Online nondestructive detection system, method and equipment for thickness of each layer of coated particle

Abstract

The invention relates to the technical field of nuclear engineering, in particular to an on-line nondestructive detection system, method and equipment for the thickness of each layer of a coated particle, the system comprises a sample table, an X-ray tube assembly, an imaging assembly, a feeding and discharging unit, a controller and a processor, and the processor is configured to execute the following steps: sending a shooting instruction of a first lens of the imaging assembly to the controller, the controller controls the sample table to move, acquires an image shot by the first lens, identifies the central position of the image and sends a shooting instruction of a second lens of the imaging assembly to the controller, and the controller controls the sample table to move, so that the second lens takes the central position as a starting point to shoot and acquire the image and identifies the coating layer contour of each coating particle one by one; and repeating the steps until each module finishes shooting, and finally determining the thickness of the coating layer according to the distance between the outlines of the coating layers. Therefore, the problem that online detection of a large number of coated particles on a nuclear fuel element production line is difficult to realize due to the fact that detection efficiency is not considered in related technologies is solved.

Description

Technical Field

[0001] This application relates to the field of nuclear engineering technology, and in particular to an online non-destructive testing system, method and equipment for the thickness of each layer of coated particles. Background Technology

[0002] The core of a high-temperature gas-cooled reactor fuel element is a TRISO (Tri-structural Isotropic) coated fuel particle. This particle is based on a UO2 (uranium dioxide) core with a diameter of approximately 0.5 mm, sequentially coated with a loose pyrolytic carbon layer, an inner dense pyrolytic carbon layer, a SiC (silicon carbide) layer, and an outer dense pyrolytic carbon layer, forming a multi-layered structure. These coating layers play crucial roles in reactor operation, including buffering stress, preventing the release of fission products, and providing mechanical strength, constituting the first line of defense for reactor safety. Therefore, accurate measurement of the thickness of each layer is essential to ensuring the safety and reliability of the fuel element.

[0003] Traditional detection methods primarily employ metallurgical microscopy. This method involves embedding fuel particles in resin, polishing them close to the particle's equatorial plane, and then imaging and analyzing the images to obtain information on the thickness of each coating layer. However, due to the tiny size and individual variability of TRISO particles, it is difficult to guarantee that all particles are accurately polished to the ideal position in practice. Furthermore, this method is destructive; samples cannot be reused, and a certain amount of radioactive waste is generated, limiting its application in large-scale detection. Summary of the Invention

[0004] This application provides an online non-destructive testing system, method, and equipment for the thickness of each layer of coated particles, in order to solve the problem that related technologies do not consider testing efficiency and are difficult to realize online testing of a large number of coated particles in nuclear fuel element production lines.

[0005] The first aspect of this application provides an online non-destructive testing system for the thickness of each layer of coated particles, comprising: a sample stage for placing a coated particle array arrangement device; an imaging component for capturing and acquiring images of the coated particle array arrangement device, wherein the imaging component includes an objective lens component and an acquisition component, the objective lens component includes a first lens and a second lens, the imaging field of view of the first lens being larger than that of the second lens; an X-ray tube component for emitting X-rays that penetrate the particle array arrangement device, and the imaging component acquiring the X-rays transmitted through the particle array arrangement device; a loading and unloading unit for placing or removing coated particles from the sample stage, the loading and unloading unit including a robotic arm and an inlet / outlet hopper; a controller for controlling the movement of the sample stage and the imaging component; and a processor configured to perform the following steps: sending a first position command and a first lens capturing command to the controller, the controller moving the sample stage to a first target position according to the first position command, and acquiring images captured by the first lens according to the first lens capturing command. The image is captured by the first lens as a module. The center position of the module is identified and used as the starting position of the second lens. A second position command and a second lens shooting command are sent to the controller. The controller controls the sample stage to move according to the pre-configured first moving trajectory, so that the second lens starts from the starting position and scans the coated particles according to the target scanning trajectory. The image captured by the second lens is acquired according to the second lens shooting command. After the second lens has completed the shooting of all coated particles in the module, the next position command and the first lens shooting command are sent to the controller according to the pre-configured second moving trajectory. The controller moves the sample stage to the next target position according to the next position command. The above steps are repeated at the next target position to acquire the image captured by the second lens until the second lens has completed the shooting of all coated particles in the coated particle array arrangement device. The outline of each coating layer of the coated particles in the image captured by the second lens is identified, and the coating layer thickness is determined according to the distance between the coating layer outlines.

[0006] Optionally, the processor is pre-configured with an image recognition algorithm, which is used to identify the center position of the module on the particle array arrangement device in the image captured by the first lens, and to identify the outline of each coating layer of the coated particles in the image captured by the second lens.

[0007] Optionally, the processor is pre-configured with a first moving trajectory and a second moving trajectory for the sample platform. The pre-configured first moving trajectory is as follows: starting from the center position of the module, the platform moves layer by layer from the inside out, with each coated particle as a unit. During the movement of the sample platform, all coated particles within the module are presented one by one within the field of view of the second lens. The pre-configured second moving trajectory is as follows: starting from the module at the center position of the coated particle array arrangement device, the platform moves layer by layer from the inside out, with each module as a unit. During the movement of the sample platform, all coated particles of the coated particle array arrangement device are presented one by one within the field of view of the first lens, with each module as a unit.

[0008] Optionally, the online non-destructive testing system for coating particle thicknesses further includes: a first base and a second base arranged perpendicularly to each other, wherein the first base is placed parallel to a horizontal plane; an imaging component and a first motion platform disposed on the second base, the imaging component being disposed on the first motion platform, the first motion platform being allowed to move vertically along the second base, and the first motion platform driving the imaging component to move vertically along the second base; a sample stage and an X-ray tube assembly disposed on the second base; and a controller disposed on the first base, the controller controlling the movement of the sample stage and the X-ray tube assembly.

[0009] Optionally, the controller controls the three-dimensional movement of the sample stage. The sample stage includes a second motion platform and a third motion platform, wherein the third motion platform is vertically connected to the second motion platform. The third motion platform is disposed on the second base and is allowed to move vertically along the second base. The third motion platform drives the second motion platform to move vertically along the second base. The second motion platform is allowed to move horizontally perpendicular to the second base. A coated particle array arrangement device is placed on the second motion platform. An X-ray tube assembly is disposed on the third motion platform. The controller controls the third motion platform to move vertically along the second base, thereby driving the X-ray tube assembly to move vertically along the second base.

[0010] Optionally, the robotic arm is mounted on the second base and connected to the controller. The feed hopper includes a feed hopper and a discharge hopper. The controller controls the robotic arm to pick up coated particles from the feed hopper and place them into the small holes of the coated particle array arrangement device, and to pick up the coated particles one by one from the coated particle array arrangement device and place them into the discharge hopper.

[0011] A second aspect of this application provides an online non-destructive testing method for the thickness of each layer of coated particles. The method is applied to the online non-destructive testing system of the first aspect for the thickness of each layer of coated particles. The method includes: sending a first position command and a first lens imaging command to a controller; the controller moves a sample stage to a first target position according to the first position command; acquiring an image captured by the first lens according to the first lens imaging command; using the image range captured by the first lens as a module, identifying the center position of the module, using the center position as the starting position of a second lens, and sending a second position command and a second lens imaging command to the controller; the controller controls the sample stage according to the second position command to follow a pre-configured first... The movement trajectory moves the second lens from its starting position, scanning the coated particles according to the target scanning trajectory. The second lens acquires images according to the second lens's shooting command. After the second lens completes the imaging of all coated particles within the module, it sends a next position command and a first lens shooting command to the controller according to the pre-configured second movement trajectory. The controller moves the sample stage to the next target position according to the next position command, repeating the above steps at the next target position to acquire images from the second lens until the second lens completes the imaging of all coated particles within the coated particle array arrangement device. The contours of each coating layer of the coated particles in the images captured by the second lens are identified, and the coating layer thickness is determined based on the distance between the coating layer contours.

[0012] A third aspect of this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the online non-destructive testing method of the second aspect for the thickness of each layer of coated particles.

[0013] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the online non-destructive testing method of the second aspect for the thickness of each layer of coated particles.

[0014] The fifth aspect of this application provides a computer program product, including a computer program that, when executed by a processor, implements the online non-destructive testing method for the thickness of each layer of coated particles as described in the second aspect.

[0015] Therefore, this application has the following beneficial effects: The processor in this embodiment is configured to execute: sending a first position command and a first lens imaging command to the controller; the controller moves the sample stage to a first target position according to the first position command; and acquires an image captured by the first lens according to the first lens imaging command; using the image range captured by the first lens as a module, identifying the center position of the module, and using the center position as the starting position of the second lens; sending a second position command and a second lens imaging command to the controller; the controller controls the sample stage to move according to a pre-configured first movement trajectory according to the second position command, so that the second lens starts from the starting position and scans the coated particles according to the target scanning trajectory; and acquires an image captured by the second lens according to the second lens imaging command; and completes the second lens imaging within the module. After all coated particles are photographed, a next position command and a first lens imaging command are sent to the controller according to a pre-configured second movement trajectory. The controller moves the sample stage to the next target position according to the next position command, and repeats the above steps at the next target position to acquire images captured by the second lens until the second lens has completed the photographing of all coated particles in the coated particle array arrangement device. Finally, the contour of each coating layer of each coated particle in the image captured by the second lens is identified, and the coating layer thickness is determined based on the distance between each coating layer contour. Based on the principle of microfocus X-ray imaging, non-destructive detection is achieved, the particles are easy to recover, no radioactive waste is generated, and it is suitable for online automated detection on the production line. The detection efficiency and accuracy are high, and the repeatability is good. Thus, it solves the problem that related technologies do not consider detection efficiency and are difficult to realize online detection of a large number of coated particles in nuclear fuel element production lines.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of an online non-destructive testing system for the thickness of each layer of coated particles, according to an embodiment of this application. Figure 2 This is an example diagram of the coated particle array arrangement device provided according to an embodiment of this application; Figure 3 This is a structural diagram of an online non-destructive testing system for the thickness of each layer of coated particles according to an embodiment of this application; Figure 4 This is a flowchart illustrating an online non-destructive testing method for the thickness of each layer of coated particles according to an embodiment of this application; Figure 5 Here is a flowchart illustrating a detection method according to an embodiment of this application; Figure 6 This is a first lens scan trajectory diagram provided according to an embodiment of this application; Figure 7 This is a second lens scanning trajectory diagram provided according to an embodiment of this application; Figure 8 This is a schematic diagram of the structure of a computer device provided according to an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures: 10-Online non-destructive testing device for the thickness of each layer of coated particles; 101-Sample stage; 1011-Second motion platform; 1012-Third motion platform; 102-Imaging component; 1021-Acquisition component; 1022-Objective lens component; 10221-First lens; 10222-Second lens; 103-X-ray tube component; 104-Controller; 1051-Robot arm; 1052-Infeed / Outfeed hopper; 106-Processor; 107-Base; 108-First motion platform; 20-Coated particle array arrangement device. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0020] The following description, with reference to the accompanying drawings, describes an online non-destructive testing system, method, and apparatus for the thickness of each layer of coated particles according to embodiments of this application. Addressing the problem mentioned in the background art that the related technologies do not consider testing efficiency and are difficult to implement online testing of large quantities of coated particles in nuclear fuel element production lines, this application provides an online non-destructive testing system for the thickness of each layer of coated particles. In this system, a first position command and a first lens imaging command are sent to a controller. The controller moves the sample stage to a first target position according to the first position command and acquires an image captured by the first lens according to the first lens imaging command. The image range captured by the first lens is used as a module, and the center position of the module is identified. The center position is used as the starting position of the second lens, and a second position command and a second lens imaging command are sent to the controller. The controller controls the sample stage to move according to a pre-configured first movement trajectory according to the second position command, so that the second lens starts scanning from the starting position according to the target scanning trajectory. The coated particles are imaged by the second lens according to the second lens's imaging command. After the second lens completes imaging of all coated particles within the module, it sends a next position command and a first lens imaging command to the controller according to a pre-configured second movement trajectory. The controller moves the sample stage to the next target position according to the next position command, and repeats the above steps at the next target position to acquire images from the second lens until the second lens completes imaging of all coated particles within the coated particle array arrangement device. The contours of each coating layer of the coated particles in the images captured by the second lens are identified, and the coating layer thickness is determined based on the distance between each coating layer contour. Based on the micro-focus X-ray imaging principle, non-destructive detection is achieved. The particles are easy to recover, no radioactive waste is generated, and it is suitable for online automated detection on production lines. It has high detection efficiency and accuracy, and good repeatability. Thus, it solves the problem that related technologies do not consider detection efficiency and are difficult to realize online detection of large numbers of coated particles in nuclear fuel element production lines.

[0021] Specifically, Figure 1 This is a schematic diagram of an online non-destructive testing system for the thickness of each layer of coated particles, provided in an embodiment of this application.

[0022] like Figure 1 As shown, the online non-destructive testing system for the thickness of each layer of coated particles includes: a sample stage 101, an imaging component 102, a data acquisition component 1021, an objective lens component 1022, a first lens 10221, a second lens 10222, an X-ray tube component 103, a controller 104, a loading and unloading unit 105, a robotic arm 1051, an inlet and outlet hopper 1052, and a processor 106.

[0023] The sample stage 101 is used to place the coated particle array arrangement device; the imaging component 102 is used to capture and acquire images of the coated particle array arrangement device, wherein the imaging component 102 includes an acquisition component 1021 and an objective lens component 1022, the objective lens component 1022 includes a first lens 10221 and a second lens 10222, the imaging field of view of the first lens 10221 is larger than the imaging field of view of the second lens 10222; the X-ray tube assembly 103 is used to emit X-rays that penetrate the particle array arrangement device, and the imaging component 102 acquires the X-rays that have passed through the particle array arrangement device; The unloading unit 105 includes a robotic arm 1051 and an inlet / outlet hopper 1052. The unloading unit 105 is used to place or remove coated particles from the sample stage 101. The controller 104 controls the movement of the sample stage 101 and the imaging component 102. The processor 106 is configured to execute the following steps: send a first position command and a first lens 10221 shooting command to the controller 104; the controller 104 moves the sample stage 101 to a first target position according to the first position command; and acquires the image captured by the first lens 10221 according to the first lens 10221 shooting command. The image range captured by the first lens 10221 is used as a module. The center position of the module is identified and used as the starting position of the second lens 10222. A second position command and a second lens 10222 shooting command are sent to the controller 104. The controller 104 controls the sample stage 101 to move according to the pre-configured first moving trajectory according to the second position command, so that the second lens 10222 starts from the starting position and scans the coated particles according to the target scanning trajectory. The image captured by the second lens 10222 is acquired according to the second lens 10222 shooting command. After the second lens 10222 finishes its shooting, the image is captured by the second lens 10222. After all the coated particles in the module are photographed, according to the pre-configured second movement trajectory, the next position command and the first lens 10221 shooting command are sent to the controller 104. The controller 104 moves the sample stage 101 to the next target position according to the next position command. The above steps are repeated at the next target position to acquire the image captured by the second lens 10222 until the second lens 10222 completes the photographing of all the coated particles in the coated particle array arrangement device. The coating layer outline of the coated particles in the image captured by the second lens 10222 is identified, and the coating layer thickness is determined according to the distance between the coating layer outlines.

[0024] Among them, the coated particle array arrangement device is a device used to orderly arrange and fix multiple coated particles to facilitate subsequent detection or processing, such as... Figure 2 As shown, the coated particle array arrangement device 20 of this application embodiment adopts an 18-hole × 18-hole array, with a total of 324 small holes. The hole positions are designed in a bowl shape, which can hold 324 particles; as Figure 3As shown, the imaging component 102 includes an acquisition component 1021 and an objective lens component 1022. The objective lens component 1022 includes a first lens 10221 and a second lens 10222. The acquisition component 1021 is a CCD (Charge-Coupled Device) detector, which is a device that converts optical signals into electrical signals. During the imaging process, it can receive X-rays that have passed through the coated particle array arrangement device 2020 and convert them into digital images. The first lens 10221 is a wide field-of-view lens, which can capture overall images with a large field of view. The second lens 10222 is a high-resolution lens with a smaller field of view but higher resolution, which can capture clear local images.

[0025] It is understood that the sample stage 101 in this embodiment is used to place the coated particle array arrangement device 20. The imaging component 1021 is responsible for capturing and acquiring images after passing through the particle array arrangement device via the X-ray tube assembly 103. Specifically, the acquisition component 1021 receives the X-rays after passing through the coated particle array arrangement device 2020 and converts them into digital images. The controller controls the movement of the imaging component 102, while the processor 106 performs the following steps: sending a first position command and a first lens shooting command to the controller 104; the controller 104 moves the sample stage 101 to a first target position according to the first position command; controlling the first lens 10221 to capture and acquire a wide-field image at the first target position according to the first lens shooting command; using this image as a module; identifying the center position of the module; and then sending a second position command and a second lens shooting command to the controller 104 to switch to the second lens 10222; the controller 104 controls the sample stage 102 according to the second position command. 01. The second lens 10222 moves according to the pre-configured first moving trajectory, starting from the center position and scanning the coated particles according to the target scanning trajectory. It also performs high-resolution imaging according to the second lens imaging command. After the second lens 10222 completes the imaging of all coated particles in the module, it sends the next position command and the first lens imaging command to the controller 104 according to the pre-configured second moving trajectory. The controller 104 moves the sample stage 101 to the next target position according to the next position command. The above steps are repeated at the next target position, and so on, until the second lens 10222 has acquired imaging of all coated particles in the coated particle array arrangement device. Finally, the processor 106 identifies the contour of each coating layer of the coated particles captured by the second lens 10222 and determines the coating layer thickness according to the distance between each coating layer contour. Through the cooperation of each component in the above steps, the efficient detection of the thickness of each layer of coated particles is achieved, and the whole process does not require damage to the sample, which greatly improves the detection efficiency and accuracy.

[0026] In this embodiment, the processor 106 is pre-configured with an image recognition algorithm, which is used to identify the center position of the module on the particle array arrangement device in the image captured by the first lens 10221, and to identify the outline of each coating layer of the coated particles in the image captured by the second lens 10222.

[0027] Among them, the image recognition algorithm is a calculation method and logic preset in the processor 106, which is used to automatically analyze the image content. For example, the Canny algorithm (a widely used edge detection algorithm) can effectively identify the contours of each layer of the coating particles so as to determine the thickness of each layer based on the distance between these contours; the module refers to the area captured by the first lens in a single shot, and this module is the working area for the movement and shooting of the second lens.

[0028] It is understood that the processor 106 in this embodiment of the application is pre-configured with an image recognition algorithm. The image recognition algorithm can analyze and understand the image content. First, a wide-field image is captured by the first lens 10221. The area covered by this image is the module. The image recognition algorithm in the processor 106 determines the center position of the module on the particle array arrangement device. Then, the second lens 10222 is switched to perform higher resolution imaging of the particles. Using the image recognition algorithm, the processor 106 can identify the contours of each coating layer of the particles. Based on these contour information, further calculations can be performed to obtain the thickness of each layer. Thus, with the help of the image recognition algorithm, efficient and accurate detection of the thickness of each coating layer of the particles can be achieved.

[0029] In this embodiment, the processor 106 is pre-configured with a first moving trajectory and a second moving trajectory for the sample stage 101. The pre-configured first moving trajectory is as follows: starting from the center position of the module, the sample stage 101 moves layer by layer from the inside out, with each coated particle as a unit. During the movement of the sample stage 101, all coated particles in the module are presented one by one within the field of view of the second lens 10222. The pre-configured second moving trajectory is as follows: starting from the module at the center position of the coated particle array arrangement device 20, the sample stage 101 moves layer by layer from the inside out, with each module as a unit. During the movement of the sample stage 101, all coated particles in the coated particle array arrangement device 20 are presented one by one within the field of view of the first lens 10221, with each module as a unit.

[0030] It is understood that the processor 106 in this embodiment of the application pre-sets two movement trajectories for the sample stage 101: the first movement trajectory starts from the center of the module and moves in a layer-by-layer manner from the inside out, so that each coated particle in the module enters the field of view of the second lens 10222 in sequence; the second movement trajectory starts from the module at the center of the coated particle array arrangement device 20 and moves layer by layer from the inside out, with the entire module as the unit, so that each module in the coated particle array arrangement device 20 enters the field of view of the first lens 10221 in sequence, thereby realizing the imaging observation of coated particles.

[0031] In the embodiments of this application, such as Figure 3 As shown, the system in this embodiment of the application further includes: a first base and a second base arranged perpendicularly to each other, wherein the first base is placed parallel to a horizontal plane; an imaging component 102 and a first motion platform 108 disposed on the second base, the imaging component 102 being disposed on the first motion platform 108, the first motion platform 108 being allowed to move vertically along the second base, the first motion platform 108 driving the imaging component 102 to move vertically along the second base; a sample stage 101 and an X-ray tube assembly 103 disposed on the second base; and a controller 104 disposed on the first base, the controller 104 controlling the movement of the sample stage 101 and the X-ray tube assembly 103.

[0032] Among them, such as Figure 3 As shown in the figure, the base 107 consists of two mutually perpendicular parts, namely the first base and the second base. The two serve as the basic support structure of the system and are set perpendicular to each other. The first base is placed perpendicular to the horizontal plane, and the second base is perpendicular to it. It is used to install the various components of the system and ensure that these components can work stably.

[0033] It is understood that the imaging component 102 and the sample stage 101 are mounted on the second base. At the same time, the imaging component 102 can move vertically along the second base by being driven by the first motion platform 108. The controller 104 is set on the first base and can control the movement of the sample stage 101 and the X-ray tube assembly 103. This layout design allows the imaging component 102 to be precisely positioned and moved on the second base, thereby realizing the adjustment of the distance between the imaging component 102 and the sample stage 101 as needed. Meanwhile, the controller 104 is set on a separate base, which can effectively coordinate the various actions in the entire detection process, realizing an efficient and accurate automated detection process.

[0034] In this embodiment, the controller 104 controls the three-dimensional movement of the sample stage 101. The sample stage 101 includes a second motion platform 1011 and a third motion platform 1012. The third motion platform 1012 is vertically connected to the second motion platform 1011. The third motion platform 1012 is disposed on a second base and is allowed to move vertically along the second base. The third motion platform 1012 drives the second motion platform 1011 to move vertically along the second base. The second motion platform 1011 is allowed to move horizontally perpendicular to the second base. The coated particle array arrangement device 20 is placed on the second motion platform 1011. The X-ray tube assembly 103 is disposed on the third motion platform 1012. The controller controls the third motion platform 1012 to move vertically along the second base, thereby driving the X-ray tube assembly 103 to move vertically along the second base.

[0035] The third motion platform 1012 and the second motion platform 1011 constitute the three-dimensional movement mechanism of the sample stage 101. The third motion platform 1012 is mainly used for movement in the vertical direction (i.e., the Z-axis), while the second motion platform 1011 moves in the horizontal plane (i.e., the X-axis and Y-axis). At the same time, the third motion platform 1012 can drive the X-ray tube assembly 103 to move in the vertical direction along the second base.

[0036] It is understood that the controller 104 in this embodiment controls the sample stage 101 to move in three dimensions. The sample stage 101 consists of a third motion platform 1012 and a second motion platform 1011, which are vertically arranged and connected. The third motion platform 1012 is mounted on a second base and can move vertically along the second base under the control of the controller 104, thereby driving the second motion platform 1011 connected to it to move up and down. The second motion platform 1011 is allowed to move freely in a horizontal plane perpendicular to the second base. Through the vertical movement of the third motion platform 1012 and the horizontal movement of the second motion platform 1011, the sample stage 101 is accurately positioned in three-dimensional space. At the same time, it drives the X-ray tube assembly 103 to move vertically along the second base, ensuring that each coated particle can be accurately positioned and imaged. This supports efficient and accurate detection of each layer thickness, ensuring the flexibility and accuracy of the system, and is suitable for the needs of automated online detection.

[0037] In the embodiments of this application, such as Figure 3As shown, the loading and unloading unit includes a robot arm 1051 and an inlet / outlet hopper 1052. The robot arm 1051 is mounted on the second base and is connected to the controller 104. The inlet / outlet hopper 1052 includes an inlet hopper and an outlet hopper. The controller 104 controls the robot arm 1051 to pick up coated particles from the inlet hopper and place them into the small holes of the coated particle array arrangement device, and to pick up the coated particles one by one from the coated particle array arrangement device and place them into the outlet hopper.

[0038] Among them, the robotic arm 1051 is an automated device that can perform precise actions under the instructions of the controller 104, such as picking up, moving and placing objects; it should be noted that the feed bin and the discharge bin have the same structure and their positions can be interchanged.

[0039] It is understood that the loading and unloading unit in this embodiment includes a robotic arm 1051, an infeed bin, and an outfeed bin. The robotic arm 1051 is mounted on a second base and connected to a controller 104. The controller 104 controls the robotic arm 1051 to complete a series of actions: picking up coated particles from the infeed bin and placing them into the small holes of the coated particle array arrangement device 20, so that they are accurately placed on the sample stage 101 for testing; after the testing is completed, the coated particles are picked up one by one from the coated particle array arrangement device 20 and placed into the outfeed bin. Through this mechanism, the loading and unloading and particle placement are automated, as well as the online non-destructive testing process for coated particles is achieved, while reducing the need for manual intervention and improving the overall work efficiency.

[0040] An online non-destructive testing system for the thickness of each layer of coated particles, according to an embodiment of this application, includes: a sample stage, an imaging component, an X-ray tube assembly, a loading and unloading unit, a controller, and a processor. The processor is configured to execute: sending a first position command and a first lens imaging command to the controller; the controller moves the sample stage to a first target position according to the first position command; and acquires an image captured by the first lens according to the first lens imaging command; using the image range captured by the first lens as a module, identifying the center position of the module, and using the center position as the starting position of the second lens; and sending a second position command and a second lens imaging command to the controller; and the controller controls the sample stage to move according to a pre-configured first movement trajectory according to the second position command, so that the second lens scans the coated particles from the starting position according to the target scanning trajectory. The system acquires images captured by the second lens according to the second lens shooting command; after the second lens completes the shooting of all coated particles in the module, it sends the next position command and the first lens shooting command to the controller according to the pre-configured second movement trajectory. The controller moves the sample stage to the next target position according to the next position command, and repeats the above steps at the next target position to acquire images captured by the second lens until the second lens completes the shooting of all coated particles in the coated particle array arrangement device; it identifies the contour of each coating layer of the coated particles in the image captured by the second lens, and determines the coating layer thickness according to the distance between the coating layer contours. Based on the micro-focus X-ray imaging principle, it realizes non-destructive detection, the particles are easy to recycle, no radioactive waste is generated, and it is suitable for online automated detection on the production line. It has high detection efficiency and accuracy, and good repeatability.

[0041] Based on the above embodiments of the online non-destructive testing system for the thickness of each layer of coated particles, the online non-destructive testing method for the thickness of each layer of coated particles according to embodiments of this application will now be described with reference to the accompanying drawings. Figure 4 As shown, the method includes the following steps: In step S201, a first position command and a first lens shooting command are sent to the controller. The controller moves the sample stage to the first target position according to the first position command and acquires the image captured by the first lens according to the first lens shooting command.

[0042] It is understood that, in the embodiments of this application, the processor can send a first position command and a first lens shooting command to the controller. After receiving the command, the controller first controls the sample stage to move to the designated first target position, and then triggers the first lens to perform image acquisition, obtain the shooting image at that position, and transmit the acquired image back to the processor for subsequent analysis. In this way, a wide-angle overall image can be obtained, so as to accurately locate each individual coated particle and perform detailed detection.

[0043] In step S202, the image range captured by the first lens is taken as a module, the center position of the module is identified, the center position is taken as the starting position of the second lens, and a second position command and a second lens shooting command are sent to the controller. The controller controls the sample stage to move according to the pre-configured first moving trajectory according to the second position command, so that the second lens starts from the starting position and scans the coated particles according to the target scanning trajectory, and acquires the image captured by the second lens according to the second lens shooting command.

[0044] It is understood that the embodiments of this application can identify the image captured by the first lens in the previous step as a module, identify the center position of the module, and determine it as the starting point of the second lens scanning. Subsequently, the processor sends a second position command and a second lens shooting command to the controller. The controller controls the sample stage to move along the first moving trajectory according to the command, so that the second lens covers the coated particles one by one from the starting position according to the predetermined scanning path. At the same time, the controller controls the second lens to capture images according to the second lens shooting command, so as to realize fine scanning imaging of the particles in the module, and at the same time ensure that each coated particle can be accurately placed in the optimal imaging area of ​​the second lens.

[0045] In step S203, after the second lens completes the imaging of all coated particles in the module, according to the pre-configured second movement trajectory, the next position command and the first lens imaging command are sent to the controller. The controller moves the sample stage to the next target position according to the next position command, and repeats the above steps at the next target position to obtain the image captured by the second lens until the second lens completes the imaging of all coated particles in the coated particle array arrangement device.

[0046] It is understood that, in this embodiment of the application, after the second lens completes the imaging of all coated particles in the current module, the processor sends the next position command and the first lens imaging command to the controller according to the preset second movement trajectory. The controller then moves the sample stage to the next target position and triggers the first lens to take an image. Subsequently, the aforementioned steps of identifying the center of the module, generating the starting position of the second lens, and controlling the sample stage to scan according to the first movement trajectory are repeated, and the process is advanced module by module until the second lens completes the image acquisition of all coated particles in the entire coated particle array arrangement device.

[0047] In step S204, the outlines of each coating layer of the coated particles in the image captured by the second lens are identified, and the coating layer thickness is determined based on the distance between each coating layer outline.

[0048] It is understood that the embodiments of this application can use image recognition algorithms to analyze high-resolution images captured by the second lens to identify the contours of each coating layer of the coated particles. Based on these contour information, the distance between adjacent coating layers is calculated, thereby determining the specific thickness of each layer. This not only ensures the accuracy of the measurement, but also achieves efficient and non-destructive testing of a large number of coated particles.

[0049] It should be noted that the foregoing explanation of the online non-destructive testing system embodiment for the thickness of each layer of coated particles also applies to the online non-destructive testing method for the thickness of each layer of coated particles in this embodiment, and will not be repeated here.

[0050] According to the embodiments of this application, the online non-destructive testing method for the thickness of each layer of coated particles can send the position and shooting command of the first lens to the controller. The controller controls the first lens to move and acquire the image it captures. The center position of the particle array arrangement device is identified. Starting from this position, the position and shooting command of the second lens are sent to the controller. The controller controls the second lens to move and acquire the image it captures. The outline of each coating layer of the coated particles in the module image captured by the second lens is identified one by one. The coating layer thickness is determined according to the distance between each coating layer outline. Based on the micro-focus X-ray imaging principle, non-destructive testing is achieved. The particles are easy to recycle, no radioactive waste is generated, and it is suitable for online automated testing on the production line. The testing efficiency and accuracy are high, and the repeatability is good.

[0051] The following is a specific embodiment of the online non-destructive testing method for the thickness of each layer of coated particles, based on... Figure 3 The online non-destructive testing system for the thickness of each layer of coated particles is shown. The testing method and process are as follows: Figure 5 As shown, the parameters of each component are set as follows: X-ray tube source voltage 80 kV, tube current 50 µA, focal spot size 5 µm, exposure time 35 s, distance between the particle to be inspected and the detector 1.25 mm, and distance between the X-ray source and the detector 20 mm; the particle coating array arrangement device adopts an 18-hole × 18-hole array with a total of 324 holes, the hole positions are designed in a bowl shape, and can hold 324 particles. The detection method includes the following steps: Step S301: Place the sample.

[0052] The robotic arm 1051 picks up the particles one by one from the feed hopper and puts them into the small holes of the particle array arrangement device.

[0053] Step S302: Use the first lens 10221 to capture images of the first area.

[0054] The center of the coated particle array arrangement device is automatically located and the starting point is marked by an image recognition algorithm.

[0055] Step S303: The program automatically locates the target in the area.

[0056] The first lens 10221 was used to perform a global scan of the first area.

[0057] Step S304: Move to the marked starting point position.

[0058] The second motion platform 1011 moves to the starting point of the first region.

[0059] Step S305: Use the second lens 10222 (20X) to scan and image one by one.

[0060] Switch to the second lens 10222 to scan and image the coated particles one by one according to the module center trajectory. The computer image processing algorithm fits the inner and outer diameters of each coating layer on the acquired image and obtains the thickness of each layer according to the shortest distance between the inner and outer diameters.

[0061] Step S306: The second motion platform 1011 moves to the starting point of the next area and repeats the imaging of the first lens 10221 and the second lens 10222, as well as the identification of the inner and outer diameters and the measurement of the thickness of each layer.

[0062] Step S307: Complete the test.

[0063] The testing is completed after the thickness of each layer of all coated particles has been measured.

[0064] The image capture process in this embodiment is as follows: First, the field of view of the coated particle array device (18 holes × 18 holes) is imaged using the first lens 10221 (2x objective lens) to obtain the coated particle module (3 holes × 3 holes). Then, the particles within the module are automatically scanned one by one using the second lens 10222 (10x objective lens, which has a smaller and clearer field of view than the first lens). The sample stage 101 can adjust any position of the coated particle module (3 holes × 3 holes) on the coated particle array device to the center of the scanning field of view by adjusting the second motion platform 1011. The scanning trajectory of the first lens 10221 is as follows: Figure 6 As indicated by the arrow, this type of sample stage 101 has the shortest moving distance and the highest detection efficiency; the scanning trajectory of the second lens 10222 is as follows. Figure 7 As indicated by the arrow, this type of sample stage 101 has the shortest moving distance and the highest detection efficiency.

[0065] Detection efficiency: Based on actual time measurements, the X-ray method achieves an efficiency of 10⁶ particles / hour for detecting the thickness of each layer of TRISO-coated particles, while the metallographic method achieves 42 particles / hour. The X-ray method demonstrates significantly higher efficiency, exceeding that of the traditional metallographic method by more than 2.5 times.

[0066] The accuracy of the results of this embodiment is evaluated below: X-ray method and metallographic method were used to detect the thickness of each layer of 324 coated particles in the same batch, and the test results of the two methods were compared. The comparison results are shown in Table 1. Table 1 shows the average value and standard deviation of the thickness of each layer of coated particles measured by the two detection methods.

[0067] Table 1

[0068] Calculate the relative deviation of the average thickness of each layer of coated particles in each batch measured by the two detection methods (=|X-ray method) The results (metallographic method | / metallographic method × 100%) are shown in Table 2. As can be seen from the table, the relative deviation of the average layer thickness measured by the two methods is small, within 1.3%. Within the range of 3.3%, this indicates that the data obtained by the X-ray method is close to that obtained by the metallographic method, and the results are relatively accurate and reliable. Table 2 shows the relative deviation of the average thickness of each layer obtained by the X-ray method and the metallographic method.

[0069] Table 2

[0070] The coefficient of variation (= standard deviation / mean value × 100%) was used to reflect the dispersion of the coating particle thickness data obtained by the two detection methods, as shown in Table 3. It is worth noting that because the thicknesses of the four coating layers differ, the standard deviation is not suitable as a direct measure of data dispersion. The coefficient of variation, being the ratio of the standard deviation to the mean value, eliminates the influence of measurement scale and dimensions, and can more objectively reflect the data dispersion. Table 3 shows that the average coefficient of variation for the X-ray method is lower than that for the metallographic method, at 0.079 and 0.081 respectively. This indicates that the dispersion of the X-ray method results is less than that of the metallographic method. Table 3 presents the coefficient of variation for the data obtained by the X-ray method and the metallographic method.

[0071] Table 3

[0072] To verify the repeatability of the X-ray method test results in this embodiment, the thickness of each layer of the 324 coated particles in this batch was repeatedly tested 6 times. The test results for each number of tests, the average value, and the standard deviation are recorded in Table 4. As can be seen from the table, the standard deviation between the test results of each layer thickness at different numbers of tests is small, with a maximum of no more than 0.1 μm. This indicates that the data obtained by this method is relatively stable and has good repeatability. Table 4 shows the data measured using the rapid analysis and detection system for the thickness of each layer of coated particles.

[0073] Table 4

[0074] Figure 8 A schematic diagram of the structure of a computer device provided in an embodiment of this application. The computer device may include: The memory 401, the processor 402, and the computer program stored on the memory 401 and capable of running on the processor 402.

[0075] When the processor 402 executes the program, it implements the online non-destructive testing method for the thickness of each layer of coated particles provided in the above embodiments.

[0076] Furthermore, computer equipment also includes: Communication interface 403 is used for communication between memory 401 and processor 402.

[0077] The memory 401 is used to store computer programs that can run on the processor 402.

[0078] The memory 401 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0079] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0080] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0081] Processor 402 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0082] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described online non-destructive testing method for the thickness of each layer of coated particles.

[0083] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described online non-destructive testing method for the thickness of each layer of coated particles.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0087] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any of the following techniques known in the art, or a combination thereof: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0088] Those skilled in the art will understand that all or part of the steps of the methods implementing the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0089] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An online non-destructive testing system for the thickness of each layer of coated particles, characterized in that, include: A sample stage for placing the coated particle array arrangement device; An imaging component is used to capture and acquire images of the coated particle array arrangement device. The imaging component includes an objective lens assembly and an acquisition component. The objective lens assembly includes a first lens and a second lens. The imaging field of view of the first lens is greater than that of the second lens. An X-ray tube assembly is used to emit X-rays that penetrate the particle array arrangement device, and the imaging assembly collects the X-rays that have passed through the particle array arrangement device; The loading and unloading unit is used to put the coated particles into or remove them from the sample stage. The loading and unloading unit includes a robotic arm and an inlet / outlet hopper. A controller is used to control the movement of the sample stage and the imaging component; The processor is configured to perform the following steps: A first position command and a first lens shooting command are sent to the controller. The controller moves the sample stage to a first target position according to the first position command and acquires an image captured by the first lens according to the first lens shooting command. The image range captured by the first lens is taken as a module, the center position of the module is identified, and the center position is taken as the starting position of the second lens. A second position command and a second lens shooting command are sent to the controller. The controller controls the sample stage to move according to a pre-configured first moving trajectory according to the second position command, so that the second lens starts from the starting position and scans the coated particles according to the target scanning trajectory. The image captured by the second lens is obtained according to the second lens shooting command. After the second lens completes the imaging of all coated particles in the module, according to the pre-configured second movement trajectory, the next position command and the first lens imaging command are sent to the controller. The controller moves the sample stage to the next target position according to the next position command. The above steps are repeated at the next target position to obtain the image captured by the second lens until the second lens completes the imaging of all coated particles in the coated particle array arrangement device. Identify the outlines of each coating layer of the coated particles in the image captured by the second lens, and determine the coating layer thickness based on the distance between each coating layer outline.

2. The online non-destructive testing system for the thickness of each layer of coated particles according to claim 1, characterized in that, The processor is pre-configured with an image recognition algorithm, which is used to identify the center position of the module on the particle array arrangement device in the image captured by the first lens, and to identify the outline of each coating layer of the particles in the image captured by the second lens.

3. The online non-destructive testing system for the thickness of each layer of coated particles according to claim 1, characterized in that, The processor is pre-configured with a first movement trajectory and a second movement trajectory for the sample platform, wherein the pre-configured first movement trajectory is: Starting from the center of the module, the sample stage moves layer by layer from the inside out along a trajectory, with each coated particle as a unit. During the movement of the sample stage, all coated particles in the module are presented one by one within the field of view of the second lens. The pre-configured second movement trajectory is: Starting from the module at the center of the coated particle array arrangement device, the sample stage moves layer by layer from the inside out, module by module. During the movement of the sample stage, all the coated particles of the coated particle array arrangement device are presented one by one in the field of view of the first lens, module by module.

4. The online non-destructive testing system for the thickness of each layer of coated particles according to claim 1, characterized in that, Also includes: A first base and a second base are arranged perpendicularly to each other, wherein the first base is placed parallel to the horizontal plane; An imaging component and a first motion platform are disposed on the second base. The imaging component is disposed on the first motion platform. The first motion platform allows the imaging component to move vertically along the second base. The first motion platform drives the imaging component to move vertically along the second base. A sample stage and an X-ray tube assembly are mounted on the second base, and a controller is mounted on the first base, the controller controlling the movement of the sample stage and the X-ray tube assembly.

5. The online non-destructive testing system for the thickness of each layer of coated particles according to claim 4, characterized in that, The controller controls the three-dimensional movement of the sample stage. The sample stage includes a second motion platform and a third motion platform, wherein the third motion platform is vertically connected to the second motion platform. The third motion platform is disposed on the second base and is allowed to move vertically along the second base. The third motion platform drives the second motion platform to move vertically along the second base. The second motion platform is allowed to move horizontally perpendicular to the second base. A coated particle array arrangement device is placed on the second motion platform. The X-ray tube assembly is disposed on the third motion platform. The controller controls the third motion platform to move vertically along the second base, thereby driving the X-ray tube assembly to move vertically along the second base.

6. The online non-destructive testing system for the thickness of each layer of coated particles according to claim 1 or 4, characterized in that, The robotic arm is mounted on the second base and is connected to the controller. The feed hopper includes a feed hopper and a discharge hopper. The controller controls the robotic arm to pick up coated particles from the feed hopper and place them into the small holes of the coated particle array arrangement device, and to pick up the coated particles one by one from the coated particle array arrangement device and place them into the discharge hopper.

7. An online non-destructive testing method for the thickness of each layer of coated particles, characterized in that, The method is applied to the online non-destructive testing system for the thickness of each layer of coated particles as described in any one of claims 1-6, wherein the method includes: A first position command and a first lens shooting command are sent to the controller. The controller moves the sample stage to a first target position according to the first position command and acquires an image captured by the first lens according to the first lens shooting command. The image range captured by the first lens is taken as a module, the center position of the module is identified, and the center position is taken as the starting position of the second lens. A second position command and a second lens shooting command are sent to the controller. The controller controls the sample stage to move according to a pre-configured first moving trajectory according to the second position command, so that the second lens starts from the starting position and scans the coated particles according to the target scanning trajectory. The image captured by the second lens is obtained according to the second lens shooting command. After the second lens completes the imaging of all coated particles in the module, according to the pre-configured second movement trajectory, the next position command and the first lens imaging command are sent to the controller. The controller moves the sample stage to the next target position according to the next position command. The above steps are repeated at the next target position to obtain the image captured by the second lens until the second lens completes the imaging of all coated particles in the coated particle array arrangement device. Identify the outlines of each coating layer of the coated particles in the image captured by the second lens, and determine the coating layer thickness based on the distance between each coating layer outline.

8. A computer device, characterized in that, include: The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the online non-destructive testing method for the thickness of each layer of coated particles as described in claim 7.

9. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, they implement the online non-destructive testing method for the thickness of each layer of coated particles as described in claim 7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the online non-destructive testing method for the thickness of each layer of coated particles as described in claim 7.

Images