Method and system for measuring structural thermal and vibrational deformation by identifying sub-regions of a panoramic region feedback

Abstract

The present application belongs to the technical field of structural thermal and vibration deformation measurement, and discloses a structural thermal and vibration deformation measurement method and system involving sub-region identification and panoramic region feedback. The present application sets up a test environment and sets physical marker points, so that high-precision real-time dynamic structural thermal and vibration deformation measurement of a deformation measurement device can be completed, the error in the overall test process is reduced, the overall measurement accuracy of the system is improved, the measurement and calculation efficiency is improved, the waiting time is shortened, the overall operation efficiency of the system is improved, the test cost is reduced, and the labor burden of relevant staff is reduced. The present application can realize automatic identification and matching of target points and coded points, and the matching relationship of other ordinary marker points can be determined only through image plane coordinate information, so that the automation degree of the measurement process is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of structural thermal and vibration deformation measurement technology, specifically involving a method and system for measuring structural thermal and vibration deformation with regional identification and panoramic feedback. Background Technology

[0002] Aviation is a crucial industrial sector at the national level, playing a pivotal role in national influence and people's daily lives. Within the aviation industry, the research and production of complete aircraft and their components are paramount. Airfoil deformation measurement can not only effectively accelerate the research and development process of related products but also significantly reduce their costs. It provides effective data support for theoretical research on airfoil deformation, laying a solid foundation for subsequent practical production. Therefore, airfoil deformation measurement and structural thermal measurement are of great significance.

[0003] However, common measurement methods can only perform static measurements and involve complex scenario setups, resulting in high testing costs and inconvenience during operation. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a method and system for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback, comprising the following steps:

[0007] The installation positions of the pre-set structural thermal measurement devices on the structural components of the simulated equipment are arranged. Fixed hinges and movable hinges for structural thermal testing are arranged at the pre-set installation positions. Displacement sensors and fiber optic strain sensors are installed on the movable hinges for structural thermal testing as target points.

[0008] The three-dimensional coordinates of each target point on the movable hinge used for structural thermal testing are obtained, and the changes in the three-dimensional coordinates when the movable hinge moves are collected to form the three-dimensional displacement of each target point.

[0009] Based on the center wavelength drift of the fiber optic strain sensor, the problem of measuring structural heat feedback from the panoramic region is decoupled into a temperature change model and a strain change model.

[0010] Physical markers were affixed to key parts of the regional identification panoramic feedback device to measure vibration deformation.

[0011] Capture images of key areas, obtain the three-dimensional displacement of each target point, obtain the coordinates of the target point, and form a digital model of the panoramic area feedback device based on the coordinates.

[0012] The physical markers of key parts of the panoramic area feedback device are bound to the measurements of the corresponding positions of the digital model of the panoramic area feedback device for sub-regional recognition, forming physical marker binding information;

[0013] The digital model of the panoramic area feedback device for regional identification, the coordinates of physical marker points, and the binding information of physical marker points are input into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and the coordinates of all measured vertices of the digital model of the panoramic area feedback device for regional identification are output.

[0014] Based on the coordinates of all the measurement vertices and the initial coordinates of the measurement vertices in the digital model of the regional identification panoramic feedback device, the deformation measurement of the regional identification panoramic feedback device is calculated to obtain the deformation data of the regional identification panoramic feedback device, which serves as the strain change model.

[0015] Based on the temperature change model and the strain change model, the structural thermal and vibration deformations are obtained by identifying the panoramic region feedback in different areas.

[0016] A further improvement of this invention lies in the following method for calculating the center wavelength drift of the fiber optic strain sensor:

[0017] Δλ1=K T1 ΔT+K ε1 Δε

[0018] Where ΔT is the temperature data acquired by the fiber Bragg grating strain sensor, Δε is the strain data acquired by the fiber Bragg grating strain sensor, and K ε1 K is the strain sensitivity coefficient of the fiber optic strain sensor. T1 Temperature sensitivity coefficient of fiber optic strain sensor.

[0019] A further improvement of this invention is that the temperature change model has the following characteristics:

[0020] q 试件吸收 =(q 测量 / K 位置系数 )-q 损失

[0021] Where, q 测量 K represents the actual measured heat flow. 位置系数 q is the height coefficient. 试件吸收 q represents the actual heat flux absorbed by the test specimen. 损失 This is due to heat loss.

[0022] A further improvement of this invention lies in capturing images of key parts and obtaining the three-dimensional displacement of each target point. The specific method for obtaining the coordinates of the target point positions is as follows:

[0023] The point cloud of the target location after coarse deformation measurement registration and the point cloud of the digital model are iteratively calculated in the neighborhood to obtain the optimal rigid body transformation method, so that the mapping distance between the target location point cloud and the digital model point cloud is the shortest.

[0024] When measuring the point cloud data of the target position surface, determine the positions of some points in the target position surface point cloud, and then determine the positions of the remaining points in sequence.

[0025] A further improvement of this invention lies in the step of binding physical marker points of key parts of the panoramic area feedback device with measurements of corresponding positions in the digital model of the regional recognition panoramic area feedback device to form physical marker point binding information, specifically including:

[0026] Specify the absolute position of at least one feature point on the grid as a constraint in the grid coordinate reconstruction process;

[0027] Convert the Laplace coordinates to Cartesian coordinates to complete the grid coordinate reconstruction;

[0028] If the absolute position of the specified feature point after reconstruction changes compared to before coordinate reconstruction, the changes in the feature point position before and after reconstruction are fitted to form a correspondence between physical marker points and network coordinates.

[0029] Based on the correspondence between physical markers and network coordinates, the physical markers of key parts of the panoramic area feedback device are bound to the measurements of the corresponding positions of the digital model of the panoramic area feedback device for regional identification, thus forming physical marker binding information.

[0030] A further improvement of this invention is that, after obtaining the structural thermal and vibration deformation feedback of the panoramic region for regional identification, the data is stored in a cloud platform.

[0031] A further improvement of this invention is that the cloud platform adopts cloud computing platform and cloud storage technology. The cloud computing platform and cloud storage technology divide the data storage architecture into three layers, among which the distributed big data storage layer is the core. It collects data in the ship control system included in the application layer, uses the MapReduce distributed parallel model to realize the data partitioning, and uses a safe fault-tolerant storage algorithm to evenly divide the data to be stored into the corresponding hardware layer computing server nodes, thereby completing the effective storage of data.

[0032] Secondly, the present invention provides a structural thermal and vibration deformation measurement system with regional identification and panoramic region feedback, comprising:

[0033] The target location acquisition membrane is used to simulate the installation position of the structural thermal measurement device on the relevant equipment structure. Fixed hinges and movable hinges for structural thermal testing are arranged at the preset installation position. Displacement sensors and fiber optic strain sensors are installed on the movable hinges for structural thermal testing as the target location.

[0034] The three-dimensional displacement acquisition module is used to acquire the three-dimensional coordinates of each target point on the movable hinge used for structural thermal testing, collect the changes in the three-dimensional coordinates when the movable hinge moves, and form the three-dimensional displacement of each target point.

[0035] The decoupling module is used to decouple the measurement problem of structural heat feedback from the panoramic region into a temperature change model and a strain change model based on the center wavelength drift of the fiber optic strain sensor.

[0036] The vibration deformation measurement and acquisition module is used to attach physical markers to key parts of the regional identification panoramic feedback device to perform vibration deformation measurement of the regional identification panoramic feedback.

[0037] The digital model acquisition module is used to capture images of key parts, obtain the three-dimensional displacement of each target point, obtain the coordinates of the target point, and form a digital model of the panoramic area feedback device based on the coordinates.

[0038] The binding information acquisition module is used to bind the physical marker points of key parts of the panoramic area feedback device with the measurements of the corresponding positions of the digital model of the panoramic area feedback device for regional identification, thus forming physical marker point binding information;

[0039] The coordinate difference module is used to input the digital model of the regional identification panoramic area feedback device, the coordinates of physical marker points, and the binding information of physical marker points into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and outputs the coordinates of all measured vertices of the digital model of the regional identification panoramic area feedback device.

[0040] The strain change model acquisition module is used to calculate the deformation measurement of the regional identification panoramic feedback device based on the coordinates of all measurement vertices and the initial coordinates of the measurement vertices of the digital model of the regional identification panoramic feedback device, and obtain the deformation data of the regional identification panoramic feedback device as the strain change model.

[0041] The combined module is used to obtain the structural thermal and vibration deformation of the panoramic region based on the temperature change model and the strain change model.

[0042] Thirdly, the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of a method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback.

[0043] Fourthly, the present invention provides a storage medium storing a computer program thereon, wherein when the computer program is executed by a processor, the steps of a method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback are implemented.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] This invention enables high-precision real-time dynamic structural thermal and vibration deformation measurement through test environment setup and physical marker point setting. This reduces errors in the overall testing process, thereby improving the overall measurement accuracy of the system, increasing calculation efficiency, shortening waiting time, enhancing overall system efficiency, reducing testing costs, and alleviating the workload of relevant personnel. This invention can automatically identify and match target points and coded points, and can determine the matching relationship of other ordinary marker points using only image plane coordinate information, greatly improving the automation of the measurement process. Furthermore, in the process of identifying and testing structural thermal data from panoramic area feedback, the heat flux measured by the heat flux meter and the heat flux absorbed by the test specimen surface are often unequal. Based on practical application, this invention corrects the heat flux measured by the heat flux meter, ensuring that the heat energy absorbed by the specimen surface is calculated and analyzed, thus improving the accuracy of the entire measurement method and reducing errors. Attached Figure Description

[0046] Figure 1 This is a flowchart of the present invention;

[0047] Figure 2 This is a system diagram of the present invention;

[0048] Figure 3 This is a flowchart of Example 1;

[0049] Figure 4 This is a system diagram of Example 2. Detailed Implementation

[0050] To further understand the content of this invention, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0051] See Figure 1 The method for measuring structural thermal and vibration deformation by regional identification and panoramic feedback includes the following steps:

[0052] S1, simulate the preset installation position of the structural thermal measurement device on the relevant equipment structural components, arrange the fixed hinge and movable hinge for structural thermal testing at the preset installation position, and install the displacement sensor and fiber optic strain sensor on the movable hinge for structural thermal testing as the target point position.

[0053] S2, acquire the three-dimensional coordinates of each target point on the movable hinge used for structural thermal testing, collect the changes in the three-dimensional coordinates when the movable hinge moves, and form the three-dimensional displacement of each target point.

[0054] S3, based on the center wavelength drift of the fiber optic strain sensor, decouples the problem of structural heat measurement for regional identification of panoramic area feedback into a temperature change model and a strain change model.

[0055] S4. Physical markers are affixed to key parts of the regional identification panoramic feedback device to measure vibration deformation.

[0056] S5 captures images of key areas, obtains the three-dimensional displacement of each target point, acquires the coordinates of the target point, and forms a digital model of the panoramic area feedback device based on the coordinates.

[0057] S5 binds the physical markers of key parts of the panoramic area feedback device with the measurements of the corresponding positions of the digital model of the panoramic area feedback device for regional identification, forming physical marker binding information.

[0058] S7 inputs the digital model of the panoramic area feedback device for regional identification, the coordinates of physical marker points, and the binding information of physical marker points into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and outputs the coordinates of all measured vertices of the digital model of the panoramic area feedback device for regional identification.

[0059] S8. Based on the coordinates of all the measurement vertices and the initial coordinates of the measurement vertices in the digital model of the regional identification panoramic feedback device, calculate the deformation measurement of the regional identification panoramic feedback device to obtain the deformation data of the regional identification panoramic feedback device, which serves as the strain change model.

[0060] S9, based on the temperature change model and the strain change model, obtains the structural thermal and vibration deformation of the panoramic region feedback for regional identification.

[0061] See Figure 2 A structural thermal and vibration deformation measurement system with regional identification and panoramic feedback, including:

[0062] The target location acquisition membrane is used to simulate the installation position of the structural thermal measurement device on the relevant equipment structure. Fixed hinges and movable hinges for structural thermal testing are arranged at the preset installation position. Displacement sensors and fiber optic strain sensors are installed on the movable hinges for structural thermal testing as the target location.

[0063] The three-dimensional displacement acquisition module is used to acquire the three-dimensional coordinates of each target point on the movable hinge used for structural thermal testing, collect the changes in the three-dimensional coordinates when the movable hinge moves, and form the three-dimensional displacement of each target point.

[0064] The decoupling module is used to decouple the measurement problem of structural heat feedback from the panoramic region into a temperature change model and a strain change model based on the center wavelength drift of the fiber optic strain sensor.

[0065] The vibration deformation measurement and acquisition module is used to attach physical markers to key parts of the regional identification panoramic feedback device to perform vibration deformation measurement of the regional identification panoramic feedback.

[0066] The digital model acquisition module is used to capture images of key parts, obtain the three-dimensional displacement of each target point, obtain the coordinates of the target point, and form a digital model of the panoramic area feedback device based on the coordinates.

[0067] The binding information acquisition module is used to bind the physical marker points of key parts of the panoramic area feedback device with the measurements of the corresponding positions of the digital model of the panoramic area feedback device for regional identification, thus forming physical marker point binding information;

[0068] The coordinate difference module is used to input the digital model of the regional identification panoramic area feedback device, the coordinates of physical marker points, and the binding information of physical marker points into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and outputs the coordinates of all measured vertices of the digital model of the regional identification panoramic area feedback device.

[0069] The strain change model acquisition module is used to calculate the deformation measurement of the regional identification panoramic feedback device based on the coordinates of all measurement vertices and the initial coordinates of the measurement vertices of the digital model of the regional identification panoramic feedback device, and obtain the deformation data of the regional identification panoramic feedback device as the strain change model.

[0070] The combined module is used to obtain the structural thermal and vibration deformation of the panoramic region based on the temperature change model and the strain change model.

[0071] Example 1:

[0072] This invention includes the following steps:

[0073] S1: First, perform structural thermal measurement and analysis calculations. Simulate the installation position of the pre-set structural thermal measurement device on the relevant equipment structural components, arrange and install the fixed hinge and movable hinge for structural thermal testing, and install the displacement sensor on the movable hinge for structural thermal testing. Fix the position of the displacement sensor through the pre-tightening hole on the displacement sensor fixture.

[0074] S2: Structural thermal measurement with panoramic feedback of regional identification through digital camera measurement system. When there are two or more camera centers in the space, four or more observation equations can be formed according to the imaging equation. The image camera position and image camera angle are known. Combined with the position of image point p, the spatial position of object point P can be obtained through bundle adjustment.

[0075] S3: The problem of temperature influence on fiber Bragg gratings during strain measurement is solved by using a method of cross-bonding dual gratings. The two fiber Bragg gratings have the same sensitivity for strain and temperature measurement and are arranged at a certain angle θ (0°≤θ≤90°).

[0076] S4: When θ is 90°, i.e., the dual fiber gratings are arranged vertically, the sensitivity coefficient Kε(1-cosθ) is at its maximum, which is Kε. At this time, the sensing system has the highest strain sensitivity. The temperature compensation equation under this condition is:

[0077] Δλ1-Δλ2=K ε Thus, within a certain temperature and strain range, as long as the center wavelength shift Δλ1 and Δλ2 of the fiber grating are obtained, the decoupling of temperature and strain can be achieved, enabling high-precision measurement of structural heat with regional identification and panoramic feedback.

[0078] S5: Perform vibration deformation measurement for regional identification and panoramic feedback. During the measurement, first set up and install multiple high-precision motion capture infrared cameras in the measurement area, initialize and debug the matching motion capture software, and paste physical markers on key parts of the regional identification and panoramic feedback device.

[0079] S6: Use a motion capture camera to take pictures and videos and use the accompanying software to process the camera data to obtain the coordinates of the physical marker points;

[0080] S7: Bind the physical marker points to the corresponding measured vertices of the digital model of the sub-regional recognition panoramic area feedback device;

[0081] S8: Input the digital model of the panoramic area feedback device for regional identification, the coordinates of physical marker points, and the binding information of physical marker points into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and output the coordinates of all vertices for measurement of the digital model of the panoramic area feedback device for regional identification.

[0082] S9: Based on this data and the initial coordinates of all the vertices of the digital model of the regional identification panoramic feedback device, perform deformation measurement calculations of the regional identification panoramic feedback device and output the deformation data of the regional identification panoramic feedback device.

[0083] S10: Save the structural thermal measurement data and vibration deformation measurement data obtained in step S4 by identifying the panoramic area and feeding back the data. Save the data to the cloud platform, and then the entire process of structural thermal and vibration deformation measurement by identifying the panoramic area and feeding back the data can be completed.

[0084] In step S1, during structural thermal testing, the principle of the structural thermal testing method combining digital photography and fiber optic gratings for regional identification and panoramic feedback is as follows: a high-precision digital photogrammetry system is used to monitor the three-dimensional coordinate changes of each target point position in the optomechanical structure, and then the three-dimensional displacement of each target point position is fed back; strain and temperature sensors are deployed on the surface of the optomechanical structure using a fiber optic grating layout method with thermal decoupling function, and the strain field and temperature field are measured and decoupled with high precision through a structural thermal model algorithm for regional identification and panoramic feedback; through the fusion processing of structural thermal data from regional identification and panoramic feedback, the displacement field, strain field, and temperature field of the optomechanical structure are measured simultaneously.

[0085] In step S2, the digital photogrammetry system comprises three parts: an imaging system, measurement accessories, and measurement software. The key to digital photogrammetry technology is the image data processing algorithm.

[0086] In step S3, during the structural thermal measurement process, when the temperature and strain of the fiber grating change by ΔT and Δε respectively, the center wavelength shift of fiber grating 1 is: Δλ1=K T1 ΔT+K ε1 Δε, where: the strain sensitivity coefficient of fiber grating 1 is represented by K. ε1 The temperature sensitivity coefficient is represented by K. T1 express.

[0087] In step S4, during the structural simulation thermal test, the heat flux measured by the heat flux meter and the heat flux absorbed by the surface of the test piece are usually not equal. A correction needs to be made to the heat flux measured by the heat flux meter according to the actual usage conditions to obtain the heat energy absorbed by the test piece surface. The correction formula is:

[0088] q 试件吸收 =(q 测量 / K 位置系数 )-q 损失 In the formula, q 测量 The actual heat flux measured by the heat flux meter; K position coefficient is the height coefficient. When the heat flux meter is installed using the embedded method in the experiment, K position coefficient = 1; q试件吸收 The actual heat flux absorbed by the test specimen; q 损失 This is due to heat loss.

[0089] In step S5, six Optitrack Prime41 infrared tracking cameras are used with Optitrack's dedicated camera data processing software. The fastest capture speed is 180 frames per second, and the capture accuracy is 0.1mm. The system runs on Windows 10 Professional operating system, i5-12600K CPU, and 16GB of memory. This test environment is consistent with the general application scenarios in this field.

[0090] In step S6, fine deformation measurement and registration of the point cloud is required. The method for fine deformation measurement and registration of the point cloud is the nearest neighbor iteration algorithm, i.e., the ICP algorithm. Its principle is to iteratively calculate the workpiece point cloud and the digital model point cloud after coarse deformation measurement and registration within the neighborhood to obtain the optimal rigid body transformation method, so that the mapping distance between the workpiece point cloud and the digital model point cloud is minimized. When measuring the workpiece surface point cloud data, since the scanning method is continuous scanning along a certain direction, there is a strict sequential relationship between the data points. Only a portion of the point cloud positions need to be determined, and the positions of the remaining points can be determined sequentially.

[0091] In step S7, after converting the coordinates of the mesh vertices from Cartesian coordinates to Laplace coordinates using the Laplace operator, mesh reconstruction is required, which involves converting the Laplace coordinates back to Cartesian coordinates. Before mesh reconstruction, the user needs to specify the absolute position of at least one feature point on the mesh as a constraint during the mesh reconstruction process. If the absolute position of the specified feature point changes compared to before the coordinate transformation, the solution result will be the mesh deformed state based on the change in the specified feature point's position. In other words, specifying the feature point is both a necessary operation for mesh deformation and a necessary condition for mesh reconstruction.

[0092] In step S9, after performing the deformation measurement calculation of the panoramic area feedback device for regional identification, the motion capture data needs to be recorded and processed. Two representative sets of data are selected, and their accuracy is verified using the LMD algorithm and the inverse distance weighting (IDW) algorithm, respectively. The steps are as follows: Select a representative portion of the motion capture physical markers as the validation set, and interpolate the validation set using the coordinates of other physical markers; then verify the interpolation results against the actual measurement results.

[0093] In step S10, cloud computing platforms and cloud storage technologies are used to divide the data storage architecture into three layers, with the distributed big data storage layer being the core. This layer collects data from the ship control system within the application layer, uses the MapReduce distributed parallel model to partition the data, and employs a secure fault-tolerant storage algorithm to evenly distribute the data to be stored across the corresponding computing server nodes in the hardware layer, thereby achieving effective data storage. Furthermore, the designed big data storage architecture for ship control systems under a cloud computing environment effectively meets the requirements for efficient and secure storage of big data.

[0094] Example 2:

[0095] Please see Figure 3 As shown, the present invention also provides an electronic device 100 for measuring structural thermal and vibration deformation using a method for regional identification and panoramic regional feedback; the electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on the at least one processor 102, and at least one communication bus 104.

[0096] The memory 101 can be used to store the computer program 103. The processor 102 implements the steps of the structural thermal and vibration deformation measurement method described in Embodiment 1 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101. The memory 101 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device 100 (such as audio data), etc. In addition, the memory 101 may include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0097] The at least one processor 102 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 102 may be a microprocessor or any conventional processor. The processor 102 is the control center of the electronic device 100, connecting various parts of the electronic device 100 via various interfaces and lines.

[0098] The memory 101 in the electronic device 100 stores multiple instructions to implement a structural thermal and vibration deformation measurement method with regional identification and panoramic feedback. The processor 102 can execute the multiple instructions to achieve the following:

[0099] The installation positions of the pre-set structural thermal measurement devices on the structural components of the simulated equipment are arranged. Fixed hinges and movable hinges for structural thermal testing are arranged at the pre-set installation positions. Displacement sensors and fiber optic strain sensors are installed on the movable hinges for structural thermal testing as target points.

[0100] The three-dimensional coordinates of each target point on the movable hinge used for structural thermal testing are obtained, and the changes in the three-dimensional coordinates when the movable hinge moves are collected to form the three-dimensional displacement of each target point.

[0101] Based on the center wavelength drift of the fiber optic strain sensor, the problem of measuring structural heat feedback from the panoramic region is decoupled into a temperature change model and a strain change model.

[0102] Physical markers were affixed to key parts of the regional identification panoramic feedback device to measure vibration deformation.

[0103] Capture images of key areas, obtain the three-dimensional displacement of each target point, obtain the coordinates of the target point, and form a digital model of the panoramic area feedback device based on the coordinates.

[0104] The physical markers of key parts of the panoramic area feedback device are bound to the measurements of the corresponding positions of the digital model of the panoramic area feedback device for sub-regional recognition, forming physical marker binding information;

[0105] The digital model of the panoramic area feedback device for regional identification, the coordinates of physical marker points, and the binding information of physical marker points are input into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and the coordinates of all measured vertices of the digital model of the panoramic area feedback device for regional identification are output.

[0106] Based on the coordinates of all the measurement vertices and the initial coordinates of the measurement vertices in the digital model of the regional identification panoramic feedback device, the deformation measurement of the regional identification panoramic feedback device is calculated to obtain the deformation data of the regional identification panoramic feedback device, which serves as the strain change model.

[0107] Based on the temperature change model and the strain change model, the structural thermal and vibration deformations are obtained by identifying the panoramic region feedback in different areas.

[0108] Example 3:

[0109] If the modules / units integrated in the electronic device 100 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0110] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0111] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0112] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0113] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for measuring structural thermal and vibration deformation with panoramic region feedback and regional identification, characterized in that, Includes the following steps: The installation positions of the pre-set structural thermal measurement devices on the structural components of the simulated equipment are arranged. Fixed hinges and movable hinges for structural thermal testing are arranged at the pre-set installation positions. Displacement sensors and fiber optic strain sensors are installed on the movable hinges for structural thermal testing as target points. The three-dimensional coordinates of each target point on the movable hinge used for structural thermal testing are obtained, and the changes in the three-dimensional coordinates during the movement of the movable hinge are collected to form the three-dimensional displacement of each target point. Based on the center wavelength drift of the fiber optic strain sensor, the problem of measuring structural heat feedback from the panoramic region is decoupled into a temperature change model and a strain change model. Physical markers were affixed to key parts of the regional identification panoramic feedback device to measure vibration deformation. Capture images of key areas, obtain the three-dimensional displacement of each target point, obtain the coordinates of the target point, and form a digital model of the panoramic area feedback device based on the coordinates. The physical markers of key parts of the panoramic area feedback device are bound to the measurements of the corresponding positions of the digital model of the panoramic area feedback device for sub-regional recognition, forming physical marker binding information; The digital model of the panoramic area feedback device for regional identification, the coordinates of physical marker points, and the binding information of physical marker points are input into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and the coordinates of all measured vertices of the digital model of the panoramic area feedback device for regional identification are output. Based on the coordinates of all the measurement vertices and the initial coordinates of the measurement vertices in the digital model of the regional identification panoramic feedback device, the deformation measurement of the regional identification panoramic feedback device is calculated to obtain the deformation data of the regional identification panoramic feedback device, which serves as the strain change model. Based on the temperature change model and the strain change model, the structural thermal and vibration deformations are obtained by identifying the panoramic region feedback in different areas.

2. The method for measuring structural thermal and vibration deformation by regional identification and panoramic feedback according to claim 1, characterized in that, The method for calculating the center wavelength drift of a fiber optic strain sensor is as follows: Δλ1=K T1 ΔT+K ε1 No Where ΔT is the temperature data acquired by the fiber Bragg grating strain sensor, Δε is the strain data acquired by the fiber Bragg grating strain sensor, and K ε1 K is the strain sensitivity coefficient of the fiber optic strain sensor. T1 Temperature sensitivity coefficient of fiber optic strain sensor.

3. The method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback according to claim 1, characterized in that, The temperature change model has the following characteristics: q 试件吸收 =(q 测量 / K 位置系数 )-q 损失 Where, q 测量 K represents the actual measured heat flow. 位置系数 q is the height coefficient. 试件吸收 q represents the actual heat flux absorbed by the test specimen. 损失 This is due to heat loss.

4. The method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback according to claim 1, characterized in that, The specific method for capturing images of key areas and obtaining the 3D displacement of each target point to obtain its coordinates is as follows: The point cloud of the target location after coarse deformation measurement registration and the point cloud of the digital model are iteratively calculated in the neighborhood to obtain the optimal rigid body transformation method, so that the mapping distance between the target location point cloud and the digital model point cloud is the shortest. When measuring the point cloud data of the target position surface, determine the positions of some points in the target position surface point cloud, and then determine the positions of the remaining points in sequence.

5. The method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback according to claim 1, characterized in that, The step of binding physical marker points of key parts of the panoramic area feedback device with measurements of corresponding positions in the digital model of the regional recognition panoramic area feedback device to form physical marker point binding information specifically includes: Specify the absolute position of at least one feature point on the grid as a constraint in the grid coordinate reconstruction process; Convert the Laplace coordinates to Cartesian coordinates to complete the grid coordinate reconstruction; If the absolute position of the specified feature point after reconstruction changes compared to before coordinate reconstruction, the changes in the feature point position before and after reconstruction are fitted to form a correspondence between physical marker points and network coordinates. Based on the correspondence between physical markers and network coordinates, the physical markers of key parts of the panoramic area feedback device are bound to the measurements of the corresponding positions in the digital model of the panoramic area feedback device for regional identification, thus forming physical marker binding information.

6. The method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback according to claim 1, characterized in that, After obtaining the structural thermal and vibration deformation feedback from the panoramic region of the segmented identification, the data is stored in the cloud platform.

7. The method for measuring structural thermal and vibration deformation by regional identification and panoramic region feedback according to claim 6, characterized in that, The cloud platform adopts cloud computing platform and cloud storage technology, which divides the data storage architecture into three layers. The distributed big data storage layer is the core. It collects data from the ship control system included in the application layer, uses the MapReduce distributed parallel model to divide the data, and uses a safe and fault-tolerant storage algorithm to evenly divide the data to be stored into the corresponding computing server nodes in the hardware layer, thereby completing the effective storage of the data.

8. A structural thermal and vibration deformation measurement system with regional identification and panoramic feedback, characterized in that: include: The target location acquisition membrane is used to simulate the installation position of the structural thermal measurement device on the relevant equipment structure. Fixed hinges and movable hinges for structural thermal testing are arranged at the preset installation position. Displacement sensors and fiber optic strain sensors are installed on the movable hinges for structural thermal testing as the target location. The three-dimensional displacement acquisition module is used to acquire the three-dimensional coordinates of each target point on the movable hinge used for structural thermal testing, collect the changes in the three-dimensional coordinates when the movable hinge moves, and form the three-dimensional displacement of each target point. The decoupling module is used to decouple the measurement problem of structural heat feedback from the panoramic region into a temperature change model and a strain change model based on the center wavelength drift of the fiber optic strain sensor. The vibration deformation measurement and acquisition module is used to attach physical markers to key parts of the regional identification panoramic feedback device to perform vibration deformation measurement of the regional identification panoramic feedback. The digital model acquisition module is used to capture images of key parts, obtain the three-dimensional displacement of each target point, obtain the coordinates of the target point, and form a digital model of the panoramic area feedback device based on the coordinates. The binding information acquisition module is used to bind the physical marker points of key parts of the panoramic area feedback device with the measurements of the corresponding positions of the digital model of the panoramic area feedback device for regional identification, thus forming physical marker point binding information; The coordinate difference module is used to input the digital model of the regional identification panoramic area feedback device, the coordinates of physical marker points, and the binding information of physical marker points into the deformation interpolation algorithm for measurement based on Laplacian coordinates, and outputs the coordinates of all measured vertices of the digital model of the regional identification panoramic area feedback device. The strain change model acquisition module is used to calculate the deformation measurement of the regional identification panoramic feedback device based on the coordinates of all measurement vertices and the initial coordinates of the measurement vertices of the digital model of the regional identification panoramic feedback device, and obtain the deformation data of the regional identification panoramic feedback device as the strain change model. The combined module is used to obtain the structural thermal and vibration deformation of the panoramic region based on the temperature change model and the strain change model.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the structural thermal and vibration deformation measurement method according to any one of claims 1 to 7, which involves regional identification and panoramic region feedback.

10. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the structural thermal and vibration deformation measurement method according to any one of claims 1 to 7, which involves regional identification and panoramic region feedback.

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