A near shore seabed magnetic field detection system

Abstract

The utility model discloses a kind of nearshore seabed magnetic field detection systems, including central station control cabinet and seabed detection device;Seabed detection device includes base mechanism, locking mechanism, buoyancy mechanism and magnetic field detection mechanism;Buoyancy mechanism is used to carry out buoyancy support to magnetic field detection mechanism, and magnetic field detection mechanism is used to detect magnetic field;Locking mechanism is used to lock magnetic field detection mechanism, realize the levelness locking of magnetic field detection, and base mechanism is used to support on seabed;Central station control cabinet is electrically connected with magnetic field detection mechanism.The nearshore seabed magnetic field detection system utilizes the cooperation of locking mechanism and buoyancy mechanism, can utilize buoyancy to adjust the levelness of magnetic field detection mechanism, ensure the reliability of magnetic field detection.

Description

Technical Field

[0001] This utility model relates to a magnetic field detection system, and more particularly to a nearshore seabed magnetic field detection system. Background Technology

[0002] In the construction of a nearshore marine seismic integrated observation system, seabed magnetic field detection is a crucial step. This can be accomplished jointly by the central station control cabinet of an offshore wind power booster station and a magnetic field detection device. The magnetic field detection device is used for real-time, high-precision acquisition and transmission of magnetic field signals at the measurement location, while the central station control cabinet is used for remote control of the magnetic field detection device.

[0003] However, to conduct magnetic field detection on the seabed, the magnetic field detection device must first have good waterproof performance, and it must also be easy to install and place. Furthermore, it must be remotely controlled during the detection process to ensure the reliability and convenience of the detection. Utility Model Content

[0004] The purpose of this utility model is to provide a nearshore seabed magnetic field detection system that can reliably detect the magnetic field of the nearshore seabed and ensure the stable installation and placement of the detection device.

[0005] Technical Solution: The nearshore seabed magnetic field detection system of this utility model includes a central station control cabinet and a seabed detection device; the seabed detection device includes a base mechanism, a locking mechanism, a buoyancy mechanism, and a magnetic field detection mechanism; the buoyancy mechanism is installed at the lower part of the magnetic field detection mechanism to provide buoyancy support for the magnetic field detection mechanism, which is used to detect the magnetic field; the locking mechanism is installed at the top of the base mechanism to lock the magnetic field detection mechanism, achieving horizontal locking of the magnetic field detection, and the base mechanism is used to support it on the seabed; both the locking mechanism and the buoyancy mechanism are coordinated and controlled by the magnetic field detection mechanism; the central station control cabinet is electrically connected to the magnetic field detection mechanism.

[0006] Furthermore, the base mechanism includes a circular cone, a sealing sleeve, a counterweight, and an adapter; a sealed waterproof cavity is provided inside the circular cone; one end of the sealing sleeve extends through into the sealed waterproof cavity, and the adapter is fixed to the extended end; one end of the submarine cable is electrically connected to the central station control cabinet, and the other end is inserted from the other end of the sealing sleeve, with waterproof filler glue provided inside the sealing sleeve to seal the inserted end of the submarine cable; the submarine cable is electrically connected to the internal cable via the adapter, and the internal cable is electrically connected to the magnetic field detection mechanism; the counterweight is fixed to the inner bottom of the sealed waterproof cavity; multiple positioning rods are vertically arranged on the outer bottom of the circular cone.

[0007] Furthermore, the locking mechanism includes a locking drive motor, a locking seat, a drive ring, and at least one locking unit; the locking unit includes a locking rod, an eccentric wheel, and a pressing post; the locking seat is fixedly installed through-type at the top center of the circular cone, and the drive ring is rotatably installed on the bottom of the locking seat; the locking drive motor is fixed on the inner top of the circular cone, and a locking drive worm gear is mated and installed on the output shaft of the locking drive motor; the locking drive motor is driven and controlled by a magnetic field detection mechanism; a locking drive worm wheel that meshes with the locking drive worm gear is provided on the outer circumference of the drive ring; an adjustment cavity is provided inside the locking seat, and a hinge ball hole is provided between the adjustment cavity and the top of the locking seat, and a hinge ball is installed on the hinge ball hole. The head of the locking rod is a hinged ball head that protrudes from the upper and lower openings of the hinged ball hole. A magnetic field detection mechanism is mounted on the hinged ball head, and an internal cable passes through the hinged ball head. A pressing locking hole is provided on the wall of the hinged ball hole, and a pressing column is movably mounted on the pressing locking hole. A pressing cavity communicating with the pressing locking hole is provided in the locking seat. The upper end of the locking rod vertically passes through the pressing cavity. An eccentric wheel is fixedly mounted on the upper end of the locking rod and is located in the pressing cavity. One end of the pressing column presses against the wheel surface of the eccentric wheel, and the other end extends into the hinged ball hole. The lower end of the locking rod extends out of the locking seat, and a locking drive gear is fixedly provided on the extended end. A locking drive gear ring that meshes with the locking drive gear is provided on the inner circumference of the drive ring.

[0008] Furthermore, the magnetic field detection mechanism includes a fluxgate sensor, a control module, a waterproof housing, an adjustment drive unit, connecting columns, four magnetic force sensors, and four tubular cantilever arms. The fluxgate sensor is waterproofly installed at the center of the top of the waterproof housing. The four tubular cantilever arms are arranged in a cross shape and vertically installed on the four sides of the waterproof housing. The upper end of the connecting column is rotatably installed through the bottom center of the waterproof housing. The control module and the adjustment drive unit are both installed inside the waterproof housing. The adjustment drive unit is used to adjust the relative rotation between the connecting column and the waterproof housing. Vertical tubes are vertically installed at the cantilever ends of the four tubular cantilever arms, and waterproof sensor housings are installed at the top of the four vertical tubes. The four magnetic force sensors are fixed inside the four waterproof sensor housings, and the magnetic force sensors are electrically connected to the control module after passing through the vertical tubes and tubular cantilever arms in sequence via sensor connection lines. The adjustment drive unit is driven and controlled by the control module.

[0009] Furthermore, the adjustment drive unit includes an adjustment drive motor, an adjustment worm, and an adjustment worm wheel; the adjustment drive motor is mounted on the inner wall of the waterproof square shell, and the adjustment worm is connected to the output shaft end of the adjustment drive motor; the adjustment worm wheel is mounted on the connecting column, and the adjustment worm wheel meshes with the adjustment worm; the adjustment drive motor is driven and controlled by the control module.

[0010] Furthermore, the buoyancy mechanism includes an annular protective shell, an annular airbag, an annular air tank, a first electromagnetic valve, and an annular electrical control shell; the central annular hole of the annular protective shell is fixed to the outer wall of the connecting column, and an exhaust hole is provided on the outer wall of the annular protective shell; the annular air tank is fixed to the lower inner side of the annular protective shell, and the annular electrical control shell is fixed to the upper inner side of the annular protective shell, and the annular air tank and the annular electrical control shell together form an inner support ring; the annular airbag is installed inside the annular protective shell and fixed to the outer circumferential surface of the inner support ring; an inflation pipe is connected between the annular airbag and the annular air tank, and the inflation pipe passes through the annular electrical control shell; the first electromagnetic valve is located inside the annular electrical control shell and connected in series with the inflation pipe, and the first electromagnetic valve is driven and controlled by the control module.

[0011] Compared with the prior art, the advantages of this utility model are: the base mechanism can achieve stable support for the seabed detection device, ensuring stability during seabed magnetic field detection; the communication connection between the central station control cabinet and the magnetic field detection mechanism can realize the transmission of detection data and the power supply of the seabed detection device; and the combination of the locking mechanism and the buoyancy mechanism can use buoyancy to adjust the level of the magnetic field detection mechanism, ensuring the reliability of magnetic field detection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the seabed detection device of this utility model;

[0013] Figure 2 This is a cross-sectional view of the base mechanism of this utility model;

[0014] Figure 3 This is a schematic diagram of the buoyancy mechanism installation structure of this utility model;

[0015] Figure 4 This is a schematic cross-sectional view of the buoyancy mechanism of this utility model.

[0016] Figure 5 This is a cross-sectional view of the locking mechanism of this utility model;

[0017] Figure 6 This is a cross-sectional structural diagram of the buoyancy mechanism of this utility model;

[0018] Figure 7 This is a schematic diagram of the magnetic field detection mechanism of this utility model;

[0019] Figure 8 This is a schematic cross-sectional view of the tubular cantilever arm of this utility model;

[0020] Figure 9 This is a schematic diagram of the circuit structure of this utility model. Detailed Implementation

[0021] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited to the described embodiments.

[0022] like Figure 1-9 As shown, the nearshore seabed magnetic field detection system disclosed in this utility model includes: a central station control cabinet and a seabed detection device; the seabed detection device includes a base mechanism, a locking mechanism, a buoyancy mechanism, and a magnetic field detection mechanism; the buoyancy mechanism is installed at the lower part of the magnetic field detection mechanism to provide buoyancy support for the magnetic field detection mechanism, which is used to detect the magnetic field; the locking mechanism is installed at the top of the base mechanism to lock the magnetic field detection mechanism, thereby achieving horizontal locking of the magnetic field detection, and the base mechanism is used to support the system on the seabed; both the locking mechanism and the buoyancy mechanism are coordinated and controlled by the magnetic field detection mechanism; the central station control cabinet and the magnetic field detection mechanism are electrically connected via a seabed cable 4.

[0023] The base mechanism provides stable support for the seabed detection device, ensuring stability during seabed magnetic field detection. The communication connection between the central station control cabinet and the magnetic field detection mechanism enables the transmission of detection data and the power supply to the seabed detection device. The combination of the locking mechanism and the buoyancy mechanism allows for the adjustment of the horizontality of the magnetic field detection mechanism using buoyancy, ensuring the reliability of magnetic field detection.

[0024] like Figure 1 and 2 As shown, the base mechanism further includes a circular cone 1, a sealing sleeve 2, a counterweight 15, and an adapter 16; a sealed waterproof cavity is provided inside the circular cone 1; one end of the sealing sleeve 2 extends into the sealed waterproof cavity, and the adapter 16 is fixed to the extended end; one end of the submarine cable 4 is electrically connected to the central station control cabinet, and the other end is inserted from the other end of the sealing sleeve 2, and waterproof filler is provided inside the sealing sleeve 2 to seal the inserted end of the submarine cable 4; the submarine cable 4 is electrically connected to the internal cable 18 through the adapter 16, and the internal cable 18 is electrically connected to the magnetic field detection mechanism; the counterweight 15 is fixed to the inner bottom of the sealed waterproof cavity; multiple positioning rods 11 are vertically arranged on the outer bottom of the circular cone 1, and the lower end of the positioning rods 11 is provided with a spike end 12; a guide pipe 13 is vertically arranged between the upper and lower sides of the circular cone 1, and the lower end of the guide pipe 13 is provided as a conical hood 14.

[0025] The sealing sleeve 2 facilitates the potting and sealing of the submarine cable 4; the combination of the guide pipe 13 and the conical hood 14 facilitates the flow of water during the downward release process in seawater, reduces the swaying of the circular cone 1 caused by the seawater resistance on the lower side, and ensures the stability of the downward release; the use of the counterweight 15 and multiple positioning rods 11 ensures the stability of the base mechanism on the seabed.

[0026] like Figure 1 As shown, two lifting lugs 3 are further provided on the top edge of the circular cone 1, which facilitates the overall adjustment of the base mechanism and slow release to the nearshore seabed.

[0027] like Figure 2-5 As shown, the locking mechanism further includes a locking drive motor 23, a locking seat 20, a drive ring 21, and four locking units; each locking unit includes a locking rod 34, an eccentric wheel 33, and a pressing post 32; the locking seat 20 is fixedly installed through the top center of the circular cone 1, and an annular protrusion 35 is provided at the bottom edge of the locking seat 20; the drive ring 21 is rotatably installed on the bottom of the locking seat 20 by rotating it onto the annular protrusion 35; the locking drive motor 23 is fixed on the inner top of the circular cone 1, and the locking drive motor 23 is fixed to the bottom center of the circular cone 1. A locking drive worm gear 22 is mounted on the output shaft of the motor 23, and the locking drive motor 23 is driven and controlled by the magnetic field detection mechanism. A locking drive worm wheel 36 that meshes with the locking drive worm gear 22 is provided on the outer circumference of the drive ring 21. An adjustment cavity 26 is provided inside the locking seat 20, and a hinge ball hole 27 is provided between the adjustment cavity 26 and the top of the locking seat 20. A hinge ball head 28 is installed on the hinge ball hole 27, and the hinge ball head 28 protrudes from the upper and lower side openings of the hinge ball hole 27. The lower end of the connecting column 29 of the magnetic field detection mechanism is mounted on the hinge. An internal cable 18 passes through the hinged ball head 28; at least one cable waterproof sealing ring is provided at each penetration point of the internal cable 18; a press-locking hole is provided on the wall of the hinged ball hole 27, and a press-locking post 32 is movably installed on the press-locking hole; a press-locking cavity 31 communicating with the press-locking hole is provided in the locking seat 20, and a locking rod 34 is rotatably installed in the locking seat 20, with the upper end of the locking rod 34 vertically penetrating the press-locking cavity 31; an eccentric wheel 33 is fixedly installed on the upper end of the locking rod 34, and the eccentric wheel 33 is located on the press-locking cavity 31. The pressure cavity 31 is filled with pressure; one end of the pressing column 32 presses against the wheel surface of the eccentric wheel 33, and the other end extends into the hinge ball hole 27 to press and lock the hinge ball head 28; the lower end of the locking rod 34 extends out of the locking seat 20, and a locking drive gear 25 is fixedly installed on the extended end; a locking drive gear ring 24 that meshes with the locking drive gear 25 is provided on the inner circumference of the drive ring 21; a waterproof cover 17 is provided on the inner top of the circular cone 1, and the locking drive motor 23, the bottom of the locking seat 20 and the drive ring 21 are all located inside the waterproof cover 17.

[0028] The four locking units enable synchronous pressing and locking of the articulated ball head 28 at four points, ensuring reliable locking after horizontal orientation adjustment. The four rotating locking rods 34 facilitate waterproof installation. The locking drive gear ring 24 meshes synchronously with the four locking drive gears 25, driving the four locking rods 34 to rotate synchronously. This, in turn, allows the four eccentric wheels 33 to push the four pressing posts 32 synchronously, achieving pressing and locking of the articulated ball head 28. The articulated ball head 28 protrudes from the upper and lower openings of the articulated ball hole 27, facilitating the connection of the connecting post 29 for the magnetic field detection mechanism on the upper side and the connection of the internal cable 18 through the lower side. The adjustment cavity 26 allows the internal cable 18 to swing freely during the rotation of the articulated ball head 28, accommodating redundant internal cables 18.

[0029] like Figure 5 As shown, a horn-shaped groove 30 is further provided on the lower side of the hinge ball head 28 and at the entrance of the internal cable 18, so as to facilitate the rotation and swing adjustment of the hinge ball head 28 and reduce the pulling on the internal cable 18.

[0030] like Figure 4 and 5 As shown, a rod sealing ring 37 is further provided inside the locking seat 20 and on each locking rod 34 to prevent water leakage into the interior along the locking rod 34.

[0031] like Figure 3 and 4 As shown, the magnetic field detection mechanism further includes a control module, a waterproof square shell 59, an adjustment drive unit, a connecting column 29, four magnetic sensors 66, and four tubular cantilever arms 62; the four tubular cantilever arms 62 are arranged in a cross shape and vertically installed on the four sides of the waterproof square shell 59; the upper end of the connecting column 29 is rotatably installed through the bottom center of the waterproof square shell 59, and a waterproof seal is provided at the through position; the control module and the adjustment drive unit are both installed inside the waterproof square shell 59; the adjustment drive unit is used to drive the connecting column 29 to rotate relative to the waterproof square shell 59, facilitating north-finding; in the four Each cantilever arm 62 has a vertically installed vertical tube 64 at its cantilever end. A waterproof sensor housing 63 is installed at the top of each of the four vertical tubes 64. Four magnetic sensors 66 are fixed inside the four waterproof sensor housings 63. When the cantilever arm 62 is in a horizontal state, the corresponding magnetic sensor 66 is also in a horizontal state. The X-axis direction of the magnetic sensor 66 is parallel to the axis of the cantilever arm 62. The magnetic sensor 66 is electrically connected to the control module after passing through the vertical tubes 64 and the cantilever arm 62 in sequence via a sensor connection wire. The adjustment drive unit is driven and controlled by the control module.

[0032] The four magnetic sensors 66 can detect the magnetic field in four orthogonal directions, meeting the needs of omnidirectional magnetic field measurement in the seabed; the adjustment drive unit can adjust the relative rotation of the connecting column 29 and the waterproof square shell 59, thereby realizing the north-finding adjustment of the magnetic field detection mechanism.

[0033] like Figure 8 As shown, the waterproof sensor housing 63 further includes a horizontal mounting cavity that communicates with the vertical tube 64; the magnetic sensor 66 is installed in the horizontal mounting cavity, and the terminals of the magnetic sensor 66 are electrically connected to the sensor connection line.

[0034] like Figure 4 and 9 As shown, the control module further includes a circuit board 71 and a battery module 70. The circuit board 71 is equipped with a controller, a memory, a charging and discharging circuit, a communication module, a north finder, a level, an adjustment drive circuit, and a locking drive circuit. The north position of the north finder is the same as the horizontal direction of one of the tubular cantilever arms 62. The controller is electrically connected to the memory, the communication module, the north finder, the level, the adjustment drive circuit, and the locking drive circuit. The battery module 70 supplies power to the controller, the memory, the communication module, the north finder, the level, the adjustment drive circuit, and the locking drive circuit through the charging and discharging circuit. The adjustment drive circuit and the locking drive circuit are electrically connected to the adjustment drive motor 56 and the locking drive motor 23, respectively, for rotating the adjustment drive motor 56 and the locking drive motor 23. A level can be used to check the levelness of the waterproof square shell 59. When the waterproof square shell 59 is level, the four horizontally extended tubular cantilever arms 62 are also level. A north finder is used to determine the north direction. When the north finder rotates horizontally and points to due north, the corresponding tubular cantilever arms 62 also point to due north.

[0035] like Figure 4 As shown, the adjustment drive unit further includes an adjustment drive motor 56, an adjustment worm 53, and an adjustment worm wheel 55; the adjustment drive motor 56 is mounted on the inner wall of the waterproof square shell 59, and the adjustment worm 53 is mated to the output shaft end of the adjustment drive motor 56; the adjustment worm wheel 55 is mounted on the connecting column 29, and the adjustment worm wheel 55 meshes with the adjustment worm 53; the adjustment drive motor 56 is driven and controlled by the control module.

[0036] By utilizing the coordination of the adjusting worm gear 55 and the adjusting worm 53, both rotational drive and positioning locking can be achieved, ensuring the stability after north-seeking adjustment.

[0037] like Figure 3 , 4As shown in Figure 6, the buoyancy mechanism further includes an annular protective shell 39, an annular airbag 41, an annular air tank 40, a first electromagnetic valve 46, and an annular electrical control shell 44. The central annular hole of the annular protective shell 39 is fixed to the outer wall of the connecting column 29, and an exhaust hole 51 is provided on the outer wall of the annular protective shell 39. The annular air tank 40 is fixed to the lower inner side of the annular protective shell 39, and the annular electrical control shell 44 is fixed to the upper inner side of the annular protective shell 39. The annular air tank 40 and the annular electrical control shell 44 together form an inner support ring. The annular airbag 41 is installed inside the annular protective shell 39 and fixed to the outer circumferential surface of the inner support ring. An inflation pipe 49 is connected between the annular airbag 41 and the annular air tank 40, and the inflation pipe 49 passes through the annular electrical control shell 44. The first electromagnetic valve 46 is located inside the annular electrical control shell 44 and connected in series with the inflation pipe 49. The first electromagnetic valve 46 is driven and controlled by the control module.

[0038] The annular gas tank 40 and the annular electrical control shell 44 together form an inner support ring, which can stably support and fix the annular airbag 41. The first electromagnetic valve 46 and the inflation tube 49 can be used to inflate the annular airbag 41 with high-pressure gas in the annular gas tank 40, which increases the buoyancy. Due to the annular structure, the connecting column 29 has a relatively stable vertical buoyancy. The annular protective shell 39 can protect the annular airbag 41 to prevent excessive expansion and deformation, and ensure the vertical stability of buoyancy. The exhaust port 51 can quickly discharge seawater when the annular airbag 41 inflates.

[0039] like Figure 4 and 6 As shown, furthermore, an exhaust pipe 99 is installed inside the annular electronic control housing 44, with one end of the exhaust pipe 99 connected to the annular airbag 41 and the other end connected to the outside of the annular protective housing 39. A second electromagnetic valve 98 and a first one-way valve 97 are connected in series on the exhaust pipe 99. The second electromagnetic valve 98 is driven and controlled by the control module. Through the cooperation of the second electromagnetic valve 98 and the exhaust pipe 99, after the horizontal adjustment is completed and the vertical locking connecting column 29 is completed, the second electromagnetic valve 98 can be opened to release the gas in the annular airbag 41 under the action of water pressure, thereby reducing the volume of the buoyancy mechanism and reducing the interference of the seabed current on the detection system. The first one-way valve 97 can prevent seawater from entering the annular airbag 41.

[0040] In the nearshore seabed magnetic field detection system disclosed in this utility model, all four magnetic sensors are high-precision triaxial digital magnetic sensors of model QMC5883. The magnetic sensors communicate with the controller via the I2C communication protocol. The controller uses an existing ARM controller module. The north finder uses an existing digital north finder to meet the north-pointing adjustment needs. The level uses an existing digital level to achieve levelness acquisition. The first electromagnetic valve 46 and the second electromagnetic valve 98 both use existing electromagnetic valves to achieve airflow control. The adjustment drive circuit and the locking drive circuit both use existing stepper motor drive circuits to perform step-by-step drive control on the two stepper motors, adjustment drive motor 56 and locking drive motor 23, respectively. The communication module uses an existing network communication module, such as an existing RS422 communication module, RS485 communication module, or RJ45 communication module, which can fully meet the communication requirements at a depth of 50 meters near the shore.

[0041] The nearshore seabed magnetic field detection system disclosed in this utility model includes the following steps when in use:

[0042] Step 1: The seabed detection device is placed on the near-shore seabed by hoisting the base mechanism. At this time, the positioning rod 11 under the circular cone 1 is inserted into the seabed mud, and then the detection command is sent to the magnetic field detection mechanism through the central station control cabinet.

[0043] Step 2: The control module of the magnetic field detection mechanism sends a control command to the first electromagnetic valve 46 of the buoyancy mechanism, causing a portion of the high-pressure gas in the annular gas tank 40 to be released into the annular air bladder 41, so that the annular air bladder 41 is fully inflated inside the annular protective shell 39. Then the first electromagnetic valve 46 is closed to achieve buoyancy support for the magnetic field detection mechanism, so that the connecting column 29 is in a vertical state under the action of buoyancy, thereby completing the horizontal adjustment of the magnetic field detection mechanism.

[0044] Step 3: The control module of the magnetic field detection mechanism sends a locking command to the locking mechanism, thereby locking the vertical connecting column 29 to maintain the horizontal state of the magnetic field detection mechanism. Then, the control module sends a control command to the second electromagnetic valve 98 to release the gas in the annular airbag 41 under the action of water pressure, thereby reducing the volume of the buoyancy mechanism and reducing the interference of the ocean current on the detection system.

[0045] Step 4: The control module of the magnetic field detection mechanism drives the adjustment drive motor 56 of the adjustment drive unit. At the same time, the north finder of the control module monitors the north-pointing status in real time. When the north finder indicates that the current state is due north, the adjustment drive motor 56 is stopped. At this time, the four tubular cantilever arms 62 point to the east, west, south and north directions respectively.

[0046] Step 5: The control module of the magnetic field detection mechanism acquires the magnetic field data collected by the four magnetic sensors 66. During the magnetic field data acquisition process, the level of the control module monitors the level in real time. If the current level changes beyond the threshold range compared to the initial level state (i.e., the level when it was first locked), for example, the threshold range is set to 3°. If it is greater than 3°, proceed to step 6; otherwise, proceed to step 7.

[0047] Step 6: The control module sends an unlocking command to the locking mechanism, which unlocks the connecting column 29. The control module sends a control command to the first electromagnetic valve 46 of the buoyancy mechanism, causing a portion of the high-pressure gas in the annular gas tank 40 to be released into the annular airbag 41, causing the annular airbag 41 to fully inflate within the annular protective shell 39, thus providing buoyancy support for the magnetic field detection mechanism. This allows the connecting column 29 to be in a vertical position under the action of buoyancy. Then, the control module sends a locking command to the locking mechanism, which locks the vertically positioned connecting column 29, restoring the magnetic field detection mechanism to a horizontal state. Then, the process returns to step 4.

[0048] Step 7: After the magnetic field strength data acquisition for a certain period is completed, the central station control cabinet sends a termination command to the control module of the magnetic field detection mechanism. The control module then communicates with the central station control cabinet through the communication module to upload the acquired magnetic field data.

[0049] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A nearshore seabed magnetic field detection system, characterized in that: It includes a central station control cabinet and a seabed detection device; the seabed detection device includes a base mechanism, a locking mechanism, a buoyancy mechanism, and a magnetic field detection mechanism; the buoyancy mechanism is installed at the bottom of the magnetic field detection mechanism to provide buoyancy support for the magnetic field detection mechanism, which is used to detect the magnetic field; the locking mechanism is installed at the top of the base mechanism to lock the magnetic field detection mechanism, achieving horizontal locking of the magnetic field detection, and the base mechanism is used to support it on the seabed; both the locking mechanism and the buoyancy mechanism are coordinated and controlled by the magnetic field detection mechanism; the central station control cabinet is electrically connected to the magnetic field detection mechanism.

2. The nearshore seabed magnetic field detection system according to claim 1, characterized in that: The base mechanism includes a circular cone (1), a sealing sleeve (2), a counterweight (15), and an adapter (16); a sealed waterproof cavity is provided inside the circular cone (1); one end of the sealing sleeve (2) extends into the sealed waterproof cavity, and the adapter (16) is fixed on the extended end; one end of the submarine cable (4) is electrically connected to the central station control cabinet, and the other end is inserted from the other end of the sealing sleeve (2), and a waterproof filler is provided inside the sealing sleeve (2) to seal the insertion end of the submarine cable (4); the submarine cable (4) is electrically connected to the internal cable (18) through the adapter (16), and the internal cable (18) is electrically connected to the magnetic field detection mechanism; the counterweight (15) is fixed on the inner bottom of the sealed waterproof cavity; multiple positioning rods (11) are vertically arranged on the outer bottom of the circular cone (1).

3. The nearshore seabed magnetic field detection system according to claim 2, characterized in that: The locking mechanism includes a locking drive motor (23), a locking seat (20), a drive ring (21), and at least one locking unit; the locking unit includes a locking rod (34), an eccentric wheel (33), and a pressing post (32); the locking seat (20) is fixedly installed through the top center of the circular cone (1), and the drive ring (21) is rotatably installed on the bottom of the locking seat (20); the locking drive motor (23) is fixed on the inner top of the circular cone (1), and the locking drive motor (24) is fixed on the bottom center of the circular cone (1). 3) A locking drive worm gear (22) is mounted on the output shaft, and the locking drive motor (23) is driven and controlled by the magnetic field detection mechanism; a locking drive worm wheel (36) that meshes with the locking drive worm gear (22) is provided on the outer circumference of the drive ring (21); an adjustment cavity (26) is provided inside the locking seat (20), and a hinge ball hole (27) is provided between the adjustment cavity (26) and the top of the locking seat (20), and a hinge ball head (28) is installed on the hinge ball hole (27). The hinged ball head (28) protrudes from the upper and lower side openings of the hinged ball hole (27); the magnetic field detection mechanism is installed on the hinged ball head (28), and the internal cable (18) passes through the hinged ball head (28); a pressing locking hole is provided on the hole wall of the hinged ball hole (27), and the pressing column (32) is movably installed on the pressing locking hole; a pressing cavity (31) communicating with the pressing locking hole is provided in the locking seat (20), and the upper end of the locking rod (34) vertically passes through the pressing cavity (31), and the eccentric wheel ( 33) The locking rod (34) is fixedly installed on the upper end of the locking rod (34), and the eccentric wheel (33) is located in the pressing cavity (31); one end of the pressing column (32) presses on the wheel surface of the eccentric wheel (33), and the other end extends into the hinge ball hole (27); the lower end of the locking rod (34) extends out of the locking seat (20), and a locking drive gear (25) is fixedly installed on the extended end, and a locking drive gear ring (24) that meshes with the locking drive gear (25) is provided on the inner circumference of the drive ring (21).

4. The nearshore seabed magnetic field detection system according to claim 2, characterized in that: The magnetic field detection mechanism includes a control module, a waterproof square shell (59), an adjustment drive unit, a connecting column (29), four magnetic sensors (66), and four tubular cantilever arms (62); the four tubular cantilever arms (62) are arranged in a cross shape and vertically installed on the four sides of the waterproof square shell (59); the upper end of the connecting column (29) is rotated through and installed at the bottom center of the waterproof square shell (59); the control module and the adjustment drive unit are both installed inside the waterproof square shell (59); the adjustment drive unit is used to adjust the connecting column ( 29) Relative to the waterproof square shell (59); vertical tubes (64) are vertically installed on the cantilever ends of the four tubular cantilever arms (62), and waterproof sensor shells (63) are installed on the top of the four vertical tubes (64). Four magnetic sensors (66) are fixed in the four waterproof sensor shells (63), and the magnetic sensors (66) are electrically connected to the control module after passing through the vertical tubes (64) and the tubular cantilever arms (62) in sequence via sensor connection lines; the adjustment drive unit is driven and controlled by the control module.

5. The nearshore seabed magnetic field detection system according to claim 4, characterized in that: The adjustment drive unit includes an adjustment drive motor (56), an adjustment worm (53), and an adjustment worm wheel (55); the adjustment drive motor (56) is mounted on the inner wall of the waterproof square shell (59), and the adjustment worm (53) is connected to the output shaft end of the adjustment drive motor (56); the adjustment worm wheel (55) is mounted on the connecting column (29), and the adjustment worm wheel (55) meshes with the adjustment worm (53); the adjustment drive motor (56) is driven and controlled by the control module.

6. The nearshore seabed magnetic field detection system according to claim 4, characterized in that: The buoyancy mechanism includes an annular protective shell (39), an annular airbag (41), an annular air tank (40), a first electromagnetic air valve (46), and an annular electrical control shell (44). The central annular hole of the annular protective shell (39) is fixed to the outer wall of the connecting column (29), and an exhaust hole (51) is provided on the outer wall of the annular protective shell (39). The annular air tank (40) is fixed to the lower inner side of the annular protective shell (39), and the annular electrical control shell (44) is fixed to the upper inner side of the annular protective shell (39). (40) and the annular electric control shell (44) together form the inner support ring; the annular airbag (41) is installed inside the annular protective shell (39) and fixed on the outer circumference of the inner support ring; an inflation tube (49) is connected between the annular airbag (41) and the annular air tank (40), and the inflation tube (49) passes through the annular electric control shell (44); the first electromagnetic valve (46) is located inside the annular electric control shell (44) and connected in series on the inflation tube (49), and the first electromagnetic valve (46) is driven and controlled by the control module.

Images