Turbine blade full-coverage image acquisition method and device based on cooperative sliding rotation of multiple rows of industrial cameras

Abstract

The invention discloses a steam turbine blade full-coverage image acquisition method and device based on cooperative sliding rotation of multiple rows of industrial cameras, and belongs to the technical field of steam turbine blade detection. In order to solve the problems that manual detection is low in efficiency and poor in safety and the blade state cannot be monitored in real time, a stretching-in type sealing device is adopted to be welded to the interior of a steam turbine, a visual window is arranged, and multiple sets of industrial camera arrays are arranged in the device and fixed to a rotating shaft capable of horizontally sliding and rotating; determining a shooting area when the blade is static by pre-adjusting the focal length and angle of the camera; during operation, the surrounding type high-intensity light source and the air knife cleaning module are started to remove window water mist, and the multi-camera frame rate and the shutter speed are synchronously adjusted to collect blade images. Non-contact real-time high-definition image acquisition is realized, potential safety hazards are eliminated, crack identification precision is improved, and data support is provided for blade state analysis.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of steam turbine blade detection, and particularly relates to a steam turbine blade full-coverage image acquisition method and device based on coordinated sliding rotation of multiple industrial cameras. BACKGROUND

[0002] As a core power equipment, the steam turbine blade is prone to cracks, dents and other damages in the extreme environment of high temperature, high pressure, high speed rotation and wet steam corrosion, which directly threatens the safety of the unit. The traditional detection relies on manual disassembly and inspection, which has the following defects: the detection needs to be stopped and disassembled, which is inefficient and cannot be monitored in real time; the operation personnel's experience has an impact, and small damages are prone to be missed; internal defects are difficult to find; the labor intensity of maintenance is high, and the cost is high. With the development of technology, automatic image acquisition devices have been applied in the field of fans, such as the sample image acquisition device for fan blades in the utility model patent "A sample image acquisition device for fan blades" (application number CN202420474390.5), the real-time monitoring device for wind turbine blade state in the invention patent "A real-time monitoring device for wind turbine blade state" (application number CN202310828200.5), and the crack image acquisition device for wind turbine blade in the utility model patent "A crack image acquisition device for wind turbine blade" (application number CN201922267105.4). However, the internal environment of the steam turbine is more severe - the blades are closely arranged, the rotating speed is extremely high (more than 3000r / min), and the blades are subjected to steam impact and centrifugal force, which makes the fan field scheme inapplicable: first, the existing device cannot work stably in a closed high temperature and high pressure space; second, the high-speed rotating blades cause image blur, and there is a lack of adaptive high-speed shooting means; third, the steam condensation water mist seriously interferes with the light transmittance of the viewing window, and the existing technology does not solve the problem of real-time cleaning. Therefore, it is urgent to develop a non-contact real-time image acquisition method for the special working conditions of the steam turbine to overcome environmental interference under the condition of not stopping the machine and realize high-definition monitoring and damage identification of the blade state. SUMMARY

[0003] To solve the above technical problems, the present application provides a steam turbine blade full-coverage image acquisition method and device based on coordinated sliding rotation of multiple industrial cameras to solve the problems existing in the prior art.

[0004] In the first aspect, to achieve the above-mentioned purpose, the present application provides a steam turbine blade full-coverage image acquisition method based on coordinated sliding rotation of multiple industrial cameras, which comprises the following steps:

[0005] A steel pipe extending into the steam turbine is welded to a position close to the end blade, and visual viewing windows are arranged on both sides of the blade;

[0006] The multiple industrial cameras are arranged in the form of an array group in the extending closed device and are fixed on a rotating shaft which can slide horizontally and rotate;

[0007] A high-intensity light source is arranged around the visual window, a hydrophobic film is pasted on the surface of the visual window, and a wind knife cleaning module is installed;

[0008] The focal length, angle and shooting area of the camera array are pre-adjusted when the steam turbine is not rotating;

[0009] The camera and the light source are started when the steam turbine is in a working state, the frame rate and the shutter speed are adjusted to collect the blade image, and the wind knife cleaning window is used.

[0010] Optionally, the extending closed device comprises a closed steel pipe, the camera array group is fixed in the steel pipe, and visual windows are arranged at both ends of the steel pipe.

[0011] Optionally, the adjustment process of the camera array group comprises: adjusting the horizontal position and the shooting angle of the camera array through the rotating shaft, so that different cameras cover different areas of the blade.

[0012] Optionally, the wind knife cleaning module comprises an aluminum alloy wind knife nozzle, the nozzle is arranged along the edge of the window, and the water mist is removed by jetting air flow.

[0013] Optionally, the pre-adjustment process comprises: testing the shooting effect of different camera groups in the static state of the steam turbine, and adjusting the focal length and the light source irradiation angle.

[0014] Optionally, the process of collecting the blade image comprises: synchronously adjusting the frame rate and the shutter speed of the multiple camera array groups when the steam turbine is running, to ensure that the image is clear and continuous.

[0015] In a second aspect, the application further provides a steam turbine blade full-coverage image acquisition device with multiple industrial camera arrays cooperating with sliding and rotating, which is used to implement a steam turbine blade full-coverage image acquisition method with multiple industrial camera arrays cooperating with sliding and rotating.

[0016] The extending closed device is welded to the inside of the steam turbine and is provided with a visual window;

[0017] The multi-directional adjustment and shooting device comprises a rotating shaft which can slide horizontally and rotate, and multiple industrial camera array groups fixed on the rotating shaft;

[0018] The window cleaning device is arranged at the edge of the visual window and comprises a wind knife nozzle and a hydrophobic film;

[0019] The dynamic light source device is arranged around the visual window and is used to irradiate the blade shooting area;

[0020] A control adjustment device is used to pre-adjust camera parameters and synchronously control the camera array, light source and cleaning device during operation of the steam turbine.

[0021] In a third aspect, the present application further provides a computer terminal device, comprising:

[0022] one or more processors;

[0023] a memory coupled to the processors, storing one or more programs;

[0024] When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the full-coverage image acquisition method of the steam turbine blade through the coordinated sliding rotation of the multi-column industrial camera array.

[0025] In a fourth aspect, the present application further provides a computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the full-coverage image acquisition method of the steam turbine blade through the coordinated sliding rotation of the multi-column industrial camera array.

[0026] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, and the computer program is executed by a processor to implement the steps of the full-coverage image acquisition method of the steam turbine blade through the coordinated sliding rotation of the multi-column industrial camera array.

[0027] Compared with the prior art, the present application has the following advantages and technical effects:

[0028] The full-coverage image acquisition method of the steam turbine blade through the coordinated sliding rotation of the multi-column industrial camera array provided by the present application realizes non-contact real-time image acquisition of the end blade of the steam turbine, avoids the safety hazards of manual disassembly detection; through synchronous shooting of the multi-angle industrial camera array, the full-coverage area of the blade is covered to obtain clear and continuous high-quality image data; the stretching-in type closed device combined with the air knife cleaning module eliminates water mist interference, and ensures the acquisition reliability under high temperature and high pressure environment; the dynamic adjustment of the light source and the camera parameters adapts to the high-speed rotation of the blade, and improves the crack damage identification precision; the detection process is simplified, the maintenance cost is reduced, and a data basis is provided for intelligent analysis of the blade state. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their description are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0030] Figure 1 The blade image acquisition method effect schematic diagram of the multi-column different direction industrial camera array of the embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of a visual window cleaning module using an aluminum alloy air knife nozzle, according to an embodiment of the present invention.

[0032] The reference numerals in the attached figures include: 1. Enclosed steel pipe; 2. Horizontally sliding and rotating shaft; 3. Visual window; 4. Industrial camera; 5. Lens and focusing device; 6. Camera field of view; 7. Turbine end blades; 8. Surrounding high-intensity light source; 9. Aluminum alloy air knife; 10. Clean airflow; 11. Hydrophobic film. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment provides a method for acquiring full-coverage images of steam turbine blades using a multi-row industrial camera system with coordinated sliding rotation, including:

[0037] The inserted steel pipe is welded to the inside of the steam turbine near the end blades, and visual windows are arranged on both sides of the blades.

[0038] Multiple industrial cameras are arranged in an array within an enclosed, extendable device and fixed on a horizontally sliding and rotating shaft.

[0039] A high-intensity ambient light source is arranged around the visualization window, and a hydrophobic film is pasted on the surface of the window. At the same time, an air knife cleaning module is installed.

[0040] Pre-adjust the focal length, angle, and shooting area of ​​the camera array when the steam turbine is not rotating;

[0041] While the turbine is running, start the camera and light source, adjust the frame rate and shutter speed to acquire images of the blades, and use air knives to clear the viewport.

[0042] As one embodiment of this invention, the extended sealing device includes a sealed steel pipe, a camera array group is fixed inside the steel pipe, and visualization windows are provided at both ends of the steel pipe.

[0043] As an embodiment of the present application, the adjusting process of the camera array group includes adjusting the horizontal position and shooting angle of the camera array through the rotating shaft, so that different cameras cover different areas of the blade.

[0044] As an embodiment of the present application, the air knife cleaning module includes aluminum alloy air knife nozzles arranged along the edge of the window, and the air flow is used to remove the water mist.

[0045] As an embodiment of the present application, the pre-adjustment process includes testing the shooting effect of different camera groups in the stationary state of the steam turbine, and adjusting the focal length and light source illumination angle.

[0046] As an embodiment of the present application, the process of collecting the blade image includes synchronously adjusting the frame rate and shutter speed of the multiple camera array groups during the operation of the steam turbine, to ensure that the image is clear and continuous.

[0047] The module specifically includes:

[0048] (1) Image acquisition module: a plurality of industrial cameras are arranged in multiple columns to form an array, different focusing and lenses are installed on each camera, and the image acquisition in different directions can be realized in the operating state of the steam turbine. The simultaneous acquisition of images of different regions by multiple industrial cameras is achieved, and the related parameters of the industrial camera are adjusted to ensure that the acquired images are clear and continuous.

[0049] (2) Adjustable light path module: fixedly installed on a horizontally slidable horizontal rotating shaft, the combination of different direction industrial cameras is realized by rotating adjustment, and the change of the camera shooting area is realized by sliding, finally realizing the multi-directional full coverage acquisition of the steam turbine blade.

[0050] (3) Stretched closed module: by arranging a closed device in the steam turbine, the acquisition environment and platform required by the image acquisition and light path adjustment modules are built.

[0051] (4) Visualization and cleaning module: based on the stretched closed module, a large enough visual window is added, and a window cleaning device is used to clean the window during the work process, to ensure that there is no water mist remaining on the window to avoid affecting the image acquisition.

[0052] The industrial camera mentioned in the embodiments of the present application plays an important role in the fields of machine vision, scientific research, military science, aerospace, etc., and has been widely used in the industrial field. The main reasons are its high precision, high efficiency, non-contact measurement, automation and intelligence, etc. In the safety detection of steam turbine blades, industrial cameras can specifically solve a series of problems brought by manual detection, reduce the cost of safety detection, and reduce the risk of accidents in the detection process. Industrial cameras have high resolution and accurate image acquisition capability, which not only can further improve the detection accuracy on the basis of manual detection, but also greatly improve the detection efficiency. On the other hand, industrial cameras use non-contact measurement method, which avoids the scratches or damage that may be caused by traditional contact measurement, ensuring the integrity and safety of the measured object. This feature is particularly important in the detection of high-precision and high-value components such as steam turbine blades. Based on the image acquisition of industrial cameras, combined with advanced image processing and analysis technology, an automated and intelligent detection process can be realized. Through the preset detection algorithm and parameters, the camera can automatically identify and classify various defects, and generate detailed detection reports, greatly reducing the risk of human error and improving the accuracy and reliability of detection; on this basis, it also reduces the detection cost, reduces the dependence on manual labor, reduces the labor cost, and avoids the larger maintenance cost caused by problem deterioration. Industrial cameras can also monitor the state and changes of the measured object in real time, and once an abnormality is found, the system will immediately issue a warning signal to remind the maintenance personnel to take timely measures for processing, so as to avoid potential safety hazards, detect outside the safety distance, and avoid the risk of personnel injury. In addition, industrial cameras also have the advantages of strong adaptability and easy integration, which can be combined with other non-destructive testing techniques to form a multi-modal detection method, providing more comprehensive and accurate detection guarantee for industrial production.

[0053] The following is a blade image acquisition method based on multiple industrial camera combinations:

[0054] The inserted steel pipe is welded to the inside of the steam turbine near the end blade, and visual windows are arranged near the two sides of the blade. In the inserted closed device, multiple industrial cameras are arranged in different directions to form multiple industrial camera array groups. The multiple groups of industrial camera arrays are fixed on an adjustable rotating shaft, which can adjust the direction and position of the multiple groups of camera arrays composed of multiple industrial cameras, and can also adjust the industrial camera arrays of different groups during shooting. Each industrial camera is equipped with a lens and a focusing device, and the power cord and data line are connected for power supply and information transmission respectively.

[0055] Surrounding the visual window, a high-intensity light source is arranged to irradiate the shooting area, and the irradiation position can be adjusted by adjusting the direction of the light source. A hydrophobic film is pasted on the surface of the window to prevent water mist from accumulating on the window. A window cleaning module is arranged around the window using an aluminum alloy air knife air nozzle to clean the window during operation, ensuring that there is no water mist remaining on the window, and reducing the influence of the internal environment of the steam turbine during image acquisition.

[0056] First, the blade in the non-rotating state is pre-shot to determine the size of the shooting area with different resolutions, the angle and position of each group of industrial camera arrays are adjusted, the focusing device is observed to determine the shooting effect of each group of industrial camera arrays, and the shaft is adjusted to observe the effect of different industrial camera arrays. In summary, when the steam turbine is not rotating, each device is installed and determined to be able to operate normally and the adjustment effect is good.

[0057] In the working state of the steam turbine, the camera and the light source are turned on for shooting. The irradiation position of the light source is adjusted by an electric drive, and the shooting effect of the camera on the rotating blade in the static state is observed. Different frame rates and shutter speeds are used to shoot the rotating blade, and the window cleaning module is used to clean the visual window during shooting to minimize the influence of the internal environment of the steam turbine on shooting.

[0058] A blade image acquisition method device diagram of multiple industrial camera combinations is designed as shown in Figure 1 The visual window cleaning device layout is shown in Figure 2 The following detailed description is made in conjunction with the drawings:

[0059] (1). As Figure 1 shown, a blade image acquisition method device diagram of multiple industrial camera arrays in different directions is given. A stretch-in steel pipe is welded to the position near the end blade inside the steam turbine, and visual windows are arranged near the two sides of the blade. Multiple industrial cameras are arranged in different directions in the stretch-in closed device to form multiple industrial camera array groups. The multiple industrial camera array groups are fixed on an adjustable shaft, which can adjust the direction and position of the multiple industrial camera groups, and can also adjust the industrial camera array groups during shooting. Each industrial camera is equipped with a lens and a focusing device, and the power cord and data line are connected for power supply and information transmission, respectively.

[0060] (2). Surrounding the visual window, a high-intensity light source is arranged to irradiate the shooting area, and the irradiation position can be adjusted by adjusting the direction of the light source. A hydrophobic film is pasted on the surface of the window to prevent water mist from accumulating on the window. A window cleaning module is arranged around the window using an aluminum alloy air knife air nozzle to clean the window during operation, ensuring that there is no water mist remaining on the window, and reducing the influence of the internal environment of the steam turbine during image acquisition.

[0061] (3). First, the blade in the non-rotating state is pre-shot to determine the size of the shooting area of different resolutions, adjust the angle and position of each group of industrial camera array, cooperate with the focusing device to observe the shooting effect, determine the shooting effect of each group of industrial camera array, and use the rotating shaft to adjust the observation effect of different industrial camera arrays. In summary, when the steam turbine is not rotating, each device is installed and determined to be able to operate normally and the adjustment effect is good.

[0062] (4). In the working state of the steam turbine, the camera and the light source are turned on for shooting, the position of the light source is adjusted by the motor, and the shooting effect of the camera on the rotating blade in the static state is observed. Different frame rates and shutter speeds are used to shoot the rotating blade, and the visual window cleaning module is used to clean the visual window during the shooting process to minimize the impact of the internal environment of the steam turbine on the shooting.

[0063] (5). Figure 2 The layout of the visual window cleaning device is given, the main part is an aluminum alloy air knife, and the water mist and small droplets on the surface of the visual window can be cleaned by the high-strength air knife to ensure that the visual window is not blocked during image acquisition.

[0064] (6). Compared with single industrial camera shooting, multiple industrial cameras can cover a larger range during shooting, and multiple industrial cameras can identify multiple parts of the blade at a time, which is faster. During the shooting process of a single industrial camera, different angles and positions can be used for shooting, and the shooting effect can be more flexible. Multiple identifications of the same part on the blade can be achieved by shooting from multiple angles, which is more accurate.

[0065] (7). According to the above process, a set of multi-directional adjustable blade image acquisition method can be obtained, which can acquire the image of the end blade of the steam turbine in the rotating state in real time without affecting the operation of the steam turbine.

[0066] Based on this, the embodiment of the application provides a kind of multi-column industrial camera coordinated sliding rotating steam turbine blade full coverage image acquisition method, compared with prior art, with the following technical effects:

[0067] (1) In the safety detection of steam turbine blades, the use of industrial cameras with many advantages forms multiple array assemblies, which utilize their high precision, high efficiency, automation and intelligent characteristics to make the detection process more accurate, reliable and safe, fully utilizing the advantages of industrial cameras while making up for their lower pixel count compared to high-speed cameras. By using multiple industrial cameras to form an array for image acquisition, each industrial camera accurately captures a small area, and the combined shooting area of multiple cameras can better improve the clarity. At the same time, using industrial cameras can record and compare detection data at different times, providing valuable suggestions for improving product design methods and equipment maintenance processes. This helps to form a positive feedback closed loop structure to optimize design and maintenance processes and further improve the safety and reliability of equipment.

[0068] (2) In extremely harsh working environments, including high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration, and the combined action of wet steam area water drop erosion, an extended closed space is established, and a visual window is designed for direct image acquisition of the blade. The image data obtained is true and reliable, compared to the simulated image acquisition device in the utility model patent "Fan blade sample image acquisition device" (application number CN202420474390.5), which has more practical value and is more beneficial to subsequent image processing and deep learning; compared to the direct data acquisition on the wind turbine blade in the utility model patent "Wind turbine blade crack image acquisition device" (application number CN201922267105.4), an extended method is used to create a closed space in the harsh environment inside the steam turbine that is conducive to image acquisition. At the same time, multiple industrial cameras of different directions are used to simultaneously acquire images, which is a non-contact acquisition method and will not affect the working state of the steam turbine.

[0069] (3) The use of high-speed cameras that perform well in collecting images of high-speed rotating blades for image acquisition of blades in the running state of the steam turbine solves the shortcomings of manual maintenance of the steam turbine, including difficulty in ensuring maintenance quality, low maintenance efficiency, lack of specialization and standardization, etc. While avoiding safety hazards, simplifying monitoring steps and saving human resources, the invention achieves professional and standardized high-quality and efficient detection without affecting the working state of the steam turbine. At the same time, using industrial cameras instead of manual inspection and sampling can achieve real-time monitoring of blade conditions, improve the safety of steam turbines, and facilitate the timely resolution of safety hazards.

[0070] (4) The invention mainly focuses on the testing technology of steam turbine blades, but can also be applied to other blades. For the design of blade image acquisition methods in the field of blade testing technology, the invention also has certain reference significance.

[0071] Embodiment Two

[0072] In this embodiment, a computer terminal device is provided, comprising:

[0073] one or more processors;

[0074] a memory coupled to the processors, for storing one or more programs;

[0075] When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the full-coverage image acquisition method of steam turbine blade by multi-row industrial camera cooperative sliding rotation described above.

[0076] In this embodiment, a computer readable storage medium is also provided, having a computer program stored thereon, which, when executed by a processor, implements the steps of the full-coverage image acquisition method of steam turbine blade by multi-row industrial camera cooperative sliding rotation described above.

[0077] In this embodiment, an electronic device is also provided, comprising a memory and a processor, the memory having a computer program stored therein, and the processor being configured to run the computer program to perform the steps of the full-coverage image acquisition method of steam turbine blade by multi-row industrial camera cooperative sliding rotation described above.

[0078] In this embodiment, a computer program product is also provided, comprising a computer program which, when executed by a processor, implements the steps of the full-coverage image acquisition method of steam turbine blade by multi-row industrial camera cooperative sliding rotation described above.

[0079] The above program can be run in a processor, or can also be stored in a memory (or called computer readable medium), which includes permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0080] These computer programs (also referred to as programs, software, software applications or applications) can also be loaded onto a computer or other programmable data processing devices, so that a series of operational steps are performed on the computer or other programmable devices to generate a computer-implemented process, so that the instructions executed on the computer or other programmable devices provide steps for implementing the functions specified in the flowchart Figure 1 one flowchart or multiple flowcharts and / or blocks Figure 1 one flowchart or multiple flowcharts and / or blocks

[0081] The present embodiment provides such a device or system. The device is called a multi-column industrial camera cooperative sliding and rotating turbine blade full-coverage image acquisition device, which comprises:

[0082] The extending closure device is welded to the inside of the turbine and is provided with a visual window 3.

[0083] The multi-directional adjustment and shooting device comprises a rotating shaft 2 that can slide horizontally and rotate, and a plurality of groups of industrial camera 4 arrays fixed on the rotating shaft.

[0084] The window cleaning device is arranged at the edge of the visual window 3 and comprises an air knife nozzle and a hydrophobic film 11.

[0085] The dynamic light source device is arranged around the visual window 3 and is used for illuminating the blade shooting area.

[0086] The control and adjustment device is used for pre-adjusting the camera parameters and synchronously controlling the camera array, light source and cleaning device when the turbine is running.

[0087] As an embodiment of the present embodiment, the extending closure device comprises a closed steel pipe 1 shell, high-pressure-resistant glass windows are embedded at both ends of the shell, and a rotating shaft base is fixed inside the steel pipe.

[0088] As an embodiment of the present embodiment, the multi-directional adjustment and shooting device comprises:

[0089] The rotating shaft 2 that can slide horizontally and rotate is installed at the bottom of the rotating shaft.

[0090] The rotating driving mechanism is connected to the plurality of groups of camera arrays.

[0091] The independent focusing mechanism is arranged at the front end of each industrial camera 4.

[0092] As an embodiment of the present embodiment, the window cleaning device comprises:

[0093] The annularly arranged aluminum alloy air knife 9 is arranged at the edge of the window.

[0094] The air flow injection mechanism is connected to the air knife nozzle through a high-pressure pipeline.

[0095] A hydrophobic coating is applied to the surface of the window.

[0096] As an embodiment in the present embodiment, the dynamic light source device comprises an adjustable angle LED lamp group, which is fixed around the window by a support ring. The dynamic light source device adopts a surrounding high-intensity light source.

[0097] As an embodiment in the present embodiment, the control adjustment device comprises:

[0098] A parameter preset unit is configured to set the camera frame rate and shutter speed.

[0099] A synchronous triggering unit is configured to link the light source and the cleaning device.

[0100] A real-time focusing unit is configured to dynamically calibrate the focal length according to the blade rotating speed.

[0101] The camera field of view 6 and the cleaning airflow 10 are both Figure 1 as shown in FIG. 6.

[0102] The system or device is used to realize the functions of the methods in the above embodiments. Each module in the system or device corresponds to each step in the method, and has been described in the method and will not be repeated here.

[0103] Through the above embodiments, the problem of full-coverage image acquisition of the steam turbine blade by the multiple-row industrial camera cooperative sliding rotation in the related art is solved, thereby ensuring the solution to the problems in the prior art.

[0104] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for full coverage image acquisition of a multi-column industrial camera coordinated sliding rotation turbine blade, characterized in that, The method comprises the following steps: Welding a steel pipe into a steam turbine, near the end blade, and arranging visual windows on both sides of the blade; Arranging multiple industrial cameras in an array group in the steel pipe, and fixing the array group on a rotating shaft that can slide horizontally; Arranging a high-intensity light source around the visual window, and pasting a hydrophobic film on the surface of the window, and installing a wind knife cleaning module; Adjusting the focal length, angle, and shooting area of the camera array when the steam turbine is not rotating; Starting the camera and light source when the steam turbine is working, adjusting the frame rate and shutter speed to capture the blade image, and using the wind knife to clean the window.

2. The method of claim 1, wherein, The steel pipe includes a closed steel pipe, a camera array group fixed inside the steel pipe, and visual windows arranged at both ends of the steel pipe.

3. The method of claim 2, wherein, The adjustment process of the camera array group includes adjusting the horizontal position and shooting angle of the camera array through the rotating shaft, so that different cameras cover different areas of the blade.

4. The method of claim 1, wherein, The wind knife cleaning module includes an aluminum alloy wind knife nozzle arranged along the edge of the window, and the nozzle sprays air flow to remove water mist.

5. The method of claim 1, wherein, The pre-adjustment process includes testing the shooting effect of different camera groups when the steam turbine is stationary, and adjusting the focal length and light source irradiation angle.

6. The method of claim 1, wherein, The process of capturing the blade image includes synchronously adjusting the frame rate and shutter speed of multiple camera array groups when the steam turbine is running, to ensure that the image is clear and continuous.

7. A full-coverage image acquisition device for steam turbine blades with coordinated sliding rotation of multiple rows of industrial cameras, characterized in that, The device comprises: A steel pipe welded into a steam turbine and provided with visual windows; A multi-directional adjustment shooting device including a rotating shaft that can slide horizontally and rotate, and multiple industrial camera array groups fixed on the rotating shaft; A window cleaning device arranged at the edge of the visual window, including a wind knife nozzle and a hydrophobic film; A dynamic light source device arranged around the visual window for illuminating the blade shooting area; A control adjustment device for pre-adjusting camera parameters and synchronously controlling the camera array, light source, and cleaning device when the steam turbine is running.

8. A computer terminal device, characterized by One or more processors; Memory coupled to the processor for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the method of any one of claims 1-6. The computer program is executed by the processor to implement the steps of the method of any one of claims 1-6.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method of any one of claims 1-6.

10. A computer program product comprising a computer program, characterized in that, ​

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