Blade disc and blade root flexible measurement method and system based on zoom microtechnique

Abstract

The invention discloses a blade disc and blade root flexible measurement method and system based on a zoom microtechnique. The method comprises the following steps: carrying out multi-feature full-coverage measurement on a whole rotary piece to be measured; based on an image sequence processing algorithm, three-dimensional point cloud acquisition of the whole rotary to-be-measured piece is completed, and three-dimensional data are obtained; and based on the obtained three-dimensional data, constructing a three-dimensional contour model of the blade root by using a triangulation algorithm, and carrying out blade disc blade root contour shape evaluation and comprehensive roughness evaluation. A collaborative robot carries a zoom microscopic sensor to carry out automatic tracking, positioning and measurement, and high-precision and automatic detection of the outline and roughness of the blade root of the blisk is achieved.

Description

Background Art

[0002] The blisk is a core component of an aeroengine. The contour shape and surface roughness of its blade root directly affect the connection strength and service life of the blisk. Traditional blade root detection methods mainly rely on coordinate measuring machines (CMMs) and manual detection tools, which have problems such as low efficiency, insufficient accuracy, and difficulty in adapting to complex shapes. In addition, there is a lack of automated and high-precision measurement solutions for the contour shape and roughness of the blade root in the existing technology.

[0003] In recent years, the combination of collaborative robot technology and optical measurement technology has provided new ideas for the detection of complex curved surface parts. However, in the existing technology, the measurement sensors carried by collaborative robots mostly use fixed focal lengths, which are difficult to meet the high-precision measurement requirements of the complex curved surface of the blade root. At the same time, the lack of an automated evaluation method for the contour shape of the blade root results in the detection efficiency and accuracy being difficult to meet the actual production requirements.

[0004] Therefore, there is an urgent need for an automatic measurement method and system for the contour shape and roughness of the blade root of a blisk based on a collaborative robot carrying a zoom microscopic measurement sensor to achieve efficient and high-precision detection. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a flexible measurement method and system for the blade root of a blisk based on zoom microscopy technology. Through the automatic tracking and positioning measurement carried by a collaborative robot with a zoom microscopic sensor, high-precision and automated detection of the contour and roughness of the blade root of the integral blisk is achieved, so as to solve the technical problems of insufficient measurement accuracy of complex curved surfaces, lack of automated evaluation, and low efficiency of manual detection in traditional blade root detection, and is applicable to the high-precision detection of the blade root of the integral blisk of an aeroengine.

[0006] The present invention adopts the following technical solutions: A flexible measurement method for the blade root of a blisk based on zoom microscopy technology, comprising the following steps: Performing multi-feature full-coverage measurement on the entire rotary workpiece to be measured; Based on an image sequence processing algorithm, obtaining the three-dimensional point cloud of the entire rotary workpiece to be measured to obtain three-dimensional data; Based on the obtained three-dimensional data, using a triangulation algorithm to construct a three-dimensional contour model of the blade root, and performing a comprehensive evaluation of the contour shape and roughness of the blade root of the blisk.

[0007] Preferably, a zoom microscopic measurement sensor is used for multi-feature full-coverage measurement.

[0008] Preferably, the highest resolution of the zoom microscopic measurement sensor is 0.1 μm, and the measurement range is from 0.2 mm to 2 mm.

[0009] Preferably, the three-dimensional point cloud of the entire rotating part to be measured is obtained based on the image sequence processing algorithm to obtain three-dimensional data, as follows: Define a local window , with a window size of 3*3; Calculate the gradient magnitude within the window , and adjust the standard deviation of the Gaussian kernel according to the gradient magnitude ; Apply adaptive Gaussian filtering to obtain the filtered image ; Use the improved gradient energy method to quantify the sharpness of the image by calculating the sum of the squares of the gradient magnitudes in the adjacent regions of the image; Perform Gaussian fitting on the sharpness curve to determine the position of the best focal plane.

[0010] Preferably, the standard deviation is:

[0011] where, is the basic standard deviation, is the adjustment coefficient.

[0012] Preferably, the filtered image :

[0013] where, is the Gaussian kernel function.

[0014] Preferably, the sharpness evaluation function is:

[0015] where, and respectively represent the gradients of the image in the and directions, and respectively represent the neighborhood gradients of the image in the and directions.

[0016] Preferably, according to the comprehensive evaluation result , the surface quality of the rotating part to be measured is classified as follows: Excellent:

[0017] Good:

[0018] Qualified:

[0019] Unqualified:

[0020] Among them, is the threshold value.

[0021] Preferably, let the three-dimensional feature point set be , and the comprehensive evaluation model is:

[0022] Among them, is the weight coefficient, is the three-dimensional average roughness, is the three-dimensional maximum height, is the root mean square error, is the maximum deviation.

[0023] In a second aspect, an embodiment of the present invention provides a flexible measurement system for blade disk and blade root based on zoom microscopy technology, including: A measurement module that performs multi-feature full-coverage measurement on the entire rotating part to be measured; A processing module that obtains the three-dimensional point cloud of the entire rotating part to be measured based on the image sequence processing algorithm to obtain three-dimensional data; An output module that, based on the obtained three-dimensional data, uses the triangulation algorithm to construct a three-dimensional contour model of the blade root, and performs comprehensive evaluation of the contour shape and roughness of the blade disk and blade root.

[0024] In a third aspect, a computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned flexible measurement method for blade disk and blade root based on zoom microscopy technology are implemented.

[0025] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium including a computer program. When the computer program is executed by a processor, the steps of the above-mentioned flexible measurement method for blade disk and blade root based on zoom microscopy technology are implemented.

[0026] In a fifth aspect, a chip includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned flexible measurement method for blade disk and blade root based on zoom microscopy technology are implemented.

[0027] In a sixth aspect, an embodiment of the present invention provides an electronic device including a computer program. When the computer program is executed by the electronic device, the steps of the above-mentioned flexible measurement method for blade disk and blade root based on zoom microscopy technology are implemented.

[0028] Compared with the prior art, the present invention has at least the following beneficial effects: A flexible measurement method for the blade root of a blisk based on zoom microscopy technology combines a collaborative robot with a zoom microscopy sensor, freely drags and moves along the track for detection, realizes high-precision automatic measurement of geometric features such as complex curved surfaces of the blade root, has strong adaptability, improves detection efficiency and consistency at the same time, and reduces manual intervention; through single-shot imaging technology, it realizes the evaluation of the contour shape of the blisk blade root and non-contact measurement of roughness, and further provides an important basis for the comprehensive evaluation of the quality of the blade root. The modular structure of the system is simple and convenient for workers to operate, and is suitable for the actual production and detection requirements of integral blisks of aero-engines.

[0029] Furthermore, a zoom microscopy sensor is introduced to improve the adaptability and resolution to complex curved surfaces of the blade root. Zoom microscopy technology dynamically adjusts the focal length to meet the measurement requirements of different curvature regions (such as blade root grooves and edges). Compared with a fixed focal length sensor, it can avoid the problem of local defocus caused by insufficient depth of field and ensure the capture ability of micron-level surface details (such as scratches and burrs). Combined with the path planning of the collaborative robot, it realizes adaptive follow-up measurement of the curved surface.

[0030] Furthermore, the accuracy index of the sensor is defined to ensure the reliability of the measurement data. A resolution of 0.1μm can identify microscopic roughness features, and a measurement range of 0.2mm to 2mm covers the key areas of the blade root, avoiding the accumulation of segmented measurement errors caused by insufficient measurement range. This parameter design refers to the performance standards of industrial-grade microscopy sensors, taking into account both accuracy and applicability.

[0031] Furthermore, the quality of 3D point cloud reconstruction is optimized through adaptive filtering and sharpness evaluation. The gradient magnitude within the window reflects the complexity of image details. By dynamically adjusting the standard deviation (σ) of the Gaussian kernel, a balance is achieved between smoothing noise and preserving edges. The sum of squared neighborhood gradients is introduced to enhance the sensitivity to minute textures and avoid misjudgment caused by high-frequency noise in the traditional gradient method. Gaussian fitting can eliminate local fluctuations in the sharpness curve and accurately locate the optimal focal plane.

[0032] Furthermore, the filtering intensity of the high-gradient region is dynamically amplified by the coefficient α to suppress noise while avoiding edge blurring. For example, a small σ value is used to protect the surface texture in the low-gradient region of the polished blade root area, while a large σ value is used to denoise the high-gradient region of casting residues; the extended neighborhood gradient calculation is enhanced to respond to periodic textures and avoid detail loss caused by focal plane shift.

[0033] Furthermore, reflects the average surface undulation, Characterizing the maximum peak-valley difference and combining the root mean square error and the maximum deviation can comprehensively evaluate the coupling effect of the profile shape deviation and the surface roughness, dynamically adjust according to process requirements, and achieve personalized configuration of quality evaluation; threshold grading is convenient for rapid sorting on the production site and improves the quality inspection efficiency.

[0034] It can be understood that the beneficial effects of the second to sixth aspects can be referred to the relevant descriptions in the first aspect above, and will not be elaborated here.

[0035] To sum up, the present invention has the advantages of high measurement accuracy, strong adaptability, high efficiency, etc., and is suitable for the actual production and inspection requirements of the integral blisk of aeroengines.

[0036] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Brief Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0038] Figure 1 It is a schematic structural diagram of the system of the present invention; Figure 2 It is the overall flowchart of the blade root measurement of the blisk of the present invention; Figure 3 It is a schematic diagram of a computer device provided by an embodiment of the present invention; Figure 4 It is a block diagram of an electronic device provided by an embodiment of the present invention.

[0039] Among them, 1. Equipment base; 2. Turntable; 3. Collaborative robot; 4. Zoom microscopic measurement sensor; 5. Drag handle; 6. Industrial control computer; 60. Computer device; 61. Processor; 62. Memory; 63. Computer program; 600. Electronic device; 610. Processing unit; 620. Storage unit; 6201. Random access storage unit; 6202. Cache storage unit; 6203. Read-only storage unit; 6204. Program / utilities; 6205. Program module; 630. Bus; 640. Display unit; 650. Input / output interface; 660. Network adapter; 700. External device. Detailed Embodiments

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0042] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0043] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the contextually related objects.

[0044] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present invention to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0045] Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detected (stated condition or event)" or "in response to detecting (stated condition or event)".

[0046] Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. And those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0047] The present invention provides a flexible measurement method for the blade root of a blisk based on zoom microscopy technology, which realizes high-precision and automated detection of the overall contour and roughness of the blisk blade root through automatic tracking and positioning measurement carried by a collaborative robot with a zoom microscopy sensor.

[0048] Embodiment 1 A flexible measurement method for the blade root of a blisk based on zoom microscopy technology according to the present invention includes the following steps: S1. Build a measurement system to achieve high-precision acquisition of images by automatically adjusting the focal length; Please refer to Figure 1 , the measurement system includes a device base 1, a turntable 2, a collaborative robot 3, a zoom microscopy measurement sensor 4, a drag handle 5, and an industrial control computer 6.

[0049] The turntable 2, the collaborative robot 3, and the industrial control computer 6 are respectively arranged on the device base 1. The collaborative robot 3 is connected to the zoom microscopy measurement sensor 4 through the drag handle 5, and the zoom microscopy measurement sensor 4 is arranged above the turntable 2.

[0050] The zoom microscopy measurement sensor 4 can achieve automatic adjustment of the focal length and high-precision acquisition of images. The highest resolution of the zoom microscopy measurement sensor 4 is 0.1 μm, and the measurement range is from 0.2 mm to 2 mm.

[0051] S2. Based on the built measurement system, perform full-coverage measurement of multiple features on the rotating workpiece to be measured; The workpiece to be measured is placed in the center of the turntable 2. The collaborative robot 3 carries the zoom microscopy measurement sensor 4 and uses the drag handle 5 to perform drag measurement along the blade root surface to determine the measurement position. In this system, only the measurement position corresponding to the blade root of a single blade on the blisk needs to be determined, that is, through the rotation of the turntable 2, full-coverage measurement of multiple features of the entire rotating workpiece to be measured is achieved.

[0052] S3. Use adaptive Gaussian filtering to remove image noise while retaining edge information; After the zoom micro - measurement sensor 4 is aligned with the measurement position, it needs to rely on the image sequence processing algorithm to complete the measurement. The image sequence processing algorithm mainly includes image adaptive filtering, sharpness evaluation, and peak fitting. The present invention uses adaptive Gaussian filtering to remove image noise while retaining edge information. Its core idea is to dynamically adjust the standard deviation of the Gaussian kernel according to the gradient of the local image.

[0053] For the image , the filtered image is calculated through the following steps: S301. Define a local window , and the window size is 3 * 3; S302. Calculate the gradient magnitude within the window , and adjust the standard deviation of the Gaussian kernel according to the gradient magnitude ;

[0054]

[0055] where is the basic standard deviation, is the adjustment coefficient.

[0056] S303. Apply adaptive Gaussian filtering to obtain the filtered image ;

[0057] where is the Gaussian kernel function.

[0058] After the image is adaptively filtered, continue to evaluate the sharpness of the image. The present invention uses an improved gradient energy method to quantify the sharpness of the image by calculating the sum of the squares of the gradient magnitudes in the adjacent regions of the image; For the image , define the sharpness evaluation function as:

[0059] where and respectively represent the gradients of the image in the and directions, and respectively represent the neighborhood gradients of the image in the and directions.

[0060] After the sharpness evaluation, it is necessary to perform Gaussian fitting on the sharpness curve to determine the optimal focal plane position.

[0061] Let the clarity curve conform to the Gaussian distribution:

[0062] wherein, is the amplitude, is the peak position (the best focus position), is the standard deviation, is the background noise.

[0063] By fitting the parameters using the least squares method , solve for the parameter values that minimize the error:

[0064] wherein, is the th focus position, is the corresponding clarity value.

[0065] S4. After obtaining the high-precision profile data of the blade root through the above steps, let the three-dimensional feature point set be , and use the triangulation algorithm to construct a three-dimensional profile model of the blade root.

[0066] Develop an adaptive fitting algorithm that automatically selects the least squares method or the spline interpolation method according to the local characteristics of the profile data. Among them, the spline interpolation method is used in the region with large curvature, and the least squares method is used in the smooth region to improve the fitting accuracy and calculate the shape error of the blade root profile; then, use a comprehensive evaluation method based on three-dimensional topography to combine the roughness measurement of the blade root surface with the three-dimensional topography analysis to construct a more comprehensive and accurate surface quality evaluation model. This method not only considers the microscopic roughness of the surface, but also combines the macroscopic three-dimensional shape error, and can more truly reflect the overall quality of the blade root surface. Based on the three-dimensional topography data, calculate the three-dimensional roughness parameters, including: Three-dimensional average roughness : The arithmetic mean of the distances between all points on the surface and the reference plane.

[0067]

[0068] wherein, is the surface area, is the height deviation at point .

[0069] Three-dimensional maximum height : The vertical distance between the highest point and the lowest point on the surface.

[0070]

[0071] Three-dimensional root mean square roughness : The root mean square value of the distances between all points on the surface and the reference plane.

[0072]

[0073] Compare the measured three-dimensional topography data with the design model to calculate the three-dimensional shape error. First, use the Iterative Closest Point (ICP) algorithm to align the measured point cloud with the design model, calculate the shortest distance between each measured point and the surface of the design model, and obtain the deviation value , and calculate the RMSE value and the maximum deviation.

[0074] RMSE (Root Mean Square Error):

[0075] Maximum deviation:

[0076] Combine the three-dimensional roughness parameters and the three-dimensional shape error parameters to construct a comprehensive evaluation model:

[0077] Among them, is the weight coefficient, and the sum is 1.

[0078] The specific value is adjusted according to the importance requirements of the actual inspection of the blade disk root.

[0079] According to the comprehensive evaluation results , divide the root surface quality into different grades, specifically as follows: Excellent:

[0080] Good:

[0081] Qualified:

[0082] Unqualified:

[0083] Among them, is the threshold, which is set according to the qualified rate of the blade disk and the strength criterion in actual manufacturing.

[0084] Preferably, initially set the parameters to 0.3, 0.5, and 0.8 in sequence.

[0085] Those skilled in the art can understand that various aspects of the present invention can be implemented as a system, a method, or a program product. Therefore, various aspects of the present invention can be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation combining hardware and software aspects, which can be collectively referred to as "circuit", "module", or "platform" here.

[0086] Embodiment 2 The present invention provides a flexible measurement system for blade disks and blade roots based on zoom microscopy technology, which can be used to implement the above-mentioned flexible measurement method for blade disks and blade roots based on zoom microscopy technology. Specifically, the flexible measurement system for blade disks and blade roots based on zoom microscopy technology includes a measurement module, a processing module, and an output module.

[0087] Among them, the measurement module performs multi-feature full-coverage measurement on the entire rotating workpiece to be measured; The processing module obtains the three-dimensional point cloud of the entire rotating workpiece to be measured based on the image sequence processing algorithm, and obtains three-dimensional data; The output module constructs a three-dimensional contour model of the blade root based on the obtained three-dimensional data, and conducts a comprehensive evaluation of the contour shape and roughness of the blade disk and blade root.

[0088] Embodiment 3 The present invention provides a terminal device, which includes a processor and a memory. The memory is used to store a computer program, and the computer program includes program instructions. The processor is used to execute the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Graphics Processing Unit (GPU), Tensor Processing Unit (TPU), Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the operation of the flexible measurement method for blade disks and blade roots based on zoom microscopy technology, including: Perform multi-feature full-coverage measurement on the entire rotating part to be measured; obtain the three-dimensional point cloud of the entire rotating part to be measured based on the image sequence processing algorithm to obtain three-dimensional data; based on the obtained three-dimensional data, use the triangulation algorithm to construct the three-dimensional contour model of the blade root, and conduct a comprehensive evaluation of the blade disk blade root contour shape and roughness.

[0089] Please refer to Figure 3 , the terminal device is a computer device. The computer device 60 of this embodiment includes: a processor 61, a memory 62, and a computer program 63 stored in the memory 62 and executable on the processor 61. When the computer program 63 is executed by the processor 61, it implements the method for flexible measurement of blade disk blade roots based on zoom microscopy technology in the embodiment. To avoid repetition, it will not be elaborated here one by one. Alternatively, when the computer program 63 is executed by the processor 61, it implements the functions of each model / unit in the flexible measurement system of blade disk blade roots based on zoom microscopy technology in the embodiment. To avoid repetition, it will not be elaborated here one by one.

[0090] The computer device 60 can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The computer device 60 may include, but is not limited to, a processor 61 and a memory 62. Those skilled in the art can understand that Figure 3 This is only an example of the computer device 60 and does not constitute a limitation on the computer device 60. It may include more or fewer components than shown in the figure, or combine some components, or different components. For example, the computer device may also include input / output devices, network access devices, buses, etc.

[0091] The so-called processor 61 may be a central processing unit (CPU), or may also be other general-purpose processors, a graphics processing unit (GPU), a tensor processing unit (TPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0092] The memory 62 can be an internal storage unit of the computer device 60, such as the hard disk or memory of the computer device 60. The memory 62 can also be an external storage device of the computer device 60, such as a plug-in hard disk equipped on the computer device 60, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc.

[0093] Furthermore, the memory 62 can also include both the internal storage unit of the computer device 60 and the external storage device. The memory 62 is used to store computer programs and other programs and data required by the computer device. The memory 62 can also be used to temporarily store the data that has been output or will be output.

[0094] Please refer to Figure 4 , the terminal device is the electronic device 600, and the electronic device 600 is presented in the form of a general computing device. The components of the electronic device can include but are not limited to: at least one processing unit 610, at least one storage unit 620, a bus 630 connecting different platform components (including the storage unit 620 and the processing unit 610), a display unit 640, etc.

[0095] Among them, the storage unit stores program codes, and the program codes can be executed by the processing unit 610, so that the processing unit 610 executes the steps according to various exemplary embodiments of the present invention described in the above method part of this specification. For example, the processing unit 610 can execute the steps as shown in Figure 2 .

[0096] The storage unit 620 can include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 6201 and / or a cache storage unit 6202, and can further include a read-only storage unit (ROM) 6203.

[0097] The storage unit 620 can also include a program / utility 6204 having a set (at least one) of program modules 6205. Such program modules 6205 include but are not limited to: an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include the implementation of a network environment.

[0098] The bus 630 can represent one or more of several types of bus structures, including a storage unit bus or a storage unit controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any one of the multiple bus structures.

[0099] The electronic device 600 can also communicate with one or more external devices 700 (such as a keyboard, a pointing device, a Bluetooth device, etc.), and can also communicate with one or more devices that enable a user to interact with the electronic device 600, and / or communicate with any device that enables the electronic device 600 to communicate with one or more other computing devices (such as a router, a modem). Such communication can be carried out through the input / output interface 650. Moreover, the electronic device 600 can also communicate with one or more networks (such as a local area network, a wide area network, and / or a public network, such as the Internet) through the network adapter 660. The network adapter 660 can communicate with other modules of the electronic device 600 through the bus 630. It should be understood that although not shown in the figure, other hardware and / or software modules can be used in combination with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, etc.

[0100] Embodiment 4 The present invention also provides a storage medium, specifically a computer-readable storage medium, which is a memory device in a terminal device for storing programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and, of course, the extended storage medium supported by the terminal device. It can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device. The computer-readable storage medium provides a storage space that stores the operating system of the terminal. And, one or more instructions suitable for being loaded and executed by a processor are stored in this storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that more specific examples of the computer-readable storage medium here include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical fiber, a portable compact disk read-only memory, an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0101] The computer-readable storage medium also includes a data signal propagated in a baseband or as part of a carrier wave, which carries the readable program code. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. The readable storage medium can also be any readable medium other than the readable storage medium, and the readable medium can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the readable storage medium can be transmitted using any appropriate medium, including but not limited to wireless, wired, optical fiber cable, radio frequency, etc., or any suitable combination of the foregoing.

[0102] The program code for performing the operations of the present invention can be written in any combination of one or more programming languages. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computing device, partially on the user's device, executed as an independent software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user's computing device through any type of network, including a local area network or a wide area network, or can be connected to an external computing device (for example, by using an Internet service provider to connect through the Internet).

[0103] One or more instructions stored in the computer-readable storage medium can be loaded and executed by a processor to implement the corresponding steps of the method for flexible measurement of the blade root and blade disk based on the zoom microscopy technology in the above embodiments; one or more instructions in the computer-readable storage medium are loaded and executed by the processor to perform the following steps: Perform multi-feature full-coverage measurement on the entire rotating component to be measured; obtain the three-dimensional point cloud of the entire rotating component to be measured based on the image sequence processing algorithm to obtain three-dimensional data; based on the obtained three-dimensional data, use the triangulation algorithm to construct the three-dimensional contour model of the blade root, and conduct a comprehensive evaluation of the blade root and blade disk contour shape and roughness.

[0104] The databases involved in the embodiments provided in the present application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., and is not limited thereto. The processors involved in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., and is not limited thereto.

[0105] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0106] Simulation and experimental data 1. High resolution and adaptive ability of zoom microscopy technology High-precision measurement of complex surfaces is achieved through a zoom microscopy sensor (maximum resolution 0.1 μm, measurement range 0.2 - 2 mm). Experimental data shows that in the surface roughness detection of the blade root groove area, the measurement error of (three-dimensional average roughness) is less than 0.05 μm, and the error of (three-dimensional maximum height) is below 0.1 μm. Compared with traditional fixed-focus sensors (the error is generally above 0.2 μm), the resolution is increased by more than 50%, and the ability to adapt to curvature changes is significantly enhanced.

[0107] 2. Path planning and error compensation of collaborative robots The adaptive sampling strategy based on the simulated annealing algorithm optimizes the measurement path. The simulation results show that in the area with changing blade curvature, when the number of sampling points is reduced by 40%, the root mean square error is reduced from 0.0042 mm of traditional uniform sampling to 0.0034 mm. Through the dynamic error compensation model, the collaborative robot has a positioning accuracy of ±0.02 mm and a repeat positioning accuracy of ±0.01 mm, solving the deviation of the traditional CMM at the 0.05 mm level caused by mechanical vibration.

[0108] 3. Effectiveness of three-dimensional point cloud and comprehensive evaluation model For the three-dimensional contour model constructed by the triangulation algorithm, the maximum deviation is controlled within 0.1 mm, and the root mean square error is less than 0.03 mm. Combined with the comprehensive evaluation model, the pass rate of the blade root contour shape is increased from 85% judged manually to 98%.

[0109] 4. Full-automatic detection efficiency of complex surfaces Combined with adaptive Gaussian filtering (dynamic adjustment of standard deviation σ) and gradient energy method, the image processing speed is increased by 50%. Taking a certain fan engine blisk as an example, the single blade detection time is shortened from 10 minutes (manual) to 2 minutes, and there is no fatigue error during 24-hour continuous operation.

[0110]

[0111] In summary, a flexible measurement method and system for blisk blade roots based on zoom microscopy technology according to the present invention solves the problems in traditional detection such as poor adaptability of fixed focal length, low manual efficiency, and single evaluation dimension through zoom microscopy technology, adaptive image processing, and three-dimensional comprehensive evaluation model, adapts to complex surface topographies, eliminates measurement blind spots, combines gradient-driven adaptive filtering and multi-dimensional sharpness evaluation to improve the accuracy of three-dimensional data, integrates profile and roughness parameters, and supports process optimization and quality traceability. It conforms to the development trend of high-precision and full-information detection of aeroengine blisks.

[0112] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is used as an example. In practical applications, the above-mentioned functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0113] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present invention can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0115] In the embodiments provided by the present invention, it should be understood that the disclosed device / terminal and method can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0116] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0117] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0118] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-mentioned embodiment methods of the present invention, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0119] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses, and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in one block or multiple blocks.

[0120] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implement the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in one block or multiple blocks.

[0121] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in one block or multiple blocks.

[0122] The above content is only to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A flexible measurement method for the blade disk and blade root based on zoom microscopy technology, characterized in that It includes the following steps: Perform multi-feature full-coverage measurement on the entire rotating part to be measured; Based on the image sequence processing algorithm, obtain the three-dimensional point cloud of the entire rotating part to be measured and get three-dimensional data; Based on the obtained three-dimensional data, use the triangulation algorithm to construct the three-dimensional contour model of the blade root, and conduct a comprehensive evaluation of the blade disk blade root contour shape and roughness.

2. The flexible measurement method for the blade disk and blade root based on the zoom microscopy technology according to claim 1, wherein Use a zoom microscopic measurement sensor to perform multi-feature full-coverage measurement.

3. The flexible measurement method for the blade disk and blade root based on the zoom microscopy technique according to claim 2, wherein The highest resolution of the zoom microscopic measurement sensor is 0.1μm, and the measurement range is from 0.2mm to 2mm.

4. The flexible measurement method of blade disk and blade root based on zoom microscopy according to claim 1, wherein Based on the image sequence processing algorithm, obtain the three-dimensional point cloud of the entire rotating part to be measured and get three-dimensional data, specifically as follows: Define a local window , with a window size of 3*3; Calculate the gradient magnitude within the calculation window , and adjust the standard deviation of the Gaussian kernel according to the gradient magnitude ; Apply adaptive Gaussian filtering to obtain the filtered image ; Use the improved gradient energy method to quantify the clarity of the image by calculating the sum of the squares of the gradient amplitudes in the adjacent fields of the image; Perform Gaussian fitting on the clarity curve to determine the position of the best focal plane.

5. The method for measuring the flexibility of the blade disc and blade root based on the zoom microscopy technology according to claim 4, wherein Standard deviation is as follows: Among them, is the basic standard deviation, is the adjustment coefficient.

6. The flexible measurement method for the blade disk and blade root based on the zoom microscopy technology according to claim 4, wherein Filtered image : Among them, is the Gaussian kernel function.

7. The method for measuring the flexibility of the blade disk and blade root based on the zoom microscopy technology according to claim 4, wherein Clarity evaluation function is as follows: Among them, and respectively represent the gradients of the image in the and directions, and respectively represent the neighborhood gradients of the image in the and directions.

8. The flexible measurement method for the blade disk and blade root based on the zoom microscopy technology according to claim 1, wherein According to the comprehensive evaluation results , the surface quality of the rotating part to be measured is classified as follows: Excellent: Good: Qualified: Unqualified: Among them, is the threshold value.

9. The method for measuring the flexibility of the blade disk and blade root based on the zoom microscopy technique according to claim 8, wherein Let the three-dimensional feature point set be , and the comprehensive evaluation model is: Among them, is the weight coefficient, is the three-dimensional average roughness, is the three-dimensional maximum height, is the root mean square error, is the maximum deviation.

10. A flexible measurement system for blade disks and blade roots based on zoom microscopy technology, characterized in that, It includes: A measurement module that performs multi-feature full-coverage measurement on the entire rotating part to be measured; A processing module that, based on the image sequence processing algorithm, obtains the three-dimensional point cloud of the entire rotating part to be measured and gets three-dimensional data; An output module that, based on the obtained three-dimensional data, uses the triangulation algorithm to construct the three-dimensional contour model of the blade root and conducts a comprehensive evaluation of the blade disk blade root contour shape and roughness.

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