Focusing-free high-speed camera turbine blade full-dynamic image acquisition method and device based on sliding guide rail

Abstract

The invention discloses a focusing-free high-speed camera turbine blade full-dynamic image acquisition method and device based on a sliding guide rail, and belongs to the technical field of turbine blade detection.The method includes the steps that a closed steel pipe is welded in a turbine to form a stretching-in type space, and visual windows with hydrophobic membranes are arranged on the two sides, close to a blade, of the steel pipe; a horizontal sliding guide rail is mounted in the steel pipe, a high-speed camera and a reflector which can slide synchronously are arranged on the guide rail to cover the radial range of the blade, and the distance between the camera and the reflector is not changed during sliding; a surrounding light source with an adjustable irradiation direction is arranged near the window; cleaning the window by using a silica gel windshield wiper; when the turbine works, the guide rail slides to adjust the shooting position, and blade images are collected. Real-time complete acquisition of blade images in a working state is realized, data is provided for crack identification, and shutdown maintenance cost and potential safety hazards are reduced.

Description

Technical Field

[0001] This invention belongs to the field of turbine blade inspection technology, and particularly relates to a method and device for acquiring full dynamic images of turbine blades using a high-speed camera based on a sliding guide rail without focusing. Background Technology

[0002] Steam turbines are widely used in power generation, shipbuilding, chemical, and metallurgical industries, and their efficient and stable operation is crucial to industrial systems. As a core component of the steam turbine, the blades are subjected to harsh environments of high temperature, high pressure, high centrifugal force, and erosion by wet steam for extended periods, requiring regular maintenance to check for damage such as cracks, dents, and water erosion. Currently, maintenance mainly relies on manual methods, requiring the turbine to be shut down and the blades disassembled for step-by-step inspection. This process not only consumes a significant amount of time and resources, leading to production interruptions and economic losses, but also poses safety risks during disassembly. Furthermore, manual inspection results are susceptible to the influence of operator experience and subjective factors, making it difficult to guarantee the accuracy and consistency of the inspections. Existing automation solutions, such as the invention patent "An Intelligent Detection Method for Surface Damage of Gas Turbine Blades" (application number CN202410207210.1), improve the objectivity of detection through image recognition, but image acquisition still requires disassembling the blades, failing to address the issues of cost and safety hazards. The invention patents "A Real-time Monitoring Device for Wind Turbine Blade Status" (application number CN202310828200.5) and "A Method, Device and Terminal for Image Acquisition of Blades under Wind Turbine Operating Conditions" (application number CN202110872550.2) can acquire blade images under wind turbine operating conditions without causing power generation loss. While real-time monitoring of wind turbine blades is possible, the internal environment of a steam turbine is far more severe. Its high-speed rotating blades are densely packed and rotate at even faster speeds, and there is interference from high-temperature steam. Directly applying wind turbine blade monitoring technology leads to the following drawbacks: First, the open acquisition scheme cannot withstand the erosion of high-pressure steam and droplets inside the steam turbine, and the images are easily blurred by water mist. Second, there is a lack of optical path adjustment mechanisms adapted to the enclosed space, making it difficult to cover the entire radial range of the blades. Third, the absence of environmental interference resistance devices makes it impossible to guarantee continuously clear imaging conditions. Therefore, existing technologies cannot achieve complete and reliable acquisition of blade images without shutting down the steam turbine, resulting in the inability to provide timely warnings of blade damage and creating potential operational safety hazards. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a method and apparatus for acquiring full dynamic images of turbine blades using a high-speed camera based on a sliding guide rail without focusing, thereby resolving the issues existing in the prior art.

[0004] In a first aspect, to achieve the above objectives, the present invention provides a method for acquiring full dynamic images of turbine blades using a high-speed camera based on a sliding guide rail without focusing, comprising the following steps:

[0005] A closed steel pipe is welded inside the steam turbine to form an extended closed space, and a viewing window is set on both sides of the steel pipe near the blades;

[0006] A horizontal sliding guide rail is installed inside a closed steel pipe, and a high-speed camera and a reflector are arranged on the guide rail so that the high-speed camera and the reflector slide synchronously to cover the radial range of the blade.

[0007] Arrange a surround light source near the visualization window and adjust the direction of the light source so that the light shines directly on the blade;

[0008] With the steam turbine stationary, the high-speed camera is focused to ensure clear imaging during the sliding process;

[0009] While the turbine is running, start the high-speed camera and light source, adjust the shooting position by sliding the guide rail, and use the window cleaning device to remove water mist from the window to acquire images of the blades.

[0010] Optionally, the window cleaning device includes a silicone wiper and a hydrophobic film, wherein the silicone wiper reciprocates along the window surface to remove water mist.

[0011] Optionally, the high-speed camera and the reflector are fixed on a sliding base, and the distance between the camera and the reflector remains unchanged during the sliding process.

[0012] Optionally, the frame rate of the high-speed camera is adjustable to adapt to the acquisition of blade images at different rotational speeds.

[0013] Optionally, the surround light source is a high-intensity light source, and the illumination direction is adjustable to ensure uniform illumination on the blade surface.

[0014] Optionally, the enclosed steel pipe is welded inside the steam turbine near the end blades, creating a stable shooting environment inside the steel pipe to isolate external interference.

[0015] Secondly, the present invention also provides a high-speed camera turbine blade full dynamic image acquisition device based on a sliding guide rail without focusing, for implementing a high-speed camera turbine blade full dynamic image acquisition method based on a sliding guide rail without focusing, the device comprising:

[0016] The closed environment construction module is used to weld closed steel pipes inside the steam turbine to form an extended space, with visualization windows set on both sides of the steel pipes near the blades;

[0017] A sliding optical path module is installed inside a closed steel pipe, including a horizontal sliding guide rail and a high-speed camera and a reflector arranged on the guide rail. The high-speed camera and the reflector can slide synchronously to cover the radial range of the blade.

[0018] The light source control module includes a surround light source arranged near the visualization window, whose illumination direction can be adjusted to directly illuminate the blade surface.

[0019] The window maintenance module is used to remove water mist interference from the window surface;

[0020] The image acquisition and control module is used to focus the high-speed camera when the turbine is stationary, and to start the high-speed camera and light source when the turbine is in operation. The camera position is adjusted by sliding the guide rail and the blade images are acquired.

[0021] Thirdly, the present invention also provides a computer terminal device, comprising:

[0022] One or more processors;

[0023] A memory, coupled to the processor, for 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 above-described first aspect of the method for acquiring full dynamic images of turbine blades using a high-speed camera based on a sliding guide rail without focusing.

[0025] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, it implements the steps of the high-speed camera turbine blade full dynamic image acquisition method based on sliding guide rail without focusing described in the first aspect above.

[0026] Fifthly, the present invention also provides a computer program product, including a computer program, characterized in that, when the computer program is executed by a processor, it implements the steps of the above-described first aspect of the high-speed camera turbine blade full dynamic image acquisition method based on sliding guide rail without focusing.

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

[0028] This invention provides a high-speed camera-based, focus-free, full-dynamic image acquisition method for turbine blades using a sliding guide rail. This method enables real-time image acquisition of turbine end-blades, avoiding disassembly and maintenance. A closed, extended steel pipe isolates the high-temperature, high-pressure environment, while a viewing window and hydrophobic film resist steam interference. The sliding guide rail moves the high-speed camera and reflector synchronously, capturing complete radial images of the blades without repeated focusing. A surround light source enhances illumination on the blade surface, and a viewing window cleaning device continuously removes water mist to ensure clear imaging. The resulting continuous images provide reliable data for identifying blade cracks and dents, significantly reducing downtime maintenance costs and safety hazards. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0030] Figure 1 This is a diagram of an apparatus for a slidingly adjustable blade image acquisition method according to an embodiment of the present invention;

[0031] Figure 2 This is a layout diagram of the visual window cleaning device according to an embodiment of the present invention.

[0032] The attached reference numerals include: 1. High-speed camera; 2. Enclosed steel pipe; 3. Camera and sliding base; 4. Visual window; 5. Reflector; 6. Motor; 7. Light field of view; 8. Turbine end blade; 9. Surround light source; 10. Horizontal sliding guide rail; 11. Silicone wiper; 12. Wiper movement direction; 13. 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 high-speed camera method for acquiring full dynamic images of turbine blades using a sliding guide rail without focusing, including:

[0037] A closed steel pipe is welded inside the steam turbine to form an extended closed space, and a viewing window is set on both sides of the steel pipe near the blades;

[0038] A horizontal sliding guide rail is installed inside a closed steel pipe, and a high-speed camera and a reflector are arranged on the guide rail so that the high-speed camera and the reflector slide synchronously to cover the radial range of the blade.

[0039] Arrange a surround light source near the visualization window and adjust the direction of the light source so that the light shines directly on the blade;

[0040] With the steam turbine stationary, the high-speed camera is focused to ensure clear imaging during the sliding process;

[0041] While the turbine is running, start the high-speed camera and light source, adjust the shooting position by sliding the guide rail, and use the window cleaning device to remove water mist from the window to acquire images of the blades.

[0042] As one embodiment of this invention, the window cleaning device includes a silicone wiper and a hydrophobic film, wherein the silicone wiper reciprocates along the surface of the window to remove water mist.

[0043] In one embodiment of this invention, the high-speed camera and the reflector are fixed on a sliding base, and the distance between the camera and the reflector remains constant during the sliding process.

[0044] As one implementation method in this embodiment, the frame rate of the high-speed camera is adjustable to adapt to the acquisition of blade images at different rotational speeds.

[0045] As one implementation method in this embodiment, the surround light source is a high-intensity light source with an adjustable illumination direction to ensure uniform illumination on the blade surface.

[0046] As one implementation method in this embodiment, the enclosed steel pipe is welded inside the steam turbine near the end blades, and a stable shooting environment is formed inside the steel pipe to isolate external interference.

[0047] This invention employs an insertable structure and designs an adjustable method for image acquisition and real-time monitoring of steam turbine blades. Using this method, blades can be monitored in real time while the steam turbine is running, avoiding various drawbacks of manual maintenance, reducing maintenance costs, and mitigating risks during maintenance. Considering the current state of blade monitoring and image acquisition in China, an insertable image acquisition method for the inside of the steam turbine is adopted to create an environment for camera shooting. Based on an analysis of the actual conditions of the steam turbine and the current state of blade monitoring and image acquisition methods in China, an insertable image acquisition method for the inside of the steam turbine is adopted. A high-speed camera and reflector are fixed on a sliding guide rail to build an adjustable visualization optical path. Combined with optical path and visualization cleaning modules, images of high-speed rotating blades are acquired. The basic modules of this invention include:

[0048] (1) Adjustable optical path module: A horizontal sliding guide rail is arranged under the high-speed camera and the reflector, so that the high-speed camera and the reflector can slide simultaneously to achieve complete acquisition of the radial image of the blade. Since the distance between the high-speed camera and the reflector does not change during the adjustment process, the distance from the high-speed camera to the blade changes little. After sliding adjustment, focusing can be omitted and image acquisition can be performed directly.

[0049] (2) Image acquisition module: A high-resolution, high-frame-rate high-speed camera is used to continuously acquire images while the steam turbine is running. By changing the frame rate and shutter speed, the acquired images are kept clear and continuous.

[0050] (3) Extended enclosed module: An enclosed steel pipe is arranged inside the steam turbine to build an acquisition environment and platform for modules such as image acquisition and optical path adjustment;

[0051] (4) Visualization and cleaning module: On both sides of the extended closed steel pipe near the blades, a sufficiently large visual window is set. A hydrophobic film is placed on the window to prevent water mist accumulation. The window is cleaned by a window cleaning device to ensure that the window is not affected by water vapor inside the turbine during operation.

[0052] High-speed cameras excel in capturing images of high-speed rotating turbine blades due to their advantages such as real-time signal capture, rapid signal conversion and transmission, instant playback, and clear and intuitive images. They can record dynamic images at a very high frequency, typically 1000 to 10000 frames per second. While this may result in lower pixel counts per image, it is sufficient to meet the requirements for clear imaging of high-speed rotating blades. Furthermore, the high image stability, high transmission capacity, and high anti-interference capability of high-speed cameras ensure their reliable application in complex industrial environments, providing strong technical support for the safety inspection of turbine blades. In the safety inspection of turbine blades, high-speed cameras can capture instantaneous images of blades in a high-speed rotating state, providing direct evidence of key information such as blade deformation, wear, and cracks. This efficient image acquisition capability helps to quickly determine the condition of the blades, thereby enabling timely measures to prevent potential safety hazards. Using an extended, enclosed pipe inserted into the turbine close to the blades in operation, and then using an adjustable-position high-speed camera to acquire images of the blades, not only does not affect the rotation of the turbine in operation, but also allows for complete acquisition of images of various parts of the blades.

[0053] The following is a method for acquiring images of blades that can be adjusted by sliding the blade:

[0054] An extended steel pipe is welded inside the turbine near the end blades, and visualization windows are arranged near both sides of the blades. An adjustable guide rail is fixed inside the extended enclosure, and a high-speed camera and a reflector are positioned on the guide rail, allowing both to slide simultaneously in one direction. During the arrangement, it is ensured that the camera's adjustment range covers the entire blade, and that the distance between the camera and the blade remains essentially constant throughout the adjustment process. This avoids multiple focusing adjustments during dynamic monitoring, preparing for subsequent dynamic testing.

[0055] A high-intensity surround light source is placed near the visualization window, and the direction of the light source is adjusted to directly illuminate the end blades. A hydrophobic film is placed on the window to prevent water mist accumulation, and a window cleaning module is installed around the window using silicone wipers to clean the window during operation, ensuring that the visualization light path from the camera to the blades is minimally affected by environmental factors such as water mist inside the turbine.

[0056] With the turbine stationary, focus the camera on the sliding guide rail to ensure clear images during sliding. Adjust the positions of the camera and light source to determine the camera's image acquisition area and the light source's illumination position. Take pre-shots of the blades in their stationary state to determine the camera's shooting area and coverage, and acquire images at different resolutions. With the turbine stationary, install and verify that all devices operate normally and perform effectively.

[0057] With the turbine operating, the camera and light source are turned on for shooting. The positions of the camera and reflector are adjusted via an electric slide rail, and the position of the light source is also adjusted accordingly. Different frame rates and shutter speeds are used to photograph the rotating blades. During the shooting process, a window cleaning module is used to clean the visualization window, ensuring that the influence of the turbine's internal environment on the shooting is minimized.

[0058] The proposed device for image acquisition using an extendable, adjustable blade is shown in the attached diagram. Figure 1 The layout diagram of the visual window cleaning device is attached. Figure 2 The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples:

[0059] (1). For example Figure 1 The diagram illustrates a device for acquiring images of turbine blades using an extendable, adjustable slide mechanism. A square hollow steel tube is inserted into the turbine and welded to the vicinity of the turbine's end blades. Visual viewing windows are positioned on the extendable steel tube near both sides of the blades. An adjustable slide rail is fixed within the extendable enclosed device, and a high-speed camera and a reflector are positioned on the rail, allowing both to slide simultaneously in a specific direction. During this arrangement, it is ensured that the camera's adjustment range covers the entire blade, and that the distance between the camera and the blade remains essentially constant throughout the adjustment process. This avoids multiple refocusing adjustments during dynamic monitoring, preparing the device for subsequent dynamic detection.

[0060] (2) A high-intensity surround light source is placed near the visualization window, and the direction of the light source is adjusted so that it shines directly on the end blade. A hydrophobic film is placed on the window to prevent water mist accumulation. A window cleaning module is placed around the window using silicone wipers to clean the window during operation, ensuring that the visualization light path from the camera to the blade is as minimally affected as possible by environmental factors such as water mist inside the turbine.

[0061] (3) When the turbine is stationary, focus the camera on the sliding guide rail to ensure clear images during the sliding process. Adjust the positions of the camera and light source to determine the camera image acquisition area and the light source illumination position. Take pre-shots of the blades in the stationary state to determine the camera's shooting area and coverage range, and acquire images at different resolutions. When the turbine is not rotating, install and confirm that all devices can operate normally and have good adjustment effects.

[0062] (4) With the turbine in operation, turn on the camera and light source to take pictures. Adjust the position of the camera and reflector using the electric slide rail, and adjust the position of the light source accordingly. Use different frame rates and shutter speeds to take pictures of the rotating blades. During the shooting process, use the window cleaning module to clean the visualization window to ensure that the impact of the turbine's internal environment on the shooting is minimized.

[0063] (5). Figure 2 A layout diagram of the visualization window cleaning device is provided. The main part is a silicone wiper. Water mist and small droplets on the surface of the visualization window can be cleaned by pushing and pulling the wiper back and forth, ensuring that the visualization window is unobstructed during image acquisition.

[0064] (6) Following the above process, a set of blade image acquisition methods with adjustable sliding insertion can be obtained, which can fully acquire images of the turbine end blades in real time under rotating conditions without affecting the operation of the turbine.

[0065] Based on this, the present invention provides a high-speed camera method for acquiring full dynamic images of turbine blades using a sliding guide rail without focusing. Compared with the prior art, the advantages of the present invention include:

[0066] (1) Using a high-speed camera to replace manual inspection and sampling solves the shortcomings of the image acquisition method in the invention patent "An Intelligent Detection Method for Surface Damage of Gas Turbine Blades" (application number CN202410207210.1) and manual turbine maintenance, including difficulty in ensuring maintenance quality, low maintenance efficiency, and lack of specialization and standardization. While avoiding safety hazards, it simplifies the monitoring steps, saves human resources, and the high-speed camera performs excellently in acquiring high-speed rotating images. By acquiring images of high-speed rotating blades during turbine operation, it is possible to achieve professional, standardized, high-quality, and high-efficiency detection without affecting the turbine's operating status.

[0067] (2) The entire device is subjected to the combined effects of high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration, and water droplet erosion in the wet steam zone inside the steam turbine. An extended enclosed space was established, and a visualization window was designed to directly acquire images of the blades, and the acquired image data is real and reliable. Compared with the invention patent "A Real-time Monitoring Device for Wind Turbine Blade Status" (application number CN202310828200.5) and the invention patent "A Method, Device and Terminal for Acquiring Blade Images under Wind Turbine Operating Conditions" (application number CN202110872550.2), which directly acquire data on the wind turbine blades, this device takes into account the internal environment of the steam turbine and adopts a sliding adjustable optical path to achieve full coverage of blade image acquisition.

[0068] (3) This invention mainly focuses on the testing technology of steam turbine blades, but it can also be applied to other blades. This invention also has certain reference value for the design of blade image acquisition methods in the field of blade testing technology.

[0069] Example 2

[0070] In this embodiment, a computer terminal device is provided, including:

[0071] One or more processors;

[0072] A memory, coupled to the processor, for storing one or more programs;

[0073] When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the above-described high-speed camera turbine blade full dynamic image acquisition method based on sliding guide rail without focusing.

[0074] In this embodiment, a computer-readable storage medium is also provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the above-described high-speed camera turbine blade full dynamic image acquisition method based on sliding guide rail without focusing.

[0075] In this embodiment, an electronic device is also provided, including a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to execute the steps of the above-described high-speed camera turbine blade full dynamic image acquisition method based on sliding guide rail without focusing.

[0076] In this embodiment, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps of the above-described high-speed camera turbine blade full dynamic image acquisition method based on sliding guide rail without focusing.

[0077] The aforementioned program can run on a processor or be stored in memory (or a computer-readable medium). Computer-readable media include both permanent and non-permanent, removable and non-removable media, and information storage can be achieved by any method or technology. 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, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0078] These computer programs may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes can be implemented using different modules, and different steps can be implemented using different modules.

[0079] This embodiment provides such a device or system. The device, referred to as a high-speed camera turbine blade full-motion image acquisition device based on a sliding guide rail and requiring no focusing, includes:

[0080] A closed environment construction module is used to weld a closed steel pipe 2 inside the steam turbine to form an extended space, and a visualization window 4 is set on both sides of the steel pipe near the blades;

[0081] A sliding optical path module is installed inside a closed steel pipe 2, including a horizontal sliding guide rail 10 and a high-speed camera 1 and a reflector 5 arranged on the guide rail. The high-speed camera 1 and the reflector 5 can slide synchronously to cover the radial range of the blade.

[0082] The light source control module includes a surround light source 9 arranged near the visualization window 4, whose illumination direction can be adjusted to directly illuminate the blade surface.

[0083] The window maintenance module is used to remove water mist interference from the window surface;

[0084] The image acquisition control module is used to focus the high-speed camera 1 when the turbine is stationary, and to start the high-speed camera 1 and the light source when the turbine is in operation, and to adjust the shooting position and acquire blade images by sliding the guide rail.

[0085] As one implementation method in this embodiment, the window maintenance module includes:

[0086] A hydrophobic membrane of 13 units is applied to the surface of the visualization window 4 to prevent water mist from adhering;

[0087] The mechanical cleaning unit includes a silicone wiper 11 and a drive mechanism, which drives the silicone wiper 11 to reciprocate along the surface of the window to remove residual droplets.

[0088] As one implementation method in this embodiment, the slidable optical path module further includes:

[0089] The linkage base unit fixes the high-speed camera 1 and the reflector 5, ensuring that the distance between them remains constant during the sliding process.

[0090] As one implementation method in this embodiment, the image acquisition control module includes:

[0091] The frame rate adjustment unit dynamically adjusts the shooting frame rate of the high-speed camera 1 to adapt to changes in blade rotation speed.

[0092] As one implementation method in this embodiment, the light source control module includes:

[0093] The light source positioning unit adjusts the illumination angle of the surround light source 9 to ensure uniform illumination on the blade surface.

[0094] As one implementation method in this embodiment, in the closed environment construction module, the closed steel pipe 2 is welded to the inner wall of the steam turbine near the end blades, and its internal space is isolated from high temperature and high pressure interference.

[0095] Light field of view 7 and wiper movement direction 12, as shown Figure 1 As shown.

[0096] The system or apparatus is used to implement the functions of the methods in the above embodiments. Each module in the system or apparatus corresponds to each step in the method, as has been described in the method and will not be repeated here.

[0097] The above implementation method solves the problem of high-speed camera turbine blade full dynamic image acquisition based on sliding guide rail without focusing in related technologies, thereby ensuring that the problems existing in the prior art are solved.

[0098] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for acquiring full dynamic images of turbine blades using a high-speed camera based on a sliding guide rail without focusing, characterized in that, Includes the following steps: A closed steel pipe is welded inside the steam turbine to form an extended closed space, and a viewing window is set on both sides of the steel pipe near the blades; A horizontal sliding guide rail is installed inside a closed steel pipe, and a high-speed camera and a reflector are arranged on the guide rail so that the high-speed camera and the reflector slide synchronously to cover the radial range of the blade. Arrange a surround light source near the visualization window and adjust the direction of the light source so that the light shines directly on the blade; With the steam turbine stationary, the high-speed camera is focused to ensure clear imaging during the sliding process; While the turbine is running, start the high-speed camera and light source, adjust the shooting position by sliding the guide rail, and use the window cleaning device to remove water mist from the window to acquire images of the blades.

2. The method according to claim 1, characterized in that, The window cleaning device includes a silicone wiper and a hydrophobic film. The silicone wiper moves back and forth along the surface of the window to remove water mist.

3. The method according to claim 1, characterized in that, The high-speed camera and the reflector are fixed on a sliding base, and the distance between the camera and the reflector remains unchanged during the sliding process.

4. The method according to claim 1, characterized in that, The frame rate of the high-speed camera is adjustable to adapt to the acquisition of blade images at different rotational speeds.

5. The method according to claim 1, characterized in that, The surrounding light source is a high-intensity light source, and the illumination direction is adjustable to ensure uniform illumination on the blade surface.

6. The method according to claim 1, characterized in that, The enclosed steel pipe is welded inside the steam turbine near the end blades, creating a stable shooting environment inside the steel pipe to isolate external interference.

7. A high-speed camera-based, focus-free, full-dynamic image acquisition device for steam turbine blades based on a sliding guide rail, characterized in that, The device includes: The closed environment construction module is used to weld closed steel pipes inside the steam turbine to form an extended space, with visualization windows set on both sides of the steel pipes near the blades; A sliding optical path module is installed inside a closed steel pipe, including a horizontal sliding guide rail and a high-speed camera and a reflector arranged on the guide rail. The high-speed camera and the reflector can slide synchronously to cover the radial range of the blade. The light source control module includes a surround light source arranged near the visualization window, whose illumination direction can be adjusted to directly illuminate the blade surface. The window maintenance module is used to remove water mist interference from the window surface; The image acquisition and control module is used to focus the high-speed camera when the turbine is stationary, and to start the high-speed camera and light source when the turbine is in operation. The camera position is adjusted by sliding the guide rail and the blade images are acquired.

8. A computer terminal device, characterized in that, include: One or more processors; A 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 perform the steps of the method as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-6.

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