A method for accurately locating a sunken ship

Abstract

The invention discloses a method for measuring and positioning the overall salvage of a shipwreck, which belongs to the technical field of shipwreck salvage and can ensure that the position of the shipwreck is within the boundary range of positioning piles, and plays a good role in protecting the original accumulation of the shipwreck and surrounding ruins during the lowering of the arc beam system, thereby ensuring the originality, integrity and safety of the shipwreck ruins.

Description

Technical Field

[0001] The present invention relates to the field of salvage technology, and in particular to a method for accurately locating a sunken ship. Background Art

[0002] For the traditional location of shipwrecks, divers are generally required to conduct underwater exploration during effective tides and scan the survey area with equipment such as multi-beam systems and shallow-sediment profilers. However, the measurement results of the above methods are relatively vague and cannot accurately locate the position of the shipwreck. Salvage operations may pose the risk of collision, disturbance, and damage to the shipwreck, so traditional measurement and positioning methods cannot ensure the safety and integrity of the shipwreck. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for accurately locating a sunken ship, which effectively reduces the amount of diving operations, is less affected by water flow, achieves real-time monitoring, accurately locates the position of the sunken ship, and avoids the risk of disturbance and damage to the sunken ship by salvage operations.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for accurately locating a sunken ship, comprising the following steps:

[0005] (1) Before construction, first clear the sandbags and other debris near the shipwreck, use multi-beam and three-dimensional stratigraphic profile imaging sonar measurement equipment to determine the boundary of the shipwreck, use a small survey ship to install instruments and equipment, and conduct multi-beam and three-dimensional stratigraphic profile imaging sonar measurements on the shipwreck area to preliminarily determine the location and shape of the shipwreck. Use a multi-beam bathymetric system to conduct water depth and topographic measurements on the terrain around the shipwreck area to determine the underwater terrain and landform conditions around the shipwreck area;

[0006] (2) Based on the shipwreck location map obtained by multi-beam and three-dimensional stratigraphic profile imaging sonar measurements, two positioning auxiliary frames were placed on the flat sea surface at a certain distance from the bow and stern of the shipwreck. High-precision satellite station differential signal dual-antenna DGPS and inclinometer were used to accurately locate the two positioning auxiliary frames at the bow and stern of the shipwreck, and the absolute plane positions of the two positioning auxiliary frames were determined.

[0007] (3) After the two positioning auxiliary frames are installed, a multi-beam echo sounder is used to fix the instrument and equipment on the side of the on-site construction vessel to conduct a detailed scan of the shipwreck area again to find out the relative position of the shipwreck and the two positioning auxiliary frames, and determine the exposed range of the shipwreck and the surrounding terrain;

[0008] (4) For surface positioning of construction vessels, high-precision differential DGPS system and navigation positioning software are used for positioning and orientation display. For installation and positioning of positioning piles, high-precision differential DGPS system and navigation positioning software are used for real-time display of positioning and orientation of positioning piles at the top of the crane of the construction vessel.

[0009] (5) After the positioning piles are driven, temporary positioning pile platforms are set up on the positioning piles. RTK is used to further re-measure the final positions of the positioning piles after installation. At the same time, a total station is set up on the small platform of the positioning auxiliary frame above the positioning auxiliary frame to accurately measure the relative positions of the four positioning piles, confirming that the sunken ship is within the safety protection range, which serves as an important basis for the positioning of the sunken ship salvage operation.

[0010] By adopting the technical solution of the present invention, the following beneficial effects can be obtained:

[0011] The shipwreck precise positioning method of the present invention can ensure that the position of the shipwreck is within the boundary range of the positioning piles, and plays a good role in protecting the original accumulation of the shipwreck and surrounding ruins during the lowering of the arc beam system, thereby ensuring the originality, integrity and safety of the shipwreck ruins. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following is a brief description of the contents and symbols in the drawings of this specification:

[0013] Figure 1 This is a schematic diagram of the structure of the shipwreck precise positioning device;

[0014] The markings in the above figures are: 1. Positioning auxiliary frame; 2. Positioning piles; 3. Positioning pile temporary platform; 4. Positioning auxiliary frame small platform; 5. Salvage frame. DETAILED DESCRIPTION

[0015] The following is a detailed description of the embodiments of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, etc., with reference to the accompanying drawings.

[0016] like Figure 1 As shown, a positioning auxiliary frame small platform 4 is preset on the positioning auxiliary frame 1, and a measuring instrument is set up on the positioning auxiliary frame small platform 4. The instrument monitors the position, inclination and elevation of the positioning pile 2 to ensure that the mud position, verticality and mud depth of the positioning pile 2 meet the design requirements. A positioning pile temporary platform 3 is set on the positioning pile 2, and the final position is further re-measured using RTK.

[0017] The method for accurately locating a sunken ship comprises the following steps:

[0018] (1) Before construction, first clear the sandbags and other debris near the shipwreck, use multi-beam and three-dimensional stratigraphic profile imaging sonar measurement equipment to determine the boundary of the shipwreck, use a small survey ship to install instruments and equipment, and conduct multi-beam and three-dimensional stratigraphic profile imaging sonar measurements on the shipwreck area to preliminarily determine the location and shape of the shipwreck. Use a multi-beam bathymetric system to conduct water depth and topographic measurements on the terrain around the shipwreck area to determine the underwater terrain and landform conditions around the shipwreck area;

[0019] (2) Based on the shipwreck position map obtained by multi-beam and three-dimensional stratigraphic profile imaging sonar measurements, positioning auxiliary frames 1 were placed on the flat sea surface at a certain distance from the bow and stern of the shipwreck. High-precision satellite station differential signal dual-antenna DGPS and inclinometer were used to accurately locate the two positioning auxiliary frames at the bow and stern of the shipwreck, and the absolute plane positions of the two positioning auxiliary frames 1 were determined.

[0020] (3) After the two positioning auxiliary frames 1 are installed, a multi-beam echo sounder is used, and the equipment is fixed on the side of the on-site construction vessel to conduct a detailed scan of the shipwreck area again to find out the relative position of the shipwreck and the two positioning auxiliary frames 1, and determine the exposed range of the shipwreck and the surrounding terrain;

[0021] (4) For surface positioning of the construction vessel, a high-precision differential DGPS system and navigation positioning software are used for positioning and orientation display. Positioning pile 2 is installed and positioned. At the top of the construction vessel crane, a high-precision differential DGPS system and navigation positioning software are used for real-time display of the positioning and orientation of positioning pile 2.

[0022] (5) After the positioning piles 2 are driven, temporary positioning pile platforms 3 are set up on the positioning piles 2. RTK is used to further re-measure the final positions of the positioning piles 2 after installation. At the same time, a total station is set up on the positioning auxiliary frame small platform 4 above the positioning auxiliary frame 1 to accurately measure the relative positions of the four positioning piles 2, confirming that the sunken ship is within the safety protection range, which serves as an important basis for the positioning of the sunken ship salvage operation.

[0023] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for accurately locating a sunken ship, characterized in that: The following steps are involved: (1) Before construction, first clear the sandbags and other debris near the shipwreck, use multi-beam and three-dimensional stratigraphic profile imaging sonar measurement equipment to determine the boundary of the shipwreck, use a small survey ship to install instruments and equipment, and conduct multi-beam and three-dimensional stratigraphic profile imaging sonar measurements on the shipwreck area to preliminarily determine the location and shape of the shipwreck. Use a multi-beam bathymetric system to conduct water depth and topographic measurements on the terrain around the shipwreck area to determine the underwater terrain and landform conditions around the shipwreck area; (2) Based on the shipwreck position map obtained by multi-beam and three-dimensional stratigraphic profile imaging sonar measurements, positioning auxiliary frames (1) are placed on the flat sea surface at a certain distance from the bow and stern of the shipwreck. High-precision satellite station differential signal dual-antenna DGPS and inclinometer are used to accurately locate the two positioning auxiliary frames at the bow and stern of the shipwreck, and the absolute plane positions of the two positioning auxiliary frames (1) are determined; (3) After the two positioning auxiliary frames (1) are installed, a multi-beam echo sounder is used, and the equipment is fixed on the side of the construction vessel on site to conduct a detailed scan of the shipwreck area again to find out the relative position of the shipwreck and the two positioning auxiliary frames (1), and determine the exposed range of the shipwreck and the surrounding terrain; (4) Surface positioning of the construction vessel, using a high-precision differential DGPS system and navigation positioning software for positioning and orientation display, positioning pile (2) installation positioning, at the top of the construction vessel crane, using a high-precision differential DGPS system and navigation positioning software for positioning pile (2) positioning and orientation real-time display; (5) After the positioning piles (2) are driven, temporary positioning pile platforms (3) are set up on the positioning piles (2) and RTK is used to further re-measure the final positions of the positioning piles (2) after installation. At the same time, a total station is set up on the positioning auxiliary frame small platform (4) above the positioning auxiliary frame (1) to accurately measure the relative positions of the four positioning piles (2) to determine that the sunken ship is within the safety protection range, which serves as an important basis for the positioning of the sunken ship salvage operation.

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