Water topographic surveying and mapping equipment capable of being fixed with ship body

Abstract

The invention discloses water topographic surveying and mapping equipment capable of being fixed with a ship body, and the equipment comprises a dismounting and mounting mechanism which is installed on the side surface of the ship body and is used for realizing the rapid dismounting and mounting of the surveying and mapping equipment, the dismounting and mounting mechanism comprises a mounting seat and a splicing seat, and the four corners of the top of the mounting seat and the four corners of the bottom of the splicing seat are respectively provided with positioning columns and positioning holes. When a splicing seat is pressed downwards, a lock rod in a positioning column pushes a lock catch to be unfolded outwards under the action of a spring, so that the tail end of the F-shaped lock catch is embedded into a groove in the inner wall of a positioning hole of the splicing seat to complete rigid locking and form bolt-free mechanical fixation, and when disassembly is needed, a pull rod outside a mounting seat is pulled to drive a slope-shaped unlocking block to move forwards, so that the lock catch is unlocked. The inclined planes are utilized to extrude the tails of the lock catches to enable the lock catches to contract inwards to be separated from the positioning holes, one-key unlocking is achieved, meanwhile, the lock catch structures distributed at the four corners can evenly disperse hull bumping or water wave impact force, the equipment installation stability is ensured, and equipment deviation or toppling caused by vibration in the surveying and mapping process is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of surveying and mapping equipment, and particularly to a water body topographic surveying and mapping equipment that can be fixed to a hull. Background Art

[0002] A water body topographic surveying and mapping equipment is a high-tech instrument specifically used for detecting and mapping underwater topographies and landforms. It integrates multiple advanced technologies such as sonar technology, satellite positioning systems, data acquisition and processing, etc. By emitting sound waves and receiving their reflected signals, this equipment can accurately measure important information such as water depth, topographic undulations, and obstacle distributions in the water body, and generate detailed underwater topographic maps in real time. This equipment plays an important role in fields such as ocean exploration, waterway monitoring, water conservancy projects, and environmental protection, providing scientific and accurate data bases for relevant decision-making and construction.

[0003] Currently, the connection method of water body topographic surveying and mapping equipment to the hull mainly uses bolt fixation or direct placement. However, bolts are prone to rust due to the influence of a humid environment, which brings inconvenience to disassembly and assembly. At the same time, the directly placed equipment is prone to move and tip over under the impact of water waves, affecting the stability of surveying and mapping. In addition, most equipment lacks an angle adjustment function and can only detect vertically, making it difficult to achieve full-range underwater scanning, resulting in blind spots and accuracy problems in monitoring data, and there is an urgent need for improvement to enhance the performance of the equipment and the effect of surveying and mapping. Summary of the Invention

[0004] An object of the present invention is to provide a water body topographic surveying and mapping equipment that can be fixed to a hull, aiming to solve the problems in the above background, that is, currently, the connection method of water body topographic surveying and mapping equipment to the hull mainly uses bolt fixation or direct placement. However, bolts are prone to rust due to the influence of a humid environment, which brings inconvenience to disassembly and assembly. At the same time, the directly placed equipment is prone to move and tip over under the impact of water waves, affecting the stability of surveying and mapping. In addition, most equipment lacks an angle adjustment function and can only detect vertically, making it difficult to achieve full-range underwater scanning, resulting in blind spots and accuracy problems in monitoring data.

[0005] A water body topographic surveying and mapping equipment that can be fixed to a hull according to an embodiment of the present invention includes:

[0006] A disassembly and assembly mechanism, installed on the side of the hull, for realizing the rapid disassembly and assembly of the surveying and mapping equipment. Among them, the disassembly and assembly mechanism includes a mounting seat and a splicing seat. Positioning columns and positioning holes are respectively provided at the four corners of the top of the mounting seat and the four corners of the bottom of the splicing seat. A locking component for locking the splicing seat is installed inside the mounting seat and the positioning columns, and an unlocking component for releasing the locking component is installed inside the mounting seat.

[0007] The tilt adjustment mechanism is installed on one side of the splicing base in the disassembly and assembly mechanism and is used to automatically adjust the angle according to the hull attitude and water surface fluctuations. Among them, the tilt adjustment mechanism includes a tilt arm, and the tilt arm is rotatably arranged on one side of the splicing base through a first rotating seat. A pushing component for pushing the tilt arm to rotate is installed at the bottom of the splicing base.

[0008] The telescopic angle adjustment mechanism is installed at the bottom end of the tilt arm in the tilt adjustment mechanism and is used to adjust the position of the equipment according to different water depths and surveying requirements. Among them, the telescopic angle adjustment mechanism includes an arched bracket. A circular bracket is fixedly arranged at the bottom of the arched bracket. A screw rod is rotatably arranged inside the circular bracket. A threaded sleeve is arranged on the outer side of the screw rod in a threaded manner. The threaded sleeve realizes telescopic movement through a limiting component. A turntable is rotatably arranged on the outer side of the circular bracket. One side of the bottom of the turntable is symmetrically and fixedly provided with telescopic rods. The movable end of the telescopic rod is fixedly provided with an instrument fixing plate. The screw rod and the turntable realize telescopic or circumferential angle adjustment through a driving component.

[0009] Preferably, the positioning post and the positioning hole are adapted to each other and are arranged in a snap-fit manner.

[0010] Preferably, the locking component includes a lock rod that moves inside the mounting seat and the positioning post. Chutes and push grooves are respectively formed at the upper and lower ends inside the lock rod. A spring is fixedly arranged at the top of the lock rod. A pin for spring limiting is arranged on the top of the positioning post in a threaded manner. Lock catches are rotatably arranged on both sides inside the positioning post through rotating shafts.

[0011] Preferably, the lock catch is of an F-shaped structure. The tail end of the lock catch is movably arranged inside the push groove, and the lock catch is fixedly arranged in a snap-fit manner inside the positioning hole.

[0012] Preferably, the unlocking component includes a sloped unlocking block that is movably arranged inside the mounting seat. A limiting rod is fixedly arranged at the tail end of the sloped unlocking block. A pull rod is fixedly arranged at the tail end of the limiting rod.

[0013] Preferably, the pushing component includes a hydraulic push rod. The hydraulic push rod is rotatably arranged at the bottom of the splicing base through a second rotating seat. The output end of the hydraulic push rod is rotatably provided with a slider, and the slider is movably arranged inside the tilt arm.

[0014] Preferably, the limiting component includes a positioning frame fixed to the bottom of the circular bracket. A guiding cylinder is fixedly arranged inside the positioning frame, and the threaded sleeve is movably arranged inside the guiding cylinder.

[0015] Preferably, the driving assembly includes a first motor and a second motor fixed inside the arch bracket, the output end of the first motor is fixedly provided with a first bevel gear, the outer side of the first bevel gear is meshingly provided with a second bevel gear, the second bevel gear is fixedly provided on the outer side of the screw, and the output end of the second motor is connected to a transmission assembly that drives the turntable to rotate.

[0016] Preferably, the transmission assembly consists of a pulley and a belt, the pulley is fixed to the output end of the second motor, and the belt is located outside the pulley and the turntable.

[0017] Preferably, a surveying instrument is installed at the bottom of the instrument fixing plate, and a telescopic sleeve for protection is installed on the outer side of the arch frame.

[0018] The beneficial effects of the present invention are:

[0019] The present invention effectively avoids the problem that the traditional bolt fixing method is easily affected by the humid environment and rusts, which brings inconvenience to disassembly and assembly. When in use, the mounting seat and the splicing seat in the disassembly and assembly mechanism are quickly docked under the engagement setting of the positioning column and the positioning hole. When the splicing seat is pressed down, the locking rod inside the positioning column pushes the lock buckle to expand outward under the action of the spring, so that the end of the F-shaped lock buckle is embedded in the groove on the inner wall of the splicing seat positioning hole to complete rigid locking, forming a bolt-free mechanical fixation. When disassembly is required, the sloped unlocking block is driven forward by pulling the pull rod outside the mounting seat, and the tail of the lock buckle is squeezed by the inclined surface to make it shrink inward and disengage from the positioning hole, so as to achieve one-key unlocking. At the same time, the lock buckle structures distributed at the four corners can evenly disperse the impact force of the hull bump or water waves, ensure the stability of equipment installation, and prevent the equipment from being offset or tipping over due to vibration during surveying and mapping.

[0020] The tilt adjustment mechanism provided in the present invention effectively avoids the problem of data distortion caused by attitude deviation of traditional fixed-angle equipment in complex waters. When in use, the tilt adjustment mechanism responds to the feedback signal of the ship-borne attitude sensor in real time through the hydraulic push rod. When the hull tilts due to waves or steering, the output end of the hydraulic push rod pushes the slider to move along the slide rail inside the tilt arm, driving the tilt arm to rotate around the first rotating seat, so that the surveying instrument fixed at the end automatically adjusts the pitch angle. For example, when the bow is raised, the hydraulic push rod contracts to deflect the tilt arm downward to offset the change in the hull elevation angle. When encountering lateral wave impact, the hydraulic push rod absorbs high-frequency vibration energy through the damping characteristics of the internal hydraulic oil, so that the surveying instrument detection surface always remains perpendicular to the bottom of the water body. Therefore, the mechanism can expand the scanning coverage area and eliminate the lateral blind spot of the upright detector.

[0021] In the present invention, through the provided telescopic angle adjustment mechanism, during use, the telescopic angle adjustment mechanism drives the screw rod to rotate through the first motor, causing the threaded sleeve to perform vertical telescopic movement along the guide cylinder, precisely controlling the diving depth of the surveying instrument. At the same time, the second motor drives the turntable to rotate horizontally through belt transmission, enabling the instrument fixing plate at the end of the telescopic rod to achieve 360° azimuth angle adjustment, thereby further expanding the scanning coverage area and eliminating the lateral blind area of the vertical detector.

[0022] In the present invention, through the provided telescopic sleeve, the telescopic sleeve covering the outside of the telescopic angle adjustment mechanism follows and unfolds to form a waterproof barrier, preventing the cable and the mechanical transmission structure from being invaded by sediment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is a three-dimensional structural schematic diagram of one side of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0025] Figure 2 is an arched support structure schematic diagram of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0026] Figure 3 is a screw rod structure schematic diagram of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0027] Figure 4 is a hydraulic push rod structure schematic diagram of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0028] Figure 5 is an installation seat structure schematic diagram of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0029] Figure 6 is a splicing seat structure schematic diagram of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0030] Figure 7 is a positioning column structure schematic diagram of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0031] Figure 8 is a locking structure schematic diagram of a water body terrain surveying device that can be fixed to a ship hull proposed by the present invention;

[0032] In the figure: 1. Disassembly and assembly mechanism; 101. Mounting base; 102. Splicing base; 103. Positioning column; 104. Lock rod; 105. Chute; 106. Pushing groove; 107. Spring; 108. Pin; 109. Lock; 110. Rotating shaft; 111. Slope unlocking block; 112. Limiting rod; 113. Pull rod; 114. Positioning hole; 2. Tilt adjustment mechanism; 201. Tilt arm; 202. First rotating seat; 203. Hydraulic push rod; 204. Second rotating seat; 205. Slide block; 3. Telescopic angle adjustment mechanism; 301. Arch bracket; 302. Ring bracket; 303. Screw; 304. First bevel gear; 305. Second bevel gear; 306. First motor; 307. Threaded sleeve; 308. Positioning frame; 309. Guide cylinder; 310. Instrument fixing plate; 311. Turntable; 312. Transmission component; 313. Second motor; 314. Telescopic rod; 315. Telescopic sleeve; 4. Surveying instrument. Detailed implementation mode

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0034] Refer to Figure 1-8 , a water terrain surveying and mapping device that can be fixed to a ship's hull, comprising:

[0035] The disassembly and assembly mechanism 1 is installed on the side of the hull and is used to realize the rapid disassembly and assembly of the surveying and mapping equipment, wherein the disassembly and assembly mechanism 1 includes a mounting seat 101 and a splicing seat 102, and positioning columns 103 and positioning holes 114 are respectively provided at the four corners of the top of the mounting seat 101 and the four corners of the bottom of the splicing seat 102, and the mounting seat 101 and the positioning column 103 are internally installed with a locking component for locking the splicing seat 102, and the locking component includes a locking rod 104 movable inside the mounting seat 101 and the positioning column 103, and the upper and lower ends of the locking rod 104 are respectively provided with a sliding groove 105 and a pushing groove 106, and a spring 107 is fixedly provided on the top of the locking rod 104, and a bayonet 108 for limiting the spring 107 is provided with a thread on the top of the positioning column 103, and both sides of the interior of the positioning column 103 are provided with lock buckles that are rotated by the rotating shaft 110 109. An unlocking assembly for releasing the locking assembly is installed inside the mounting seat 101. The unlocking assembly includes a sloped unlocking block 111 movably arranged inside the mounting seat 101. A limit rod 112 is fixedly arranged at the tail end of the sloped unlocking block 111. A pull rod 113 is fixedly arranged at the tail end of the limit rod 112. The mounting seat and the splicing seat in the disassembly and assembly mechanism are quickly docked under the engagement setting of the positioning column and the positioning hole. When the splicing seat is pressed down, the locking rod inside the positioning column pushes the lock buckle to expand outward under the action of the spring, so that the end of the F-shaped lock buckle is embedded in the groove on the inner wall of the splicing seat positioning hole to complete rigid locking, forming a mechanical fixation without bolts. When disassembly is required, the sloped unlocking block is driven forward by pulling the pull rod outside the mounting seat, and the tail of the lock buckle is squeezed by the inclined surface to make it shrink inward and disengage from the positioning hole, thereby realizing one-button unlocking.

[0036] The tilt adjustment mechanism 2 is installed on one side of the splicing seat 102 in the disassembly and assembly mechanism 1, and is used to realize the automatic adjustment of the angle according to the hull posture and water surface fluctuation, wherein the tilt adjustment mechanism 2 includes a tilt arm 201, which is rotatably arranged on one side of the splicing seat 102 through a first rotating seat 202, and a pushing component for pushing the tilt arm 201 to rotate is installed at the bottom of the splicing seat 102, and the pushing component includes a hydraulic push rod 203, which is rotatably arranged at the bottom of the splicing seat 102 through a second rotating seat 204, and a slider 205 is rotatably arranged at the output end of the hydraulic push rod 203, and the slider 205 is located in the internal movable setting of the tilt arm 201. When in use, the tilt adjustment mechanism responds to the feedback signal of the ship-borne attitude sensor in real time through the hydraulic push rod. When the hull tilts due to waves or steering, the output end of the hydraulic push rod pushes the slider to move along the slide rail inside the tilt arm, driving the tilt arm to rotate around the first rotating seat, so that the surveying instrument fixed at the end automatically adjusts the pitch angle;

[0037] The telescopic angle adjustment mechanism 3 is installed at the bottom end of the inclined arm 201 of the tilt adjustment mechanism 2 and is used to adjust the position of the device according to different water depths and surveying requirements. Among them, the telescopic angle adjustment mechanism 3 includes an arched bracket 301. A circular bracket 302 is fixedly arranged at the bottom of the arched bracket 301. A screw rod 303 is rotatably arranged inside the circular bracket 302. A threaded sleeve 307 is arranged on the outer side of the screw rod 303 in a threaded manner. The threaded sleeve 307 realizes telescopic movement through a limiting component. A turntable 311 is rotatably arranged on the outer side of the circular bracket 302. On one side of the bottom of the turntable 311, telescopic rods 314 are symmetrically and fixedly arranged. The movable end of the telescopic rod 314 is fixedly provided with an instrument fixing plate 310. The screw rod 303 and the turntable 311 realize telescopic or circumferential angle adjustment through a driving component. The driving component includes a first motor 306 and a second motor 313 fixed inside the arched bracket 301. The output end of the first motor 306 is fixedly provided with a first bevel gear 304. A second bevel gear 305 is arranged on the outer side of the first bevel gear 304 in a meshing and driving manner. The second bevel gear 305 is fixedly arranged on the outer side of the screw rod 303. The output end of the second motor 313 is connected to a transmission component 312 that drives the turntable 311 to rotate. The telescopic angle adjustment mechanism drives the screw rod to rotate through the first motor, so that the threaded sleeve performs vertical telescopic movement along the guide tube, accurately controlling the diving depth of the surveying instrument. At the same time, the second motor drives the turntable to rotate horizontally through belt transmission, so that the instrument fixing plate at the end of the telescopic rod realizes 360° azimuth angle adjustment.

[0038] Embodiment 1: The positioning column 103 and the positioning hole 114 are adapted to each other and are arranged in a snap-fit manner. The lock structures distributed at the four corners can evenly disperse the impact force of the hull bumps or water waves, ensuring the installation stability of the device and preventing the device from shifting or toppling due to vibration during the surveying process. The lock 109 is an F-shaped structure. The tail end of the lock 109 is movably arranged inside the push groove 106. The lock 109 is fixedly arranged in a snap-fit manner inside the positioning hole 114. The end of the F-shaped lock is embedded in the groove on the inner wall of the positioning hole of the splicing seat to complete rigid locking, forming a boltless mechanical fixation.

[0039] Embodiment 2: The limiting component includes a positioning frame 308 fixed at the bottom of the circular bracket 302. A guide tube 309 is fixedly arranged inside the positioning frame 308. The threaded sleeve 307 is movably arranged inside the guide tube 309. By setting the limiting mechanism, the threaded sleeve can move vertically stably, thereby improving the stability of the surveying instrument during use.

[0040] Embodiment 3: The transmission assembly 312 consists of a pulley and a belt. The pulley is fixed to the output end of the second motor 313. The belt is located outside the pulley and the turntable 311. A surveying instrument 4 is installed at the bottom of the instrument fixing plate. A telescopic sleeve 315 for protection is installed outside the arched frame. The telescopic sleeve covering the telescopic angle adjustment mechanism unfolds following the movement to form a waterproof barrier, preventing the cable and the mechanical transmission structure from being invaded by sediment.

[0041] Working principle: The water body topographic surveying equipment realizes quick disassembly and assembly through the disassembly and assembly mechanism 1. The mounting seat 101 and the splicing seat 102 are engaged through the positioning post 103 and the positioning hole 114. The locking rod 104 pushes the lock catch 109 to expand under the action of the spring 107 to achieve boltless fixation. During disassembly, the pull rod 113 drives the slope-shaped unlocking block 111 to move forward, squeezing the lock catch 109 to contract to achieve one-key unlocking. The tilt adjustment mechanism 2 automatically adjusts the angle through the tilt arm 201 and the hydraulic push rod 203. The hydraulic push rod 203 responds to the signal of the shipborne attitude sensor, pushing the slider 205 to move along the internal slide rail of the tilt arm, driving the tilt arm to rotate around the first rotating seat 202, enabling the surveying instrument to automatically adjust the pitch angle to adapt to the hull attitude and water surface fluctuations. The telescopic angle adjustment mechanism 3 realizes position and angle adjustment through the screw 303, the threaded sleeve 307 and the turntable 311. The first motor 306 drives the screw to rotate, causing the threaded sleeve to vertically expand and contract along the guide tube 309 to control the diving depth of the surveying instrument. The second motor 313 drives the turntable to rotate horizontally through the transmission assembly 312 (pulley and belt) to achieve 360° azimuth angle adjustment of the instrument fixing plate 310. The positioning frame 308 ensures the stable vertical movement of the threaded sleeve. The telescopic sleeve 315 unfolds following the movement to form a waterproof barrier to protect the cable and the mechanical structure from being invaded by sediment. In summary, this device realizes quick disassembly and assembly, automatic angle adjustment and all-round surveying, effectively improving the stability and accuracy of water body topographic surveying.

[0042] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A water body terrain mapping device that can be fixed to a hull, characterized in that, Including: A disassembly and assembly mechanism (1), installed on the side of the hull, for realizing the rapid disassembly and assembly of the surveying and mapping equipment. The disassembly and assembly mechanism (1) includes a mounting base (101) and a splicing base (102). Positioning columns (103) and positioning holes (114) are respectively provided at the four corners of the top of the mounting base (101) and the four corners of the bottom of the splicing base (102). A locking component for locking the splicing base (102) is installed inside the mounting base (101) and the positioning column (103), and an unlocking component for releasing the locking component is installed inside the mounting base (101). An inclination adjustment mechanism (2), installed on one side of the splicing base (102) in the disassembly and assembly mechanism (1), for realizing the automatic adjustment of the angle according to the hull attitude and water surface fluctuation. The inclination adjustment mechanism (2) includes an inclination arm (201). The inclination arm (201) is rotatably arranged on one side of the splicing base (102) through a first rotating seat (202), and a pushing component for pushing the inclination arm (201) to rotate is installed at the bottom of the splicing base (102). A telescopic angle adjustment mechanism (3), installed at the bottom end of the inclination arm (201) in the inclination adjustment mechanism (2), for realizing the adjustment of the position of the equipment according to different water depths and surveying and mapping requirements. The telescopic angle adjustment mechanism (3) includes an arch-shaped bracket (301). A ring-shaped bracket (302) is fixedly arranged at the bottom of the arch-shaped bracket (301). A screw rod (303) is rotatably arranged inside the ring-shaped bracket (302). A threaded sleeve (307) is arranged on the outer side of the screw rod (303) in a threaded manner. The threaded sleeve (307) realizes telescopic movement through a limiting component. A turntable (311) is rotatably arranged on the outer side of the ring-shaped bracket (302). Symmetrically fixed on one side of the bottom of the turntable (311) are telescopic rods (314). The movable end of the telescopic rod (314) is fixedly provided with an instrument fixing plate (310). The screw rod (303) and the turntable (311) realize telescopic or circumferential angle adjustment through a driving component.

2. The water body topographic surveying device capable of being fixed to a hull according to claim 1, characterized in that, The positioning column (103) and the positioning hole (114) are adapted to each other and are set in a snap-fit manner.

3. The water body topographic surveying device that can be fixed to the hull according to claim 1, characterized in that, The locking component includes a lock rod (104) that moves inside the mounting base (101) and the positioning column (103). Chutes (105) and push grooves (106) are respectively opened at the upper and lower ends inside the lock rod (104). A spring (107) is fixedly arranged at the top of the lock rod (104). A pin (108) for limiting the spring (107) is arranged on the top of the positioning column (103) in a threaded manner. On both sides inside the positioning column (103), lock catches (109) are rotatably arranged through rotating shafts (110).

4. A water body topographic surveying device that can be fixed to a hull according to claim 3, characterized in that The lock catch (109) is of an F-shaped structure. The tail end of the lock catch (109) is movably arranged inside the push groove (106), and the lock catch (109) is fixedly arranged in a snap-fit manner inside the positioning hole (114).

5. The water body topographic surveying and mapping device capable of being fixed to a hull according to claim 1, characterized in that, The unlocking assembly comprises a sloped unlocking block (111) movably arranged inside the mounting seat (101), a limiting rod (112) being fixedly arranged at the tail end of the sloped unlocking block (111), and a pulling rod (113) being fixedly arranged at the tail end of the limiting rod (112).

6. The water body topographic surveying and mapping equipment that can be fixed to the hull according to claim 1, characterized in that, The pushing assembly comprises a hydraulic push rod (203), wherein the hydraulic push rod (203) is rotatably arranged at the bottom of the splicing seat (102) via a second rotating seat (204), and a slider (205) is rotatably arranged at the output end of the hydraulic push rod (203), and the slider (205) is movably arranged inside the tilting arm (201).

7. The water body terrain mapping device capable of being fixed to a hull according to claim 1, characterized in that, The limiting assembly comprises a positioning frame (308) fixed to the bottom of the annular bracket (302), a guide cylinder (309) is fixedly arranged inside the positioning frame (308), and the threaded sleeve (307) is movably arranged inside the guide cylinder (309).

8. A water body topographic surveying device that can be fixed to a hull, characterized in that, The driving assembly comprises a first motor (306) and a second motor (313) fixed inside the arch support (301); a first bevel gear (304) is fixedly arranged at the output end of the first motor (306); a second bevel gear (305) is meshingly and transmission-engagedly arranged on the outer side of the first bevel gear (304); the second bevel gear (305) is fixedly arranged on the outer side of the screw rod (303); and a transmission assembly (312) for driving the rotating disk (311) to rotate is connected to the output end of the second motor (313).

9. A water body terrain mapping device that can be fixed to a hull, characterized in that, The transmission assembly (312) is composed of a pulley and a belt, wherein the pulley is fixed to the output end of the second motor (313), and the belt is located outside the pulley and the rotating disk (311).

10. The water body topographic surveying device capable of being fixed to a hull according to claim 1, wherein, A surveying instrument (4) is installed at the bottom of the instrument fixing plate, and a telescopic sleeve (315) for protection is installed on the outer side of the arch frame.

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