Grating adjusting method and system

Abstract

The invention discloses a grating adjusting method and system, and relates to the technical field of automatic nondestructive detection.The grating adjusting method comprises the steps that an information management system and a controller adjust a grating to a grating preset point position by controlling a grating opening and closing motor to act; and then the grating opening and closing motor is controlled to act, the grating is finely adjusted, and the grating is finely adjusted from the preset point position to the standard point position, so that the final grating point position is more accurate, the grating shields the small-diameter tube, and overexposure of the edge of the shot DR image caused by large edge X-ray transmission amount is avoided. The grating is firstly adjusted to the grating preset point position, opening and closing of the grating are adjusted to a relatively reasonable amount in advance for a pipe with a certain specification and pipe diameter, the time for adjusting the grating through dynamic collection image analysis subsequently is shortened, and the adjusting efficiency is improved. Automatic adjustment of grating opening and closing of pipes with different pipe diameters is realized, so that a DR image with normal transmission dose is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of automated nondestructive testing, and more specifically to a grating adjustment method and system in fully automated DR testing of small-diameter pipes. Background Art

[0002] Welding is a key process in the manufacturing of major power generation equipment, and its quality determines the safety and reliability of power generation equipment. According to external quality feedback over the years, more than 80% of the quality problems of power plant boilers are caused by weld quality. Therefore, effectively improving the welding quality of power plant boiler enterprises is very important to ensure production safety and help enterprises improve quality and efficiency.

[0003] In the petrochemical, energy and power, aerospace and other industries, small-diameter pipes (specifically pipes with a diameter of 100mm or less) are important parts of related equipment. The serpentine pipe is a small-diameter pipe and is a core component of power station boilers. The operating temperature is as high as 677℃ and the working pressure is 40MPa.

[0004] In the prior art, when X-ray imaging defect detection is performed on the serpentine and straight pipe welds of boiler high-temperature components, a DR imaging detection system (industrial television RTV for short) is required. Currently, all RTV systems in the industry are semi-automatic systems. During the DR flaw detection of small-diameter pipes, the grating opening and closing adjustment is required for pipes of different diameters to shield the light, so as to avoid overexposure of the edges of the captured DR images due to large X-ray transmission at the edges.

[0005] In the prior art, the grating opening and closing adjustment is performed manually, which is extremely inefficient and inaccurate. At the same time, long-term manual adjustment will cause visual fatigue, which is not conducive to the occupational health of professionals. Summary of the invention

[0006] In order to overcome the defects in the above-mentioned prior art, the present invention discloses a grating adjustment method and system, and the purpose of the present invention is to solve the problem of extremely low efficiency and inaccuracy in the manual adjustment of the grating in the prior art. The present invention uses an information management system, a controller and a grating opening and closing motor to pre-adjust the grating point position first, and then fine-tune the grating closure, thereby improving the grating adjustment efficiency and avoiding the problem that manual adjustment for a long time is not beneficial to the occupational health of professionals.

[0007] In order to achieve the above objectives, the technical solution adopted by the present invention is: A grating adjustment method comprises the following steps: 1. Grating point pre-adjustment S1. When detecting a small-diameter pipe of a certain diameter, the information management system sends a pre-adjustment instruction of the grating closing amount of the pipe of the corresponding diameter to the controller. The controller controls the grating opening and closing motor according to the pre-adjustment instruction of the grating closing amount of the pipe, and adjusts the grating to the preset grating point; Preferably, in step S1, before the preset position of the grating is adjusted, the grating is placed at the origin and is in a fully open state.

[0008] Preferably, in step S1, the tube grating closure amount is 2 cm larger than the corresponding standard grating closure amount.

[0009] In the present invention, before the image acquisition module acquires the DR image of the small-diameter tube, the grating is placed in a fully open state at the origin. The grating is closed mainly to block useless X-rays, and the amount of closure is mainly determined by the tube diameter. Different small-diameter tube diameter specifications and corresponding grating closure amounts are recorded in the information management system. The grating closure amounts of small-diameter tubes with different tube diameter specifications recorded by this information management system are 2 cm larger than the corresponding standard grating closure amounts. This is to enable the grating to reach the standard point position from the preset point position through subsequent fine-tuning closure, so as to achieve a more accurate final grating point position. When detecting a small-diameter tube of a certain diameter, the information management system sends the grating closure amount of the tube diameter specification to the controller, and the controller controls the grating opening and closing motor to move, so that the grating closes the corresponding amount, and the grating point position is pre-adjusted.

[0010] Preferably, in step S1, grating closure information of pipes with different specifications and diameters is set in the information management system.

[0011] In the present invention, the information management system is specifically R-PCE software in a computer, and the controller is a programmable logic controller PLC. The R-PCE software sets the grating closure information of pipes with different pipe diameters. For example, the pipe diameters are 38.1mm, 45mm, 51mm, 54mm, 57mm, and 60mm, and the corresponding grating closures are 5cm, 7.6cm, 10cm, 11.6cm, 13.3cm, and 15cm.

[0012] In the present invention, before DR image shooting, R-PCE communicates with PLC, and R-PCE sends a pre-adjustment instruction to PLC. PLC controls the rotation of the grating opening and closing motor to control the grating closing according to the pre-adjustment instruction. In this way, for a pipe of a certain diameter, the opening and closing of the grating is pre-adjusted to a relatively reasonable amount, which reduces the time for adjusting the grating through dynamic image acquisition analysis later and improves the adjustment efficiency.

[0013] In the present invention, the grating is specifically installed above the flat-panel detector and consists of two filter plates that can be opened and closed. The transmission amount of X-rays is controlled by the opening and closing amount of the two filter plates. Its function is to reduce scattered rays and useless X-rays and prevent overexposure or underexposure.

[0014] 2. DR Image Acquisition S2, after the grating is adjusted to the preset grating position, the image acquisition module acquires the DR image of the small-diameter tube; In the present invention, the image acquisition module is specifically a flat panel detector, which is installed under the grating and is used to receive X-rays and perform A / D conversion. The R-PCE software acquires the acquired DR image through the SDK call of the flat panel detector, wherein the flat panel detector and the computer are connected to the same local area network through a switch. The image acquisition module is controlled by the information management system.

[0015] 3. Gray value calculation S3, the image acquisition module sends the acquired small-diameter tube DR image to the information management system, and the information management system processes the small-diameter tube DR image to obtain the gray value of each pixel in the small-diameter tube DR image; Preferably, step S3 comprises the following steps: S31, the image acquisition module receives the X-ray signal transmitted through the weld, and performs photoelectric conversion and A / D conversion to generate a digital image; In the above steps, the flat panel detector receives the X-ray signal transmitted through the weld, and performs photoelectric conversion and A / D conversion to generate a digital image.

[0016] S32, the information management system obtains a 16-bit single-channel digital image by calling the SDK of the image acquisition module; In the above steps, the R-PCE software communicates with the flat panel detector and obtains a 16-bit single-channel digital image (DR image) by calling the SDK of the flat panel detector. The image format is tif.

[0017] S33, the information management system reads the digital image and generates 16-bit grayscale data for each pixel, that is, the grayscale value of each pixel.

[0018] In the above steps, the R-PCE software processes the digital image, directly reads the image, and generates 16-bit grayscale data for each pixel, that is, the grayscale value of each pixel (the grayscale value is generated by directly reading the digital image, 16-bit data, and the size range is 0-65535).

[0019] 4. Threshold comparison S4, the information management system counts the number of pixels whose grayscale values ​​are greater than the grayscale threshold in the pixel points of the small-diameter tube DR image, and compares the number of pixels with the pixel number threshold. When the number of pixels is greater than the pixel number threshold, enter step S5 to perform grating closure fine-tuning, otherwise the grating is at a suitable point and no adjustment is performed; Preferably, in step S4, the grayscale threshold is 50,000, and the pixel quantity threshold is 70.

[0020] In the present invention, the image is a single-channel 16-bit grayscale image. The built-in algorithm of the R-PCE software counts the grayscale value of each pixel according to the image data, and sets two thresholds, a grayscale threshold and a pixel number threshold. The grayscale threshold used in this system is 50,000, and the pixel number threshold is 70. When the R-PCE software recognizes that the number of pixels with grayscale values ​​greater than 50,000 is greater than 70, the R-PCE software communicates with the PLC, and the PLC starts the grating closure by controlling the motor through the I / O. During the grating closure process, the R-PCE software dynamically calculates the number of pixels with grayscale values ​​greater than 50,000. As the grating closes, the number of pixels with grayscale values ​​greater than 50,000 will gradually decrease.

[0021] In the present invention, when the grayscale value of a pixel is greater than the grayscale threshold (50000), it indicates that the X-ray dose received by the pixel is too large, that is, the pixel is overexposed.

[0022] When the number of pixels with grayscale values ​​greater than the grayscale threshold (50000) is greater than the pixel number threshold (70), it indicates that more pixels are overexposed. Under normal X-ray dose conditions, this condition generally indicates that the grating is opened too much and needs to be closed.

[0023] 5. Grating closure fine-tuning S5. The information management system sends a grating fine-tuning instruction to the controller, and the controller controls the grating opening and closing motor according to the grating fine-tuning instruction to fine-tune the grating.

[0024] Preferably, step S5 comprises the following steps: S51, after the grating reaches the preset point, the controller communicates with the information management system through TCP, and the controller sends a start fine-tuning signal to the information management system; S52, after receiving the fine-tuning signal, the information management system returns a successful reception signal to the controller, and the controller starts to control the grating opening and closing motor to rotate slowly to perform grating closing fine-tuning, and the information management system continuously repeats steps S2-S5 in real time; S53. When the number of pixels whose grayscale values ​​are greater than the grayscale threshold in step S4 is less than or equal to the pixel number threshold, the information management system sends an end adjustment signal to the controller. After receiving the signal, the controller controls the grating opening and closing motor to stop rotating, and returns a successful reception signal to the information management system, indicating that the grating has reached the appropriate position.

[0025] In the above steps, when step S4 reaches the judgment condition, that is, the number of pixels with grayscale values ​​greater than 50,000 is less than or equal to the threshold value of 70, the information management system sends an end adjustment signal to the controller, and the controller stops the motor after receiving the signal and returns a successful reception signal to the information management system. At this time, the grating reaches the appropriate point.

[0026] Based on the above grating adjustment method, the present invention further provides a grating adjustment system, comprising: A grating for shielding light, the grating being located below the X-ray system and the small-diameter tube; A grating opening and closing motor connected to the grating and used to drive the grating to open and close; A controller connected to the grating opening and closing motor control; An image acquisition module located below the grating and used for acquiring DR images of small-diameter tubes; An information management system is respectively connected to the controller and the image acquisition module in communication. The information management system controls the action of the grating opening and closing motor through the controller, pre-adjusts and fine-tunes the grating point position so that the grating reaches the standard point position.

[0027] Preferably, the grating includes two filter plates that can be opened and closed, and the two filter plates that can be opened and closed are respectively mounted on two grating adjustment mechanisms, and the two grating adjustment mechanisms are both connected to the grating opening and closing motor drive.

[0028] Preferably, the grating adjustment mechanism includes a linear module and a grating slide rail which are parallel to each other, the grating opening and closing motor is drive-connected to the linear module, one end of the filter plate is mounted on the output slider of the linear module, and the other end is slidably mounted on the grating slide rail.

[0029] Preferably, the image acquisition module is a flat-panel detector, and the linear module and the grating slide rail are both assembled on the flat-panel detector.

[0030] Beneficial effects of the present invention: The grating adjustment method and system provided by the present invention, the information management system and the controller first adjust the grating to the preset grating position by controlling the action of the grating opening and closing motor; then control the action of the grating opening and closing motor to fine-tune the grating, and fine-tune the grating from the preset position to the standard position, so as to achieve a more accurate final grating position. The grating shields the small-diameter tube to avoid overexposure of the edge of the captured DR image due to large edge X-ray transmission.

[0031] The grating adjustment method and system provided by the present invention first adjust the grating to a preset grating point. For a tube of a certain diameter, the opening and closing of the grating is pre-adjusted to a relatively reasonable amount, thereby reducing the time for subsequent adjustment of the grating through dynamic image acquisition analysis and improving the adjustment efficiency.

[0032] The grating adjustment method and system provided by the present invention realize automatic adjustment of the grating opening and closing of tubes with different diameters to obtain a DR image with a normal transmission dose. The grating opening and closing is automatically adjusted with high and accurate adjustment efficiency, avoiding the problems of low efficiency and low adjustment accuracy in manual adjustment.

[0033] The grating adjustment method and system provided by the present invention can realize automatic adjustment of the opening and closing of the gratings of tubes with different diameters, avoid visual fatigue caused by long-term manual adjustment, and be beneficial to the occupational health of professionals. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the grating adjustment system of the present invention; Figure 2 The image is overexposed at the edges; Figure 3 It is a normal DR image; Figure 4 A perspective diagram of a grating adjustment system of the present invention; Figure 5 It is a schematic diagram of another viewing angle of the grating adjustment system of the present invention; Figure 6 The schematic diagram of the grating adjustment system of the present invention is shown in FIG. Figure 6 Inside the lower middle part of the shell is Figure 4 and Figure 5 Grating adjustment system in Reference numerals: 11. Grating; 12. Grating opening and closing motor; 13. Image acquisition module; 14. Linear module; 15. Grating slide rail. DETAILED DESCRIPTION

[0035] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings to fully understand the purpose, characteristics and effects of the present invention.

[0036] Example 1 A grating adjustment method, such as Figure 1 The method comprises the following steps: S1. When detecting a small-diameter pipe of a certain diameter, the information management system sends a pre-adjustment instruction of the grating closing amount of the pipe of the corresponding diameter to the controller. The controller controls the grating opening and closing motor according to the pre-adjustment instruction of the grating closing amount of the pipe, and adjusts the grating to the preset grating point; S2, after the grating is adjusted to the preset grating position, the image acquisition module acquires the DR image of the small-diameter tube; S3, the image acquisition module sends the acquired small-diameter tube DR image to the information management system, and the information management system processes the small-diameter tube DR image to obtain the gray value of each pixel in the small-diameter tube DR image; S4, the information management system counts the number of pixels whose grayscale values ​​are greater than the grayscale threshold in the pixel points of the small-diameter tube DR image, and compares the number of pixels with the pixel number threshold. When the number of pixels is greater than the pixel number threshold, enter step S5 to perform grating closure fine-tuning, otherwise the grating is at a suitable point and no adjustment is performed; S5. The information management system sends a grating fine-tuning instruction to the controller, and the controller controls the grating opening and closing motor according to the grating fine-tuning instruction to fine-tune the grating.

[0037] During the DR flaw detection of small-diameter tubes, it is necessary to adjust the grating opening and closing for tubes of different diameters to shield the light, so as to avoid overexposure of the edge of the DR image due to large X-ray transmission at the edge. Figure 2 The edge overexposed image shown. This embodiment uses the above grating adjustment method to achieve automatic adjustment of the grating opening and closing of tubes with different diameters to obtain a DR image with normal transmission dose, such as Figure 3 shown.

[0038] Example 2 This embodiment further describes step S1 based on embodiment 1.

[0039] In this embodiment, before the image acquisition module acquires the DR image of the small-diameter tube, the grating is placed in a fully open state at the origin. The grating is closed mainly to block useless X-rays, and the amount of closure is mainly determined by the tube diameter. Different small-diameter tube diameter specifications and corresponding grating closure amounts are recorded in the information management system. The grating closure amounts of small-diameter tubes with different tube diameter specifications recorded in this information management system are 2 cm larger than the corresponding standard grating closure amounts. This is to enable the grating to reach the standard point position from the preset point position through subsequent fine-tuning closure, so as to achieve a more accurate final grating point position. When detecting a small-diameter tube of a certain diameter, the information management system sends the grating closure amount of the tube diameter specification to the controller, and the controller controls the grating opening and closing motor to make the grating close by the corresponding amount, thereby achieving pre-adjustment of the grating point position.

[0040] In this embodiment, the information management system is specifically R-PCE software in a computer, and the controller is a programmable logic controller PLC. R-PCE software sets the grating closure information of pipes with different pipe diameters. For example, the pipe diameters are 38.1mm, 45mm, 51mm, 54mm, 57mm, and 60mm, and the corresponding grating closures are 5cm, 7.6cm, 10cm, 11.6cm, 13.3cm, and 15cm.

[0041] In this embodiment, before the DR image is taken, the R-PCE communicates with the PLC, and the R-PCE sends a pre-adjustment instruction to the PLC. The PLC controls the rotation of the grating opening and closing motor to control the grating closing according to the pre-adjustment instruction. In this way, for a pipe of a certain diameter, the opening and closing of the grating is pre-adjusted to a relatively reasonable amount, thereby reducing the time for subsequent adjustment of the grating through dynamic image acquisition analysis and improving the adjustment efficiency.

[0042] Example 3 This embodiment further describes step S2 based on embodiment 2.

[0043] In this embodiment, the image acquisition module is specifically a flat panel detector, which is installed under the grating and is used to receive X-rays and perform A / D conversion. The R-PCE software acquires the acquired DR image through the SDK call of the flat panel detector, wherein the flat panel detector and the computer are connected to the same local area network through a switch. The image acquisition module is controlled by the information management system.

[0044] Example 4 This embodiment further describes step S3 based on embodiment 3.

[0045] The S3 step includes the following steps: S31. The flat panel detector receives the X-ray signal transmitted through the weld, and performs photoelectric conversion and A / D conversion to generate a digital image.

[0046] S32 and R-PCE software communicate with the flat panel detector and obtain 16-bit single-channel digital images (DR images) by calling the SDK of the flat panel detector. The image format is tif.

[0047] S33, R-PCE software processes digital images, directly reads images, and generates 16-bit grayscale data for each pixel, that is, the grayscale value of each pixel (the grayscale value is generated by directly reading the digital image, 16-bit data, and the size range is 0-65535).

[0048] Example 5 This embodiment further describes step S4 based on embodiment 4.

[0049] In this embodiment, the image is a single-channel 16-bit grayscale image. The built-in algorithm of the R-PCE software counts the grayscale value of each pixel according to the image data, and sets two thresholds, a grayscale threshold and a pixel number threshold. The grayscale threshold used in this system is 50,000, and the pixel number threshold is 70. When the R-PCE software recognizes that the number of pixels with a grayscale value greater than 50,000 is greater than 70, the R-PCE software communicates with the PLC, and the PLC controls the motor through the I / O to start closing the grating. During the closing process of the grating, the R-PCE software dynamically calculates the number of pixels with a grayscale value greater than 50,000. As the grating closes, the number of pixels with a grayscale value greater than 50,000 will gradually decrease.

[0050] In this embodiment, when the grayscale value of a pixel is greater than the grayscale threshold (50000), it indicates that the X-ray dose received by the pixel is too large, that is, the pixel is overexposed.

[0051] When the number of pixels with grayscale values ​​greater than the grayscale threshold (50000) is greater than the pixel number threshold (70), it indicates that more pixels are overexposed. Under normal X-ray dose conditions, this condition generally indicates that the grating is opened too much and needs to be closed.

[0052] Example 6 This embodiment further describes step S5 based on embodiment 5.

[0053] The S5 step includes the following steps: S51, after the grating reaches the preset point, the controller communicates with the information management system through TCP, and the controller sends a start fine-tuning signal to the information management system; S52, after receiving the fine-tuning signal, the information management system returns a successful reception signal to the controller, and the controller starts to control the grating opening and closing motor to rotate slowly to perform grating closing fine-tuning, and the information management system continuously repeats steps S2-S5 in real time; S53, when the determination condition of step S4 is met, that is, the number of pixels with grayscale values ​​greater than 50000 is less than or equal to the threshold value 70, the information management system sends an end adjustment signal to the controller, and the controller stops the motor after receiving the signal, and returns a successful reception signal to the information management system. At this time, the grating reaches the appropriate point.

[0054] Example 7 A grating adjustment system, such as Figure 1 , 4 -6, including: A grating 11 for shielding light, wherein the grating 11 is located below the X-ray system and the small-diameter tube; A grating opening and closing motor 12 connected to the grating 11 and used for driving the grating 11 to open and close; A controller connected to the grating opening and closing motor 12; An image acquisition module 13 located below the grating 11 and used for acquiring DR images of small-diameter tubes; An information management system is respectively connected to the controller and the image acquisition module 13 in communication. The information management system controls the grating opening and closing motor 12 through the controller to pre-adjust and fine-tune the position of the grating 11 so that the grating 11 reaches the standard position.

[0055] like Figure 4 and 5 As shown, the grating 11 includes two filter plates that can be opened and closed, and the two filter plates that can be opened and closed are respectively mounted on two grating adjustment mechanisms, and the two grating adjustment mechanisms are both connected to the grating opening and closing motor 12. The grating opening and closing motor 12 drives the grating adjustment mechanism to move, driving the filter plates to open and close.

[0056] like Figure 4 and 5 As shown, the grating adjustment mechanism includes a linear module 14 and a grating slide rail 15 which are parallel to each other, the grating opening and closing motor 12 is connected to the linear module 14 by driving, one end of the filter plate is mounted on the output slider of the linear module 14, and the other end is slidably mounted on the grating slide rail 15. When adjusting the grating 11, the grating opening and closing motor 12 drives the linear module 14 to move, and the linear module 14 drives the filter plate to slide on the grating slide rail 15 to achieve the adjustment of the grating 11.

[0057] like Figure 4 and 5 As shown, the image acquisition module 13 is a flat panel detector, and the linear module 14 and the grating slide rail 15 are both assembled on the flat panel detector.

[0058] The above is a specific description of the implementation mode of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A grating adjustment method, characterized in that: The following steps are involved: S1. When detecting a small-diameter pipe of a certain diameter, the information management system sends a pre-adjustment instruction of the grating closing amount of the pipe of the corresponding diameter to the controller. The controller controls the grating opening and closing motor according to the pre-adjustment instruction of the grating closing amount of the pipe, and adjusts the grating to the preset grating point; S2, after the grating is adjusted to the preset grating position, the image acquisition module acquires the DR image of the small-diameter tube; S3, the image acquisition module sends the acquired small-diameter tube DR image to the information management system, and the information management system processes the small-diameter tube DR image to obtain the gray value of each pixel in the small-diameter tube DR image; S4, the information management system counts the number of pixels whose grayscale values ​​are greater than the grayscale threshold in the pixel points of the small-diameter tube DR image, and compares the number of pixels with the pixel number threshold. When the number of pixels is greater than the pixel number threshold, enter step S5 to perform grating closure fine-tuning, otherwise the grating is at a suitable point and no adjustment is performed; S5. The information management system sends a grating fine-tuning instruction to the controller, and the controller controls the grating opening and closing motor according to the grating fine-tuning instruction to fine-tune the grating.

2. The grating adjustment method according to claim 1, characterized in that: In step S1, before the preset position of the grating is adjusted, the grating is placed at the origin and is in a fully open state.

3. The grating adjustment method according to claim 1, characterized in that: In step S1, the tube grating closure amount is 2 cm larger than the corresponding standard grating closure amount.

4. The grating adjustment method according to claim 1, characterized in that: In step S1, the grating closure information of pipes with different specifications and diameters is set in the information management system.

5. The grating adjustment method according to claim 1, characterized in that: The S3 step includes the following steps: S31, the image acquisition module receives the X-ray signal transmitted through the weld, and performs photoelectric conversion and A / D conversion to generate a digital image; S32, the information management system obtains a 16-bit single-channel digital image by calling the SDK of the image acquisition module; S33, the information management system reads the digital image and generates 16-bit grayscale data for each pixel, that is, the grayscale value of each pixel.

6. The grating adjustment method according to claim 1, characterized in that: In step S4, the grayscale threshold is 50,000, and the pixel quantity threshold is 70.

7. The grating adjustment method according to claim 1, characterized in that: The S5 step includes the following steps: S51, after the grating reaches the preset point, the controller communicates with the information management system through TCP, and the controller sends a start fine-tuning signal to the information management system; S52, after receiving the fine-tuning signal, the information management system returns a successful reception signal to the controller, and the controller starts to control the grating opening and closing motor to rotate slowly to perform grating closing fine-tuning, and the information management system continuously repeats steps S2-S5 in real time; S53. When the number of pixels whose grayscale values ​​are greater than the grayscale threshold in step S4 is less than or equal to the pixel number threshold, the information management system sends an end adjustment signal to the controller. After receiving the signal, the controller controls the grating opening and closing motor to stop rotating, and returns a successful reception signal to the information management system, indicating that the grating has reached the appropriate position.

8. A grating adjustment system based on the grating adjustment method according to any one of claims 1 to 7, characterized in that: include: A grating for shielding light, the grating being located below the X-ray system and the small-diameter tube; A grating opening and closing motor connected to the grating and used to drive the grating to open and close; A controller connected to the grating opening and closing motor control; An image acquisition module located below the grating and used for acquiring DR images of small-diameter tubes; An information management system is respectively connected to the controller and the image acquisition module in communication. The information management system controls the action of the grating opening and closing motor through the controller, pre-adjusts and fine-tunes the grating point position so that the grating reaches the standard point position.

9. The grating adjustment system according to claim 8, characterized in that: The grating comprises two filter plates that can be opened and closed. The two filter plates that can be opened and closed are respectively mounted on two grating adjustment mechanisms. The two grating adjustment mechanisms are both connected to the grating opening and closing motor drive.

10. The grating adjustment system according to claim 9, characterized in that: The grating adjustment mechanism includes a linear module and a grating slide rail which are parallel to each other. The grating opening and closing motor is drivingly connected to the linear module. One end of the filter plate is mounted on the output slider of the linear module, and the other end is slidably mounted on the grating slide rail.

Images