System for measuring hull data of FPSO (Floating Production Storage and Offloading) modified ship in floating state

Abstract

The invention discloses a hull data measurement system for an FPSO (floating production storage and offloading) refitted ship in a floating state, and relates to the related technical field of engineering surveying. Coordinate measurement and calibration are carried out, benchmark coordinates are converted according to rotation parameters and displacement parameters when a hull shakes, and a shaken hull coordinate system is converted into a stable geodetic coordinate system; therefore, no matter how the ship shakes, the accuracy of the final measurement result is not influenced, and the measurement result is still accurate and available after the ship enters a dock to be supported and positioned, so that the measurement of ship body data and the positioning of a large modular structure are performed in advance when the ship is in a floating state, and the refitting time is saved.

Description

Technical Field

[0001] The present invention relates to the technical field related to engineering measurement, and in particular to a hull data measurement system for a FPSO modified ship in a floating state. Background Art

[0002] In the field of large-scale ship modification, especially FPSO modification projects, the main hull of the ship often needs to be modified and constructed while berthing at the dock for a long time. This modification usually involves large-scale structural changes in the deck area, such as adding or modifying various functional modules to meet the needs of producing, storing and unloading crude oil. The deck area structural modification range of FPSO modified ships is extensive, which may be up to 250 meters long and 50 meters wide. Such a size makes precise loading and positioning during the modification process an extremely challenging task.

[0003] Traditional measuring tools, such as plumb bobs, tape measures and levels, are inadequate for the loading and positioning of large module structures in FPSO modifications, especially when it comes to module support structures with a height of about 5 meters, strict dimensional requirements and wide distribution. The accuracy and efficiency of these traditional tools cannot meet the requirements. Therefore, high-precision measuring equipment such as total stations have become a necessary choice.

[0004] However, even with the use of advanced measurement tools such as total stations, the FPSO modification process still faces a series of technical difficulties. First, as the modification project progresses, large-scale construction will be carried out in the deck area, and a large number of equipment and materials of different professions will occupy the deck space, which will not only affect the measurement work of the total station, but may also have an adverse effect on the progress and quality of the modification. Therefore, the measurement and positioning work can only be carried out in advance before the equipment enters the site and when the ship is floating on the sea. However, the positioning of large modular structures when the ship is floating lacks an accurate reference benchmark, making it difficult to ensure positioning accuracy.

[0005] Therefore, in order to solve these problems existing in the FPSO modification process, it is necessary to develop a more accurate and efficient hull data measurement system to guide the loading and positioning of large module structures and ensure the smooth progress and final quality of the modification project. Summary of the invention

[0006] The purpose of the present invention is to provide a hull data measurement system for a FPSO conversion ship in a floating state, so as to solve the problem in the above background that the traditional FPSO conversion process lacks an accurate reference benchmark, making it difficult to ensure positioning accuracy.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hull data measurement system for a FPSO converted ship in a floating state, comprising a basic data acquisition module, a data analysis and optimization module, a positioning benchmark and coordinate network establishment module, a real-time data tracking and deformation monitoring module and an error analysis and optimization module; The basic data acquisition module is used to measure the basic data of the original ship deck before the ship modification, and provide accurate data for the subsequent coordinate network establishment; The data analysis and optimization module is used to conduct in-depth analysis of the original data provided by the basic data acquisition module, identify the differences between the original ship structure and the design requirements, and distribute the deviations to each module through the optimization algorithm to reduce the cumulative error and ensure the perfect fit between the new module and the original ship structure; The positioning pole and coordinate network establishment module is designed to set up a series of positioning poles in the main deck area through precise measurement and positioning, and mark accurate coordinate information on them, so as to form a coordinate network covering the entire ship. This network will provide a reliable reference benchmark for subsequent structural module loading, positioning and ship deformation monitoring; The coordinate network verification and optimization is aimed at selecting some of the benchmarks for repeated measurement, cross-validation, verifying the accuracy of the coordinate measurement, re-measuring the benchmarks with large errors and updating the coordinate information; The data management and visualization module is used to manage the data of the entire measurement system, including basic data, analysis results, positioning data, etc., and provide visual data display.

[0008] Furthermore, the implementation scheme of the basic data acquisition module includes the following steps: S201. Use a high-precision total station to conduct all-round measurement of the deck area; S202. Record deck rib positions, longitudinals and plane data; S203. Organize and analyze the measurement data to provide a basis for establishing a coordinate network.

[0009] Furthermore, the specific implementation of the data analysis and optimization module includes the following steps: S301. Data preprocessing: Check the integrity and accuracy of the original data, remove duplicate, invalid and erroneous data, then convert the original data into a format suitable for analysis, and integrate all data provided by the basic data acquisition module to form a complete data set; S302. Deviation analysis: Compare and analyze the original ship data with the design data to identify the differences and deviations between the two. According to the nature and size of the deviations, the deviations are divided into deviations within the acceptable range, deviations that need to be adjusted, and deviations that cannot be adjusted. Statistical and visualization tools are used to display the distribution of deviations on the hull and identify areas and modules with large deviations. S303. Deviation optimization: Based on the results of deviation analysis and the specific requirements of the hull structure and module loading, the deviation is evenly distributed to each module.

[0010] Furthermore, the data set integrated in the data preprocessing step includes deck rib positions, longitudinal bones and plane dimensions.

[0011] Furthermore, the implementation steps of the positioning pole and coordinate network establishment module include: S501. Determination of the location of the benchmarks: Design the layout of the coordinate benchmarks according to the hull structure and modification requirements to ensure that the benchmarks are evenly distributed and cover all key measurement areas; S502. Installation of markers: According to the deck area layout and key module location information, mark the installation position of each marker on the hull deck. According to the determined position, use special installation tools to vertically fix the marker on the deck to ensure that the marker is stable, vertical, and easy to observe and measure; S503. Coordinate measurement: Use a total station to accurately measure the top of each pole, determine its three-dimensional coordinates, mark the coordinate information on the pole, and facilitate subsequent data query and analysis. Enter the coordinate information of all poles into the database and draw a coordinate network diagram. The network diagram marks the position and coordinate information of each pole, and facilitates subsequent data query and analysis; S504. Coordinate network verification and optimization: Select some benchmarks for repeated measurement and cross-validation to verify the accuracy of coordinate measurement. Re-measure the benchmarks with large errors and update the coordinate information. According to the verification results, optimize and adjust the coordinate network to ensure the reliability of the entire network.

[0012] Furthermore, after the position of the benchmark is determined in S501, the deck is surveyed to confirm the feasibility of the benchmark position to avoid conflicts with existing structures and equipment. According to the survey results, the position of the benchmark is adjusted to ensure that the measurement requirements are met and subsequent construction is not affected.

[0013] Furthermore, in the step S503. of measuring coordinates, when measuring the coordinates of the pole, the coordinates of the pole are converted from the ship coordinate system to a stable earth coordinate system.

[0014] Furthermore, the coordinate system conversion includes the following steps: S801. Determine the common points: First, confirm the coordinates of the three common points in the hull coordinate system and the earth coordinate system. The coordinates of the three common points are as follows: Point 1: Its coordinates in the ship coordinate system are (X1, Y1, Z1), and its coordinates in the earth coordinate system are (x1, y1, z1); Point 2: Its coordinates in the ship coordinate system are (X2, Y2, Z2), and its coordinates in the earth coordinate system are (x2, y2, z2); Point 3: The coordinates in the hull coordinate system are (X3, Y3, Z3), and the coordinates in the earth coordinate system are (x3, y3, z3).

[0015] S802. Determine the conversion parameters: The conversion parameters include three rotation parameters R x , R y , R z , are the rotation angles of the hull around the X-axis, Y-axis and Z-axis, and also include three translation parameters T x 、T y 、T z , which correspond to the translation of the hull in the X, Y, and Z directions respectively. The conversion parameters and translation parameters are derived from the ship's motion state monitoring. There is also a scale parameter μ, which can be set according to the needs. Where the rotation parameter R x , R y , R z Respectively represent the rotation of the hull around the X axis R x Radians, rotation R around the Y axis y Angle, rotation around the Z axis R z angle; The translation parameter T x 、T y 、T z Respectively represent the translation of the hull in the X direction T x meters, translate in the Y direction T y meters, translate in Z direction T z rice; The scale parameter μ represents that the earth coordinate system is magnified by μ relative to the ship coordinate system; S803. Construct a rotation matrix: For small angle rotation, the rotation matrix M is: ; Among them, α, β, and γ are the rotation angles around the X-axis, Y-axis, and Z-axis respectively, and α, β, and γ are converted according to the rotation parameters Rx, Ry, and Rz; S804. Apply the conversion formula: For any point X in the ship coordinate system, its coordinate X′ in the earth coordinate system is calculated by the following formula: ; Where μ is the scale parameter, M is the rotation matrix, and a is the translation vector.

[0016] Furthermore, the specific implementation method of the real-time data tracking and deformation monitoring module includes the following steps: S901. Monitoring point layout and sensor installation: According to the hull structure and deformation characteristics, select reasonable benchmarks on the hull as monitoring point locations, and install displacement sensors and acceleration sensors on the benchmarks; S902. Real-time monitoring: Use sensors to collect displacement data of monitoring points in real time, and transmit the collected displacement data to the data processing center by wireless or wired means to ensure the stability and reliability of data transmission and avoid data loss; S903. Data storage: The deformation data transmitted to the data processing center is stored and managed.

[0017] Furthermore, the implementation method of the data management and visualization module includes the following steps: S1001. Data collection and integration: Identify data sources, including real-time monitoring data, historical data, and external data sources, then clean the collected data, remove duplicate, invalid or erroneous data, pre-process the data, convert the format and unify the units, and finally integrate the cleaned data into a unified data warehouse or database to facilitate subsequent data management and analysis; S1002. Data storage and management: Design a reasonable database structure, including data tables, indexes and views, based on data characteristics and requirements, and formulate a data backup strategy to ensure data security and integrity; at the same time, establish a data recovery mechanism to deal with possible data loss or damage, and then control data access based on user roles and permissions to ensure data confidentiality and security; S1003. Data analysis and mining: Build appropriate data analysis models based on business needs, extract valuable information and patterns from massive data, provide support for decision-making, and then verify the analysis results to ensure their accuracy and reliability. Finally, optimize the analysis models and algorithms based on the verification results. S1004. Data visualization design: According to user needs, clarify the visualization goals and content, including hull deformation trends and structural status distribution. According to visualization needs and data characteristics, select visualization tools, including tables, charts, maps and dashboards.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a hull data measurement system for a FPSO modified ship in a floating state. When performing coordinate measurement calibration, the benchmark coordinates are converted according to the rotation parameters and displacement parameters of the hull when the ship is shaking, and the coordinate system of the shaking hull is converted into a stable earth coordinate system. In this way, no matter how the ship shakes, it will not affect the accuracy of the final measurement result. The measurement result is still accurately available after the ship enters the dock support positioning. In this way, the hull data measurement and the positioning of large module structures are realized in advance when the ship is in a floating state, which saves the modification time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the hull data measurement system of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, a hull data measurement system for a FPSO converted ship in a floating state includes a basic data acquisition module, a data analysis and optimization module, a positioning benchmark and coordinate network establishment module, a real-time data tracking and deformation monitoring module, and a data management and visualization module.

[0022] 1. The basic data acquisition module is used to measure the basic data of the original ship deck before the ship modification, and provide accurate data for the subsequent coordinate network establishment. The implementation plan of the basic data acquisition module includes the following steps: S1. Use a high-precision total station to conduct a full-scale measurement of the deck area; S2. Record the deck rib positions, longitudinals and plane data; S3. Organize and analyze the measurement data to provide a basis for establishing the coordinate network.

[0023] 2. The data analysis and optimization module is used to conduct in-depth analysis of the original data provided by the basic data acquisition module, identify the differences between the original ship structure and the design requirements, and distribute the deviations to each module through the optimization algorithm to reduce the cumulative error and ensure the perfect fit between the new module and the original ship structure. The specific implementation of the data analysis and optimization module includes the following steps: 1. Data preprocessing: Check the integrity and accuracy of the original data, remove duplicate, invalid or erroneous data, and then convert the original data into a format suitable for analysis. In addition, integrate all data provided by the basic data acquisition module to form a complete data set, which includes deck rib positions, longitudinals and planar dimensions.

[0024] 2. Deviation analysis: Compare and analyze the original ship data with the design data to identify the differences and deviations between the two. According to the nature and size of the deviation, the deviation is divided into deviations within the acceptable range, deviations that need to be adjusted, and deviations that cannot be adjusted. Use statistical and visualization tools to display the distribution of deviations on the hull and identify areas and modules with larger deviations.

[0025] 3. Deviation optimization: According to the results of deviation analysis and the specific requirements of the hull structure and module loading, the deviation is evenly distributed to each module.

[0026] 3. The module for establishing the positioning pole and coordinate network aims to set up a series of positioning poles in the main deck area through precise measurement and positioning, and mark accurate coordinate information on them, so as to form a coordinate network covering the entire ship. This network will provide a reliable reference benchmark for the subsequent loading and positioning of structural modules and monitoring of ship deformation. The implementation steps of the positioning pole and coordinate network establishment module include: 1. Determine the location of the benchmark: According to the hull structure and modification requirements, design the layout of the coordinate benchmark to ensure that the benchmarks are evenly distributed and cover all key measurement areas. Conduct a survey on the deck to confirm the feasibility of the benchmark location and avoid conflicts with existing structures and equipment. According to the survey results, adjust the benchmark position to ensure that the measurement requirements are met and do not affect subsequent construction.

[0027] 2. Installation of benchmarks: According to the deck area layout and key module location information, mark the installation position of each benchmark on the hull deck. According to the determined position, use special installation tools to fix the benchmark vertically on the deck to ensure that the benchmark is stable, vertical, and easy to observe and measure.

[0028] 3. Coordinate measurement: Use a total station to accurately measure the top of each pole to determine its three-dimensional coordinates, mark the coordinate information on the pole to facilitate subsequent data query and analysis, enter the coordinate information of all poles into the database, and use professional software tools to draw a coordinate network diagram. The network diagram marks the position and coordinate information of each pole to facilitate subsequent data query and analysis.

[0029] Ships floating on the sea will sway with the waves, causing the ship to sway up and down, sway back and forth, and bump left and right, which will cause the total station's telescope line of sight to be unstable, thus affecting the accuracy of the measurement. Since the ship's shaking is continuous and irregular, the total station will be constantly disturbed during the measurement process, resulting in unstable measurement data. Therefore, we use a coordinate system conversion solution to convert the shaking hull coordinate system into a stable geodetic coordinate system, thereby avoiding coordinate point deviations caused by the hull shaking. The coordinate system conversion includes the following steps: S1. Determine the common points: First, confirm the coordinates of the three common points in the hull coordinate system and the earth coordinate system. The coordinates of the three common points are as follows: Point 1: Its coordinates in the ship coordinate system are (X1, Y1, Z1), and its coordinates in the earth coordinate system are (x1, y1, z1); Point 2: Its coordinates in the ship coordinate system are (X2, Y2, Z2), and its coordinates in the earth coordinate system are (x2, y2, z2); Point 3: The coordinates in the hull coordinate system are (X3, Y3, Z3), and the coordinates in the earth coordinate system are (x3, y3, z3).

[0030] S2. Determine the transformation parameters: The transformation parameters include three rotation parameters R x , R y , R z , are the rotation angles of the hull around the X-axis, Y-axis and Z-axis, and also include three translation parameters T x , T y , T z , which correspond to the translation of the hull in the X, Y, and Z directions respectively. The conversion parameters and translation parameters are derived from the ship's motion state monitoring. There is also a scale parameter μ, which can be set according to the needs. The rotation parameter R x , R y , R z Respectively represent the rotation of the hull around the X axis R x Radians, rotation R around the Y axis y Angle, rotation around the Z axis R z angle; Translation parameter T x , T y , T z Respectively represent the translation of the hull in the X direction T x meters, translate in the Y direction T y meters, translate in Z direction T z rice; The scale parameter μ represents the enlargement of the earth coordinate system by S relative to the ship coordinate system.

[0031] S3. Construct the rotation matrix: For small angle rotation, the rotation matrix M is: ; Among them, α, β, and γ are the rotation angles around the X-axis, Y-axis, and Z-axis respectively, and α, β, and γ are converted according to the rotation parameters Rx, Ry, and Rz; S4. Application of conversion formula: For any point X in the ship coordinate system, its coordinate X′ in the earth coordinate system is calculated by the following formula: ; Where μ is the scale parameter, M is the rotation matrix, and a is the translation vector.

[0032] 4. Coordinate network verification and optimization: Select some benchmarks for repeated measurement, cross-validation, verify the accuracy of coordinate measurement, re-measure benchmarks with large errors and update coordinate information. According to the verification results, the coordinate network is optimized and adjusted to ensure the reliability of the entire network.

[0033] 4. The real-time data tracking and deformation monitoring module is used to track and measure coordinate data, analyze the deformation state of the ship in a floating state, such as arching, sagging and twisting, and guide the carrying and positioning, while ensuring that the benchmark will not change or shift after the coordinates are calibrated. The specific implementation method of the real-time data tracking and deformation monitoring module includes the following steps: 1. Monitoring point layout and sensor installation: According to the hull structure and deformation characteristics, select reasonable benchmarks on the hull as monitoring point locations, and install displacement sensors and acceleration sensors on the benchmarks.

[0034] 2. Real-time monitoring: Use sensors to collect displacement data of monitoring points in real time, and transmit the collected displacement data to the data processing center by wireless or wired means to ensure the stability and reliability of data transmission and avoid data loss or errors.

[0035] 3. Data storage: The deformation data transmitted to the data processing center will be stored and managed. The data storage should have a large capacity and high security to ensure the integrity and traceability of the data.

[0036] 5. The data management and visualization module is used to manage the data of the entire measurement system, including basic data, analysis results, positioning data, etc., and provide visual data display. The specific implementation of the data management and visualization module includes the following steps: 1. Data collection and integration: Identify data sources, including real-time monitoring data, historical data, and external data sources. Clean the collected data to remove duplicate, invalid, or erroneous data. Preprocess the data to convert the format and unify the units. Finally, integrate the cleaned data into a unified data warehouse or database to facilitate subsequent data management and analysis.

[0037] 2. Data storage and management: Design a reasonable database structure, including data tables, indexes and views, based on data characteristics and requirements, and formulate a data backup strategy to ensure data security and integrity; at the same time, establish a data recovery mechanism to deal with possible data loss or damage, and then control access to data based on user roles and permissions to ensure data confidentiality and security.

[0038] 3. Data analysis and mining: Build appropriate data analysis models based on business needs, extract valuable information and patterns from massive data to provide support for decision-making, then analyze the results for verification to ensure their accuracy and reliability, and finally optimize the analysis models and algorithms based on the verification results.

[0039] 4. Data visualization design: According to user needs, clarify the visualization goals and content, including hull deformation trends and structural status distribution. According to visualization needs and data characteristics, select visualization tools, including tables, charts, maps and dashboards.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hull data measurement system for a FPSO converted ship in a floating state, characterized in that: It includes basic data acquisition module, data analysis and optimization module, positioning benchmark and coordinate network establishment module, real-time data tracking and deformation monitoring module and error analysis and optimization module; The basic data acquisition module is used to measure the basic data of the original ship deck before the ship modification, and provide accurate data for the subsequent coordinate network establishment; The data analysis and optimization module is used to conduct in-depth analysis of the original data provided by the basic data acquisition module, identify the differences between the original ship structure and the design requirements, and distribute the deviations to each module through the optimization algorithm to reduce the cumulative error and ensure the perfect fit between the new module and the original ship structure; The positioning pole and coordinate network establishment module is designed to set up a series of positioning poles in the main deck area through precise measurement and positioning, and mark accurate coordinate information on them, so as to form a coordinate network covering the entire ship. This network will provide a reliable reference benchmark for subsequent structural module loading, positioning and ship deformation monitoring; The coordinate network verification and optimization is aimed at selecting some of the benchmarks for repeated measurement, cross-validation, verifying the accuracy of the coordinate measurement, re-measuring the benchmarks with large errors and updating the coordinate information; The data management and visualization module is used to manage the data of the entire measurement system, including basic data, analysis results, positioning data, etc., and provide visual data display.

2. A hull data measurement system for a FPSO converted ship in a floating state as claimed in claim 1, characterized in that: The implementation scheme of the basic data acquisition module includes the following steps: S201. Use a high-precision total station to conduct all-round measurement of the deck area; S202. Record deck rib positions, longitudinals and plane data; S203. Organize and analyze the measurement data to provide a basis for establishing a coordinate network.

3. The hull data measurement system for a FPSO converted ship in a floating state according to claim 1, characterized in that: The specific implementation of the data analysis and optimization module includes the following steps: S301. Data preprocessing: Check the integrity and accuracy of the original data, remove duplicate, invalid and erroneous data, then convert the original data into a format suitable for analysis, and integrate all data provided by the basic data acquisition module to form a complete data set; S302. Deviation analysis: Compare and analyze the original ship data with the design data to identify the differences and deviations between the two. According to the nature and size of the deviations, the deviations are divided into deviations within the acceptable range, deviations that need to be adjusted, and deviations that cannot be adjusted. Statistical and visualization tools are used to display the distribution of deviations on the hull and identify areas and modules with large deviations. S303. Deviation optimization: Based on the results of deviation analysis and the specific requirements of the hull structure and module loading, the deviation is evenly distributed to each module.

4. A hull data measurement system for a FPSO converted ship in a floating state as claimed in claim 3, characterized in that: The data set integrated in the data preprocessing step includes deck rib positions, longitudinal bones and plane dimensions.

5. The hull data measurement system for a FPSO converted ship in a floating state according to claim 1, characterized in that: The implementation steps of the positioning pole and coordinate network establishment module include: S501. Determination of the location of the benchmarks: Design the layout of the coordinate benchmarks according to the hull structure and modification requirements to ensure that the benchmarks are evenly distributed and cover all key measurement areas; S502. Installation of markers: According to the deck area layout and key module location information, mark the installation position of each marker on the hull deck. According to the determined position, use special installation tools to vertically fix the marker on the deck to ensure that the marker is stable, vertical, and easy to observe and measure; S503. Coordinate measurement: Use a total station to accurately measure the top of each pole, determine its three-dimensional coordinates, mark the coordinate information on the pole, and facilitate subsequent data query and analysis. Enter the coordinate information of all poles into the database and draw a coordinate network diagram. The network diagram marks the position and coordinate information of each pole, and facilitates subsequent data query and analysis; S504. Coordinate network verification and optimization: Select some benchmarks for repeated measurement and cross-validation to verify the accuracy of coordinate measurement. Re-measure the benchmarks with large errors and update the coordinate information. According to the verification results, optimize and adjust the coordinate network to ensure the reliability of the entire network.

6. A hull data measurement system for a FPSO converted ship in a floating state as claimed in claim 5, characterized in that: After the position of the benchmark is determined, the deck is surveyed to confirm the feasibility of the benchmark position to avoid conflicts with existing structures and equipment. According to the survey results, the position of the benchmark is adjusted to ensure that the measurement requirements are met and subsequent construction is not affected.

7. The hull data measurement system for a FPSO converted ship in a floating state as claimed in claim 5, characterized in that: In the step S503. of measuring coordinates, when measuring the coordinates of the benchmark, the coordinates of the benchmark are converted from the ship coordinate system to a stable earth coordinate system.

8. The hull data measurement system for a FPSO converted ship in a floating state according to claim 7, characterized in that: The coordinate system conversion comprises the following steps: S801. Determine the common points: First, confirm the coordinates of the three common points in the hull coordinate system and the earth coordinate system. The coordinates of the three common points are as follows: Point 1: Its coordinates in the ship coordinate system are (X1, Y1, Z1), and its coordinates in the earth coordinate system are (x1, y1, z1); Point 2: Its coordinates in the ship coordinate system are (X2, Y2, Z2), and its coordinates in the earth coordinate system are (x2, y2, z2); Point 3: Its coordinates in the ship coordinate system are (X3, Y3, Z3), and its coordinates in the earth coordinate system are (x3, y3, z3); S802. Determine the conversion parameters: The conversion parameters include three rotation parameters R x , R y , R z , are the rotation angles of the hull around the X-axis, Y-axis and Z-axis, and also include three translation parameters T x , T y , T z , which correspond to the translation of the hull in the X, Y, and Z directions respectively. The conversion parameters and translation parameters are derived from the ship's motion state monitoring. There is also a scale parameter μ, which can be set according to the needs. Where the rotation parameter R x , R y , R z Respectively represent the rotation of the hull around the X axis R x Radians, rotation R around the Y axis y Angle, rotation around the Z axis R z angle; The translation parameter T x , T y , T z Respectively represent the translation of the ship body in the X direction T x meters, translate in the Y direction T y meters, translate in Z direction T z rice; The scale parameter μ represents that the earth coordinate system is magnified by μ relative to the ship coordinate system; S803. Construct a rotation matrix: For small angle rotation, the rotation matrix M is: ； Among them, α, β, and γ are the rotation angles around the X-axis, Y-axis, and Z-axis respectively, and α, β, and γ are converted according to the rotation parameters Rx, Ry, and Rz; S804. Apply the conversion formula: For any point X in the ship coordinate system, its coordinate X′ in the earth coordinate system is calculated by the following formula: ； Where μ is the scale parameter, M is the rotation matrix, and a is the translation vector.

9. The hull data measurement system for a FPSO converted ship in a floating state according to claim 1, characterized in that: The specific implementation method of the real-time data tracking and deformation monitoring module includes the following steps: S901. Monitoring point layout and sensor installation: According to the hull structure and deformation characteristics, select reasonable benchmarks on the hull as monitoring point locations, and install displacement sensors and acceleration sensors on the benchmarks; S902. Real-time monitoring: Use sensors to collect displacement data of monitoring points in real time, and transmit the collected displacement data to the data processing center by wireless or wired means to ensure the stability and reliability of data transmission and avoid data loss; S903. Data storage: The deformation data transmitted to the data processing center is stored and managed.

10. The hull data measurement system for a FPSO converted ship in a floating state according to claim 1, characterized in that: The implementation method of the data management and visualization module comprises the following steps: S1001. Data collection and integration: Identify data sources, including real-time monitoring data, historical data, and external data sources, then clean the collected data, remove duplicate, invalid or erroneous data, pre-process the data, convert the format and unify the units, and finally integrate the cleaned data into a unified data warehouse or database to facilitate subsequent data management and analysis; S1002. Data storage and management: Design a reasonable database structure, including data tables, indexes and views, based on data characteristics and requirements, and formulate a data backup strategy to ensure data security and integrity; at the same time, establish a data recovery mechanism to deal with possible data loss or damage, and then control data access based on user roles and permissions to ensure data confidentiality and security; S1003. Data analysis and mining: Build appropriate data analysis models based on business needs, extract valuable information and patterns from massive data, provide support for decision-making, and then verify the analysis results to ensure their accuracy and reliability. Finally, optimize the analysis models and algorithms based on the verification results. S1004. Data visualization design: According to user needs, clarify the visualization goals and content, including hull deformation trends and structural status distribution. According to visualization needs and data characteristics, select visualization tools, including tables, charts, maps and dashboards.

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