Ship base levelness measurement method and system and storage medium
Through high-precision electronic inclinometer and differential measurement principle, the problems of low accuracy and low efficiency in ship base level measurement technology are solved, and portability and efficient measurement solutions are provided, which improves the overall efficiency of ship construction.
Patent Information
- Application Number
- CN202411270420.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2024-12-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing ship base level measurement technology has problems of low accuracy, low efficiency and poor portability, which is difficult to meet the strict requirements of the modern ship industry for base level, and the operation is cumbersome, which affects the overall efficiency of ship construction.
High-precision electronic inclinometer is used as a measurement sensor, combining the differential measurement principle and optimized data processing algorithm, and automatically collect and process data, directly calculate and display the average value of the difference, providing portability and efficient measurement solutions.
It improves the accuracy and efficiency of ship base level measurement, shortens the measurement time, ensures the stability of ship structure and the accuracy of equipment installation, and enhances the efficiency of ship construction process.
Smart Images

Figure CN119124105A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of foundation level measurement, and in particular to a method, system and storage medium for measuring the level of a ship foundation. Background Art
[0002] With the rapid development of the shipbuilding industry, the importance of foundation level measurement technology in the shipbuilding process has become increasingly prominent. As an important part of the ship, the level of the foundation is directly related to the stability of the overall structure of the ship and the reliability of equipment operation. In the field of ship foundation level measurement, the existing technologies mainly include imported electronic level measurement systems and traditional mechanical and electronic measuring tools. Although these technologies can achieve the measurement of foundation level to a certain extent, they have the following limitations:
[0003] Accuracy problem: Traditional methods have low accuracy and are difficult to meet the strict requirements of the modern shipbuilding industry for the horizontality of the foundation;
[0004] Efficiency issues: Traditional measurement methods and electronic measurement tools usually take a long time to complete the horizontal measurement of the base, and the operation process is relatively cumbersome. Although electronic measurement tools are faster than traditional mechanical tools, they still have slow data processing speeds, which makes it difficult to significantly improve measurement efficiency, affecting the overall efficiency of ship construction.
[0005] Portability and ease of use: Existing technical equipment is bulky and heavy, which is not conducive to on-site operation and carrying. At the same time, the operation interface and operation process are not user-friendly enough, and it is impossible to directly obtain the difference between the two base levels and the average value of the difference. Users need to spend extra time and energy to calculate by themselves, which increases the difficulty of use and further reduces the measurement efficiency. Summary of the invention
[0006] The present invention provides a method, system and storage medium for measuring the level of a ship foundation, so as to shorten the measurement time, improve the accuracy and efficiency of the foundation level measurement during the ship construction process, and thus improve the efficiency of the ship construction.
[0007] The present invention provides a ship base level measurement method, which is applied to a ship base level measurement system. The ship base level measurement system comprises: a first measurement sensor, a second measurement sensor and a working host; the working host is connected to the first measurement sensor and the second measurement sensor respectively;
[0008] The method comprises:
[0009] Using a first measuring sensor to measure the horizontality of the ship reference platform to obtain first measurement data;
[0010] Using a second measuring sensor to measure the levelness of the system equipment base to obtain second measurement data;
[0011] Using a working host computer, according to the first measurement data and the second measurement data, to calculate a difference value between the ship reference platform and the system equipment base;
[0012] A measurement report is generated according to the difference value.
[0013] Furthermore, the first measurement sensor is used to measure the horizontality of the ship reference platform to obtain the first measurement data, specifically:
[0014] Select the preset first measuring point on the rotating platform of the ship's reference platform;
[0015] A first measurement point is sampled using a first measurement sensor to obtain first measurement data.
[0016] Furthermore, the second measuring sensor is used to measure the levelness of the system equipment base to obtain the second measurement data, specifically:
[0017] Select the preset second measuring point on the rotating platform of the system equipment base;
[0018] Using a second measurement sensor to sample the second measurement point to obtain second measurement data;
[0019] The first measuring point and the second measuring point are the same or different measuring points.
[0020] Furthermore, the first measuring sensor is an electronic inclinometer.
[0021] Furthermore, the second measuring sensor is an electronic inclinometer.
[0022] Further, the working host is connected to the first measuring sensor and the second measuring sensor respectively, specifically:
[0023] The first measuring sensor is connected to the working host via a wired or wireless method;
[0024] The second measuring sensor is connected to the working host via a wired or wireless method.
[0025] Further, after the first measurement sensor is used to measure the levelness of the ship reference platform to obtain the first measurement data, and the second measurement sensor is used to measure the levelness of the system equipment base to obtain the second measurement data, the method further includes:
[0026] Controlling the first measurement sensor to send first measurement data and a corresponding first measurement time to the working host;
[0027] The second measuring sensor is controlled to send the second measuring data and the corresponding second measuring time to the working host.
[0028] Furthermore, after calculating the difference value between the ship reference platform and the system equipment base according to the first measurement data and the second measurement data using the working host, the method further includes:
[0029] Controlling the working host to send the second measurement data and the differential value to the first measurement sensor, so that the first measurement sensor displays the first measurement data, the second measurement data and the differential value on a display;
[0030] The control working host sends the first measurement data and the differential value to the second measurement sensor, so that the second measurement sensor displays the first measurement data, the second measurement data and the differential value on the display.
[0031] As a preferred solution, the present invention adopts a high-precision sensor, which can accurately capture the horizontal changes of the base and provide high-precision measurement results. In terms of data processing, the present invention introduces the differential measurement principle and optimizes the data processing algorithm, and has a high degree of automation, can automatically perform data acquisition, two base level values and difference processing, and can directly calculate and display the average value of the difference, without the need for users to calculate by themselves, and has the function of exporting data Excel tables, which solves the problems of low precision and low efficiency in traditional base level measurement methods, and provides a higher precision and higher efficiency level measurement solution. The high-precision sensor and data processing device used in the present invention do not require external power supply, are designed to be light and portable, and are convenient for operators to perform rapid measurements on site. These measures jointly ensure the stability of the ship structure and the accuracy of equipment installation, shorten the measurement time, improve the accuracy and efficiency of base level measurement during ship construction, and thus improve the efficiency of ship construction.
[0032] Correspondingly, the present invention also provides a ship base level measurement system, comprising: a first measurement sensor, a second measurement sensor and a working host; the working host is connected to the first measurement sensor and the second measurement sensor respectively;
[0033] The first measurement sensor is used to measure the levelness of the ship reference platform to obtain first measurement data;
[0034] The second measuring sensor is used to measure the levelness of the system equipment base to obtain second measurement data;
[0035] The working host is used to calculate the difference value between the ship reference platform and the system equipment base according to the first measurement data and the second measurement data;
[0036] A measurement report is generated according to the difference value.
[0037] Correspondingly, the present invention also provides a computer-readable storage medium, which includes a stored computer program; wherein, when the computer program is running, it controls the device where the computer-readable storage medium is located to execute a ship base level measurement method as described in the content of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Figure 1 It is a flow chart of an embodiment of a method for measuring the level of a ship base provided by the present invention;
[0039] Figure 2 It is a structural schematic diagram of an embodiment of a ship base level measurement system provided by the present invention. DETAILED DESCRIPTION
[0040] 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.
[0041] Embodiment 1
[0042] A ship base level measurement method provided in an embodiment of the present invention can be used in conjunction with floating and static joint adjustment and calibration repair tooling equipment for ship equipment, and is mainly used for platform level adjustment, inspection and verification during the joint adjustment and precision calibration of ship navigation and weapon systems.
[0043] Please refer to Figure 1 , a ship base level measurement method provided by an embodiment of the present invention is applied to a ship base level measurement system, the ship base level measurement system comprising: a first measurement sensor, a second measurement sensor and a working host; the working host is connected to the first measurement sensor and the second measurement sensor respectively;
[0044] The method comprises steps S101-S103:
[0045] Step S101: using a first measuring sensor to measure the levelness of a ship reference platform to obtain first measurement data;
[0046] Step S102: using a second measuring sensor to measure the levelness of the system equipment base to obtain second measurement data;
[0047] Furthermore, the first measuring sensor is an electronic inclinometer.
[0048] Furthermore, the second measuring sensor is an electronic inclinometer.
[0049] In this embodiment, the electronic inclinometer is used to measure the levelness of the placement position in real time, and has display and setting functions. It can be used as a measuring tool alone to measure the levelness, and the horizontal position accuracy can reach 2" (0.01mm / m).
[0050] The present invention adopts a high-precision sensor, which can accurately capture the level change of the base and provide a high-precision measurement result. This high-precision sensor has stronger adaptability to the external environment and can reduce the influence of factors such as temperature and vibration on the measurement accuracy.
[0051] Further, the working host is connected to the first measuring sensor and the second measuring sensor respectively, specifically:
[0052] The first measuring sensor is connected to the working host via a wired or wireless method;
[0053] The second measuring sensor is connected to the working host via a wired or wireless method.
[0054] In this embodiment, the electronic inclinometers and the electronic inclinometers and the working host are mainly connected by measuring cables, and also have the function of wireless connection.
[0055] Furthermore, the first measurement sensor is used to measure the horizontality of the ship reference platform to obtain the first measurement data, specifically:
[0056] Select the preset first measuring point on the rotating platform of the ship's reference platform;
[0057] A first measurement point is sampled using a first measurement sensor to obtain first measurement data.
[0058] Furthermore, the second measuring sensor is used to measure the levelness of the system equipment base to obtain the second measurement data, specifically:
[0059] Select the preset second measuring point on the rotating platform of the system equipment base;
[0060] Using a second measurement sensor to sample the second measurement point to obtain second measurement data;
[0061] The first measuring point and the second measuring point are the same or different measuring points.
[0062] Optionally, the number of the first measuring points or the second measuring points can be selected from 4 points [0°(360°), 90°, 180°, 270°], 8 points [0°(360°), 45°, 90°, 135°, 180°, 220°, 270°, 315°] and 12 points [0°(360°), 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°].
[0063] After selecting the number of points, the electronic inclinometer will sample these sampling points one by one. Because the sampling speed is very fast and there will be no delay, sampling multiple sampling points separately can obtain more accurate horizontal data.
[0064] At the same time, the ship base level measurement system also includes: a wired intercom telephone, which performs real-time communication and coordination between the remote high-precision electronic inclinometer and the host end during the measurement process, and the wired telephone cable is used together with the measurement cable.
[0065] Step S103: using a working host to calculate a difference value between the ship reference platform and the system equipment base according to the first measurement data and the second measurement data;
[0066] Further, after the first measurement sensor is used to measure the levelness of the ship reference platform to obtain the first measurement data, and the second measurement sensor is used to measure the levelness of the system equipment base to obtain the second measurement data, the method further includes:
[0067] Controlling the first measurement sensor to send first measurement data and a corresponding first measurement time to the working host;
[0068] The second measuring sensor is controlled to send the second measuring data and the corresponding second measuring time to the working host.
[0069] Furthermore, the working host computer performs differential calculation based on the first measurement data and the second measurement data to obtain the difference between the two planes, and then the average value can be calculated based on the difference to calculate the horizontality of the two planes, so that the data is more accurate.
[0070] Furthermore, after calculating the difference value between the ship reference platform and the system equipment base according to the first measurement data and the second measurement data using the working host, the method further includes:
[0071] Controlling the working host to send the second measurement data and the differential value to the first measurement sensor, so that the first measurement sensor displays the first measurement data, the second measurement data and the differential value on a display;
[0072] The control working host sends the first measurement data and the differential value to the second measurement sensor, so that the second measurement sensor displays the first measurement data, the second measurement data and the differential value on the display.
[0073] Step S104: Generate a measurement report according to the differential value.
[0074] In this embodiment, the working host can output and print a measurement report in the form of a template. According to the report, the actual working status and working effect of the ship can be judged, as well as whether the equipment has faults or performance abnormalities. The relevant equipment can also be adjusted and optimized according to the measurement report.
[0075] Implementing the embodiments of the present invention has the following effects:
[0076] The present invention adopts a high-precision sensor, which can accurately capture the horizontal changes of the base and provide high-precision measurement results. In terms of data processing, the present invention introduces the differential measurement principle and optimizes the data processing algorithm, and has a high degree of automation, can automatically perform data acquisition, two base level values and difference processing, and can directly calculate and display the average value of the difference, without the need for users to calculate by themselves, and has the function of exporting data Excel tables, which solves the problems of low precision and low efficiency in traditional base level measurement methods, and provides a higher precision and higher efficiency level measurement solution. The high-precision sensor and data processing device used in the present invention do not require external power supply, are designed to be light and portable, and are convenient for operators to perform rapid measurements on site. These measures jointly ensure the stability of the ship structure and the accuracy of equipment installation, shorten the measurement time, improve the accuracy and efficiency of base level measurement during ship construction, and thus improve the efficiency of ship construction.
[0077] Embodiment 2
[0078] Please refer to Figure 2 , a ship base level measurement system provided by an embodiment of the present invention includes: a first measurement sensor 201, a second measurement sensor 202 and a working host 203; the working host is connected to the first measurement sensor and the second measurement sensor respectively;
[0079] The first measurement sensor is used to measure the levelness of the ship reference platform to obtain first measurement data;
[0080] The second measuring sensor is used to measure the levelness of the system equipment base to obtain second measurement data;
[0081] The working host is used to calculate the difference value between the ship reference platform and the system equipment base according to the first measurement data and the second measurement data;
[0082] A measurement report is generated according to the difference value.
[0083] The two high-precision electronic inclinometers in this system have display and setting functions and can be used as independent measuring tools to measure the levelness. The horizontal position accuracy can reach 2″ (0.01mm / m).
[0084] The electronic inclinometers are connected to each other and to the working host mainly by measuring cables, but they also have the function of wireless connection.
[0085] The ship base level measurement system also includes: a wired intercom telephone, which is used for real-time communication and coordination between the remote high-precision electronic inclinometer and the host end during the measurement process, and the wired telephone cable is used together with the measurement cable.
[0086] The telephone cable and the measuring cable are retracted and unreeled using a custom cable reel, and the connectors are Lemo connectors.
[0087] This embodiment provides the technical parameters of one of the preferred implementation schemes: the measuring range of the ship base level measuring system is: ±30°; the measuring accuracy is: mm. The measuring range is: 577; the measuring accuracy is: <0.01 (full range).
[0088] Specifically, the technical parameters of the electronic inclinometer include:
[0089] The display unit can be switched between different units such as angle (degrees, degrees: minutes: seconds) and slope (mm / m);
[0090] The numerical unit can be switched between degrees, degrees: minutes. seconds, and millimeters / meters;
[0091] The measurement frequency is not less than 10 times / second;
[0092] Reading stabilization time: <1S;
[0093] Continuous working time: ≥10 hours;
[0094] Working temperature range: -10℃~+70℃;
[0095] The power source is 3.7V rechargeable lithium battery.
[0096] The functions of the electronic inclinometer also include:
[0097] It can be used as a level measurement tool to measure relative and absolute levelness. It has a one-key calibration function for absolute zero and relative zero. Zero calibration can eliminate the effects of temperature drift, damage and deformation of the equipment base, etc. on measurement accuracy.
[0098] The steps for turning on and off the high-precision electronic inclinometer (measuring sensor) are as follows: short press the "power key" once to turn on the instrument. After turning on, the instrument will perform a self-check and display the measurement data; press and hold the "power key" for about 2 seconds, the display screen will go out, release the power key, and the instrument will turn off; when the battery power is too low, the instrument will automatically turn off.
[0099] Before measuring, the electronic inclinometer should be calibrated to absolute zero: place the instrument on a stable and nearly horizontal platform, press the "ABS" key once after the reading is stable, and a "ZERO" key will appear on the screen. Press it again to complete the absolute zero calibration. This calibration step can be performed at any time during the measurement process.
[0100] The electronic inclinometer is placed on the workpiece to be measured, and the workpiece is adjusted to the corresponding reading of the instrument to complete the horizontal position adjustment of the working surface.
[0101] The parallelism error is generally determined by the minimum condition, using the directional minimum area to contain the actual element being measured and the reference element to be parallel. The instrument continuously measures the actual reference surface and the measured surface to obtain the parallelism error.
[0102] Work host features also include:
[0103] Can solve the measurement difference between two sensors in real time;
[0104] Real-time display of measurement data of high-precision electronic inclinometer A, high-precision electronic inclinometer B, and AB;
[0105] Measurement data display unit: can be switched between degrees, degrees: minutes: seconds, mm / m;
[0106] Equipped with real-time dynamic curve chart;
[0107] The sampling time and sampling frequency can be set;
[0108] A measurement report can be generated, and the measurement unit, personnel, time, etc. in the report can be edited;
[0109] Data can be saved and exported in EXCEL format.
[0110] Able to record and store measurement time and measurement data, and output in template report form;
[0111] Optionally, the host can be a customized reinforced portable host, the chassis is made of aluminum alloy, and has the functions of waterproof, dustproof, high and low temperature resistance, anti-interference, etc.; Intel I7 processor, equipped with network port, serial port, USB and other interfaces; the display screen is a 14-inch LCD screen; weight: 1.48kg; built-in electronic differential high-precision electronic inclinometer measurement software.
[0112] The above-mentioned ship base level measurement system can implement the ship base level measurement method of the above-mentioned method embodiment. The options in the above-mentioned method embodiment are also applicable to this embodiment and will not be described in detail here. The rest of the contents of the embodiment of this application can refer to the contents of the above-mentioned method embodiment, and will not be repeated in this embodiment.
[0113] Embodiment 3
[0114] Correspondingly, the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the ship base level measurement method described in any one of the above embodiments.
[0115] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program in the terminal device.
[0116] The terminal device may be a computing device such as a desktop computer, a notebook, a palmtop computer, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.
[0117] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.
[0118] The memory can be used to store the computer program and / or module, and the processor realizes various functions of the terminal device by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created according to the use of the mobile terminal, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Med ia Card, SMC), a secure digital (SecureDi gita l, SD) card, a flash card (F l ash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.
[0119] Wherein, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.
[0120] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims
1. A method for measuring the level of a ship foundation, characterized in that: Applied to a ship base level measurement system, the ship base level measurement system comprises: a first measurement sensor, a second measurement sensor and a working host; the working host is connected to the first measurement sensor and the second measurement sensor respectively; The method comprises: Using a first measuring sensor to measure the horizontality of the ship reference platform to obtain first measurement data; Using a second measuring sensor to measure the levelness of the system equipment base to obtain second measurement data; Using a working host computer, according to the first measurement data and the second measurement data, to calculate a difference value between the ship reference platform and the system equipment base; A measurement report is generated according to the difference value.
2. A method for measuring the level of a ship foundation according to claim 1, characterized in that: The first measurement sensor is used to measure the horizontality of the ship reference platform to obtain the first measurement data, specifically: Select the preset first measuring point on the rotating platform of the ship's reference platform; A first measurement point is sampled using a first measurement sensor to obtain first measurement data.
3. A method for measuring the level of a ship foundation as claimed in claim 2, characterized in that: The second measurement sensor is used to measure the levelness of the system equipment base to obtain the second measurement data, specifically: Select the preset second measuring point on the rotating platform of the system equipment base; Using a second measurement sensor to sample the second measurement point to obtain second measurement data; The first measuring point and the second measuring point are the same or different measuring points.
4. A method for measuring the level of a ship foundation as claimed in claim 1, characterized in that: The first measuring sensor is an electronic inclinometer.
5. A method for measuring the level of a ship foundation according to claim 1, characterized in that: The second measuring sensor is an electronic inclinometer.
6. A method for measuring the level of a ship foundation according to any one of claims 4 to 5, characterized in that: The working host is connected to the first measuring sensor and the second measuring sensor respectively, specifically: The first measuring sensor is connected to the working host via a wired or wireless method; The second measuring sensor is connected to the working host via a wired or wireless method.
7. A method for measuring the level of a ship foundation according to claim 1, characterized in that: After the first measurement sensor is used to measure the levelness of the ship reference platform to obtain the first measurement data, and the second measurement sensor is used to measure the levelness of the system equipment base to obtain the second measurement data, the method further includes: Controlling the first measurement sensor to send first measurement data and a corresponding first measurement time to the working host; The second measuring sensor is controlled to send the second measuring data and the corresponding second measuring time to the working host.
8. A method for measuring the level of a ship foundation as claimed in claim 1, characterized in that: After the working host calculates the difference between the ship reference platform and the system equipment base according to the first measurement data and the second measurement data, the method further includes: Controlling the working host to send the second measurement data and the differential value to the first measurement sensor, so that the first measurement sensor displays the first measurement data, the second measurement data and the differential value on a display; The control working host sends the first measurement data and the differential value to the second measurement sensor, so that the second measurement sensor displays the first measurement data, the second measurement data and the differential value on the display.
9. A ship base level measurement system, characterized in that: include: A first measuring sensor, a second measuring sensor and a working host; the working host is connected to the first measuring sensor and the second measuring sensor respectively; The first measurement sensor is used to measure the levelness of the ship reference platform to obtain first measurement data; The second measuring sensor is used to measure the levelness of the system equipment base to obtain second measurement data; The working host is used to calculate the difference value between the ship reference platform and the system equipment base according to the first measurement data and the second measurement data; A measurement report is generated according to the difference value.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program; wherein, when the computer program is run, it controls the device where the computer-readable storage medium is located to execute a method for measuring the level of a ship base as described in any one of claims 1 to 8.
Citation Information
Patent Citations
Dynamic real-time precise level measurement method of moving carrier
CN101696880A
Intelligent compensation system for geometrical and heating position errors of numerical control machine
CN102629121A
Ship foundation support levelness automatic measuring device
CN104655103A
Ship-pedestal-levelness measuring system in mooring condition
CN105486281A
Ship special equipment levelness measuring method
CN109458987A
Cited By
Hull base levelness measuring device and measured data processing method
CN120426961A
