Rotor end guard ring deformation identification method and related device

Abstract

The invention relates to a retaining ring deformation identification method for a rotor end portion and a related device, a retaining ring is installed at the rotor end portion of a generator, and the retaining ring is provided with a mark; the method comprises the following steps: acquiring initial position information corresponding to an identifier of the retaining ring in a static state; acquiring a detection image of the retaining ring at the first rotating speed, and determining detection position information corresponding to the identifier in the detection image; and determining deformation information of the retaining ring at the first rotating speed according to the initial position information and the detection position information. According to the method, by comparing the initial position information with the detection position information, the displacement amount of the identifier can be accurately measured, so that the deformation condition of the retaining ring is evaluated.

Description

Technical Field

[0001] This application relates to the technical field of generators, and particularly to a method for identifying the deformation of a retaining ring at the rotor end and related devices. Background Art

[0002] At present, as an important part of the power grid for peak shaving, frequency modulation, and standby power supply, the performance of variable-speed pumped-storage units directly affects the stability and reliability of the power system. Especially for the retaining ring at the rotor end of the generator, due to long-term exposure to high-speed rotation and complex mechanical stress, radial deformation is likely to occur, affecting the safe operation and service life of the unit. Related technologies use simulation calculation methods to predict the deformation of the retaining ring, but there are often deviations due to the lack of accurate experimental data, making it difficult to accurately reflect the actual working conditions. Summary of the Invention

[0003] Embodiments of this application provide a method for identifying the deformation of a retaining ring at the rotor end and related devices to solve the above problems.

[0004] To achieve the above object, according to the first aspect of this application, a method for identifying the deformation of a retaining ring at the rotor end is provided. The retaining ring is installed at the rotor end of the generator, and there is a mark on the retaining ring. The method includes:

[0005] Obtain the initial position information corresponding to the mark on the retaining ring in the stationary state;

[0006] Obtain the detection image of the retaining ring at the first rotational speed, and determine the detection position information corresponding to the mark in the detection image;

[0007] Determine the deformation information of the retaining ring at the first rotational speed according to the initial position information and the detection position information.

[0008] Optionally, the determining the deformation information of the retaining ring at the first rotational speed according to the initial position information and the detection position information includes:

[0009] Determine the first displacement information of the mark in the detection image according to the initial position information and the detection position information;

[0010] Determine the second displacement information of the mark in space according to the first displacement information and the preset calibration relationship;

[0011] Determine the deformation information of the retaining ring at the first rotational speed according to the second displacement information.

[0012] Optionally, the determining the deformation information of the retaining ring at the first rotational speed according to the second displacement information includes:

[0013] Obtain a first distance between the identifier corresponding to the initial position information and the center line of the guard ring;

[0014] Based on the second displacement information and the first distance, determine a second distance between the identifier and the center line of the guard ring;

[0015] Based on the difference between the first distance and the second distance, determine deformation information of the guard ring in the radial direction as the deformation information of the guard ring at the first rotational speed.

[0016] Optionally, the first displacement information is used to indicate the number of pixel points between two positions in the detection image, and the preset calibration relationship is determined according to the following steps:

[0017] Obtain a calibration image including a preset scale;

[0018] Based on the number of pixel points representing the preset scale in the calibration image and the dimension information of the preset scale, obtain dimension information corresponding to a single pixel point in the calibration image;

[0019] Take the dimension information corresponding to the single pixel point as the preset calibration relationship.

[0020] Optionally, the method further includes:

[0021] Determine the association relationship between the detection position information and the deformation information at the first rotational speed;

[0022] Based on the detection position information and the association relationship of the guard ring at the second rotational speed, determine the deformation information of the guard ring at the second rotational speed.

[0023] Optionally, the detection image of the guard ring at the first rotational speed is obtained by an image acquisition device, and the method further includes:

[0024] Based on the first rotational speed, adjust shooting parameters of the image acquisition device, where the shooting parameters include at least one of a shooting position and a shooting lens specification.

[0025] Optionally, the adjusting the shooting parameters of the image acquisition device based on the first rotational speed includes:

[0026] Based on the first rotational speed, determine the linear velocity of the identifier on the guard ring;

[0027] Based on the linear velocity of the identifier and the acquisition time interval, determine the movement path of the identifier during the shooting process;

[0028] Based on the movement path of the identifier during the shooting process, adjust the shooting parameters so that the movement path of the identifier during the shooting process is within the shooting range corresponding to the shooting parameters.

[0029] According to the second aspect of the present application, an identification device for the deformation of the retaining ring at the rotor end provided by the embodiments of the present application further includes:

[0030] An acquisition module, configured to acquire the initial position information corresponding to the identifier when the retaining ring is in a stationary state;

[0031] An identification module, configured to acquire a detection image of the retaining ring at a first rotational speed and determine the detection position information corresponding to the identifier in the detection image;

[0032] A determination module, configured to determine the deformation information of the retaining ring at the first rotational speed according to the initial position information and the detection position information.

[0033] According to the third aspect of the present application, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, any one of the rotor end retaining ring deformation identification methods provided by the embodiments of the present application is implemented.

[0034] According to the fourth aspect of the present application, an embodiment of the present application further provides an electronic device, including:

[0035] A memory, on which a computer program is stored;

[0036] A processor, configured to execute the computer program in the memory to implement any one of the rotor end retaining ring deformation identification methods provided by the embodiments of the present application.

[0037] Some embodiments of this specification at least include the following beneficial effects: By photographing the identifier on the retaining ring and using an image processing algorithm to analyze the position change of the identifier at different rotational speeds, the accurate measurement of the radial deformation of the retaining ring is realized; It is possible to measure the deformation of the retaining ring without contacting the retaining ring, avoiding the influence of sensor installation on the operation of the equipment, and reducing the system cost and installation complexity.

[0038] Other features and advantages of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] To more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings, where the same reference numerals in the following description represent the same parts.

[0041] Figure 1 is an application scenario diagram of a method for identifying the deformation of the retaining ring at the rotor end according to some embodiments of this specification;

[0042] Figure 2 is an exemplary flowchart of a method for identifying the deformation of the retaining ring at the rotor end according to some embodiments of this specification;

[0043] Figure 3 is an exemplary schematic diagram of a retaining ring according to some embodiments of this specification;

[0044] Figure 4 is an exemplary schematic diagram of a marked point according to some embodiments of this specification;

[0045] Figure 5 is an exemplary schematic diagram of determining the second displacement according to some embodiments of this specification;

[0046] Figure 6 is a schematic structural diagram of a device for identifying the deformation of the retaining ring at the rotor end according to some embodiments of this specification;

[0047] Figure 7 is a schematic structural diagram of an electronic device according to some embodiments of this specification. Detailed implementation manners

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0049] To facilitate the understanding of the implementation solutions provided in the embodiments of the present application, the relevant application background of the method for identifying the deformation of the retaining ring at the rotor end provided in the embodiments of the present application will be described first.

[0050] A variable-speed pumped-storage unit is an efficient energy storage and power generation device, and the retaining ring at the end of its generator rotor is a key core component for fixing the excitation winding. During operation, the retaining ring needs to withstand complex mechanical stresses and centrifugal forces, especially under variable-speed operating conditions.

[0051] At present, there are certain limitations in the deformation measurement method of the retaining ring. Traditional measurement means usually rely on contact sensors or mechanical measurement tools, which are not only complex in operation and limited in accuracy, but also difficult to meet the dynamic measurement requirements of high-speed rotating components. In addition, when the relevant simulation calculation methods predict the radial deformation of the retaining ring, there are often deviations due to the lack of accurate experimental data, and it is difficult to accurately reflect the actual working conditions.

[0052] In view of this, some embodiments of this specification provide a method for identifying the deformation of the retaining ring at the rotor end. By photographing the marks on the retaining ring and using image processing algorithms to analyze the position changes of the marks at different rotational speeds, the accurate measurement of the radial deformation of the retaining ring can be achieved. It not only overcomes the limitations of the traditional contact sensor method and laser scanning method, but also provides more intuitive and accurate deformation data; uses a high-speed camera as the photographing device, and the photographing speed can reach the microsecond level, which can effectively measure the radial deformation of the retaining ring at the rotor end during high-speed rotation; adopts a non-contact measurement method, with a wide measurement range, which can effectively measure the large radial deformation of the retaining ring at the rotor end, and at the same time effectively avoid the collision between the measurement device and the retaining ring; has good anti-electromagnetic interference ability and can work normally in a strong magnetic field environment.

[0053] Figure 1 It is an application scenario diagram of the method for identifying the deformation of the retaining ring at the rotor end shown in some embodiments of this specification.

[0054] As Figure 1 shown, the application scenario of the method for identifying the deformation of the retaining ring at the rotor end may include an image acquisition device and a control device.

[0055] The image acquisition device is used to capture the data of the marks on the rotor end. In some embodiments, the image acquisition device includes, but is not limited to, cameras, video cameras, other devices with photographing functions (such as mobile phones, tablets, etc.). The camera may include a monocular camera, a binocular camera, a depth camera, etc. The image acquisition device can record a video composed of multiple image frames captured at multiple time points.

[0056] In some embodiments, the position and angle of the image acquisition device can be selected according to the specific application scenario, and it is necessary to ensure that the rotational path of the marks on the rotor end can be fully covered. For example, when there is a marking line on the rotor end, the image acquisition device can be installed at a position perpendicular to the plane where the marks are located to ensure that the photographing angle is perpendicular to the plane where the marks are located and obtain the detection image of the marks.

[0057] In some embodiments, the image acquisition device is located directly in front of the plane where the marks are located, and the detection image is an image taken directly facing the plane where the marks are located.

[0058] In some embodiments, the image acquisition device can be mounted on a target environment based on a mounting structure. In some embodiments, the mounting structure can use screws, adhesives, or other mounting structures. In some embodiments, any suitable mounting structure can also be used.

[0059] The control device can process data and / or information obtained from other devices or system components. The control device can execute program instructions based on this data, information, and / or processing results to perform one or more functions described in this application. In some embodiments, the control device can include one or more sub-processing devices (e.g., a single-core processing device or a multi-core multi-chip processing device). By way of example only, a Central Processing Unit (CPU), an Application-Specific Integrated Circuit (ASIC), an Application-Specific Instruction-set Processor (ASIP), a Graphics Processing Unit (GPU), etc., or any combination thereof.

[0060] In some embodiments, the application scenario can also include some or more other devices, such as a network, a storage device, etc. The network can include any suitable wired or wireless network that can facilitate the exchange of information and / or data. The storage device is used to store data, instructions, and / or any other information.

[0061] In some embodiments, the application scenario can also include a user terminal (not shown in the figure), and the user terminal refers to one or more terminal devices or software used by the user. In some embodiments, the one or more users who use the user terminal can include users who directly use the service of the method for identifying the deformation of the retaining ring at the rotor end, and can also include other relevant users. In some embodiments, the user terminal can be one or any combination of other devices with input and / or output functions, such as a mobile device, a tablet computer, a laptop computer, a desktop computer, etc.

[0062] In some embodiments, the application scenario can be applied to various occasions. For example, in a power plant, through the method disclosed in the embodiments of this specification, the state of the retaining ring at the rotor end of the generator can be monitored regularly or in real time to ensure its structural integrity and prevent failures caused by mechanical stress; for another example, it can also be applicable to other occasions where the deformation of rotating components needs to be monitored.

[0063] It should be noted that the application scenarios of the identification method for the retaining ring deformation at the rotor end are provided for illustrative purposes only and are not intended to limit the scope of this specification. For those of ordinary skill in the art, various changes and modifications can be made according to the description of this specification. For example, the application scenarios can also include databases, information sources, etc. Also, for example, the application scenarios can be implemented on other devices to achieve similar or different functions. However, these changes and modifications will not deviate from the scope of this specification.

[0064] Figure 2 is an exemplary flowchart of the identification method for the retaining ring deformation at the rotor end shown in some embodiments of this specification. In some embodiments, process 200 can be executed based on a control device. As Figure 2 shown, process 200 includes the following steps.

[0065] Step 210, obtain the initial position information corresponding to the identifier when the retaining ring is in a stationary state.

[0066] The retaining ring is installed at the rotor end of the generator, and identifiers are provided on the retaining ring.

[0067] Figure 3 is an exemplary schematic diagram of the retaining ring shown in some embodiments of this specification.

[0068] In some embodiments, as Figure 3 shown, the retaining ring is fixed at the position of the rotor winding end.

[0069] The identifier can be a preset point, line, or other shape.

[0070] Figure 4 is an exemplary schematic diagram of the marked point shown in some embodiments of this specification.

[0071] In some embodiments, as Figure 4 shown, the identifier can be a marked point on the cross-section of the retaining ring.

[0072] The stationary state can be when the rotor of the generator is in a stationary non-operating state, or in a known preset state (for example, the state just after installation or maintenance).

[0073] The initial position information refers to the coordinates or positions of the identifiers marked on the retaining ring under specific reference conditions (such as the rotor stationary state or a known standard state). For example, the initial position information includes the center point pixel coordinates, the coordinates of the bounding box, or the contour of the object marked on the surface of the retaining ring in a preset coordinate system. The contour is used to describe the edge shape of the identifier. The contour can be a set of pixel points, and the pixel points are connected to form the boundary of the identifier.

[0074] In some embodiments, the initial position information may include pixel coordinates identified in the captured initial image, or a physical position in space. For example, the control device may extract the identified pixel coordinates from the initial image through image processing algorithms (such as edge detection, feature point matching, etc.), or calculate the physical coordinates of the identification in space based on stereo vision, laser scanning, or combined with known geometric relationships.

[0075] In some embodiments, the pixel coordinates may be a two-dimensional coordinate point (a, b), where a represents the position of a certain point (such as the center point) of the identification in the horizontal direction of the image, and b represents the position of a certain point (such as the center point) of the identification in the vertical direction of the image. The pixel coordinates may use the upper left corner of the image as the origin (0, 0).

[0076] In some embodiments, the physical position refers to the coordinates of the identification in a certain space coordinate system. The space coordinate system may be two-dimensional (such as a plane coordinate system) or three-dimensional (such as a space coordinate system), depending on the application scenario and requirements. For example, in a two-dimensional space, objects on the end plane of the rotor can be located, and the physical position can be represented by a pair of coordinates (c, d), where c represents the position of the identification in the horizontal direction and d represents the position of the identification in the vertical direction.

[0077] In some embodiments, the control device can also determine the calibration parameters of the image acquisition device, such as internal parameters (such as focal length, principal point position) and external parameters (such as the attitude of the camera relative to the object), through a calibration plate or other known geometric shapes; based on the calibration parameters, transform the pixel coordinates of the identification to the physical coordinates of the identification in space through a projection matrix.

[0078] Step 220, obtain a detection image of the retaining ring at the first rotational speed, and determine the detection position information corresponding to the identification in the detection image.

[0079] The first rotational speed refers to the rotational speed of the rotor (such as the rotor of a generator). The first rotational speed can be any selected rotational speed value, which can be determined according to the actual application scenario and test requirements. By selecting different rotational speeds, it can help evaluate the deformation of the retaining ring under different working conditions.

[0080] The first rotational speed can be one or more preset rotational speeds.

[0081] The detection image refers to an image including the identification on the retaining ring captured at the first rotational speed.

[0082] In some embodiments, the control device may be communicatively connected to the image acquisition device, and the image acquisition device may record a video composed of multiple image frames captured at multiple time points. In some embodiments, the image acquisition device may send the detection image in real time (e.g., by streaming) to the control device, or send it to the control device based on a preset time interval.

[0083] The detection position information refers to the pixel coordinates marked in the detection image.

[0084] In some embodiments, the control device may extract the pixel coordinates marked in the detection image from the detection image through image processing algorithms (such as edge detection, feature point matching, etc.).

[0085] In some embodiments, the control device may determine the detection position information based on the detection image through a detection model, and the detection model is a machine learning model.

[0086] The detection model is a model or algorithm for determining the detection position information.

[0087] In some embodiments, the detection model is a machine learning model. For example, the detection model may include any one or a combination of a Convolutional Neural Networks (CNN) model, a Neural Networks (NN) model, or other custom model structures, etc.

[0088] In some embodiments, the input of the detection model includes the detection image, and the output may include the detection position information.

[0089] In some embodiments, the detection model may be trained based on a large number of labeled training samples through various feasible methods. For example, the parameters may be updated based on the gradient descent method. An exemplary training process includes: inputting multiple labeled training samples into the initial detection model, constructing a loss function through the labels and the results of the initial detection model, and iteratively updating the parameters of the initial detection model based on the loss function through gradient descent or other methods. When the preset conditions are met, the model training is completed, and a trained detection model is obtained. Among them, the preset conditions may be that the loss function converges, the number of iterations reaches a threshold, etc.

[0090] In some embodiments, the training samples at least include sample detection images. The training samples may be obtained based on historical data.

[0091] In some embodiments, the labels may include the actual detection position information of the identifiers corresponding to the training samples. The labels may be obtained through automatic or manual annotation.

[0092] Step 230: Determine the deformation information of the retaining ring at the first rotational speed based on the initial position information and the detected position information.

[0093] The deformation information is data related to the shape change of the retaining ring. For example, the deformation information may include radial deformation information, axial deformation information, etc. Among them, the radial deformation information refers to the expansion or contraction of the retaining ring in the radial direction under the action of centrifugal force. Axial deformation refers to the displacement or deformation of the retaining ring in the axial direction due to frictional stress or other mechanical stresses.

[0094] In some embodiments, the radial deformation information may include an indication of the moving distance in the radial direction, and the axial deformation information may include an indication of the moving distance in the axial direction.

[0095] In some embodiments, based on the calibration parameters of the image acquisition device, the initial position information and the detected position information can be respectively transformed into space through a projection matrix to obtain the initial physical coordinates and the detected physical coordinates. Based on the initial physical coordinates and the detected physical coordinates, the radial deformation information and the axial deformation information of the retaining ring at the first rotational speed are determined.

[0096] In some embodiments of this specification, by comparing the initial position information and the detected position information, the displacement amount of the indication can be accurately measured, thereby evaluating the deformation of the retaining ring; it is possible to measure the deformation of the retaining ring without contacting the retaining ring, avoiding the influence of sensor installation on the operation of the device, and reducing the system cost and installation complexity.

[0097] In some embodiments, determining the deformation information of the retaining ring at the first rotational speed according to the initial position information and the detected position information includes:

[0098] Determine the first displacement information of the indication in the detected image according to the initial position information and the detected position information;

[0099] Determine the second displacement information of the indication in space according to the first displacement information and the preset calibration relationship;

[0100] Determine the deformation information of the retaining ring at the first rotational speed according to the second displacement information.

[0101] The first displacement information reflects the position change of the indication in the image coordinate system. For example, the first displacement information may include the displacement information of the indication in the first direction and the second direction in the image coordinate system.

[0102] Among them, the first direction may be the radial direction, and the second direction is a direction orthogonal to the radial direction.

[0103] In some embodiments, the difference in pixel coordinates between the initial position information and the detected position information may be calculated to obtain the first displacement information in the detected image. For example, if the initial position information is (x0, y0) and the detected position information is (x1, y1), then the first displacement information is (Δx, Δy), where Δx = x1 - x0 and Δy = y1 - y0.

[0104] The second displacement information reflects the position change of the identifier in the space coordinate system. For example, the second displacement information may include the displacement information in the first direction and the displacement information in the second direction of the identifier in the space coordinate system.

[0105] The preset calibration relationship refers to the corresponding relationship or projection relationship between the image coordinate system and the space coordinate system.

[0106] In some embodiments, the preset calibration relationship may be the information of the actual size represented by each pixel point.

[0107] In some embodiments of this specification, by accurately converting the displacement information in the two-dimensional image into the displacement information in space, high-precision deformation measurement is achieved.

[0108] In some embodiments, according to the second displacement information, determining the deformation information of the retaining ring at the first rotational speed includes:

[0109] Obtaining the first distance between the identifier corresponding to the initial position information and the center line of the retaining ring;

[0110] Based on the second displacement information and the first distance, determining the second distance between the identifier and the center line of the retaining ring;

[0111] Based on the difference between the first distance and the second distance, determining the deformation information of the retaining ring in the radial direction as the deformation information of the retaining ring at the first rotational speed.

[0112] The first distance refers to the distance between the identifier and the center line of the retaining ring in the space coordinate system.

[0113] The center line of the retaining ring refers to the geometric central axis of the upper retaining ring at the end of the generator rotor. The center line of the retaining ring may be a virtual line extending along the rotation axis direction of the retaining ring.

[0114] In some embodiments, based on the calibration parameters, the pixel coordinates of the identifier in the initial image may be transformed to the initial position information in space through a projection matrix; in space, based on the space coordinates of the initial position information and the center point of the retaining ring, the first distance may be calculated through a distance formula, such as the Euclidean distance formula, etc.

[0115] The center point of the retaining ring refers to the intersection point of the center line of the retaining ring and the plane where the identifier is located.

[0116] In some embodiments, the first distance can also be obtained by manual measurement.

[0117] In some embodiments, based on the first distance, and the displacement information in the first direction and the displacement information in the second direction in the second displacement information, the distance of the marker relative to the center line of the shielding ring at the detection position can be determined by the Pythagorean theorem.

[0118] In some embodiments of this specification, by efficiently deriving the radial deformation information of the shielding ring in space from the displacement information in the detection image, the deformation of the shielding ring can be monitored regularly to ensure its structural integrity and prevent failures caused by mechanical stress.

[0119] In some embodiments, the first displacement information is used to indicate the number of pixel points between two positions in the detection image, and the preset calibration relationship is determined according to the following steps:

[0120] Obtain a calibration image containing a preset scale;

[0121] Based on the number of pixel points representing the preset scale in the calibration image and the size information of the preset scale, obtain the size information corresponding to a single pixel point in the calibration image;

[0122] Take the size information corresponding to a single pixel point as the preset calibration relationship.

[0123] The first displacement information is used to indicate the pixel point difference between two positions in the detection image. For example, the displacement information in the first direction of the first displacement information may include the number of pixel points in the first direction, and the displacement information in the second direction may include the number of pixel points in the second direction.

[0124] In some embodiments, a standard calibration plate (such as a checkerboard) or a physical scale with known dimensions can be used as the preset scale.

[0125] In some embodiments, before detecting the deformation of the shielding ring, the preset scale can be placed at the position of the marker.

[0126] In some embodiments, an image acquisition device is used to capture calibration images of the preset scale at multiple different angles and positions.

[0127] In some embodiments, if a standard calibration plate (such as a checkerboard) is used, the corner points in the standard calibration plate can be detected by a preset algorithm; if a physical scale is used, the feature points (such as scale lines) on the physical scale can be extracted by manual marking or by an edge detection algorithm.

[0128] In some embodiments, the number of pixels between different corner points or feature points can be calculated: for example, for a physical scale, measure the number of pixels between two scale lines on the physical scale. For example, if there are two scale lines on the physical scale that are 5 millimeters apart and there are 100 pixels between the two scale lines, the size information corresponding to a single pixel is 0.05 mm.

[0129] In some embodiments, if a certain length on the physical scale is L millimeters and this length occupies N pixels in the image, the size information corresponding to a single pixel = L / N.

[0130] In some embodiments, if the size information corresponding to a single pixel is △L, the actual second displacement information can be calculated, including: the displacement information △X = △L * △x in the first direction and the displacement information △Y = △L * △y in the second direction under the spatial coordinate system.

[0131] In some embodiments, as Figure 4 shown, the second distance r1 of the marking point from the center line of the retaining ring at the first rotational speed = [(r + △X) 2 + △Y 2 1 / 2 , and by calculating the difference between r1 and r0, the radial deformation information of the identification of the retaining ring can be obtained, △r = r1 - r0.

[0132] Figure 5 is an exemplary schematic diagram for determining the second displacement shown in some embodiments of this specification.

[0133] In some embodiments, as Figure 5 shown, the first displacement is the distance from Q(x0, y0) to the center line O of the retaining ring, and the second displacement is the distance from Q’(x1, y1) to the center line O of the retaining ring.

[0134] In some embodiments of this specification, by determining the size information corresponding to a single pixel in the calibration image and using it as a preset calibration relationship, it helps to subsequently convert the displacement information in the image into actual displacement information, thereby achieving precise deformation monitoring.

[0135] In some embodiments, the method further includes:

[0136] Determine the correlation relationship between the detection position information and the deformation information at the first rotational speed;

[0137] Based on the detection position information of the retaining ring at the second rotational speed and the correlation relationship, determine the deformation information of the retaining ring at the second rotational speed.

[0138] The second rotational speed refers to the rotational speed at which the deformation needs to be determined currently.

[0139] ​In some embodiments, at multiple different first rotational speeds, multiple measurements are performed on different detection positions of the retaining ring, and the deformation information of each detection position is recorded; based on statistical methods (such as linear regression, polynomial fitting, or other complex models, etc.) or physical models (such as finite element analysis), the relationships among the first rotational speed, the detection position, and the deformation information are analyzed.

[0140] In some embodiments, at the second rotational speed, the detection position information of the retaining ring is determined, and based on the established correlation (such as a model of rotational speed, detection position information, and deformation information), the second rotational speed and the corresponding detection position information are input into the model to predict the corresponding deformation information.

[0141] In some embodiments, the correlation can be the corresponding relationship between the combination of different rotational speeds and detection position information and the associated deformation information.

[0142] In some embodiments of this specification, by establishing a correlation, the deformation information can be quickly predicted at different rotational speeds without the need for detailed measurements each time, which helps to improve the measurement efficiency; it can quickly respond to changes in rotational speed and provide deformation information in real time, and is applicable to scenarios of dynamic monitoring.

[0143] In some embodiments, a detection image of the retaining ring at the first rotational speed is obtained through an image acquisition device, and the method further includes:

[0144] Based on the first rotational speed, the shooting parameters of the image acquisition device are adjusted, and the shooting parameters include at least one of the shooting position and the shooting lens specifications.

[0145] The shooting parameters refer to multiple adjustable parameters that affect the image acquisition effect.

[0146] The shooting position refers to the spatial position of the image acquisition device (such as a camera) relative to the monitored object (such as the identification on the retaining ring). For example, the shooting position can include: the horizontal distance between the camera and the monitored object, the vertical height difference between the camera and the monitored object, the pitch angle, yaw angle, or roll angle of the camera relative to the monitored object, the straight-line distance between the camera and the monitored object, etc.

[0147] The shooting lens specifications can include the optical parameters of the camera lens (such as focal length, aperture size, and resolution, etc.) or different camera lenses.

[0148] In some embodiments, the shooting parameters can further include the frame rate and fill light parameters, etc. Among them, the frame rate refers to the number of images collected by the camera per second, and the fill light parameters refer to the relevant parameters used to adjust the fill light lamp or fill light device during the image acquisition process.

[0149] In some embodiments, the control device may adjust the shooting parameters of the image acquisition device based on the first rotational speed in various ways. For example, the control device may estimate the maximum movement range of the identifier at different first rotational speeds, and by controlling the driving device (such as an electric turntable or a robotic arm) connected to the image acquisition device, adjust the position of the image acquisition device in real time to ensure that the identifier is within the shooting range of the image acquisition device. For example, according to the deformation range of the retaining ring, select an appropriate lens focal length and aperture size. For example, for the maximum movement range of the identifier, by adjusting the focal length or changing different camera lenses, ensure that the identifier is within the shooting range of the image acquisition device.

[0150] The shooting range refers to the spatial range of the scene or object that the image acquisition device can capture.

[0151] In some embodiments of this specification, by adjusting the shooting parameters, ensure that the identifier is within the shooting range of the image acquisition device at different rotational speeds, thereby improving the accuracy of deformation measurement.

[0152] In some embodiments, adjusting the shooting parameters of the image acquisition device based on the first rotational speed includes:

[0153] Based on the first rotational speed, determine the linear velocity of the identifier on the retaining ring;

[0154] Based on the linear velocity of the identifier and the acquisition time interval, determine the movement path of the identifier during the shooting process;

[0155] Based on the movement path of the identifier during the shooting process, adjust the shooting parameters so that the movement path of the identifier during the shooting process is within the shooting range corresponding to the shooting parameters.

[0156] In some embodiments, according to v = rω, the linear velocity of the identifier can be obtained, and based on the linear velocity, determine the movement distance s = Δt·v of the identifier during the shooting process.

[0157] Wherein, v is the linear velocity of the identifier, r is the first distance from the identifier to the center line of the retaining ring, ω is the angular velocity of the rotation of the retaining ring, Δt is the acquisition time interval, and s is the movement distance of the identifier during the shooting process.

[0158] In some embodiments, the movement distances of the identifier during the shooting process at different first rotational speeds can be calculated to determine multiple movement paths of the identifier during the shooting process.

[0159] In some embodiments, to ensure that within the shooting range, the image acquisition device can capture every movement path of the identifier, the control device can adjust the shooting parameters in real time, including the shooting position, lens specifications, etc. For example, when the movement path exceeds the current shooting range of the image acquisition device, the control device can increase the shooting distance of the image acquisition device, such as increasing the distance between the image acquisition device and the end of the protective ring to expand the shooting range, or adjusting the shooting angle to ensure that the movement path of the identifier is within the field of view of the camera. Another example is that the control device can switch to a wide-angle lens to cover a larger movement range.

[0160] In some embodiments, the driving device is mechanically connected to the driving assembly. The driving assembly includes a translation assembly and a rotation assembly, and the driving assembly is configured to control the position of the image acquisition device based on a driving instruction. The driving assembly is communicatively connected to the control device, and the driving assembly receives the driving instruction transmitted by the control device.

[0161] The translation assembly refers to the component used to translate the image acquisition device. For example, the translation assembly can include a slider, a guide rail, or a conveyor belt, etc.

[0162] The rotation assembly refers to the component used to rotate the image acquisition device. For example, the rotation assembly can include a rotating shaft, a motor, or a gyroscope, etc.

[0163] The coordinated action of the driving assembly and the image acquisition device can comprehensively and flexibly detect the identifier, ensuring that the image acquisition device can obtain the required data over the entire movement range of the identifier.

[0164] In some embodiments, the control device can generate a light adjustment instruction and send the light adjustment instruction to the fill light to adjust the light-emitting parameters of the fill light.

[0165] The fill light is configured to provide illumination for the identifier in the detection area based on the light-emitting component. The light-emitting component refers to an electronic device that can emit light. For example, the light-emitting component can be a light source, an optical element, or other light-emitting devices. The detection area refers to a specific area for identifier detection.

[0166] The light adjustment instruction refers to the control parameter used to adjust the light-emitting parameters of the fill light. In some embodiments, the light-emitting parameters can at least include the light intensity, and the light adjustment instruction can at least include an adjustment of the light intensity.

[0167] In some embodiments, the control device may analyze the identified image data of the detection image to obtain the brightness of the detection image. When the brightness of the detection image is greater than the maximum brightness threshold, the light adjustment instruction may be to decrease the light intensity; when the brightness of the detection image is less than the minimum brightness threshold, the light adjustment instruction may be to increase the light intensity. Among them, the adjustment range of the light intensity may be positively correlated with the difference between the brightness and the maximum / minimum brightness threshold. Exemplarily, when the brightness of the detection image is higher than the maximum brightness threshold, the greater the brightness of the detection image, the greater the corresponding adjustment range.

[0168] In some embodiments of this specification, by calculating the linear velocity and movement path of the identifier and adjusting the shooting parameters (such as shooting position, lens specifications, and exposure time) according to this information, it can be ensured that the identifier is always within the shooting range during the shooting process, thereby improving the quality and reliability of image acquisition.

[0169] It should be noted that the above description of the process is only for illustration and explanation, and does not limit the scope of application of this specification. For those skilled in the art, various modifications and changes can be made to the process under the guidance of this specification. However, these modifications and changes are still within the scope of this specification.

[0170] Figure 6 is a schematic structural diagram of a retaining ring deformation recognition device at the rotor end shown in some embodiments of this specification.

[0171] As Figure 6 shown, in one or more embodiments of this specification, a schematic structural diagram of a retaining ring deformation recognition device at the rotor end is also provided. The retaining ring deformation recognition device at the rotor end may include:

[0172] An acquisition module 610, configured to acquire the initial position information corresponding to the identifier when the retaining ring is in a stationary state;

[0173] An identification module 620, configured to acquire a detection image of the retaining ring at a first rotational speed and determine the detection position information corresponding to the identifier in the detection image;

[0174] A determination module 630, configured to determine the deformation information of the retaining ring at the first rotational speed according to the initial position information and the detection position information.

[0175] Among them, the acquisition module 610, the identification module 620, and the determination module 630 may be respectively used to execute the corresponding embodiments of the above-mentioned retaining ring deformation recognition method at the rotor end. For the specific implementation manners of these modules and more detailed content, reference may be made to the corresponding method part, and details will not be repeated here.

[0176] For the specific implementation of each of the above operations, reference may be made to the previous embodiments, and details will not be repeated here.

[0177] Figure 7 It is a schematic structural diagram of an electronic device shown in some embodiments of this specification.

[0178] An embodiment of the present application further provides an electronic device 700, which may include components such as a processor 701 with one or more processing cores, a memory 702 with one or more computer-readable storage media, a power supply 703, and an input unit 704. Those skilled in the art can understand that Figure 7 the electronic device structure shown in does not constitute a limitation on the electronic device, and it may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements. Among them:

[0179] The processor 701 is the center of the identification method for the deformation of the protective ring at the end of the rotor. It uses various interfaces and circuits to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 702, and by calling the data stored in the memory 702, it executes various functions of the electronic device and processes data, thereby monitoring the entire electronic device. It can be understood that the processor 701 transmits signals to the controller. Optionally, the processor 701 may include one or more processing cores; preferably, the processor 701 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 701.

[0180] The memory 702 can be used to store software programs and modules. The processor 701 executes various functional applications and data processing by running the software programs and modules stored in the memory 702. The memory 702 may mainly include a program storage area and a data storage area. Among them, the program storage area may store the operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area may store data created according to the use of the electronic device. In addition, the memory 702 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. Correspondingly, the memory 702 may also include a memory controller to provide the processor 701 with access to the memory 702.

[0181] In some embodiments of the present application, the identification device for the deformation of the protective ring at the end of the rotor can be implemented in the form of a computer program, and the computer program can be in such as Figure 7Run on the electronic device shown. Each program module that constitutes the guard ring deformation recognition device at the rotor end can be stored in the memory of the electronic device. The computer program constituted by each program module enables the processor to execute the steps in the rotor end guard ring deformation recognition method of each embodiment of the present application described in this specification.

[0182] The electronic device includes a processor, a memory, and a network interface connected through a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with external electronic devices through a network connection. When the computer program is executed by the processor, it realizes a rotor end guard ring deformation recognition method.

[0183] The electronic device further includes a power supply 703 for supplying power to each component. Preferably, the power supply 703 can be logically connected to the processor 701 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The power supply 703 may further include any components such as one or more DC or AC power supplies, a recharge system, a power failure detection circuit, a power converter or inverter, and a power status indicator.

[0184] The electronic device may further include an input unit 704, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.

[0185] Although not shown, the electronic device may further include a display unit, etc., which will not be elaborated here. Specifically, in this embodiment, the processor 701 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 702 according to computer instructions, and the processor 701 will run the application programs stored in the memory 702 to realize various functions, such as the rotor end guard ring deformation recognition method of each embodiment of the present application described in this specification.

[0186] Those of ordinary skill in the art can understand that all or part of the steps in the above-mentioned various methods can be completed by instructions, or by controlling relevant hardware through instructions. The instructions can be stored in a computer-readable storage medium and loaded and executed by the processor.

[0187] In specific implementation, each of the above units or structures can be implemented as an independent entity, or can be combined arbitrarily to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, reference can be made to the foregoing method embodiments, which will not be elaborated herein.

[0188] It should be noted that Figure 7 This is only one implementation manner of the electronic device 700 provided by the embodiments of the present application. In practical applications, the electronic device 700 may further include more or fewer components, which are not limited herein.

[0189] It should be understood that the various solutions of the embodiments of the present application can be used in reasonable combination, and the explanations or descriptions of the various terms appearing in the embodiments can be referred to or explained with each other in the various embodiments, which are not limited herein.

[0190] Based on the above embodiments and the same concept, the embodiments of the present application further provide a computer-readable storage medium storing a computer program, and when the computer program runs on a computer, the computer is caused to execute the method provided by the above embodiments.

[0191] Based on the above embodiments and the same concept, the embodiments of the present application further provide a computer program product including a computer program or instruction, and when the computer program or instruction runs on a computer, the computer is caused to execute the method provided by the above embodiments.

[0192] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0193] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0194] The above are only the preferred embodiments of the present application, and do not impose any form of limitation on the present application. Although in the embodiments of the present application, the descriptions of the various embodiments have their own emphases, for the parts not detailed in a certain embodiment, reference can be made to the relevant embodiments of other embodiments. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A method for identifying the deformation of the retaining ring at the rotor end, characterized in that, The retaining ring is installed at the rotor end of the generator, and an identification mark is provided on the retaining ring; the method includes: Obtaining the initial position information corresponding to the identification mark on the retaining ring in a stationary state; Obtaining a detection image of the retaining ring at a first rotational speed, and determining the detection position information corresponding to the identification mark in the detection image; Determining the deformation information of the retaining ring at the first rotational speed according to the initial position information and the detection position information.

2. The method according to claim 1, characterized in that, The determining the deformation information of the retaining ring at the first rotational speed according to the initial position information and the detection position information includes: Determining the first displacement information of the identification mark in the detection image according to the initial position information and the detection position information; Determining the second displacement information of the identification mark in space according to the first displacement information and a preset calibration relationship; Determining the deformation information of the retaining ring at the first rotational speed according to the second displacement information.

3. The method according to claim 2, wherein The determining the deformation information of the retaining ring at the first rotational speed according to the second displacement information includes: Obtaining the first distance between the identification mark corresponding to the initial position information and the center line of the retaining ring; Determining the second distance between the identification mark and the center line of the retaining ring based on the second displacement information and the first distance; Determining the deformation information of the retaining ring in the radial direction based on the difference between the first distance and the second distance as the deformation information of the retaining ring at the first rotational speed.

4. The method according to claim 2, characterized in that The first displacement information is used to indicate the number of pixel points between two positions in the detection image, and the preset calibration relationship is determined according to the following steps: Obtaining a calibration image including a preset scale; Obtaining the size information corresponding to a single pixel point in the calibration image based on the number of pixel points representing the preset scale in the calibration image and the size information of the preset scale; Taking the size information corresponding to the single pixel point as the preset calibration relationship.

5. The method according to claim 1, characterized in that, The method further includes: Determining the correlation relationship between the detection position information and the deformation information at the first rotational speed; Determining the deformation information of the retaining ring at the second rotational speed based on the detection position information and the correlation relationship of the retaining ring at the second rotational speed.

6. The method according to claim 1, characterized in that, Obtaining the detection image of the retaining ring at the first rotational speed through an image acquisition device, the method further includes: Adjusting the shooting parameters of the image acquisition device based on the first rotational speed, where the shooting parameters include at least one of a shooting position and a shooting lens specification.

7. The method according to claim 6, characterized in that, The adjusting the shooting parameters of the image acquisition device based on the first rotational speed includes: Determining the linear velocity of the identification mark on the retaining ring based on the first rotational speed; Determining the movement path of the identification mark during shooting based on the linear velocity of the identification mark and the acquisition time interval; Adjusting the shooting parameters based on the movement path of the identification mark during shooting so that the movement path of the identification mark during shooting is within the shooting range corresponding to the shooting parameters.

8. A device for identifying the deformation of the retaining ring at the rotor end, characterized in that, The device includes: An acquisition module, configured to acquire the initial position information corresponding to the identification mark on the retaining ring in a stationary state; An identification module, configured to obtain a detection image of the retaining ring at a first rotation speed and determine detection position information corresponding to the identification in the detection image; A determination module, configured to determine deformation information of the retaining ring at the first rotation speed according to the initial position information and the detection position information.

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 method for identifying the deformation of the retaining ring at the rotor end according to any one of claims 1 to 7.

10. An electronic device, characterized in that, Comprising: A memory, on which a computer program is stored; A processor, configured to execute the computer program in the memory to implement the method for identifying the deformation of the retaining ring at the rotor end according to any one of claims 1 to 7.

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