Electromagnetic ocean current meter self-balancing device for ocean buoy

Abstract

The invention relates to the technical field of electromagnetic ocean current meters, in particular to an electromagnetic ocean current meter self-balancing device for an ocean buoy, which comprises a universal fixed base, a balancing suspension rod is mounted at the bottom of the universal fixed base, an electromagnetic ocean current meter is mounted at the bottom of the balancing suspension rod, and a balancing weight and a damping system are connected to the bottom of the electromagnetic ocean current meter. The damping system comprises a plurality of damping flat plates, and a regular pentagon structure is defined by the damping flat plates. According to the electromagnetic ocean current meter self-balancing device for the ocean buoy, real-time posture correction when the buoy inclines is achieved through a mechanical self-balancing structure of the universal fixing base, the balance suspension rod, the balancing weight and the damping system. When the buoy generates rolling, pitching or heaving motion due to stormy waves, the top universal fixing base inclines along with the buoy, and the middle balance suspension rod, the bottom balancing weight and the damping system always tend to keep the state of vertically pointing to the earth center through flexible rotation of the universal hinge under the action of inertia and gravity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic current meter, in particular, to a self-balancing device of electromagnetic current meter for ocean buoy. BACKGROUND

[0002] In the field of ocean hydrological observation, electromagnetic current meter can effectively infer the speed and direction of water flow by measuring the magnetic field changes caused by the interaction of electromagnetic waves and water flow based on the working principle of Faraday's law of electromagnetic induction, thereby becoming a widely used instrument. The electromagnetic current meter installed on the ocean buoy faces many challenges in actual work. The ocean buoy is easily affected by environmental factors such as wind and sea waves, and generates heave, roll, and pitch movements. The electromagnetic current meter measures the movement speed of seawater relative to its own sensor. When the buoy fluctuates or swings with the sea waves, the electromagnetic current meter will record the superimposed value of the real flow speed of seawater and the displacement speed of the buoy itself, especially in sea conditions with obvious heave, the false flow speed component in the vertical direction will be introduced into the calculation of horizontal flow speed, resulting in the measured flow speed being higher than the actual value.

[0003] In terms of flow direction measurement, the electromagnetic current meter relies on the built-in compass or azimuth sensor. If the buoy experiences severe roll or pitch, the reference direction of the sensor will be momentarily offset, causing the recorded flow direction angle to deviate from the true value. At present, in order to correct such deviations, an attitude sensor is usually installed on the buoy to monitor the displacement, attitude angle, and other changes of the buoy in real time, and during the processing of the current data, the original current data is vectorially deducted from the buoy's own movement component through a rotation matrix linear transformation model to restore the real movement of seawater. However, the electromagnetic induction process is essentially nonlinear, and in the case of combined roll and pitch motion, when the tilt angle of the buoy is > 15°, the electromagnetic current meter will produce nonlinear changes in cutting the magnetic lines of force, and the three-dimensional distribution of the cutting magnetic lines of force becomes extremely complex, making it difficult for the linear model to accurately map the real physical process, thus greatly reducing the effectiveness of the electromagnetic current meter attitude correction, and making it difficult to ensure the accuracy of the measurement data. Therefore, developing a technical solution that can effectively solve the above problems is of great significance to improving the accuracy of the measurement data of the electromagnetic current meter on the ocean buoy. SUMMARY

[0004] The purpose of the present application is to provide a self-balancing device of electromagnetic current meter for ocean buoy to solve the problem of electromagnetic current meter relying on built-in compass or azimuth sensor in flow speed and direction measurement, if the buoy experiences severe roll or pitch, the electromagnetic current meter will produce nonlinear changes in cutting the magnetic lines of force, and the attitude sensor cannot effectively correct the measured flow speed and direction data, causing the recorded flow speed and direction to deviate from the true value.

[0005] To achieve the above object, the application provides a self-balancing device for electromagnetic current meter of ocean buoy, which comprises a universal fixed base, a balance suspension rod is installed at the bottom of the universal fixed base, an electromagnetic current meter is installed at the bottom of the balance suspension rod, a counterweight and a damping system are installed at the bottom of the electromagnetic current meter, the damping system comprises a plurality of damping plates, the damping plates form a regular pentagon structure, and at least one surface of the damping plates faces the direction of ocean current movement, so as to further inhibit and slow down the swing speed of the balance suspension rod.

[0006] The setting is based on the composite design of "mechanical support + damping energy dissipation", a stable installation base is provided through the universal fixed base, and the balance suspension rod realizes component linkage support; meanwhile, the damping plates in the regular pentagon distribution utilize the fluid resistance of seawater to the plates, according to the principle that "resistance is positively correlated with the area of the flow" in fluid mechanics, at least one plate surface faces the direction of ocean current, and directional damping force is formed.

[0007] As a preferred scheme of the application, the universal fixed base comprises a base plate, and the base plate is connected with the balance suspension rod through a universal hinge at the bottom.

[0008] The setting utilizes the multi-degree-of-freedom rotation characteristics of the universal hinge, according to the principle that "flexible connection realizes relative rotation" in mechanical kinematics, so that the base plate and the balance suspension rod form a non-rigid connection, allowing the balance suspension rod to rotate flexibly in three-dimensional space around the universal hinge, breaking the rigid posture transmission between the buoy and the current meter.

[0009] As a preferred scheme of the application, locking pieces are installed at both ends of the base plate, the locking pieces are in U-shaped structure, and the locking pieces are fixedly connected with the underwater derrick of the buoy through bolts.

[0010] The setting utilizes the embracing structure of the U-shaped locking piece, combines the detachable rigid fixing characteristics of the bolt connection, according to the principle that "multiple-point fixing enhances stability" in mechanical connection, the U-shaped piece is wrapped with the underwater derrick of the buoy, and then the bolt is fastened, so as to realize reliable connection between the universal fixed base and the buoy.

[0011] As a preferred scheme of the application, the balance suspension rod comprises a rigid lightweight rod, a U-shaped clamp is installed at the bottom of the rigid lightweight rod, and the U-shaped clamp is fixedly connected with the electromagnetic current meter at the bottom.

[0012] The setting is based on the principle of "rigid support + gravity compensation", the rigid lightweight rod (such as carbon fiber material) utilizes its high-strength characteristics to realize structural support, while reducing the overall weight; the U-shaped clamp provides a detachable installation interface for the electromagnetic current meter, the counterweight changes the gravity center of the suspension system through its own weight, so that the gravity center of the system is lower than the rotation center of the universal hinge, and according to the gravity orientation principle, the posture is self-calibrated.

[0013] As a preferred scheme of the present application, a threaded hole is formed in the middle of the weight block, and the threaded hole of the weight block is threadedly connected with the lower end of the electromagnetic current meter.

[0014] As a preferred scheme of the present application, a fixing frame is mounted on the inner side of the damping flat plate, and the middle of the fixing frame is connected and fixed with the bottom of the weight block through a connecting rod.

[0015] This setting is based on the principle of "rigid connection transmission damping force", the fixing frame realizes the regular pentagon distribution fixation of the damping flat plate through multidirectional support, the connecting rod rigidly connects the fixing frame with the electromagnetic current meter, according to the principle of "rigid transmission of force" in mechanical dynamics, the water flow resistance of the damping flat plate can be directly transmitted to the electromagnetic current meter, and precise damping energy consumption is realized.

[0016] As a preferred scheme of the present application, the electromagnetic current meter is detachably connected with the U-shaped clamp.

[0017] As a preferred scheme of the present application, when the buoy tilts with waves, the top universal fixing base tilts, the middle balance suspension rod and the bottom weight block tend to keep the original vertical state under the action of inertia, the universal hinge rotates, the weight block repositions under the action of gravity and points to the center of the earth, the electromagnetic current meter mounted at the bottom of the balance suspension rod keeps vertical downward, meanwhile, the damping system absorbs the high-frequency energy transmitted by waves, prevents the system from swinging back and forth, makes it quickly and stably keep in the vertical position, ensures that the tilt angle of the electromagnetic current meter is less than 10°, in the case that the tilt angle is small, the deformation of the electromagnetic current meter cutting the magnetic force line is small, the flow speed and flow direction data measured by the electromagnetic current meter can be corrected by the reusable attitude sensor, and the measurement accuracy of the flow speed and flow direction is improved.

[0018] This setting is based on the synergistic working principle of "inertia retention + gravity calibration + damping energy consumption", when the buoy tilts, the balance suspension rod and the weight block keep the initial vertical state due to inertia, the universal hinge provides a rotating space, the weight block pulls the suspension rod to adjust to the vertical posture under the action of gravity, the damping system absorbs the swing energy, according to Newton's law of motion and the principle of fluid mechanics, the attitude is quickly and stably calibrated.

[0019] Compared with the prior art, the present application has the following beneficial effects: 1. The self-balancing device of the electromagnetic current meter for this marine buoy utilizes a mechanical self-balancing structure consisting of a "universal fixed base + balance suspension rod + counterweight + damping system" to achieve real-time attitude correction when the buoy tilts. When the buoy experiences roll, pitch, or swaying motion due to wind and waves, the top universal fixed base tilts with the buoy, while the middle balance suspension rod and the bottom counterweight, under the influence of inertia and gravity, maintain a vertical orientation towards the Earth's center through the flexible rotation of the universal hinge. Ultimately, this ensures that the tilt angle of the electromagnetic current meter is <10°, far superior to the limitation of traditional attitude sensor correction schemes that "fail when the buoy tilt angle is large," thus physically avoiding errors in current velocity and direction measurement.

[0020] The damping system employs a pentagonal damping plate structure, with at least one face always facing the direction of ocean current movement, enabling efficient absorption of high-frequency energy transmitted by waves. Compared to the problem of "system swaying back and forth and long stabilization time" in undamped designs, this damping structure can quickly attenuate the sway amplitude, allowing the current meter to quickly stabilize to a vertical position after the buoy's violent movement, avoiding dynamic measurement deviations caused by continuous swaying.

[0021] 2. In the self-balancing device of the electromagnetic current meter for the ocean buoy, the current meter is decoupled from the buoy's motion through a mechanical structure. The current meter only measures the actual motion of the seawater relative to a fixed reference (vertical direction of the Earth's center), thus avoiding the problem of "buoy displacement velocity superimposed on the actual seawater flow velocity" from the source and greatly reducing the flow velocity measurement error.

[0022] The electromagnetic current meter is rigidly fixed to the U-shaped clamp of the balance suspension rod via threaded mounting holes, ensuring that the sensor and the vertical attitude of the suspension rod are synchronized. Combined with the gravity orientation effect of the counterweight, the reference direction of the current meter's built-in compass / azimuth sensor remains stable, significantly reducing the deviation in current direction measurement and meeting the stringent requirements of high-precision oceanographic observation for current direction data.

[0023] 3. In the self-balancing device of the electromagnetic current meter for this marine buoy, the universal fixed base is bolted to the underwater well frame of the buoy through a U-shaped locking component, and the installation and disassembly do not require modification of the main structure of the buoy; the balance suspension rod adopts a combination of "rigid lightweight rod + U-shaped clamp", and the electromagnetic current meter and counterweight are fixedly connected. Different weights of counterweights can be replaced according to different sea conditions, which is suitable for various types of buoys from nearshore to open ocean. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the universal fixing base in this invention; Figure 3 This is a schematic diagram of the balance suspension rod in this invention; Figure 4This is a schematic diagram of the damping system in this invention; The meanings of the labels in the diagram are as follows: 1. Universal mounting base; 11. Base plate; 12. Universal hinge; 13. Locking element; 2. Balance suspension rod; 21. Rigid lightweight rod; 22. U-shaped clamp; 23. Counterweight; 4. Damping system; 41. Damping plate; 42. Fixing frame; 43. Connecting rod; 5. Electromagnetic current meter. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides a self-balancing device for an electromagnetic current meter used in marine buoys, such as... Figure 1 , Figure 4 As shown, the device includes a universal mounting base 1, a balance suspension rod 2 mounted on the bottom of the universal mounting base 1, an electromagnetic current meter 5 mounted on the bottom of the balance suspension rod 2, a counterweight 23 and a damping system 4 mounted on the bottom of the electromagnetic current meter, and the damping system 4 including several damping plates 41 arranged in a regular pentagonal structure, with at least one face of each damping plate 41 facing the direction of ocean current movement, further suppressing and slowing down the swing speed of the balance suspension rod 2. The core components of the device are made of seawater corrosion-resistant materials (such as a 316 stainless steel base, a carbon fiber rigid lightweight rod, and a non-magnetic titanium alloy counterweight), allowing it to work for extended periods in salt spray and high water pressure environments, effectively extending its service life.

[0027] Based on a composite design of "mechanical support + damping energy dissipation," a stable installation foundation is provided by the universal fixed base 1, and the balance suspension rod 2 achieves linkage support for the components. Simultaneously, using pentagonally distributed damping plates 41 (part of the damping system 4), the fluid resistance of seawater on the plates is utilized. Based on the principle in fluid mechanics that "resistance is positively correlated with the area facing the current," at least one damping plate 41 is ensured to face the ocean current direction, forming a directional damping force. This constructs the overall framework of the device, enabling the orderly assembly of core components such as the universal fixed base 1, balance suspension rod 2, damping system 4, and electromagnetic current meter 5, ensuring stable installation of the electromagnetic current meter 5. The damping system 4 effectively suppresses the swaying speed of the balance suspension rod 2, preventing drastic changes in the attitude of the electromagnetic current meter 5 due to buoy swaying, laying the foundation for subsequent attitude stability and initially reducing the dynamic error of ocean current measurements.

[0028] In this embodiment, as Figure 2As shown, the universal mounting base 1 includes a base plate 11, and the bottom of the base plate 11 is universally connected to the balance suspension rod 2 via a universal hinge 12.

[0029] By utilizing the multi-degree-of-freedom rotational characteristics of the universal hinge 12 (belonging to the universal fixed base 1), and based on the principle of "flexible connection to achieve relative rotation" in mechanical kinematics, a non-rigid connection is formed between the base plate 11 (belonging to the universal fixed base 1) and the balance suspension rod 2. This allows the balance suspension rod 2 to rotate flexibly in three-dimensional space around the universal hinge 12, breaking the rigid attitude transmission between the buoy and the electromagnetic current meter 5. When the buoy tilts, the universal fixed base 1 tilts synchronously with the buoy, while the balance suspension rod 2 can independently adjust its attitude through the universal hinge 12. This avoids the buoy's tilting attitude being directly transmitted to the electromagnetic current meter 5, providing a mechanical motion basis for the electromagnetic current meter 5 to maintain a vertical attitude and reducing the forced interference of the buoy's tilting on the attitude of the electromagnetic current meter 5.

[0030] Specifically, such as Figure 2 As shown, locking components 13 are installed at both ends of the base plate 11. The locking components 13 have a U-shaped structure and are fixedly connected to the underwater well frame of the buoy by bolts.

[0031] Utilizing the U-shaped structure of the locking component 13 (belonging to the universal mounting base 1) and combining the detachable rigid fixing characteristics of bolted connections, based on the principle of "multi-point fixing to enhance stability" in mechanical connections, the U-shaped locking component 13 fits snugly against the buoy's underwater derrick, and is then secured with bolts, achieving a reliable connection between the base plate 11 (belonging to the universal mounting base 1) and the buoy, thereby fixing the entire universal mounting base 1. This ensures a firm connection between the universal mounting base 1 and the buoy's underwater derrick, preventing loosening or displacement during wind and wave impacts or violent buoy movements, providing a stable installation reference for the self-balancing device composed of the balance suspension rod 2, damping system 4, and electromagnetic current meter 5; simultaneously, the bolted connection facilitates the installation, disassembly, and maintenance of the device, reducing the difficulty of later operation and maintenance.

[0032] Furthermore, such as Figure 3 As shown, the balance suspension rod 2 includes a rigid lightweight rod 21, and a U-shaped clamp 22 is installed at the bottom of the rigid lightweight rod 21. The bottom of the U-shaped clamp 2 is connected and fixed to the electromagnetic current meter 5.

[0033] Based on the principle of "rigid support + gravity balancing", the rigid lightweight rod 21 (belonging to the balance suspension rod 2) utilizes its high strength characteristics to achieve structural support while reducing the overall weight; the U-shaped clamp 22 (belonging to the balance suspension rod 2) provides a detachable installation interface for the electromagnetic current meter; the counterweight 23 changes the center of gravity of the suspension system composed of the balance suspension rod 2 and related components through its own weight, making the system's center of gravity lower than the rotation center of the universal hinge 12 (belonging to the universal fixed base 1), and achieves attitude self-calibration based on the principle of gravity orientation. The rigid lightweight rod 21, while ensuring support strength, reduces the impact of the balance suspension rod 2's own weight on the rotation center of gravity of the electromagnetic current meter; the counterweight 23 is configured to provide gravity traction for the balance suspension rod 2. When the buoy tilts, the counterweight 23 can drive the balance suspension rod 2 to tend towards a vertical state, initially achieving attitude stability for the electromagnetic current meter 5 and avoiding attitude loss of control due to the flexibility or weight imbalance of the balance suspension rod 2.

[0034] Furthermore, such as Figure 3 As shown, a threaded hole is provided in the middle of the counterweight 23, and the threaded hole of the counterweight 23 is threadedly connected to the electromagnetic current meter 5.

[0035] The detachable nature of the threaded connection, based on the principle of "threaded engagement for adjustment and fixation" in mechanical connections, allows for precise installation and position adjustment of the counterweight 23 on the electromagnetic current meter 5 through the threaded hole in the center of the counterweight 23 engaging with the threaded part of the electromagnetic current meter 5. The weight of the counterweight 23 or its installation height on the electromagnetic current meter 5 can be adjusted according to different sea conditions (such as nearshore shallow waters and deep ocean). This flexibly optimizes the center of gravity position of the suspension system composed of the balance suspension rod 2, ensuring that the counterweight 23 can effectively pull the balance suspension rod 2 to maintain verticality under different wave intensities. Simultaneously, the threaded connection facilitates the replacement and maintenance of the counterweight 23, improving the environmental adaptability of the device.

[0036] Furthermore, such as Figure 4 As shown, a fixing frame 42 is installed on the inner side of the damping plate 41, and the middle part of the fixing frame 42 is connected and fixed to the bottom of the counterweight block through a connecting rod 43.

[0037] Based on the principle of "rigid connection for transmitting damping force," the fixing frame 42 (belonging to the damping system 4) achieves a pentagonal distribution and fixation of the damping plate 41 (belonging to the damping system 4) through multi-directional support. The connecting rod 43 (belonging to the damping system 4) connects and fixes the fixing frame 42 to the bottom of the weight. According to the principle of "rigid transmission of force" in mechanics, the water flow resistance experienced by the damping plate 41 can be directly transmitted to the electromagnetic current meter 5 through the fixing frame 42 and the connecting rod 43, achieving precise damping energy dissipation. This ensures that the damping plate 41 always maintains a pentagonal distribution, ensuring that at least one surface of the damping plate 41 faces the ocean current direction, stably exerting its damping effect. The rigid connection of the connecting rod 43 avoids losses during the transmission of damping force, enabling the damping system 4 to efficiently absorb the oscillation energy of the electromagnetic current meter 5, accelerating the attitude stabilization of the electromagnetic current meter 5 and shortening the stabilization time.

[0038] Furthermore, such as Figure 4 As shown, the electromagnetic current meter 5 is detachably connected to the U-shaped clamp 22.

[0039] Furthermore, when the buoy tilts with the waves, the top universal mounting base 1 tilts accordingly. The middle balance suspension rod 2 and the bottom counterweight 23 tend to maintain their original vertical state under the action of inertia. The universal hinge 12 rotates, and the counterweight 23 readjusts its position to point towards the center of the earth under the action of gravity, so that the electromagnetic current meter 5 installed at the bottom of the balance suspension rod 2 remains vertically downward. At the same time, the damping system 4 absorbs the high-frequency energy transmitted by the waves, preventing the system from swinging back and forth, so that it quickly and smoothly stabilizes in a vertical position, ensuring that the tilt angle of the electromagnetic current meter 5 is <10°.

[0040] Based on the collaborative working principle of "inertia maintenance + gravity calibration + damping energy dissipation", when the buoy tilts, the balance suspension rod 2 and the bottom counterweight 23 maintain their initial vertical state due to inertia. The universal hinge 12 (belonging to the universal fixed base 1) provides rotation space. Under the action of gravity, the counterweight 23 pulls the balance suspension rod 2 to adjust to a vertical attitude. The damping system 4 (including the damping plate 41, the fixed frame 42, and the connecting rod 43) absorbs the swing energy. According to Newton's laws of motion and the principles of fluid mechanics, the attitude is quickly and stably calibrated. The overall working mechanism of the device is clearly defined to ensure that when the buoy tilts, the electromagnetic current meter 5 installed at the bottom of the balance suspension rod 2 can maintain a vertically downward attitude through self-balancing adjustment, and the tilt angle is <10°. The damping system 4 effectively prevents the balance suspension rod 2 and the electromagnetic current meter 5 from swinging back and forth, shortens the attitude stabilization time, avoids dynamic measurement errors caused by continuous swinging, and ultimately ensures the accuracy of the flow velocity and flow direction data measured by the electromagnetic current meter 5. This solves the nonlinear error problem that traditional correction schemes cannot handle from a physical perspective.

[0041] When the self-balancing device for an electromagnetic current meter of the marine buoy of the present invention is in use, firstly, when the marine buoy undergoes rolling, pitching, or heaving motion under the action of wind and waves, the universal mounting base (including the base plate), which is fixed to the underwater buoy frame by U-shaped locking bolts, will tilt synchronously with the buoy. At this time, the universal hinge installed at the bottom of the base plate, as the core of mechanical linkage, activates its rotational degree of freedom, providing movement space for the subsequent attitude adjustment of the balance suspension rod; while the balance suspension rod, the counterweight at the bottom, and the damping system temporarily maintain their original vertical state due to inertia, forming an attitude difference with the tilted base, triggering the self-balancing mechanism of the device.

[0042] Under the influence of gravity, the counterweight at the bottom of the balance suspension rod begins to adjust its position towards the center of the earth, causing the balance suspension rod to rotate around the universal hinge: During this process, the electromagnetic current meter, which is rigidly connected to the U-shaped clamp, adjusts its attitude synchronously with the suspension rod.

[0043] When the balance suspension bar adjusts its attitude under the action of the counterweight, the damping system at the bottom simultaneously starts to dissipate energy. During the swing of the suspension rod, the damping plate with a regular pentagonal distribution always has at least one face facing the direction of ocean current movement. The fluid resistance generated by the seawater on the damping plate will quickly absorb the high-frequency energy transmitted by the waves to the suspension system, preventing the system from swinging back and forth like a pendulum.

[0044] After the energy dissipation of the damping system, the swing amplitude of the balance suspension rod decreases rapidly. Shortly after the buoy stops tilting, the counterweight stabilizes and points towards the center of the earth, the balance suspension rod remains vertical, and the electromagnetic current meter stabilizes in a vertically downward attitude (tilt angle < 10°). At this time, the electromagnetic current meter is not affected by the movement of the buoy and only measures the actual movement of the seawater relative to the vertical reference point of the Earth's center.

[0045] Finally, it should be noted that the electronic components in the electromagnetic current meter 5 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-balancing device for electromagnetic current meter for ocean buoy, comprising a universal fixed base (1), characterized in that: The bottom of the universal fixing base (1) is provided with a balance suspension rod (2), the bottom of the balance suspension rod (2) is provided with an electromagnetic current meter (5), the bottom of the electromagnetic current meter (5) is provided with a counterweight (23) and a damping system (4), the damping system (4) comprises a plurality of damping flat plates (41), the damping flat plates (41) surround a regular pentagon structure, at least one face of the damping flat plates (41) is opposite to the ocean current movement direction, further inhibiting and slowing down the swing speed of the balance suspension rod (2).

2. The electromagnetic current meter self-balancing arrangement for a marine buoy according to claim 1, characterized in that: The universal fixing base (1) comprises a base plate (11), the bottom of the base plate (11) is connected with the balance suspension rod (2) through a universal hinge (12).

3. The electromagnetic current meter self-balancing arrangement for a sea buoy according to claim 2, characterized in that: The two ends of the base plate (11) are provided with locking pieces (13), the locking pieces (13) are U-shaped structures, and the locking pieces (13) are fixedly connected with the underwater derrick of the buoy through bolts.

4. The electromagnetic ocean current meter self-balancing arrangement for a sea buoy according to claim 1, characterized in that: The balance suspension rod (2) comprises a rigid lightweight rod (21), the bottom of the rigid lightweight rod (21) is provided with a U-shaped clamp (22), and the bottom of the U-shaped clamp (22) is connected with the electromagnetic current meter (5).

5. The electromagnetic ocean current meter self-balancing arrangement for a sea buoy according to claim 4, characterized in that: The middle part of the counterweight (23) is provided with a threaded hole, and the threaded hole of the counterweight (23) is connected with the lowermost end of the electromagnetic current meter (5) in a threaded manner.

6. The electromagnetic ocean current meter self-balancing arrangement for a sea buoy of claim 1, characterized by: The inner side of the damping flat plate (41) is provided with a fixing frame (42), and the middle part of the fixing frame (42) is connected with the bottom of the counterweight (23) through a connecting rod (43).

7. The electromagnetic current meter self-balancing arrangement for a marine buoy according to claim 2, characterized in that: The electromagnetic current meter (5) and the U-shaped clamp (22) are detachably connected.

8. The electromagnetic ocean current meter self-balancing arrangement for a sea buoy according to claim 1, characterized in that: When the buoy tilts with waves, the top universal fixing base (1) tilts, the middle balance suspension rod (2) and the bottom counterweight (23) tend to keep the original vertical state under the action of inertia, the universal hinge (12) rotates, the counterweight (23) adjusts the position under the action of gravity and points to the center of the earth, so that the electromagnetic current meter (5) installed at the bottom of the balance suspension rod (2) keeps vertical downward, meanwhile, the damping system (4) absorbs the high-frequency energy transmitted by the waves, prevents the system from swinging back and forth, makes it quickly and stably stable in the vertical position, and ensures that the inclination angle of the electromagnetic current meter (5) is less than 10°.

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