Image quality indicator placing system and method

Abstract

The invention discloses an image quality indicator placing system and method, and relates to the technical field of automatic nondestructive testing. The controller is in communication connection with the information management system; the image quality indicator placing device is in communication connection with the controller and comprises a double-wire image quality indicator for assisting in measuring the DR image resolution of the small-diameter tube and a plurality of single-wire image quality indicators of different specifications for assisting in measuring the DR image sensitivity of the small-diameter tube; and the double-wire placing mechanism and the single-wire placing mechanism are used for respectively driving the double-wire image quality indicator and the single-wire image quality indicator to move between the small-diameter tube and the X-ray system for placing. The image quality indicator is automatically placed, and the image quality indicator placing efficiency is improved. The double-wire image quality indicator assists in measuring the DR image resolution of the small-diameter tube, and the single-wire image quality indicator assists in measuring the DR image sensitivity of the small-diameter tube so as to confirm the quality of the acquired image.

Description

Technical Field

[0001] The present invention relates to the technical field of automated nondestructive testing, and more particularly to an image quality meter placement system and method in fully automated small-diameter pipe DR testing. 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 existing technology, when X-ray imaging defects are detected in the serpentine and straight pipe welds of boiler high-temperature components, a DR imaging detection system (referred to as industrial television RTV in the industry) is required. Currently, all RTV systems in the industry are semi-automatic systems. When performing weld flaw detection, the RTV system needs to confirm the quality of the collected images, such as sensitivity and resolution, which requires the use of an image quality meter to measure the image quality.

[0005] In the prior art, the image quality meter is placed manually in the lead room by a human being, which is extremely inefficient. In addition, the X-rays in the lead room will irradiate the workers, increasing the risk of their occupational health. Summary of the invention

[0006] In order to overcome the defects in the above-mentioned prior art, the present invention discloses an image quality meter placement system and method. The purpose of the present invention is to solve the problem that the manual placement of the image quality meter in the prior art is extremely inefficient and the occupational health risk of X-ray radiation workers is increased. The present invention automatically controls the placement of the image quality meter by setting an information management system, a controller and an image quality meter placement device, thereby improving the efficiency of the image quality meter placement, while avoiding frequent manual entry into the lead room to manually place the image quality meter, avoiding workers from being exposed to X-ray radiation in the lead room, and reducing the risk of occupational health of workers.

[0007] In order to achieve the above objectives, the technical solution adopted by the present invention is: An image quality meter placement system, comprising: Information management system; a controller in communication with the information management system; An image quality meter placement device is communicatively connected to the controller, the image quality meter placement device includes a double-wire image quality meter for assisting in measuring the resolution of a small-diameter tube DR image and a plurality of single-wire image quality meters of different specifications for assisting in measuring the sensitivity of a small-diameter tube DR image, and a double-wire placement mechanism and a single-wire placement mechanism for respectively driving the double-wire image quality meter and the single-wire image quality meter to move between the small-diameter tube and the X-ray system for placement, an image acquisition device is arranged below the small-diameter tube, and the image acquisition device is communicatively connected to the information management system.

[0008] Preferably, the double-wire placing mechanism comprises a double-wire vertical moving structure, a double-wire horizontal moving structure and a double-wire fixing plate; The double-wire vertical moving structure is fixed on a fixing seat, the double-wire horizontal moving structure is mounted on the output end of the double-wire vertical moving structure, the double-wire fixing plate is mounted on the output end of the double-wire horizontal moving structure, and the double-wire image quality meter is mounted on the double-wire fixing plate; When the dual-wire image quality meter is placed, the dual-wire vertical moving structure and the dual-wire lateral moving structure drive the dual-wire image quality meter to move vertically and horizontally to the top of the small-diameter tube to assist in measuring the resolution of the small-diameter tube DR image.

[0009] Preferably, the double-wire vertical moving structure and the double-wire horizontal moving structure are both linear modules.

[0010] Preferably, the monofilament placing mechanism comprises a monofilament vertical moving structure, a monofilament horizontal moving structure, a monofilament fixing plate, a rotating structure and a turntable structure; The single-wire vertical moving structure is fixed on a fixing seat, the single-wire transverse moving structure is mounted on the output end of the single-wire vertical moving structure, the single-wire fixing plate is mounted on the output end of the single-wire transverse moving structure, the rotating structure is mounted on the single-wire fixing plate, the turntable structure is mounted on the output end of the rotating structure, and the single-wire image quality meters of different specifications are mounted on the turntable structure; When the single-wire image quality meter is placed, the single-wire vertical moving structure, the single-wire lateral moving structure and the rotating structure drive the turntable structure to move vertically, horizontally and rotate, and the turntable structure is moved above the small-diameter tube. The turntable structure drives the single-wire image quality meters of different specifications to rotate, and the single-wire image quality meters of corresponding specifications are selected and placed above the small-diameter tube to assist in measuring the DR image sensitivity of the small-diameter tube.

[0011] Preferably, the rotating structure comprises a first rotating motor and a rotating plate, the first rotating motor is mounted on the monofilament fixing plate, and the rotating plate is mounted on an output end of the first rotating motor.

[0012] Preferably, the turntable structure includes a second rotating motor and a monofilament turntable, the second rotating motor is mounted on the rotating plate, the monofilament turntable is mounted on the output end of the second rotating motor, and the monofilament image quality meters of different specifications are evenly arranged on the monofilament turntable in a circular shape.

[0013] Preferably, the single-filament vertical moving structure and the single-filament horizontal moving structure are both linear modules.

[0014] Based on the above-mentioned image quality meter placement system, the present invention also provides an image quality meter placement method, comprising the following steps: S1. During the DR inspection of small-diameter pipe welds, when the first transillumination of welds with different wall thicknesses occurs, the information management system determines that an image quality meter needs to be placed to measure the DR image quality; S2, the information management system sends an image quality meter placement signal to the controller, including a dual-wire image quality meter placement signal and / or a single-wire image quality meter placement signal; S3. The controller controls the double-wire placement mechanism and / or the single-wire placement mechanism to move according to the received image quality meter placement signal, and drives the double-wire image quality meter and / or the single-wire image quality meter to move between the small-diameter tube and the X-ray system for placement.

[0015] Preferably, step S3 includes: the controller receives a dual-wire image quality meter placement signal, controls the movement of the dual-wire vertical moving structure and the dual-wire lateral moving structure, drives the dual-wire image quality meter to move vertically and laterally, and moves it above the small-diameter tube to assist in measuring the DR image resolution of the small-diameter tube.

[0016] Preferably, step S3 includes: the controller receives a single-wire image quality meter placement signal corresponding to a single-wire image quality meter of a certain specification, controls the movement of the single-wire vertical moving structure, the single-wire lateral moving structure and the rotating structure, drives the turntable structure to move vertically, laterally and rotate, and moves the turntable structure to above the small-diameter tube; the controller controls the turntable structure to drive the single-wire image quality meters of several different specifications to rotate, drives the single-wire image quality meter corresponding to the single-wire image quality meter placement signal on the single-wire turntable to be placed above the small-diameter tube, and performs auxiliary measurement of the DR image sensitivity of the small-diameter tube.

[0017] Beneficial effects of the present invention: The image quality meter placement system and method provided by the present invention are provided with an information management system, a controller and an image quality meter placement device. The information management system and the controller control the image quality meter placement device to automatically place the image quality meter, thereby improving the image quality meter placement efficiency. The image quality meter includes a double-wire image quality meter and a single-wire image quality meter. The double-wire image quality meter assists in measuring the resolution of the DR image of a small-diameter tube, and the single-wire image quality meter assists in measuring the sensitivity of the DR image of a small-diameter tube, so as to confirm the quality of the image collected in the fully automated DR detection of small-diameter tubes, and facilitate the subsequent defect evaluation of the DR image. The single-wire image quality meter has several different specifications to confirm the image quality corresponding to the different diameters and wall thicknesses of the small-diameter tube.

[0018] The image quality meter placement system and method provided by the present invention avoids frequent manual entry into the lead room to manually place the image quality meter, effectively avoids workers from being exposed to X-ray radiation in the lead room while improving detection efficiency, and reduces the risk of occupational health of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an image quality meter placement system of the present invention; Figure 2 A schematic diagram of a display device for displaying an image quality meter according to the present invention from one viewing angle; Figure 3 A schematic diagram of the image quality meter placement device of the present invention from another viewing angle; Figure 4 It is a schematic diagram of the image quality meter placement device, the X-ray system, and the image acquisition device of the present invention; Reference numerals: 11. Double-wire image quality meter; 12. Single-wire image quality meter; 13. Double-wire placing mechanism; 131. Double-wire vertical moving structure; 132. Double-wire lateral moving structure; 133. Double-wire fixing plate; 14. Single-wire placing mechanism; 141. Single-wire vertical moving structure; 142. Single-wire lateral moving structure; 143. Single-wire fixing plate; 144. First rotating motor; 145. Rotating plate; 146. Second rotating motor; 147. Single-wire turntable; 15. Fixed seat. DETAILED DESCRIPTION

[0020] 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.

[0021] Example 1 An image quality meter placement system, such as Figure 1-4 As shown, including: Information management system; a controller in communication with the information management system; An image quality meter placement device is communicatively connected to the controller, the image quality meter placement device includes a double-wire image quality meter 11 for assisting in measuring the resolution of small-diameter tube DR images and a plurality of single-wire image quality meters 12 of different specifications for assisting in measuring the sensitivity of small-diameter tube DR images, and a double-wire placement mechanism 13 and a single-wire placement mechanism 14 for respectively driving the double-wire image quality meter 11 and the single-wire image quality meter 12 to move between the small-diameter tube and the X-ray system for placement. An image acquisition device is arranged below the small-diameter tube, and the image acquisition device is communicatively connected to the information management system.

[0022] In this embodiment, the information management system is specifically the R-PCE software in the computer, and the controller is a programmable logic controller PLC, so the entire image quality meter placement system is composed of R-PCE software, PLC, and image quality meter placement device. When image quality measurement is required, the R-PCE software communicates with the PLC and sends an image quality meter placement signal. The PLC controls the operation of the image quality meter placement device through I / O output according to the different signals received. Specifically, the double-wire placement mechanism 13 drives the double-wire image quality meter 11 to move between the small-diameter tube and the X-ray system for placement; the single-wire placement mechanism 14 drives the single-wire image quality meter 12 to move between the small-diameter tube and the X-ray system for placement. After the image quality meter is placed in place, the X-ray system runs, the image acquisition device obtains the DR image with the wire diameter and sends it to the information management system, and the information management system then confirms the quality of the acquired image, such as sensitivity and resolution, based on the DR image with the wire diameter.

[0023] In this embodiment, the image quality meter placement device is controlled by the information management system and the controller to automatically place the image quality meter, thereby improving the efficiency of image quality meter placement. The image quality meter includes a double-wire image quality meter 11 and a single-wire image quality meter 12. The double-wire image quality meter 11 assists in measuring the resolution of the DR image of the small-diameter tube, and the single-wire image quality meter 12 assists in measuring the sensitivity of the DR image of the small-diameter tube, so as to confirm the quality of the image collected in the fully automated DR detection of the small-diameter tube, and facilitate the subsequent defect evaluation of the DR image. The single-wire image quality meter 12 has several different specifications to confirm the image quality corresponding to the different wall thicknesses of the small-diameter tube. At the same time, it avoids frequent manual entry into the lead room to manually place the image quality meter, avoids the staff from being exposed to X-ray radiation in the lead room, and reduces the risk of occupational health of the staff.

[0024] Example 2 This embodiment is further described on the basis of embodiment 1. Figure 2 and Figure 3 As shown, the double-wire placing mechanism 13 includes a double-wire vertical moving structure 131, a double-wire horizontal moving structure 132 and a double-wire fixing plate 133; The double-wire vertical moving structure 131 is fixed on the fixing seat 15, the double-wire lateral moving structure 132 is mounted on the output end of the double-wire vertical moving structure 131, the double-wire fixing plate 133 is mounted on the output end of the double-wire lateral moving structure 132, and the double-wire image quality meter 11 is mounted on the double-wire fixing plate 133; When the dual-wire image quality meter 11 is placed, the dual-wire vertical moving structure 131 and the dual-wire horizontal moving structure 132 drive the dual-wire image quality meter 11 to move vertically and horizontally to the top of the small-diameter tube to assist in measuring the resolution of the small-diameter tube DR image.

[0025] In this embodiment, the above-mentioned double-wire vertical moving structure 131 and double-wire horizontal moving structure 132 can both be linear modules. For the placement of the double-wire image quality meter 11, the R-PCE software sends a signal to the PLC, and the PLC controls the movement of the double-wire vertical moving structure 131 and the double-wire horizontal moving structure 132, thereby driving the double-wire fixing plate 133 to move up and down and left and right. The double-wire image quality meter 11 is fixed on the double-wire fixing plate 133, and drives the double-wire image quality meter 11 to move to a distance less than 3mm from the small-diameter tube and stop, that is, the placement of the double-wire image quality meter 11 is completed.

[0026] Example 3 This embodiment is further described on the basis of embodiment 2. Figure 2 and Figure 3 As shown, the monofilament placing mechanism 14 includes a monofilament vertical moving structure 141, a monofilament horizontal moving structure 142, a monofilament fixing plate 143, a rotating structure and a turntable structure; The monofilament vertical moving structure 141 is fixed on the fixing seat 15, the monofilament transverse moving structure 142 is mounted on the output end of the monofilament vertical moving structure 141, the monofilament fixing plate 143 is mounted on the output end of the monofilament transverse moving structure 142, the rotating structure is mounted on the monofilament fixing plate 143, the turntable structure is mounted on the output end of the rotating structure, and the monofilament image quality meters 12 of different specifications are mounted on the turntable structure; When the single-wire image quality meter 12 is placed, the single-wire vertical moving structure 141, the single-wire lateral moving structure 142 and the rotating structure drive the turntable structure to move vertically, horizontally and rotate, and move the turntable structure to above the small-diameter tube. The turntable structure drives the single-wire image quality meters 12 of several different specifications to rotate, and the single-wire image quality meters 12 of corresponding specifications are selected and placed above the small-diameter tube to assist in measuring the DR image sensitivity of the small-diameter tube.

[0027] like Figure 2 and Figure 3As shown, the rotating structure includes a first rotating motor 144 and a rotating plate 145 . The first rotating motor 144 is mounted on the monofilament fixing plate 143 , and the rotating plate 145 is mounted on the output end of the first rotating motor 144 .

[0028] like Figure 2 and Figure 3 As shown, the turntable structure includes a second rotating motor 146 and a single-wire turntable 147. The second rotating motor 146 is mounted on the rotating plate 145. The single-wire turntable 147 is mounted on the output end of the second rotating motor 146. The single-wire image quality meters 12 of different specifications are evenly arranged on the single-wire turntable 147 in a circular shape.

[0029] In this embodiment, the above-mentioned single-wire vertical moving structure 141 and single-wire horizontal moving structure 142 can both be linear modules. For the placement of the single-wire image quality meter 12, the R-PCE software sends a signal to the PLC, and the PLC controls the movement of the single-wire vertical moving structure 141 and the single-wire horizontal moving structure 142 to control the rotation structure to move up, down, left, and right. When it moves to a distance less than 3mm from the small-diameter tube, it stops. At this time, the first rotating motor 144 drives the turntable structure to rotate counterclockwise, so that the single-wire turntable 147 reaches a suitable position and stops. At this time, the second rotating motor 146 drives the single-wire turntable 147 to rotate and select a single-wire image quality meter 12 of suitable specifications to be placed above the small-diameter tube, that is, the automatic placement of the single-wire image quality meter 12 is completed. In this embodiment, 4 types of single-wire image quality meters 12 are fixed on the single-wire turntable 147, and different specifications of single-wire image quality meters 12 need to be selected according to the different diameters and wall thicknesses of the small-diameter tubes.

[0030] In this embodiment, the working principle of placing the image quality meter in the image quality meter placing device is: when performing single-wire measurement or double-wire measurement, it is necessary to place a single-wire image quality meter 12 or a double-wire image quality meter 11 above the small-diameter tube, and then perform imaging to obtain a DR image with a wire diameter. For the placement of the double-wire image quality meter 11, the R-PCE software sends a signal to the PLC, and the PLC directly controls the double-wire image quality meter 11 to move up and down and left and right for placement by controlling the double-wire vertical moving structure 131 and the double-wire horizontal moving structure 132. For the single-wire image quality meter 12, since there are 4 specifications, the R-PCE software needs to send different signals to the PLC according to the diameter and wall thickness of the small-diameter tube. The PLC controls the mechanical structure to rise and fall so that the single-wire image quality meter 12 reaches a suitable height, and then drives the turntable structure to rotate to select and place the single-wire image quality meter 12.

[0031] In this embodiment, during the DR flaw detection process of small-diameter pipes, it is necessary to measure the quality of the DR images taken, mainly including sensitivity and resolution, which requires the placement of a single-wire image quality meter 12 and a double-wire image quality meter 11. Among them, 4 types of single-wire image quality meters 12 are placed on the single-wire turntable 147, and one specification of double-wire image quality meter 11 is placed on the double-wire fixing plate.

[0032] In this embodiment, the image quality meter is provided with a single wire and a double wire because the single wire image quality meter 12 is used to measure image sensitivity, and the double wire image quality meter 11 is used to measure image resolution. For small diameter pipes, each welded joint needs to be verified for DR image sensitivity during the first transillumination; each welded joint needs to be verified for DR image resolution during the first transillumination.

[0033] In this embodiment, the single-wire turntable 147 fixes 4 types of single-wire image quality meters 12, which are less than 2 mm thick and have no image residue after transillumination. Each type of single-wire image quality meter 12 corresponds to the DR image sensitivity measurement requirements of small-diameter pipe welds with different wall thicknesses. At present, there are four types of small-diameter pipes with four wall thicknesses according to actual needs, so 4 types of single-wire image quality meters 12 need to be placed.

[0034] Example 4 A method for placing an image quality meter comprises the following steps: S1. During the DR inspection of small-diameter pipe welds, when the first transillumination of welds with different wall thicknesses occurs, the information management system determines that an image quality meter needs to be placed to measure the DR image quality; S2, the information management system sends an image quality meter placement signal to the controller, including a dual-wire image quality meter 11 placement signal and / or a single-wire image quality meter 12 placement signal; In the above steps, the information management system R-PCE sends 5 different signals to the PLC through TCP communication, which are double-wire image quality meter placement signals and 4 specifications of single-wire image quality meter placement signals.

[0035] S3. The controller controls the double-wire placement mechanism 13 and / or the single-wire placement mechanism 14 to move according to the received image quality meter placement signal, and drives the double-wire image quality meter 11 and / or the single-wire image quality meter 12 to move between the small-diameter tube and the X-ray system for placement.

[0036] In the above steps, the PLC runs the corresponding built-in program according to the different signals received, controls the rotation of the corresponding variable frequency motor through I / O output, and then controls the image quality meter to reach the appropriate position to complete the placement.

[0037] Step S3 includes: the controller receives the placement signal of the dual-wire image quality meter 11, controls the movement of the dual-wire vertical moving structure 131 and the dual-wire lateral moving structure 132, drives the dual-wire image quality meter 11 to move vertically and horizontally, and moves it to the top of the small-diameter tube to assist in measuring the DR image resolution of the small-diameter tube.

[0038] Step S3 includes: the controller receives a single-wire image quality meter 12 placement signal corresponding to a single-wire image quality meter 12 of a certain specification, controls the single-wire vertical moving structure 141, the single-wire lateral moving structure 142 and the rotating structure to move, drives the turntable structure to move vertically, horizontally and rotate, and moves the turntable structure to above the small-diameter tube; the controller controls the turntable structure to drive the single-wire image quality meters 12 of several different specifications to rotate, drives the single-wire image quality meter 12 corresponding to the single-wire image quality meter 12 placement signal on the single-wire turntable 147 to be placed above the small-diameter tube, and performs auxiliary measurement of the DR image sensitivity of the small-diameter tube.

[0039] 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. An image quality meter placement system, characterized in that: include: Information management system; a controller in communication with the information management system; An image quality meter placement device is communicatively connected to the controller, the image quality meter placement device comprising a double-wire image quality meter (11) for assisting in measuring the resolution of a small-diameter tube DR image and a plurality of single-wire image quality meters (12) of different specifications for assisting in measuring the sensitivity of a small-diameter tube DR image, and a double-wire placement mechanism (13) and a single-wire placement mechanism (14) for respectively driving the double-wire image quality meter (11) and the single-wire image quality meter (12) to move between the small-diameter tube and the X-ray system for placement, an image acquisition device is disposed below the small-diameter tube, and the image acquisition device is communicatively connected to the information management system.

2. The image quality meter placement system according to claim 1, characterized in that: The double-wire placing mechanism (13) comprises a double-wire vertical moving structure (131), a double-wire horizontal moving structure (132) and a double-wire fixing plate (133); The double-wire vertical moving structure (131) is fixed on a fixing seat (15), the double-wire lateral moving structure (132) is mounted on an output end of the double-wire vertical moving structure (131), the double-wire fixing plate (133) is mounted on an output end of the double-wire lateral moving structure (132), and the double-wire image quality meter (11) is mounted on the double-wire fixing plate (133); When the dual-wire image quality meter (11) is placed, the dual-wire vertical moving structure (131) and the dual-wire horizontal moving structure (132) drive the dual-wire image quality meter (11) to move vertically and horizontally to the top of the small-diameter tube to assist in measuring the resolution of the small-diameter tube DR image.

3. The image quality meter placement system according to claim 1, characterized in that: The monofilament placing mechanism (14) comprises a monofilament vertical moving structure (141), a monofilament horizontal moving structure (142), a monofilament fixing plate (143), a rotating structure and a rotating disk structure; The single-filament vertical moving structure (141) is fixed on a fixing seat (15), the single-filament transverse moving structure (142) is mounted on an output end of the single-filament vertical moving structure (141), the single-filament fixing plate (143) is mounted on an output end of the single-filament transverse moving structure (142), the rotating structure is mounted on the single-filament fixing plate (143), the turntable structure is mounted on an output end of the rotating structure, and the single-filament image quality meters (12) of different specifications are mounted on the turntable structure; When the single-filament image quality meter (12) is placed, the single-filament vertical moving structure (141), the single-filament horizontal moving structure (142) and the rotating structure drive the turntable structure to move vertically, horizontally and rotate, and the turntable structure is moved to above the small-diameter tube. The turntable structure drives the single-filament image quality meters (12) of different specifications to rotate, and the single-filament image quality meters (12) of corresponding specifications are selected and placed above the small-diameter tube to assist in measuring the DR image sensitivity of the small-diameter tube.

4. The image quality meter placement system according to claim 3, characterized in that: The rotating structure comprises a first rotating motor (144) and a rotating plate (145); the first rotating motor (144) is mounted on the monofilament fixing plate (143); and the rotating plate (145) is mounted on the output end of the first rotating motor (144).

5. The image quality meter placement system according to claim 4, characterized in that: The turntable structure comprises a second rotating motor (146) and a monofilament turntable (147), wherein the second rotating motor (146) is mounted on the rotating plate (145), and the monofilament turntable (147) is mounted on the output end of the second rotating motor (146). The plurality of monofilament image quality meters (12) of different specifications are evenly arranged in a circumferential manner on the monofilament turntable (147).

6. The image quality meter placement system according to claim 2, characterized in that: The double-wire vertical moving structure (131) and the double-wire horizontal moving structure (132) are both linear modules.

7. The image quality meter placement system according to claim 3, characterized in that: The single-filament vertical moving structure (141) and the single-filament horizontal moving structure (142) are both linear modules.

8. An image quality meter placement method based on the image quality meter placement system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. During the DR inspection of small-diameter pipe welds, when the first transillumination of welds with different wall thicknesses occurs, the information management system determines that an image quality meter needs to be placed to measure the DR image quality; S2, the information management system sends an image quality meter placement signal to the controller, including a dual-wire image quality meter (11) placement signal and / or a single-wire image quality meter (12) placement signal; S3. The controller controls the double-wire placement mechanism (13) and / or the single-wire placement mechanism (14) to move according to the received image quality meter placement signal, and drives the double-wire image quality meter (11) and / or the single-wire image quality meter (12) to move to between the small-diameter tube and the X-ray system for placement.

9. The method for placing an image quality meter according to claim 8, wherein: Step S3 includes: the controller receives a signal for placing the dual-wire image quality meter (11), controls the movement of the dual-wire vertical moving structure (131) and the dual-wire horizontal moving structure (132), drives the dual-wire image quality meter (11) to move vertically and horizontally, and moves it to the top of the small-diameter tube to assist in measuring the resolution of the DR image of the small-diameter tube.

10. The method for placing an image quality meter according to claim 8, wherein: Step S3 includes: the controller receives a single-filament image quality meter (12) placement signal corresponding to a single-filament image quality meter (12) of a certain specification, controls the single-filament vertical moving structure (141), the single-filament horizontal moving structure (142) and the rotating structure to move, drives the turntable structure to move vertically, horizontally and rotate, and moves the turntable structure to above the small-diameter tube; the controller controls the turntable structure to drive the single-filament image quality meters (12) of different specifications to rotate, drives the single-filament image quality meter (12) corresponding to the single-filament image quality meter (12) placement signal on the single-filament turntable (147) to be placed above the small-diameter tube, and performs auxiliary measurement of the DR image sensitivity of the small-diameter tube.

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