are removed and placed in the storage groove, at this time, the rubber clamping blocks are clamped between the reinforcing frame and the guide plates to cause elastic deformation. Compared with the prior art, the beneficial effects of the present invention are:

[0025] The present invention proposes a real-world growth-oriented X-ray security inspection method and system for hazardous liquids. With the technical support of a dual-energy X-ray security inspection machine, the system accurately locates and identifies hazardous liquids by identifying and integrating various physical characteristic information of the liquid to be identified. It fully integrates the physical characteristic information of the liquid, such as the effective atomic number, liquid density, viscosity, etc., thereby improving the accuracy of liquid recognition. In addition, as the missed detection and false detection data generated in daily security inspections increase, the data set composed of these false detection data is used to use the incremental learning method for the detection model, and its detection accuracy and detection range will continue to be upgraded and grown to meet the standards of smart security inspection. At the same time, the identification carrier of this method is an external industrial computer, and the identification function can be realized by integrating the industrial computer with the security inspection machine. There is no need to upgrade the hardware of the existing security inspection machine, thereby reducing the upgrade cost of the security inspection machine. In summary, the adoption of the present invention can effectively enhance the accuracy and reliability of security inspection instruments in the field of liquid detection, effectively reduce the number of security inspection steps for passengers to taste drinks, and thus improve security inspection efficiency. Moreover, its growth attributes can adapt to the era of rapid updates and iterations of various liquid products, and provide a powerful tool for improving security inspection efficiency while ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the dual-energy X-ray security inspection machine of the present invention;

[0027] Figure 2 for Figure 1 Side view of the mid-structure;

[0028] Figure 3 for Figure 2 Structural cross-section at AA in the middle;

[0029] Figure 4 for Figure 3 A schematic diagram of the structure at center A;

[0030] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0031] Figure 6 for Figure 1 Front view of the middle structure;

[0032] Figure 7 for Figure 6 Structural cross-section at the middle BB;

[0033] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point C in the middle;

[0034] Figure 9 This is a schematic diagram of the connection structure between the mounting plate and the assembly plate of the present invention;

[0035] Figure 10 for Figure 9 Top view of the middle structure;

[0036] Figure 11 for Figure 10 Structural cross-section at the middle CC;

[0037] Figure 12 for Figure 11 A magnified schematic diagram of the structure at D in the middle;

[0038] Figure 13 This is a schematic diagram of the connection structure between the alignment plate and the guide plate of the present invention;

[0039] Figure 14 for Figure 13 A magnified schematic diagram of the structure at E in the middle;

[0040] Figure 15 This is a structural diagram of the alignment board of the present invention;

[0041] Figure 16 This is a schematic diagram of the guide plate structure of the present invention;

[0042] Figure 17 for Figure 16 A magnified schematic diagram of the structure at F in the middle;

[0043] Figure 18 This is a schematic diagram of the connection structure between the traction frame and the extension frame of the present invention;

[0044] Figure 19 This is a schematic diagram of the mounting plate structure of the present invention;

[0045] Figure 20 This is a schematic diagram of the extension frame structure of the present invention;

[0046] Figure 21 This is a schematic diagram of the connection structure between the dual-energy X-ray security inspection machine and the conveyor belt of the present invention;

[0047] Figure 22 for Figure 21 A magnified schematic diagram of the structure at G in the middle;

[0048] Figure 23 This is an equivalent schematic diagram of X-ray penetrating an object to be tested according to the present invention;

[0049] Figure 24 This is a flowchart of image processing and recognition of the present invention;

[0050] Figure 25 This is a diagram of the feature information fusion process of the present invention;

[0051] Figure 26 This is a diagram of the detection model training process of the present invention.

[0052] Figure: Dual-energy X-ray security inspection machine 1, conveyor belt 2, reserved installation port 3, installation slot 4, installation plate 5, embedded slot 6, positioning frame 7, dual-energy X-ray light source 8, clamping screw 1 9, brush plate 10, assembly plate 11, screw 12, nut 13, supporting slot 14, clamping screw 2 15, pulley slot 16, pulley 17, pick-up slot 18, traction frame 19, extension frame 20, plug block 21, socket 22, limit port 23, handle 24, slot 25, elastic band 26, pull ring 27, slider 28, guide rod 29, spring 30, storage slot 31, stop frame 32, rubber support plate 33, second extraction slot 34, calibration plate 35, limit shaft 36, guide plate 37, second mounting slot 38, rubber gasket 39, third clamping screw 40, storage slot 41, reinforcement frame 42, rubber clamping block 43, X-ray array detector 44, slide slot 45. DETAILED DESCRIPTION

[0053] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] Example 1

[0055] See also Figure 23-26 The present invention provides a technical solution: a real-world growth-oriented X-ray security inspection method for hazardous liquids, the method comprising the following steps:

[0056] 1) The dual-energy X-ray security inspection machine generates two original grayscale images of the liquid: low energy and high energy.

[0057] 2) Read the physical feature information of two X-ray security inspection images.

[0058] a) Read the effective atomic number of the liquid to be tested. The formula for the effective atomic number is: Z = a × e (a×R) +b×e (β×R) , based on the effective atomic number formula, the equivalent formula that removes the container wall thickness is integrated: Where A is the absorption intensity, and the equivalent formula of A is: L is the effective absorption length, and the specific equivalent scenario is as follows Figure 23 shown.

[0059] b) Read the X-ray attenuation coefficient of the liquid to be tested. According to the Beer-Lambert law, the formula for the X-ray attenuation coefficient of the liquid to be tested is: Where I is the original X-ray energy, and I0 is the X-ray energy after the X-ray penetrates the object to be tested and is attenuated. The original and attenuated X-ray energy data can be directly obtained from the detection board (i.e., obtained in two scenarios: not detecting the package and detecting the package).

[0060] c) Analyze the relative dielectric constant of the liquid. The propagation speed of X-rays in liquid media depends on the electromagnetic properties of the medium. Here, the relative dielectric constant is analyzed and calculated to determine the type of liquid. and Based on (where c is the speed of light, the value is 3×10 8 m / s, n is the refractive index when X-ray penetrates the liquid, ε r is the relative dielectric constant of the liquid, μ r is the relative magnetic permeability). In real life, non-magnetic liquids are common, and for most non-magnetic liquids, the relative magnetic permeability is about 1. For ease of calculation, the relative magnetic permeability is set to 1. Therefore, in this context, the formula Equivalent to but Right now In the real world, liquids are often contained in containers of varying shapes and types. However, the container walls have a relatively small effect on X-ray propagation speed, primarily affecting X-ray intensity. Therefore, the effect of the container walls can be ignored. In summary, by measuring the propagation speed of X-rays as they penetrate a liquid, the liquid's type can be determined. Table 1 shows the relative dielectric constants of common liquids.

[0061] d) Use the FPN (Feature Pyramid Network) algorithm to perform convolution fusion on the extracted physical feature information to obtain the final feature information.

[0062] 3) Preprocess the two X-ray security inspection images, such as Figure 24 shown.

[0063] a) Extract the X-ray image feature information of the liquid to be detected, fuse the feature information through the Densenet convolutional network, and perform feature matching to infer whether the liquid to be detected is a dangerous liquid. The fusion process is shown in Figure 3 .

[0064] b) Improve the quality of X-ray images through filtering, image binarization and other methods.

[0065] c) Segment the image containing multiple objects. Here, a fully convolutional network (FCN) is used for segmentation to obtain multiple X-ray image information containing the liquid to be detected.

[0066] 4) Use the improved YOLO target detection model to identify and detect dangerous liquids. When the target is detected as a liquid, suspected dangerous liquid, or a new type of liquid, and the detection confidence exceeds the set threshold, a label prompt is given to remind the security inspector to open the package for inspection. The training method of this model is as follows: Figure 26 As shown:

[0067] a) Based on an image dataset containing drinkable liquids and abnormal liquids, a self-supervised contrastive learning method is used to train a convolutional neural network that can distinguish between the two types of liquids to classify them and extract the physical characteristics of dangerous liquids.

[0068] b) Collect X-ray images of prohibited liquids, such as alcohol, gasoline, and hydrochloric acid, as specified in the railway security inspection catalog, annotate the X-ray images, and then create a dataset of prohibited liquids with a training set:test set ratio of 7:3.

[0069] c) Use the prepared dataset to retrain the convolutional neural network so that the model has the initial ability to detect dangerous liquids in packages.

[0070] 5) All detected abnormal images are stored in the backend. After daily security checks, security inspectors can process the images and manually annotate any missed or misdetected images. The processed images are then used as a dataset for model training.

[0071] Example 2

[0072] Based on the first embodiment, a real-world growth-oriented hazardous liquid X-ray security inspection system is proposed.

[0073] 1) Start the dual-energy X-ray security inspection machine to generate two original grayscale images of the liquid, low energy and high energy, and transmit them to the industrial computer.

[0074] 2) A data preprocessing module is set up in the industrial computer to preprocess the data of the two X-ray images:

[0075] a) Read the effective atomic number of the liquid to be tested. Obtain the effective atomic number of the liquid to be tested using the effective atomic number formula and an equivalent formula that eliminates the container wall thickness.

[0076] b) Read the X-ray attenuation coefficient of the liquid to be tested. According to the algorithm based on the Beer-Lambert law, the X-ray attenuation coefficient of the liquid to be tested is calculated by the original energy of the X-ray of the liquid to be tested and the energy value attenuated after penetrating the object.

[0077] c) Analyze the relative dielectric constant of the liquid. By recording the time required for X-rays to penetrate the liquid, calculate the speed at which X-rays penetrate the liquid. Then use the formula and Calculate the relative dielectric constant of the liquid.

[0078] d) Use the FPN algorithm to perform convolution fusion on the extracted physical feature information to obtain the final feature information.

[0079] 3) The image enhancement module in the industrial computer processes both high-energy and low-energy X-ray security inspection images:

[0080] a) The image processing module extracts the feature information of the original grayscale image of the X-ray of the detected liquid, fuses the feature information through the DenseNet convolutional network, and performs feature matching to infer whether the liquid to be detected is a hazardous liquid.

[0081] b) The image processing module improves the quality of X-ray images through image processing methods such as filtering and image binarization.

[0082] c) Segment the image containing multiple objects. The fully convolutional network (FCN) embedded in the module segments the image that meets the settings to obtain multiple X-ray images containing the liquid to be detected.

[0083] 4) The target detection module in the industrial computer infers whether the liquid to be detected belongs to the category of hazardous liquid based on the feature matching results.

[0084] 5) The hazardous liquid detection module within the industrial computer identifies the liquid based on the inference results. A convolutional neural network model, with the hazardous liquid detection module as its backbone, detects the liquid and calculates a confidence level. If the confidence level meets or exceeds a threshold, the liquid is labeled and the security inspector is prompted to open the package for inspection. The model is trained as follows:

[0085] a) Based on an image dataset containing drinkable liquids and abnormal liquids, a self-supervised contrastive learning method is used to train a convolutional neural network that can distinguish between the two types of liquids to classify them and extract the physical characteristics of dangerous liquids.

[0086] b) Collect X-ray images of prohibited liquids, such as alcohol, gasoline, and hydrochloric acid, as specified in the railway security inspection catalog, annotate the X-ray images, and then create a dataset of prohibited liquids with a training set:test set ratio of 7:3.

[0087] c) Use the prepared dataset to retrain the model’s convolutional neural network, so that the model has the initial ability to detect dangerous liquids in packages.

[0088] 6) After the inspection is completed, the industrial computer will output the processed X-ray image and the corresponding test results to the human-computer interaction interface to assist the security inspector in the inspection.

[0089] 7) During the working process, all detected abnormal images are uniformly stored in the background of the industrial control computer. After the daily security inspection is completed, the security inspector can retrieve the images in the background and uniformly process them, manually marking the images with missed detections and misdetections. And the processed images are used to retrain the model in the form of a dataset, so as to expand the accuracy rate and detection range of the detection model.

[0090] Embodiment III

[0091] Refer to the attached Figures 1 to 7 As shown in the figure, on the basis of Embodiment II, a growth-type dangerous liquid X-ray security inspection system for the real world is proposed. The system includes a dual-energy X-ray security inspection machine 1. An open slot is provided on the surface of the dual-energy X-ray security inspection machine 1. A conveyor belt 2 is installed inside the open slot. A reserved installation slot 3 is provided on the side wall of the dual-energy X-ray security inspection machine 1. The reserved installation slot 3 is located below the conveyor belt 2. An installation plate 5 is inserted into the reserved installation slot 3. Assembly plates 11 are installed at both ends of the installation plate 5. Installation slots 4 are provided on both sides of the dual-energy X-ray security inspection machine 1. The installation slot 4 is an inverted "L" slot. The bottom end of the installation slot 4 is connected to the reserved installation slot 3. The assembly plate 11 is inserted into the installation slot 4. A retaining piece is integrally formed on the bottom surface of the assembly plate 11. The retaining piece blocks one side of the dual-energy X-ray security inspection machine 1. The installation plate 5 is in a "convex" shaped plate structure. The bottom surface of the assembly plate 11 is lapped in the groove at the end of the installation plate 5. And a screw 12 is fixed on the side wall of the groove at the end of the installation plate 5. After the screw 12 penetrates through the assembly plate 11, a nut 13 is screwed on the end of the screw 12. A pulley groove 16 is provided on the side of the assembly plate 11 away from the dual-energy X-ray security inspection machine 1. A pulley 17 is installed inside the pulley groove 16. The bottom surface of the pulley 17 is below the retaining piece. A supporting groove 14 is provided on the surface of the retaining piece. A clamping screw II 15 is screwed on the bottom surface of the retaining piece. The clamping screw II 15 extends into the supporting groove 14. The clamping screw II 15 is used to limit the X-ray array detector 44 after disassembly. A picking groove I 18 is provided on the surface of the assembly plate 11; an embedding groove 6 is provided on the top surface of the installation plate 5. Two positioning frames 7 are fixed on the bottom surface of the embedding groove 6. The positioning frame 7 is in a "U" shaped plate structure. The two positioning frames 7 are distributed oppositely. The dual-energy X-ray source 8 is inserted between the two positioning frames 7. A clamping screw I 9 is screwed on the surface of the dual-energy X-ray source 8. After the clamping screw I 9 is tightened, it clamps the dual-energy X-ray source 8. Screws are fixed at both ends of the positioning frame 7 to a brush plate 10. The bristles of the brush plate 10 press against the bottom surface of the conveyor belt of the conveyor belt 2.

[0092] Before installing the mounting plate 5 in front of the dual-energy X-ray security inspection machine 1, the dual-energy X-ray source 8 needs to be embedded in the top surface of the mounting plate 5 first. Then, the assembly plate 11 at one end of the mounting plate 5 is removed, and one end of the mounting plate 5 is inserted into the reserved installation opening 3 until the assembly plate 11 at the other end of the mounting plate 5 is inserted into the corresponding installation groove 4. To prevent the mounting plate 5 from falling off, another assembly plate 11 is fixed at one end of the mounting plate 5. The specific fixing operation is as follows: After the screw 12 passes through the corresponding hole on the surface of the assembly plate 11, the nut 13 is screwed and locked on the screw 12. In this way, the two assembly plates 11 are respectively fixed at both ends of the mounting plate 5 and abut against one side of the dual-energy X-ray security inspection machine 1, thus preventing the mounting plate 5 from falling off.

[0093] The dual-energy X-ray source 8 is centrally embedded in the top surface of the mounting plate 5. The X-ray array detector 44 is centrally installed on the open top surface. An embedding groove 6 is opened on the top surface of the mounting plate 5. Two positioning frames 7 are fixed on the bottom surface of the embedding groove 6. The positioning frames 7 are in the shape of a "C"-shaped plate structure. The two positioning frames 7 are distributed oppositely. The dual-energy X-ray source 8 is inserted between the two positioning frames 7. A clamping screw 9 is screwed on the surface of the dual-energy X-ray source 8. After the clamping screw 9 is locked, it clamps the dual-energy X-ray source 8. Brushing plates 10 are fixed at both ends of the positioning frame 7 by screws. The bristles of the brushing plates 10 abut against the bottom surface of the conveyor belt of the conveyor belt 2. When installing the dual-energy X-ray source 8, the dual-energy X-ray source 8 is inserted into the space between the two positioning frames 7, and then the clamping screw 9 is rotated to clamp the dual-energy X-ray source 8, and the brushing plates 10 are fixed at the ends of the positioning frame 7 by means of screws. When the mounting plate 5 is installed in the reserved installation opening 3, the bristles of the brushing plates 10 abut against the lower part of the conveyor belt of the conveyor belt 2. During the rotation of the conveyor belt, the brushing plates 10 sweep the particulate matter on the surface of the conveyor belt to both sides of the mounting plate 5. The rays generated when the dual-energy X-ray source 8 works are received by the X-ray array detector 44. A storage groove 31 is opened on the bottom surface of the top groove body of the installation groove 4. A blocking frame 32 is movably inserted into the storage groove 31. A rubber support plate 33 is fixed between the inner groove body of the blocking frame 32 and the bottom surface of the storage groove 31. When the traction frame 19 is inserted into the top groove body of the installation groove 4, the blocking frame 32 is squeezed into the storage groove 31. At this time, the rubber support plate 33 is compressed to produce elastic deformation. When the traction frame 19 is withdrawn from the installation groove 4, the rubber support plate 33 rebounds to support the blocking frame 32 to block the top groove body of the installation groove 4. A picking groove 34 is opened on the surface of the blocking frame 32.

[0094] A traction frame 19 is fixed on the surface of the assembly plate 11. The traction frame 19 penetrates through the side wall of the dual-energy X-ray security inspection machine 1 and extends into the open space. One end of the traction frame 19 is inserted with an extension frame 20. One end of the extension frame 20 is inserted on the surface of the alignment plate 35. The traction frame 19 is in a "C"-shaped plate structure. Sliders 28 are fixed on both the top surface and the bottom surface of the extension frame 20. A through hole is formed on the surface of the slider 28. The slider 28 is slidably connected inside a chute 45. The chute 45 is formed on the surface of the traction frame 19. A guide rod 29 is inserted inside the slider 28. The guide rod 29 is fixed between two parallel side walls of the chute 45. A spring 30 is sleeved on the rod body of the guide rod 29. The spring 30 is clamped between the slider 28 and the chute 45; One end of the extension frame 20 away from the traction frame 19 is fixed with an insertion block 21. The insertion block 21 is in a "square frame" - shaped plate structure. An insertion port 22 is formed on the surface of the alignment plate 35. A limiting port 23 is formed on the top surface of the insertion port 22. The limiting port 23 is in a "T"-shaped port. The insertion block 21 is inserted into the insertion port 22. An insertion handle 24 is inserted inside the limiting port 23. The bottom end of the insertion handle 24 is inserted into the inner ring opening of the insertion block 21. A notch 25 is formed on the top surface of the insertion handle 24. An elastic band 26 is fixed on the surface of the notch 25. Both ends of the elastic band 26 are fixed in the top groove body of the limiting port 23. A pull ring 27 is fixed on the top surface of the insertion handle 24.

[0095] The extension frame 20 and the alignment plate 35 are in an assembled structure, that is, the alignment plate 35 is detachable at the end of the extension frame 20. When it is necessary to disassemble the alignment plate 35, pinch the pull ring 27 and extract the insertion handle 24. The insertion handle 24 pushes against the elastic band 26 to generate elastic deformation until the bottom end of the insertion handle 24 is withdrawn from the inner ring opening of the insertion block 21. After that, there is no connection between the insertion block 21 and the alignment plate 35, and the alignment plate 35 can be withdrawn from the insertion block 21.

[0096] Both ends of the calibration plate 35 are rotatably connected to the limit shaft 36. After the position of the limit shaft 36 is adjusted, the brake is applied to the end of the calibration plate 35. The calibration plate 35 is a "convex" shaped plate structure. The limit shaft 36 is fixed to the surface of the plate at both ends of the calibration plate 35. The limit shaft 36 is a "T" shaped cylinder. The limit shaft 36 passes through one end of the guide plate 37. The top surface of the guide plate 37 is provided with an embedded groove 38. The embedded groove 38 is an annular groove. A rubber gasket 39 is fixed inside the embedded groove 38. The thickness of the rubber gasket 39 is greater than the depth of the embedded groove 38. The top surface of the limit shaft 36 is screwed with a clamping Screw three 40, the clamping screw three 40 passes through the top plate of the rubber gasket 39 and clamps the rubber gasket 39 to produce elastic deformation; a storage groove 41 is opened on the top surface of the side plate of the conveyor belt 2; when the alignment plate 35 and the two guide plates 37 are collinear, the farthest distance between the ends of the two guide plates 37 is less than the long side length of the storage groove 41, and a reinforcement frame 42 is fixed inside the storage groove 41, and a plurality of rubber clamping blocks 43 are fixed on the side wall of the reinforcement frame 42. After the alignment plate 35 and the guide plate 37 are removed, they are placed in the storage groove 41. At this time, the rubber clamping blocks 43 are clamped between the reinforcement frame 42 and the guide plate 37 to produce elastic deformation.

[0097] When the calibration plate 35 is installed at the end of the extension frame 20, the guide plate 37 is used to guide the transported items to the middle, so as to facilitate the dual-energy X-ray light source 8 to cooperate with the X-ray array detector 44 to detect the items; when the calibration plate 35 is removed from the end of the extension frame 20, it is necessary to store the calibration plate 35 and the guide plate 37 in the storage slot 41, loosen the clamping screw three 40 to no longer clamp the rubber gasket 39, and at this time, move the guide plate 37 to rotate with the limit shaft 36 as the central axis until the guide plate 37 and the calibration plate 35 are collinear, re-tighten the clamping screw three 40 to clamp the rubber gasket 39, and then push the calibration plate 35 together with the guide plate 37 into the reinforcement frame 42.

[0098] It should be noted that after the mounting plate 5 is pulled out from the reserved mounting opening 3, the two assembly plates 11 are fixed at both ends of the mounting plate 5. At this time, the pulley 17 supports the ground. After the X-ray array detector 44 is removed and inserted into the supporting groove 14, the clamping screw 15 is screwed to clamp the X-ray array detector 44, completing the matching storage of the dual-energy X-ray light source 8 and the X-ray array detector 44, and facilitating sliding transfer.

[0099] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A real-world, growth-oriented hazardous liquid X-ray security inspection system, characterized by: The system includes a dual-energy X-ray security inspection machine (1). An open opening is provided on the surface of the dual-energy X-ray security inspection machine (1). A conveyor belt (2) is installed inside the open opening. A reserved installation opening (3) is provided on the side wall of the dual-energy X-ray security inspection machine (1). The reserved installation opening (3) is located below the conveyor belt (2). An installation plate (5) is inserted into the reserved installation opening (3). Assembly plates (11) are installed at both ends of the installation plate (5). A dual-energy X-ray source (8) is centrally embedded on the top surface of the installation plate (5). An X-ray array detector (44) is centrally installed on the top surface of the open opening. A traction frame (19) is fixed on the surface of the assembly plate (11). The traction frame (19) penetrates through the side wall of the dual-energy X-ray security inspection machine (1) and extends into the open opening. An extension frame (20) is inserted at one end of the traction frame (19). One end of the extension frame (20) is inserted into the surface of an alignment plate (35). Limiting shafts (36) are rotatably connected to both ends of the alignment plate (35). After the position of the limiting shafts (36) is adjusted, they are braked at the end of the alignment plate (35). A storage groove (41) is provided on the top surface of the side plate of the conveyor belt (2). Installation grooves (4) are provided on both sides of the dual-energy X-ray security inspection machine (1). The installation grooves (4) are inverted "L" grooves. The bottom end of the installation groove (4) is connected to the reserved installation opening (3). The assembly plate (11) is inserted into the installation groove (4). A retaining piece is integrally formed on the bottom surface of the assembly plate (11). The retaining piece blocks one side of the dual-energy X-ray security inspection machine (1). The installation plate (5) is in a "convex" shaped plate structure. The bottom surface of the assembly plate (11) overlaps in the groove at the end of the installation plate (5). A screw rod (12) is fixed on the side wall of the groove at the end of the installation plate (5). After the screw rod (12) penetrates through the assembly plate (11), a nut (13) is screwed at the end of the screw rod (12). A pulley groove (16) is provided on the side of the assembly plate (11) away from the dual-energy X-ray security inspection machine (1). A pulley (17) is installed inside the pulley groove (16). The bottom surface of the pulley (17) is below the retaining piece. A supporting groove (14) is provided on the surface of the retaining piece. A clamping screw rod II (15) is screwed on the bottom surface of the retaining piece. The clamping screw rod II (15) extends into the supporting groove (14). The clamping screw rod II (15) is used to limit the X-ray array detector (44) after disassembly. A picking groove I (18) is provided on the surface of the assembly plate (11). An embedding groove (6) is provided on the top surface of the installation plate (5). Two positioning frames (7) are fixed on the bottom surface of the embedding groove (6). The positioning frames (7) are in a "U" shaped plate structure. The two positioning frames (7) are distributed oppositely. The dual-energy X-ray source (8) is inserted between the two positioning frames (7). A clamping screw rod I (9) is screwed on the surface of the dual-energy X-ray source (8). After the clamping screw rod I (9) is tightened, it clamps the dual-energy X-ray source (8). Brushing plates (10) are fixed at both ends of the positioning frame (7) by screws. The bristles of the brushing plates (10) press against the bottom surface of the conveyor belt of the conveyor belt (2).

2. The real-world, growth-oriented hazardous liquid X-ray security inspection system according to claim 1, characterized in that: The traction frame (19) has a "C"-shaped plate structure. Sliders (28) are fixed to both the top surface and the bottom surface of the extension frame (20). Through holes are provided on the surface of the sliders (28). The sliders (28) are slidably connected to the inside of the sliding grooves (45). The sliding grooves (45) are provided on the surface of the traction frame (19). Guide rods (29) are inserted into the sliders (28). The guide rods (29) are fixed between two parallel side walls of the sliding grooves (45). Springs (30) are sleeved on the rod bodies of the guide rods (29). The springs (30) are clamped between the sliders (28) and the sliding grooves (45).

3. The real-world, growth-oriented hazardous liquid X-ray security inspection system according to claim 1 is characterized by: One end of the extension frame (20) away from the traction frame (19) is fixed with an insertion block (21). The insertion block (21) has a "square frame" - shaped plate structure. A socket (22) is provided on the surface of the alignment plate (3). A limiting port (23) is provided on the top surface of the socket (22). The limiting port (23) is a "T"-shaped port. The insertion block (21) is inserted into the socket (22). An insertion handle (24) is inserted into the limiting port (23). The bottom end of the insertion handle (24) is inserted into the inner ring port of the insertion block (21). A notch (25) is provided on the top surface of the insertion handle (24). An elastic band (26) is fixed to the surface of the notch (25). Both ends of the elastic band (26) are fixed in the top groove body of the limiting port (23). A pull ring (27) is fixed to the top surface of the insertion handle (24).

4. The real-world, growth-oriented hazardous liquid X-ray security inspection system according to claim 1, characterized in that: The alignment plate (35) has a "convex" - shaped plate structure. Limiting shafts (36) are fixed to the surfaces of both end plates of the alignment plate (35). The limiting shafts (36) are "T"-shaped cylinders. The limiting shafts (36) penetrate through one end of the guide plate (37). An embedding groove two (38) is provided on the top surface of the guide plate (37). The embedding groove two (38) is an annular groove. A rubber gasket (39) is fixed inside the embedding groove two (38). The thickness of the rubber gasket (39) is greater than the depth of the embedding groove two (38). A clamping screw three (40) is screwed to the top surface of the limiting shaft (36). The clamping screw three (40) penetrates through the top plate of the rubber gasket (39) and clamps the rubber gasket (39) to cause elastic deformation.

5. The real-world, growth-oriented hazardous liquid X-ray security inspection system according to claim 1 is characterized by: When the alignment plate (35) and the two guide plates (37) are collinear, the farthest distance between the ends of the two guide plates (37) is less than the length of the long side of the storage groove (41). A strengthening frame (42) is fixed inside the storage groove (41). A plurality of rubber clamping blocks (43) are fixed to the side walls of the strengthening frame (42). After the alignment plate (35) and the guide plates (37) are removed and placed in the storage groove (41), at this time, the rubber clamping blocks (43) are clamped between the strengthening frame (42) and the guide plates (37) to cause elastic deformation.

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