CN-121994410-A - Gravity center static detection device and method for ultra-large ship segments

CN121994410ACN 121994410 ACN121994410 ACN 121994410ACN-121994410-A

Abstract

The invention belongs to the technical field of ship inspection, and particularly relates to a gravity center static detection device and method for ultra-large ship segments, wherein the device comprises the following steps: the system comprises a heavy-duty hydraulic lifting system, a pose adjusting platform, a triaxial inclination angle sensor, a pressure sensor, a laser displacement sensor, a weighing module, an ultra-wideband positioning system and the like. The method adopts a distributed measurement mode, and the supporting force, the space position and the inclination angle data of each supporting point are synchronously acquired by introducing accurate and controllable inclined supporting force, so that the barycenter coordinates of the ship segments in the three-dimensional space are comprehensively solved, and the problem that the barycenter height of the ultra-large ship segments is difficult to accurately measure is solved. The multi-detection device is distributed, can flexibly adapt to ship segments with different sizes, effectively reduces systematic errors and random errors, and remarkably improves detection precision.

Inventors

CHEN NING
WEN ZHICHAO
LI JUNWEI
GAO ZHENHAO
DUAN ZHIYUAN

Assignees

山东科技大学

Dates

Publication Date: 20260508
Application Date: 20260304

Claims (10)

1. A static detection device for the center of gravity of a segment of an oversized vessel, comprising: the heavy-load hydraulic lifting system is used for bearing the structural load of the ship section and ensuring the non-interference vertical lifting of the ship section through vertical supporting force; The pose adjusting platform comprises a Hooke hinge and six hydraulic cylinders, is used for realizing flexible rotation of the supporting panel around an X axis and a Y axis, enables the supporting panel to be in stable contact with arc surfaces on two sides of a ship section by adjusting the inclination angle of the pose adjusting platform, and provides an inclined load for a mechanical calculation model for positioning the gravity center height of the ship; The three-axis inclination sensor is fixed on the lower surface of the pose adjustment platform and is used for measuring the inclination angle of the support panel of the pose adjustment platform in a three-dimensional space and providing the inclination direction of the inclined load in the space; The pressure sensors are distributed on the surface of the support panel of the pose adjustment platform in a 120-degree phase equiangular configuration and are used for controlling the inclination angle of the pose adjustment platform in a feedback manner and collecting the inclined supporting force of the support panel; the laser displacement sensor is arranged below the heavy-duty hydraulic platform at one side of the heavy-duty hydraulic lifting system and is used for measuring lifting displacement of the hydraulic cylinder.
2. The ultra-wideband positioning system is arranged on the surface of the gravity center static detection device, and is used for measuring the position of a single static detection device in a horizontal space and providing position coordinates of a supporting point for gravity calculation through direct positioning of a plurality of base stations and auxiliary positioning among a plurality of static detection devices.
3. The ultra-wideband positioning system is cooperated with a laser displacement sensor and used for collecting and sharing the space coordinates of each supporting point, the pressure sensor is cooperated with a weighing module and used for measuring and sharing the load of each supporting point, the triaxial inclination sensor is used for obtaining and sharing the direction information of the load at each supporting point, and the data together form a complete data set required by calculating the three-dimensional coordinates of the center of gravity of the ship section.
4. The static gravity center detection device for ultra-large ship segments as claimed in claim 1, wherein the pose adjustment platform is connected with the heavy-duty hydraulic platform through a flange, and the pose adjustment platform is installed or detached according to the arrangement position requirement of the gravity center detection system.
5. A static center of gravity detection device for a oversized vessel section as claimed in claim 1 wherein the static center of gravity detection device is disposed in a distributed arrangement beneath the bottom of the vessel section and the cambered surfaces on both sides of the vessel section.
6. A static center of gravity detection device for ultra-large ship segments as claimed in claim 5, wherein the center of gravity detection devices distributed at the bottom of the ship segments are not provided with said posture adjustment platform for carrying the weight of the ship segments and providing a supporting force in the vertical direction.
7. A static center of gravity detection device for ultra-large ship segments as claimed in claim 5, wherein the center of gravity detection means distributed under the cambered surface of the ship segments is provided with a posture adjustment platform for providing an oblique supporting force required for calculating the height of the center of gravity of the ship segments.
8. A gravity center static detection method of a super large ship section, using a gravity center static detection device of a super large ship section according to any one of claims 1 to 7, characterized by comprising: the position of the gravity center static detection device is adjusted, the gravity center static detection devices without the attitude adjustment platform are distributed at the bottom of the ship section, and the gravity center static detection devices with the attitude adjustment platform are arranged at two sides of the ship section with a slight radian; The position coordinates of the centers of the supporting surfaces of the gravity center static detection devices are obtained through an ultra-wideband positioning technology and a laser ranging sensor; the gravity center static detection device of the second assembly coordination posture adjustment platform on two sides of the ship section is controlled to synchronously lift, and the pressure sensor is matched with the weighing module to measure the inclined and vertical supporting force of each supporting point; And (3) constructing an equation set of the ship segments according to moment balance, calculating the barycentric coordinates of the ship segments on an XY plane and the barycentric height Z of the ship segments, and finishing barycentric static detection of the ultra-large ship segments.
9. The static detection method for the center of gravity of the ultra-large ship section according to claim 8, wherein before calculating the height of the center of gravity of the ship section, the static detection devices for the center of gravity of the assembly pose adjustment platforms distributed on two sides of the ship section are controlled to be lifted synchronously, the ship section is jacked up by cooperating with the static detection devices for the center of gravity of the non-assembly pose adjustment platforms, and the inclination angle of the panel is supported by adjusting the static detection devices for the center of gravity of the assembly pose adjustment platforms, so that the pressure values of three pressure sensors on the panel are the same, and the magnitude and the azimuth angle of the oblique supporting force perpendicular to the contact surface are ensured.
10. The static detection method for the center of gravity of the ultra-large ship section according to claim 8, wherein the oblique supporting force with determined size and direction is introduced on the basis of the vertical supporting force, and the three-dimensional coordinate of the center of gravity of the ship section in space can be obtained by static measurement without tilting or suspending the ship section; In the process of measuring the three-dimensional gravity center of the ship section, a plurality of gravity center detection devices are distributed, and the number of the devices is flexibly increased and decreased according to the size of the ship section so as to adapt to the gravity center measurement requirement of the ultra-large ship section.

Description

Gravity center static detection device and method for ultra-large ship segments Technical Field The invention belongs to the technical field of ship inspection, and particularly relates to a gravity center static detection device and method for ultra-large ship segments. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. The detection of the center of gravity of a ship segment in space, particularly the measurement of the height of the center of gravity, has been a detection problem in the industry. The existing common gravity center detection methods, such as a suspension method, a turnover weighing method and a three-point support weighing method, generally need to change the position and the posture of a detected object to obtain the accurate gravity center coordinates of the detected object in space, and meanwhile, the methods are only suitable for the gravity center measurement of small objects, and for ultra-large ship sections, important safety risks such as sling breakage, ship body overturning and the like easily occur in the suspension or tilting process. Therefore, it is difficult to safely and accurately determine the three-dimensional center of gravity of the ship segment in a suspended or inclined manner. In the prior art, one end of a small ship is lifted by a crane, and the gravity center of the ship is calculated through a moment balance equation, but the method is only suitable for detecting the gravity center of the small ship, and large ship segments are difficult to detect through a suspension method. In the prior art, the center of gravity of the ship can be calculated by jacking and tilting the ship through 4 tool platforms, however, the ship still needs to be tilted by the measuring device and the measuring method, a certain overturning risk exists, and the measuring result is easily influenced by systematic errors and random errors due to the fact that only four tool platforms are used, and the center of gravity measurement of the ultra-large ship section is difficult to implement. The gravity center detection test bed of the small-sized working machine is researched by related scholars, the movement of the detection platform is realized through the lifting mechanisms with three supporting points, the platform is in a horizontal state in the measuring process, the initial position of a measured object is measured and calculated, the platform is inclined by a certain angle, the vertical coordinate of the gravity center is calculated, the three-dimensional coordinate of the gravity center is obtained, in the using process, the object is required to be inclined, the test platform is only suitable for the gravity center detection of small-sized equipment, and the large-sized ship subsection is difficult to build on the test platform with enough size. Disclosure of Invention In order to solve the problems, the invention provides a gravity center static detection device and a gravity center static detection method for a super-large ship section, which can accurately obtain the space gravity center position of the super-large ship section without inclining or suspending the ship section by introducing accurate and controllable oblique supporting force, and can increase and decrease the number of measuring equipment according to the sizes of different ship sections so as to meet the measurement requirements of the ship sections with different sizes. According to some embodiments, the first scheme of the invention provides a gravity center static detection device for ultra-large ship segments, which adopts the following technical scheme: a static center of gravity detection device for ultra-large ship segments, comprising: the heavy-load hydraulic lifting system is used for bearing the structural load of the ship section and ensuring the non-interference vertical lifting of the ship section through vertical supporting force; The support panel is stably contacted with the arc surfaces on two sides of the ship section by adjusting the inclination angle of the pose adjustment platform, so that the direction of supporting force is vertical to the contact surface, and an inclined load is provided for a mechanical calculation model for positioning the gravity center height of the ship; The three-axis inclination sensor is fixed on the lower surface of the pose adjustment platform and is used for measuring the inclination angle of the support panel of the pose adjustment platform in a three-dimensional space and providing the inclination direction of the inclined load in the space; The pressure sensors are distributed on the surface of the support panel of the pose adjustment platform in a 120-degree phase equiangular configuration, the inclination angle of the pose adjustment platform is adjusted through feedback control by adjusting the values of the three pressure sensors to be equal, the