Marine magnetic gradient towing platform with heave gravity center compensation function

Abstract

The invention discloses an ocean magnetic gradient towing platform for heaving gravity center compensation, a front guide section and a mounting section of the ocean magnetic gradient towing platform are connected and form an upward inclined angle, the front guide section comprises two corner brackets and a reinforcing frame, and the two corner brackets and the reinforcing frame form a triangular structure; the mounting section comprises a left mounting frame and a right mounting frame, the two mounting frames are respectively connected with the rear ends of the two corner brackets, and magnetic gradiometers are respectively mounted at the front parts of the two mounting frames; an angle-adjustable front wing plate is arranged in the middle of the front portions of the two installation frames, the angle of the front wing plate is changed through rotation, and then the underwater entry depth of the ocean magnetic gradient dragging platform is adjusted when the ocean magnetic gradient dragging platform is dragged in water, and upwards-inclined rear wing plates are arranged on the outer sides of the rear portions of the two installation frames. The rear wing plate is used for keeping the ocean magnetic gradient dragging platform stable when the ocean magnetic gradient dragging platform is dragged in water. The defects in the prior art in the aspects of towing depth control performance and detection precision are overcome, and the accuracy and efficiency of ocean magnetic detection are improved.

Description

Technical Field

[0001] The invention relates to the field of ocean exploration technology, and in particular to an ocean magnetic gradient towing platform with lifting and center of gravity compensation. Background Art

[0002] With the gradual deepening of marine development and the continuous expansion of the scale of sea use, the simple avoidance principle (i.e. avoiding areas with obstacles when selecting construction sites) can no longer meet the needs of the rapid development of marine engineering. Therefore, in the early stage of engineering construction, it is necessary to fully understand the number, location, size and burial depth of submarine obstacles (such as sunken ships, submarine pipelines and unexploded ordnance, etc.) to provide sufficient basis for subsequent risk elimination and salvage work.

[0003] Existing technical solutions: Traditional marine magnetic gradiometers have problems such as difficult to control towing depth and easy to touch the bottom. For example, the SeaQuest magnetic gradiometer can perform real-time three-dimensional gradient vector measurement, and the data does not need to be processed and corrected, but it has disadvantages such as difficulty in controlling its towing depth, easy to be filled with mud and sand after touching the bottom, and low resolution, which seriously limits the application of this instrument in the eastern waters of Yuhuan. Compared with the SeaQuest gradiometer, the international G882 magnetic gradiometer (Geometrics TVG imported magnetic gradiometer) has the advantages of simple structure, easy installation, and high spatial resolution, which can make up for the above shortcomings of the SeaQuest gradiometer. However, the sea trial results show that it is easy to be rigidly connected with unknown obstacles on the seabed during underwater operations. The height from the seabed is completely controlled by the loaded counterweight. During specific operations, the counterweight needs to be repeatedly debugged, which limits its work efficiency. In addition, the import control of the G882 magnetometer is strict and its application is limited. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, provide an ocean magnetic gradient towing platform with elevated center of gravity compensation, solve the shortcomings of the prior art in towing depth control performance and detection accuracy, and improve the accuracy and efficiency of ocean magnetic detection.

[0005] The present invention adopts the following technical scheme: a marine magnetic gradient towing platform with lifting and center of gravity compensation, comprising a leading section and a mounting section which are connected in sequence front and back, the leading section forms an upwardly inclined angle relative to the mounting section, the leading section comprises two corner frames and a reinforcing frame, the front ends of the two corner frames are connected to form an angle and the reinforcing frame is connected to the rear ends of the two corner frames to form an overall triangular structure, the angle at the front ends of the two corner frames is used for external cable connection for towing; the mounting section comprises two left and right mounting frames, the two mounting frames are respectively connected to the rear ends of the two corner frames, and magnetic gradient meters are respectively installed at the front of the two mounting frames; a front wing plate with adjustable angle is arranged in the middle position of the front part of the two mounting frames, the front wing plate changes the angle by rotating to adjust the water entry depth of the marine magnetic gradient towing platform when it is towed in the water, and an upwardly inclined rear wing plate is arranged on the outer side of the rear part of the two mounting frames, the rear wing plate is used to keep the marine magnetic gradient towing platform stable when it is towed in the water.

[0006] As an improvement, a fan-shaped debugging frame is arranged on the inner side of the front part of the two mounting frames, the fan-shaped debugging frame faces the front part of the mounting frame, and a plurality of debugging holes are arranged at intervals along the fan-shaped structure of the front part of the fan-shaped debugging frame. The rear end of the front wing plate is rotatably arranged at the rear end of the fan-shaped debugging frame through an axis structure, and the front end of the front wing plate is positioned at the corresponding debugging hole by a fastener after being rotated and adjusted to a desired angle.

[0007] As an improvement, the fan-shaped debugging frame is provided with hollow holes, and the hollow holes of the fan-shaped debugging frames on both sides are used to hang heavy objects to compensate for the rising center of gravity of the ocean magnetic gradient towing platform.

[0008] As an improvement, a horizontal guide plate for stabilizing the mounting frames on both sides is provided on the inner side of the rear part of the two mounting frames.

[0009] As an improvement, a mounting base for mounting a cable interface box of the magnetic gradiometer 0 is provided extending backward from the front angle position of the two angle brackets.

[0010] As an improvement, a cross frame for installing an ultra-short baseline beacon is provided on the inner front side of the two corner frames.

[0011] As an improvement, a plurality of threading rings for threading the magnetic gradiometer cables are provided along the length direction on the inner sides of the two angle brackets.

[0012] As an improvement, the mounting frame is further provided with a handle bracket which can be flipped open and closed at the magnetic gradiometer. When flipped closed, the handle bracket is connected to the front and rear mounting frames or the magnetic gradiometers by fasteners for structural reinforcement.

[0013] As an improvement, the leading section is inclined upward at an angle of 30-45 degrees relative to the mounting section.

[0014] As an improvement, the rear fender is inclined upward at an angle of 45 degrees relative to the mounting frame.

[0015] Beneficial effects of the present invention:

[0016] 1. The angle can be adjusted through the design of the front wing plate. The distance between the instrument and the seabed can be flexibly adjusted in different water depths during navigation, solving the problem of the magnetic gradiometer entering the water in deep water areas. This innovation not only improves the reliability and accuracy of data collection, but also adapts to the needs of high-speed navigation of ships and improves the efficiency of data collection.

[0017] 2. A towing cable can be used to connect the equipment along the corner frame to achieve communication, power supply and synchronous data return. Compared with the traditional parallel wiring method, it significantly reduces the number of cables and entanglement problems, and improves the stability and reliability of the towing operation. This design not only reduces the system cost, but also simplifies the equipment installation and maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1 As shown, a specific embodiment of the marine magnetic gradient towing platform with elevated center of gravity compensation according to the present invention is shown. It includes a leading section 1 and a mounting section 2 which are connected in sequence front and back. The leading section 1 forms an upwardly inclined angle relative to the mounting section 2. The leading section 1 includes two corner frames 11 and a reinforcing frame 12. The front ends of the two corner frames 11 are connected to form an angle and are connected to the rear ends of the two corner frames 11 by the reinforcing frame 12 to form an overall triangular structure. The angle at the front ends of the two corner frames 11 is used for external cable connection for towing; the mounting section 2 includes two left and right mounting frames 21, the two mounting frames 21 are respectively connected to the rear ends of the two corner frames 11, and magnetic gradient meters 0 are respectively installed in front of the two mounting frames 21; a front wing plate 3 with an adjustable angle is arranged in the middle position of the front part of the two mounting frames 21, and the front wing plate 3 changes the angle by rotating to adjust the water depth of the marine magnetic gradient towing platform when it is towed in the water; an upwardly inclined rear wing plate 4 is arranged on the outer side of the rear part of the two mounting frames 21, and the rear wing plate 4 is used to keep the marine magnetic gradient towing platform stable when it is towed in the water.

[0021] When the present invention is in use, the overall frame of the marine magnetic gradient towing platform is made of non-ferromagnetic materials, usually composed of resin materials, carbon fiber materials, titanium aluminum copper and other non-ferromagnetic metals, etc., to avoid the influence of ferromagnetic materials on the data acquisition of the magnetometer. Two mounting frames 21 are used to fix two magnetic gradiometers 0 at a certain distance underwater, and the front angles of two corner frames 11 are provided as towing points to connect the towing cable to facilitate the towing operation of the ship; a towing cable is used to achieve communication, power supply and synchronous data return. Compared with the traditional parallel line method, the number of cables and entanglement problems are significantly reduced, and the stability and reliability of the towing operation are improved. This design not only reduces the system cost, but also simplifies the equipment installation and maintenance process. Based on previous research on the magnetic gradiometer 0, in order to ensure the accuracy of the data during the subsequent magnetic gradient calculation, the two magnetic gradiometers 0 in this scheme are arranged horizontally left and right, and the distance between the sensors is strictly controlled at 1.5 meters. It can be seen from the arrangement of the two magnetic gradiometers 0. Figure 1 .

[0022] In the traditional single magnetometer measurement mode, field acquisition can only obtain the total field strength data of a single magnetometer. For some target detection applications, the magnetic anomalies caused by small targets will be submerged in the total field strength changes in the survey area, making it difficult to obtain relevant information. When measuring the horizontal gradiometer of this scheme, a dual magnetic gradiometer 0 is installed horizontally side by side and dragged to measure at the same time. Since the distance between the two magnetic gradiometers 0 is fixed, the transverse magnetic gradient calculation can be performed based on the magnetic data collected by the two magnetic gradiometers 0 at the same time, and then the total field data collected by the two magnetic gradiometers 0 before and after are used to obtain the longitudinal magnetic gradient data, and finally the horizontal gradient data is obtained through the above two calculation components. The magnetic anomalies caused by small underwater seabed targets will cause a gradient distribution different from the local total field at a closer position, and present the characteristics of rapid changes, so it is easy to be accurately interpreted, assisted by external positioning means, so as to obtain accurate underwater target location information.

[0023] The two corner frames 11 and one reinforcement frame 12 of the leading section 1 form a nearly equilateral triangle welded structure, which can ensure the strength of the structure and the position accuracy of the rear mounted magnetic gradiometer 0. The leading section 1 and the rear mounting section 2 are fixed with a double locking pin in a single axis, which can prevent the leading section 1 from pitching the magnetic gradiometer 0 due to the movement of the tow cable, and ensure the stability of the posture of the rear dual magnetic gradiometer 0 to the maximum extent.

[0024] In order to control the entry depth of the marine magnetic gradient towing platform, this solution innovatively sets a front wing plate 3 with adjustable angle in the middle position of the front of the two mounting frames 21, which is convenient for adjusting the angle according to actual conditions during field operations, improves work efficiency, and solves the problem of the gradient meter entering the water in deep water areas. This innovation not only improves the reliability and accuracy of data collection, but also adapts to the needs of high-speed navigation of ships and improves the efficiency of data collection. The outer side of the rear of the two mounting frames 21 is provided with an upwardly tilted rear wing plate 4, which can obtain a more stable magnetic gradient meter 0 posture at high speeds.

[0025] As an improved specific implementation method, a fan-shaped debugging frame 22 is arranged on the inner side of the front part of the two mounting frames 21, and the fan-shaped debugging frame 22 faces the front part of the mounting frame 21. The front part of the fan-shaped debugging frame 22 is provided with a plurality of debugging holes 221 at intervals along its fan-shaped structure. The rear end of the front fender 3 is rotatably arranged at the rear end of the fan-shaped debugging frame 22 through an axis structure. The front end of the front fender 3 is positioned at the corresponding debugging hole 221 by a fastener after being rotated and adjusted to a desired angle.

[0026] like Figure 1 As shown, in the specific implementation, the front end of the fan-shaped debugging frame 22 is connected to the leading section 1 through a pin, the rear part is connected to the magnetic gradiometer 0 or the mounting frame 21 through a pin, and the side is connected to the adjustable angle front wing plate 3. The rear end of the front wing plate 3 is a rotatable mounting shaft, and the front end has a mounting hole that can be set with a fastening bolt. Several debugging holes 22 that can fix the front wing plate 3 are designed on the fan-shaped debugging frame 22. In order to ensure the towing effect, it is recommended that the user keep the adjustable angle front wing plate 3 horizontal or adjust one hole position downward during use, and then use it as the initial hole position; other hole positions are used as adjustment options under special circumstances. When the front wing plate 3 uses other hole positions, the overall mechanism is more susceptible to side flow impact. On the other hand, the connection between the front triangular leading section 1 and the fan-shaped debugging frame 22 can solve the collision and hooking of the instrument with unknown obstacles in the water (fishing nets, seaweed, garbage, etc.) during operation, thereby reducing the risk of equipment damage and extending the service life of the equipment.

[0027] As an improved specific implementation, the fan-shaped debugging frame 22 is provided with hollow holes 25, and the hollow holes 25 of the fan-shaped debugging frames 22 on both sides are used to hang heavy objects to compensate for the lifting center of gravity of the marine magnetic gradient towing platform.

[0028] like Figure 1 As shown, a hollow hole 25 is provided at the fan-shaped adjustment frame 22, and then used to selectively hang weights of different weights according to the need to raise the center of gravity. Hanging weights at this point can balance the whole and improve stability; the weights can be lead blocks. According to specific needs, weights can also be hung along the two mounting frames 21 to achieve a better effect of adjusting the center of gravity.

[0029] As an improved specific implementation manner, a horizontal guide plate 23 for stabilizing the mounting frames 21 on both sides is arranged on the inner side of the rear portion of the two mounting frames 21 .

[0030] like Figure 1 As shown, the relative movement of the two mounting frames 21 and the rear of the two magnetic gradiometers 0 is strictly limited by setting the rear horizontal guide plate 23, ensuring a constant distance between the sensors, while supporting and connecting the rear. The horizontal guide plate 23 is connected to the clamp on the mounting frame 21 using copper bolts during installation.

[0031] As an improved specific implementation manner, a mounting seat 14 for mounting a cable interface box of the magnetic gradiometer 0 is provided extending backward at the front angle position of the two angle brackets 11.

[0032] like Figure 1 As shown, the design weight of the marine magnetic gradient towing platform is about 50kg (excluding the magnetic gradient meter 0), and the towing point is designed at the front center position to ensure the overall stability during towing; a mounting seat 14 for the magnetic gradient meter 0 cable interface box is reserved at the rear of the towing point to ensure the realization of communication and power supply functions.

[0033] As an improved specific implementation manner, a cross frame 13 for installing an ultra-short baseline beacon is provided on the inner side of the front portion of the two corner frames 11 .

[0034] like Figure 1 As shown, when towing, the marine magnetic gradient towing platform is usually located far from the stern (the cable length is at least 3 times the length of the ship). In order to obtain the precise geographic coordinates of the underwater magnetic anomaly point, it is usually necessary to add an ultra-short baseline to the marine magnetic gradient towing platform to obtain the real-time geographic location of the underwater marine magnetic gradient towing platform. Based on this, when designing this solution, the need for adding ultra-short baseline beacons during actual operation is fully considered, and the installation position of the ultra-short baseline beacon is reserved in front of the two corner brackets 11, that is, a cross frame 13 is set. At the same time, in order to avoid the ferromagnetism of the beacon itself affecting the accuracy of the magnetic gradient meter 0 data acquisition, the position of the cross frame 13 is as close to the front end as possible to be as far away from the magnetic gradient meter 0 probe as possible.

[0035] As an improved specific implementation manner, a plurality of threading rings 15 for threading the magnetic gradiometer 0 cables are provided on the inner sides of the two angle brackets 11 along the length direction.

[0036] like Figure 1 As shown, the signal integration cable of the two magnetic gradiometer 0 tow cables is also installed in the leading section 1 to complete the synchronization of the signals of the two magnetic gradiometers 0. A plurality of threading rings 15 are arranged on the inner side of the two corner brackets 11 for threading the cables, which not only well protects the cables for routing, but also reduces the overall resistance in the water and improves the stability when towing in the water.

[0037] As an improved specific implementation, the mounting frame 21 is further provided with a handle bracket 24 that can be flipped open and closed at the magnetic gradiometer 0. When flipped closed, the handle bracket 24 is connected to the front and rear mounting frames 21 or the magnetic gradiometer 0 by fasteners for structural reinforcement.

[0038] like Figure 1 As shown, by means of the further provided handle bracket 24, after the magnetic gradiometer 0 is installed, the handle bracket 24 is flipped over and closed, thereby enhancing the connection strength of the device during towing.

[0039] As an improved specific implementation manner, the leading section 1 is inclined upwardly at an angle of 30-45 degrees relative to the mounting section 2.

[0040] like Figure 1 As shown, the leading section 1 is installed with the mounting section 2 at an angle of 30-45 degrees to keep the magnetic gradiometer 0 stable when being towed forward to prevent bumps.

[0041] As an improved specific implementation manner, the rear wing panel 4 is inclined upward at an angle of 45 degrees relative to the mounting frame 21 .

[0042] like Figure 1 As shown, the inclined rear wing plate 4 is installed at a 45-degree angle to keep the magnetic gradiometer 0 stable when towing forward and prevent it from tilting. A hoop is set at the bottom of the rear wing plate 4 and fixed to the mounting frame 21. The top is a carbon fiber plate, which is inclined at a fixed angle.

[0043] In summary, the present invention has obvious advantages in communication and power supply, water depth regulation, obstacle prevention and positioning accuracy. It can effectively solve the problems existing in the prior art, improve the efficiency, reliability and accuracy of ocean magnetic field data acquisition, and promote the development of marine scientific research and engineering applications.

[0044] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An ocean magnetic gradient towing platform with lifting center of gravity compensation, characterized by: The invention comprises a leading section (1) and a mounting section (2) which are connected in sequence in a front-to-back manner, wherein the leading section (1) forms an upwardly inclined angle relative to the mounting section (2), the leading section (1) comprises two corner frames (11) and a reinforcing frame (12), the front ends of the two corner frames (11) are connected to form an angle and the reinforcing frame (12) is connected to the rear ends of the two corner frames (11) to form an overall triangular structure, and the angle at the front ends of the two corner frames (11) is used for connection with external cables for dragging; the mounting section (2) comprises two left and right mounting frames (21), and the two mounting frames (21) are connected to the rear ends of the two corner frames (11) to form an overall triangular structure. (21) are respectively connected to the rear ends of the two corner brackets (11), and magnetic gradiometers (0) are respectively installed at the front of the two mounting brackets (21); a front wing plate (3) with an adjustable angle is arranged in the middle position of the front of the two mounting brackets (21), and the front wing plate (3) is adjusted by rotating to change the angle so as to adjust the water depth of the marine magnetic gradient towing platform when it is towed in the water; and an upwardly inclined rear wing plate (4) is arranged on the outer side of the rear of the two mounting brackets (21), and the rear wing plate (4) is used to keep the marine magnetic gradient towing platform stable when it is towed in the water.

2. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, characterized in that: A fan-shaped debugging frame (22) is arranged inside the front part of the two mounting frames (21), the fan-shaped debugging frame (22) faces the front part of the mounting frame (21), and the front part of the fan-shaped debugging frame (22) is provided with a plurality of debugging holes (221) at intervals along its fan-shaped structure, the rear end of the front wing plate (3) is rotatably arranged at the rear end of the fan-shaped debugging frame (22) through an axis structure, and the front end of the front wing plate (3) is positioned at the corresponding debugging hole (221) by a fastener after being rotated to adjust the angle.

3. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 2, characterized in that: The fan-shaped debugging frame (22) is provided with hollow holes (25), and the hollow holes (25) of the fan-shaped debugging frames (22) on both sides are used to hang heavy objects so as to compensate for the lifting center of gravity of the marine magnetic gradient towing platform.

4. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, 2 or 3, characterized in that: Horizontal guide plates (23) for stabilizing the mounting frames (21) on both sides are arranged on the inner sides of the rear parts of the two mounting frames (21).

5. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, 2 or 3, characterized in that: A mounting seat (14) for mounting a cable interface box of the magnetic gradiometer (0) is provided extending backwards at the angle position of the front ends of the two angle brackets (11).

6. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, 2 or 3, characterized in that: A cross frame (13) for installing an ultra-short baseline beacon is arranged on the inner side of the front part of the two corner frames (11).

7. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, 2 or 3, characterized in that: A plurality of threading rings (15) for threading cables of the magnetic gradiometer (0) are arranged on the inner sides of the two angle brackets (11) along the length direction.

8. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, 2 or 3, characterized in that: The mounting frame (21) is also provided with a handle bracket (24) which can be flipped open and closed at the magnetic gradiometer (0); when flipped closed, the handle bracket (24) is connected to the front and rear mounting frames (21) or the magnetic gradiometer (0) by fasteners for structural reinforcement.

9. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, 2 or 3, characterized in that: The leading section (1) is inclined upwards at an angle of 30-45 degrees relative to the mounting section (2).

10. The marine magnetic gradient towing platform with lifting center of gravity compensation according to claim 1, 2 or 3, characterized in that: The rear wing plate (4) is inclined upward at an angle of 45 degrees relative to the mounting frame (21).

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