CN104819694A - Flexible board-shaped structural form sensing and reconfiguring experiment platform - Google Patents

Abstract

The invention relates to an experimental platform for form perception and reconstruction of a flexible plate structure. The experimental platform includes an experimental base, a flexible plate structure with discrete distributed orthogonal fiber grating measuring points pasted on the surface, an arbitrary function signal generator, a signal power amplifier, a vibrator and its fixed The device, a three-dimensional slide table, a laser displacement sensor, a fiber grating network analyzer, an instrument-mounted computer, a server computer, and an experimental base are conveniently composed and simple in composition, and can be used to analyze the dynamic vibration effect of a flexible plate structure. On-line analysis and experimental effect evaluation can facilitate the research of various structure fitting and reconstruction algorithms.

Description

Experimental Platform for Form Perception and Reconstruction of Flexible Plate Structures

technical field

The invention relates to a form perception and reconstruction experiment platform of a flexible plate-like structure, in particular to a form perception and reconstruction experiment platform of a flexible plate-like structure fixed at one end.

Background technique

For the problem of shape perception and reconstruction of flexible plate structures, there are mainly two types of existing technology methods based on vision and non-vision. Among them, the basic method based on vision is based on image detection technology, using LED array to provide light source, CCD The sensor collects image information, and realizes the purpose of plate structure imaging through computer image processing software; the basic method based on non-vision is to obtain the strain information on the surface of the plate structure, convert the strain information into curvature information or displacement information, and perform geometric transmission. Pushing or displacement field superposition, using computer graphics technology to realize the shape perception and visual reconstruction of plate-like structures. Among the above two types of technical methods, the non-visual structural shape perception and reconstruction method has the advantages of small amount of collected data, high real-time performance, and easy coupling with structures, and has good application prospects in aerospace and related civil fields.

In the non-visual structure shape perception and reconstruction method, the core part is the fitting reconstruction algorithm of flexible structure shape change, which is mainly divided into surface fitting algorithm based on curvature information and modal superposition fitting reconstruction algorithm based on strain information There are two types, the former is suitable for the situation where the structural shape changes greatly, and the latter is suitable for the situation of small deformation of the structure at high frequency. In order to verify the effect and accuracy of the above structural shape fitting and reconstruction algorithm, a large amount of structural shape change data must be collected for error analysis; in the current experimental analysis and verification process, it is mainly by selecting limited measurement points, manually moving the laser displacement sensor or measuring Measurement with tools such as a ruler not only consumes a lot of manpower and time, but also the amount of measured data is limited, and the measurement accuracy cannot be guaranteed. In view of this, the present invention proposes an experimental platform for form perception and reconstruction of a flexible plate-like structure. The experimental model structure is made on the surface of the flexible plate-like structure by discretely and distributedly pasting orthogonal fiber grating measuring points, and combined with the experimental base, related The experimental platform is built with instruments and measurement and control software, which can realize the fitting reconstruction and real-time visual display of the shape change of the flexible plate structure, and then realize the effect verification and data analysis of the shape fitting reconstruction algorithm; in addition, the experimental platform also has automatic measurement The functions of data, automatic recording and saving, and synchronous error analysis reflect the high accuracy and automatic operation characteristics of the experimental process.

Contents of the invention

The purpose of the present invention is to provide an experimental platform for form perception and reconstruction of flexible plate structures, which can be used for form perception and reconstruction of flexible plate structures with discrete distributed orthogonal fiber grating measuring points pasted on the surface, and related flexible plate structures. The structural shape fitting reconstruction algorithm and implementation technology provide experimental verification means.

To achieve the above object, design of the present invention is:

The design uses the experimental base as the bearing device, the flexible plate structure with the fiber grating measuring point perpendicular to the surface as the experimental model structure, and the excitation system to constitute the deformation excitation source of the experimental model structure, combined with related instruments and measurement and control software. The experimental platform senses the structural shape change information of the experimental model through the sensor network composed of discrete distributed orthogonal fiber grating measuring points. By collecting the structural shape change information and running the structural shape fitting reconstruction algorithm in the computer, the flexible board is realized. Experimental verification and data analysis of shape fitting reconstruction algorithm for shape structures.

According to above-mentioned inventive concept, the present invention adopts following technical scheme:

An experimental platform for form perception and reconstruction of a flexible plate structure, including an experimental platform for form perception and reconstruction of a flexible plate structure, including an arbitrary function signal generator, a signal power amplifier, a vibrator, A flexible plate structure with discrete distributed orthogonal fiber grating measuring points pasted on the surface, a laser displacement sensor, a three-dimensional slide table, a three-dimensional slide table control box, a fiber grating network analyzer and an instrument-mounted computer, A server computer and an experimental base, characterized in that: the output of the arbitrary function signal generator is connected to the vibration exciter through the signal power amplifier, and the adjustable position of the vibration exciter is fixedly connected to the flexible plate structure on the experimental base Excitement is implemented on the flexible plate structure, and the output of the fiber grating measuring point pasted on the flexible plate structure is connected to the server computer through the fiber grating network analyzer; the three-dimensional sliding table is installed on the experimental base, and the laser displacement sensor is fixed on the three-dimensional sliding table and The three-dimensional mobile scanning of the fiber grating measuring point on the flexible plate structure can be realized, and the output of the laser displacement sensor is connected to the server computer; the output control signal of the server computer is connected to the three-dimensional sliding table through the three-dimensional sliding table control box; the arbitrary function signal The excitation signal output by the generator is applied to the exciter through the signal power amplifier, and the excitation applied by the exciter to the flexible plate structure causes it to produce corresponding morphological changes and vibration responses. The discrete distributed orthogonal The sensor network formed by the fiber grating measuring points detects the structural shape change signal, transmits it to the fiber grating network analyzer for demodulation, and transmits the demodulated data collected to the server computer through the instrument-mounted computer. The server computer runs including Structural shape fitting reconstruction algorithm, to realize the experimental verification and data analysis of flexible plate structure shape reconstruction and visual display.

An array of M6 threaded holes is attached to the surface of the above-mentioned experimental abutment, which can fix the vibrator, the experimental model structure fixture and the three-dimensional slide table fixing device.

The above vibration exciter can be fixed on the experimental base with bolts through the fixing device. At the same time, the specially designed fixing device can move freely in three orthogonal directions: front and rear, left and right, and up and down of the experimental base. The positions of the vibration points are also different, which can meet the needs of various experimental options for different excitation positions of the experimental model structure.

The above-mentioned displacement detection system realizes the functions of automatically measuring the deformation and displacement data of the experimental model structure, intelligently selecting the detection points on the surface of the experimental model structure, and automatically storing the detection data. The measurement points to be collected for the surface displacement data of the experimental model structure are selected through program programming, and the three-dimensional sliding table carries the laser displacement sensor to automatically move to the corresponding position, and the software automatically reads and saves the data of the laser displacement sensor. On the one hand, this automatic detection method can effectively and quickly obtain the detection data, on the other hand, it can significantly improve the accuracy of the experimental process and method verification, and reduce the measurement error.

For the above-mentioned experimental model structure, aiming at the sensor network layout problem composed of discrete distributed fiber grating measuring points, the particle swarm optimization algorithm is used to optimize the analysis and configuration of the measuring point positions. Through the limited discrete distributed measuring point layout, the maximum degree It accurately reflects the deformation status of the flexible plate experimental model structure, and effectively improves the realization accuracy of the structure shape fitting reconstruction algorithm.

Using the above-mentioned experimental platform to carry out the experimental method of shape perception and reconstruction of flexible plate-like structures, the relevant operation steps are as follows:

(1) Turn on the server computer and run the measurement and control software;

(2) Initialize the coordinate system: the laser point of the laser displacement sensor is located at the middle point of the lowermost end of the experimental model structure, which is set as the coordinate origin;

(3) Start the arbitrary function signal generator, set the frequency and amplitude of the excitation signal, start the signal power amplifier, and slowly increase the amplification gain;

(4) Start the vibrator to excite the experimental model structure;

(5) Move the laser point of the laser displacement sensor to the detection point;

(6) Run the structural shape fitting reconstruction algorithm, and observe the structural shape reconstruction effect of the experimental model on the software interface;

(7) Error analysis for a certain detection point: For a certain detection point on the surface of the experimental model structure, analyze the data measured by the laser displacement sensor, and compare the reconstruction data of the monitoring point position obtained by the structure fitting reconstruction algorithm, Through the mean square error analysis, the structural shape reconstruction effect verification and accuracy test are realized.

Compared with the prior art, the present invention has the following prominent substantive features and significant advantages:

(1) There are threaded holes on the surface of the experimental abutment, which can facilitate the fixing of the experimental model structure, vibrator and three-dimensional slide table, and facilitate adjustment, installation and disassembly, ensuring that the experimental process is convenient and orderly.

(2) The vibrator fixing device can be moved by the position of the fixing bolt to realize the small-scale movement of the vibrator in three directions: front and back, up and down, and left and right within its moving range, so as to set different excitation points for the experimental model structure, so that It meets the selection requirements of various experimental schemes for different excitation positions.

(3) The three-dimensional sliding table equipped with a laser displacement sensor adopts two methods of program control and controller, which can automatically move, automatically select points, and automatically read within the measurement range to achieve precise positioning for different detection points and accurate detection. Functions to meet the requirements of reducing experimental errors and improving experimental accuracy. Among them, when the laser displacement sensor reaches the measurement range, under the control of the program, the three-dimensional slide table can be used to move back and forth to expand the measurement range, and meet the requirements of single accurate measurement in the case of large deformation of the experimental model structure.

(3) Taking the measurement channel and bandwidth limit of the fiber grating network analyzer as the conditional constraints, taking the calculation characteristics of the structural shape fitting reconstruction algorithm as the algorithm constraints, and using the finite element analysis software to obtain the stress distribution of the flexible plate structure as the strain constraints, The coordination scheme of each fiber grating measuring point is calculated by using the optimization algorithm, which solves the optimal layout problem of the discrete distributed sensor network on the surface of the experimental model structure.

(4) Adopt the C/S software architecture mode, modularize the functions of the measurement and control software system, realize the real-time acquisition of sensor network data, and realize the reconstruction of the structure and shape of the flexible plate experimental model and the three-dimensional visualization display, and at the same time, the software can be enhanced Extensibility, which facilitates adding more required functions.

(5) The VC++ measurement and control software developed based on the VC6.0 development environment, on the one hand, can realize the structure reconstruction and three-dimensional visualization display of the flexible plate-shaped experimental model, and has the functions of data storage and experimental data analysis; on the other hand, it can control The three-dimensional sliding table moves, and the data interaction function between the instrument-mounted computer and the server computer can be realized.

(6) The experimental platform system completed by the present invention can be used to verify the effectiveness and practicability of various plate structure shape perception and reconstruction algorithms, and provides a combination of hardware and software for the research on flexible plate structure shape reconstruction methods Experimental verification platform.

Description of drawings

Fig. 1 is a schematic structural diagram of the form perception and reconstruction experiment platform of the flexible plate-like structure of the present invention.

Figure 2 is a photograph of the overall physical object of the experimental platform shown in Figure 1.

Fig. 3 is a functional block diagram of the server computer and the onboard computer in Fig. 1 .

Figure 4 is an effect diagram of the reconstruction of the shape of the flexible plate structure.

Fig. 5 is a vibration curve diagram of a measurement point on the surface of the flexible plate structure in the experiment.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the scope of protection claimed by the present invention is not limited to the scope expressed by the examples.

Embodiment one:

Referring to Figure 1, the experimental platform for shape perception and reconstruction of flexible plate structures includes an arbitrary function signal generator (1), a signal power amplifier (2), a vibrator (3), and a surface-adhesive A flexible plate structure with discrete distributed orthogonal fiber grating measuring points (4), a laser displacement sensor (5), a three-dimensional sliding table (6), a three-dimensional sliding table control box (7), an optical fiber Grating network analyzer (8) and instrument-mounted computer, a server computer (9) and an experimental base, are characterized in that: the output of described arbitrary function signal generator (1) is connected to The exciter (3), the adjustable position of the exciter (3) is fixedly connected with the flexible plate-shaped structure to implement excitation on the experimental base, and the output of the fiber grating measuring point pasted on the flexible plate-shaped structure (4) passes through the fiber grating The network analyzer (8) is connected to the server computer (9); the three-dimensional sliding table (6) is installed on the experimental base, and the laser displacement sensor (5) is fixed on the three-dimensional sliding table (6) to realize the adjustment of the flexible board. The three-dimensional mobile scanning of the fiber grating measuring point on the shape structure (4), the output of the laser displacement sensor (5) is connected to the server computer (9); the output control signal of the server computer (9) is connected through the three-dimensional sliding table control box (7) to the three-dimensional slide table (6); the output excitation signal of the arbitrary function signal generator (1) acts on the exciter (3) through the signal power amplifier (2), and the exciter (3) is to the flexible plate structure (4 ) to generate corresponding morphological changes and vibration responses, and the sensor network composed of discrete distributed orthogonal fiber grating measuring points pasted on the surface of the flexible plate structure (4) detects the structural morphological change signals and transmits them to The fiber grating network analyzer (8) performs demodulation, and transmits the collected demodulation data to the server computer (9) through the instrument-mounted computer, and the server computer (9) runs a reconstruction algorithm including structural shape fitting to realize flexible Experimental verification and data analysis of morphological reconstruction and visualization of plate-like structures.

Embodiment two:

Referring to Figures 2 to 5, this embodiment is basically the same as Embodiment 1, and the special features are as follows: the flexible plate-like structure form perception and reconstruction experimental platform, the surface of the experimental base is equipped with an array of M6 threaded holes, which can be fixed The vibrator (3), the flexible plate-like structure (4) and the three-dimensional slide table (6), wherein the fixing device of the vibrator (3) can move the position of the fixing bolt to realize the movement of the vibrator back and forth, Small-scale movement in three orthogonal directions of up and down, left and right, so as to set different excitation points for the flexible plate structure (4), so as to meet the selection requirements of various experimental schemes for different excitation positions; configure a laser displacement sensor (5) The three-dimensional sliding table (6) adopts two methods of program control and controller control, which can automatically move, automatically select points, and automatically read within the measurement range, so as to realize precise positioning and precise detection functions for different detection points, and meet the requirements of reducing In order to meet the requirements of experimental error and improvement of experimental accuracy, the laser displacement sensor (5) uses the three-dimensional slide table (6) to move back and forth under the control of the program when it reaches the measurement range, so as to expand the measurement range and meet the requirements of the flexible plate structure (4). Requirements for a single accurate measurement under deformation; the conditional constraints of the fiber grating network analyzer (8) measurement channel and bandwidth range restrictions, the calculation characteristics of the shape fitting reconstruction algorithm of the flexible plate structure (4) as the algorithm constraints, and the Using the finite element analysis software, the stress distribution of the flexible plate structure is obtained as a strain constraint, and the coordination scheme of each fiber grating measuring point is calculated by using the optimization algorithm, which solves the optimal layout problem of the discrete distributed sensor network on the surface of the flexible plate structure (4); The server computer (9) is embedded in the measurement and control software system, which has modular functions, strong reliability and portability, and can realize the control, data storage and experimental data analysis of the three-dimensional sliding table (6), and has four built-in structural shape fittings The reconstruction algorithm realizes the online analysis and error evaluation of the shape reconstruction effect of the flexible plate structure (4). Research on combined reconstruction algorithms.

Embodiment three:

As shown in Figure 1, the experimental platform for shape perception and reconstruction of flexible plate structures includes an arbitrary function signal generator ① (model: SFG-2110, manufacturer: GW Inst Electronics Co., Ltd.), a signal power Amplifier ② (Model: YE5872 Manufacturing unit: Jiangsu Lianeng Electronic Technology Co., Ltd.), a vibrator and its fixing device ③ (Model: JZK-10 Manufacturing unit: Jiangsu Lianeng Electronics Co., Ltd.), a discrete Flexible plate structure of distributed orthogonal fiber grating measuring points ④, a laser displacement sensor ⑤ (model: LK-G400, manufacturer: Keyence Co., Ltd.), a 3D sliding table ⑥, a 3D sliding table control box ⑦ (manufacturer: Department of Automation, Shanghai University), a fiber grating network analyzer and on-board computer ⑧ (model: FONA-2008C manufacturer: Shanghai Zishan Photoelectric Technology Co., Ltd.) and a server computer ⑨ (model: I500 -7255 production unit: Founder Technology Group Co., Ltd.), the overall physical photo of the experimental platform is shown in Figure 2.

Using the above-mentioned experimental platform to carry out experiments, the experimental steps are as follows:

(1) Fix the three-dimensional slide table and the vibrator on the experimental base using the designed and manufactured fixtures. The flexible plate-shaped experimental model uses a plexiglass plate, and one end is fixed on the experimental base.

(2) Use the finite element analysis software to establish the strain model of the flexible plate experimental model, and obtain the natural frequency, mode shape and strain distribution of each order of the flexible plate experimental model. According to the strain distribution and the calculation characteristics of the fitting algorithm, use The particle swarm optimization algorithm optimizes the analysis and configuration of the sensor network layout.

(3) Use glue to paste the fiber grating on the discrete distributed measuring point position of the flexible plate-shaped experimental model after optimized analysis and configuration, a total of 25 sets of orthogonal measuring points, and the surface is pasted with discrete distributed orthogonal fiber grating measuring points Fabrication of the flexible plate-like structure ④.

(4) Fix the vibrator ③ on the experimental platform, and connect it with the flexible plate-like structure ④ with discrete distributed orthogonal fiber grating measuring points pasted on the surface through the vibrator connecting rod device, and use the data transmission line to transmit the signal The power amplifier ② is connected to the exciter ③.

(5) Start the arbitrary function signal generator ①, and set the excitation signal amplitude and frequency according to the vibration experiment requirements.

(6) Start the signal power amplifier ② to drive the exciter ③, and excite the flexible plate structure ④ with discrete distributed orthogonal fiber grating measuring points pasted on the surface to make it vibrate.

(7) Turn on the fiber grating network analyzer, the instrument-mounted computer ⑧, the server computer ⑨ and the laser displacement sensor ⑤, run the measurement and control software, obtain the strain data of the fiber grating, and save the data.

(8) Select the structural shape fitting reconstruction algorithm, send the position coordinates of the detection points to the control box of the three-dimensional sliding table⑦, the three-dimensional sliding table ⑥ carries the laser displacement sensor ⑤ to move to the target position, obtain the scanning detection data of the laser displacement sensor ⑤, and save data.

(9) From the measurement and control software interface, observe the flexible plate structure with discrete distributed orthogonal fiber grating measuring points on the surface ④ Reconstruction and the vibration curve of the measuring point, calculate the mean square error of the measuring point, and analyze the reconstruction of the fitting algorithm Effect, to judge the practicability and effectiveness of the algorithm.

In step (1), the flexible plate structure ④ used in this embodiment with discrete distributed orthogonal fiber grating measuring points pasted on the surface is a plexiglass plate, and the material density is , Young's modulus is , Poisson's ratio is 0.3, the length is 800mm, the width is 800mm, and the thickness is 5mm.

In step (2), according to the calculation characteristics of the structure fitting reconstruction algorithm, the FBG measuring points should be arranged in the entire row and column as far as possible and meet the spacing constraints. At the same time, considering the strain distribution of the plate structure, try to distribute it at the position with large strain. The group optimization algorithm obtains the optimal layout and coordination scheme of measuring points, which is used as the measuring point position of the pasted fiber grating strain sensor.

In step (3), in this embodiment, Araldite glue is used to paste the fiber grating on the surface of the flexible plate-shaped experimental model to ensure that the optical fiber grating strain sensor is coupled with the flexible plate-shaped experimental model, and the real response flexible plate-shaped experimental model strain status.

In the step (4) of the dynamic vibration experiment, the experimental platform of this embodiment is an optical platform GZ103PTB with an array of M6 threaded holes on the surface, which can realize the fixed installation of the vibrator, the flexible plate-shaped experimental model and the three-dimensional slide table. Through the vibrator fixing device, the installation position of the vibrator can be adjusted arbitrarily. Reassembly and disassembly of plate-shaped experimental models.

The measurement and control software program used in this embodiment is modular, has strong reliability and portability, and can realize functions such as three-dimensional sliding table control, data storage, and experimental data analysis. On-line analysis and error evaluation of the structural shape reconstruction effect of the flexible plate-shaped experimental model, and the interface of other structural shape fitting reconstruction algorithms is reserved, which can facilitate the research of various shape fitting reconstruction algorithms.

The data storage format adopted in this embodiment is a common txt file format, which is convenient for using other software to perform complex analysis and post-processing of the data. Figure 4 is the reconstruction effect diagram of the flexible plate-like structure, and Figure 5 is the surface of the flexible structure in the experiment Vibration graph of a measurement point.

Claims (5)

1. An experimental platform for shape perception and reconstruction of a flexible plate structure, including an arbitrary function signal generator (1), a signal power amplifier (2), a vibrator (3), and a A flexible plate-like structure for discretely distributed orthogonal fiber grating measuring points (4), a laser displacement sensor (5), a three-dimensional sliding table (6), a three-dimensional sliding table control box (7), and a fiber grating Network analyzer (8) and instrument-mounted computer, a server computer (9) and an experiment base station, it is characterized in that: the output of described arbitrary function signal generator (1) is connected to excitation through signal power amplifier (2) The vibrator (3), the adjustable position of the vibrator (3) and the flexible plate structure are fixedly connected to the experimental base for excitation, and the output of the fiber grating measuring point pasted on the flexible plate structure (4) passes through the fiber grating network The analyzer (8) is connected to the server computer (9); the three-dimensional sliding table (6) is installed on the experimental base, and the laser displacement sensor (5) is fixed on the three-dimensional sliding table (6) so as to realize the measurement of the flexible plate The three-dimensional mobile scanning of the fiber grating measuring point on the structure (4), the output of the laser displacement sensor (5) is connected to the server computer (9); the output control signal of the server computer (9) is connected to the three-dimensional slide table control box (7) The three-dimensional sliding table (6); the excitation signal output by the arbitrary function signal generator (1) acts on the exciter (3) through the signal power amplifier (2), and the exciter (3) acts on the flexible plate structure (4) The applied excitation makes it produce corresponding morphological changes and vibration responses, and the sensor network composed of discrete distributed orthogonal fiber grating measuring points pasted on the surface of the flexible plate structure (4) detects the structural morphological change signals and transmits them to the optical fiber The grating network analyzer (8) performs demodulation, and transmits the collected demodulation data to the server computer (9) through the instrument-mounted computer, and the server computer (9) runs a reconstruction algorithm including structural shape fitting to realize flexible board Experimental verification and data analysis of shape reconstruction and visualization of shape structures. 2. The flexible plate-like structure form perception and reconstruction experimental platform according to claim 1, characterized in that: the surface of the experimental base is provided with an array of M6 threaded holes, which can fix the vibrator (3), flexible plate-like structure (4) and the three-dimensional sliding table (6), wherein the fixing device of the vibrator (3) can move the position of the fixing bolt to realize the small range of the vibrator in three orthogonal directions of front, back, up and down, and left and right within its moving range Move so as to set different excitation points for the flexible plate structure (4), so as to meet the selection requirements of various experimental schemes for different excitation positions. 3. The experimental platform for form perception and reconstruction of flexible plate structures according to claim 1, characterized in that: the three-dimensional slide table (6) configured with laser displacement sensors (5) adopts two modes of program control and controller control, It can automatically move, automatically select points, and automatically read within the measurement range to achieve precise positioning and precise detection functions for different detection points, meeting the requirements of reducing experimental errors and improving experimental accuracy. Among them, the laser displacement sensor (5) can achieve When measuring the range, under the control of the program, the three-dimensional sliding table (6) is used to move forward and backward to expand the measurement range, and meet the requirements of single accurate measurement under the large deformation of the flexible plate structure (4). 4. flexible plate-like structure form perception and reconstruction experiment platform according to claim 1, is characterized in that: with fiber grating network analyzer (8) measuring channel and bandwidth limit as conditional constraints, with flexible plate-like structure ( 4) The calculation feature of the shape fitting reconstruction algorithm is the algorithm constraint. Using the finite element analysis software to obtain the stress distribution of the flexible plate structure as the strain constraint, the optimization algorithm is used to calculate the coordination scheme of each fiber grating measuring point, which solves the problem of flexible plate structure Structure (4) Optimal layout problem of surface discrete distributed sensor network. 5. The flexible plate structure form perception and reconstruction experiment platform according to claim 1, characterized in that: the server computer (9) is implanted into a measurement and control software system, which has modular functions, strong reliability and portability, and can It realizes the control, data storage and experimental data analysis of the three-dimensional sliding table (6), and has built-in four kinds of structure shape fitting and reconstruction algorithms to realize the online analysis and error evaluation of the shape reconstruction effect of the flexible plate structure (4). The interface of other flexible plate structure shape fitting reconstruction algorithms is reserved, which can facilitate the research of various shape fitting reconstruction algorithms.