A seabed seismic detection device and detection method

Abstract

This invention discloses a submarine earthquake detection device and method, relating to the field of submarine earthquake detection technology. The device includes: a coupling frame and a submarine seismograph. The coupling frame has a downward-facing opening slot for embedding into seabed strata. The submarine seismograph is connected to the coupling frame and includes a detection module, a housing, a wave plate, a movable connector, and a transmission support. The detection module is located inside the housing and abuts against the inner wall of the housing. One side of the transmission support is connected to the housing, and the other side is connected to the coupling frame, separating the housing from the coupling frame. The wave plate is connected to the side of the housing near the transmission support. One side of the movable connector is connected to the wave plate, and the other side is connected to the coupling frame. The coupling frame, wave plate, movable connector, and housing constitute an elastic system for transmitting detected waves. This application improves the sensitivity of the submarine seismograph in detecting seismic shear waves or converted shear waves, and enhances the reliability of the submarine seismograph in detecting seismic waves.

Description

Technical Field

[0001] This invention relates to the field of submarine earthquake detection technology, and in particular to a submarine earthquake detection device and a detection method using the submarine earthquake detection device. Background Technology

[0002] Submarine seismic detection technology is fundamental to marine seismology, aiming to detect, locate, and analyze earthquakes and plate tectonics occurring on the seabed. Since oceans cover 71% of the Earth's surface, and approximately 90% of global earthquakes occur in the Pacific Ocean and surrounding seas, submarine seismic detection technology is crucial for scientific research and disaster early warning. Submarine seismometers are the most direct and classic devices for detecting seismic waves. By placing them directly on the seabed, they avoid the attenuation and interference of seawater layers on seismic waves, clearly recording microseisms and fine crustal structures. Submarine seismometers are divided into self-contained and tethered types. Self-contained seismometers are deployed to the seabed, autonomously record data, and are recovered after several months of operation. Tethered seismometers transmit data in real time via submarine cables, enabling long-term, real-time monitoring, but are more expensive. The advantages of submarine seismometers are: direct placement on the seabed, avoiding the attenuation and interference of seawater layers on seismic waves, and clearly recording microseisms and fine crustal structures.

[0003] In existing technologies, self-contained seabed seismometers are deployed on the seabed. Unlike those deployed on land, the detectors of self-contained seabed seismometers deployed on the seabed are not buried deep underground, but are placed inside the shell of the self-contained seabed seismometer. This results in poor coupling between the self-contained seabed seismometer and the elastic medium (seabed), which is not conducive to the detection of seismic shear waves (S-waves) or converted shear waves (PS-waves), thus affecting the exploration of marine resources. Summary of the Invention

[0004] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. Therefore, the object of the present invention is to provide a submarine earthquake detection device that improves the elastic coupling effect between the submarine seismograph and the seabed strata, enhances the sensitivity of the submarine seismograph in detecting seismic shear waves (S-waves) or converted shear waves (PS-waves), improves the sensitivity and signal-to-noise ratio of shear wave signal pickup, and enhances the reliability of the submarine seismograph in detecting seismic waves.

[0005] The present invention also provides a detection method using the above-mentioned submarine earthquake detection device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A submarine earthquake detection device, comprising: A sinking frame, wherein the sinking frame is provided with a downward-facing opening groove, the opening groove being used to embed into the seabed strata; A seabed seismograph, connected to a coupling frame, includes a detection module, a housing, a wave plate, a movable connector, and a transmission support. The detection module is located inside the housing and abuts against the inner wall of the housing. One side of the transmission support is connected to the housing, and the other side is connected to the coupling frame, separating the housing from the coupling frame. The wave plate is connected to the side of the housing near the transmission support. One side of the movable connector is connected to the wave plate, and the other side is connected to the coupling frame. The wave plate includes a wave plate body, multiple buffers and multiple first fasteners. The multiple buffers are located on the side of the wave plate body away from the housing. The multiple first fasteners pass through the multiple buffers and the wave plate body in sequence and are connected to the housing. The coupling frame, wave plate, movable connector, and housing constitute an elastic system for transmitting the detection wave.

[0007] The beneficial effects of the submarine seismic detection device provided by this invention are as follows: This application connects the submarine seismograph to the coupling frame. By providing a downward-facing opening slot on the coupling frame, the submarine seismograph can be directly embedded into the seabed strata through the opening slot, forming a stable mechanical fit between the device and the strata. This improves the elastic coupling effect between the submarine seismograph and the seabed strata, and enhances the sensitivity of the submarine seismograph in detecting seismic shear waves (S-waves) or converted shear waves (PS-waves). Simultaneously, the coupling frame, wave plate, movable connecting parts, and shell together constitute a complete elastic system for transmitting shear waves. When submarine seismic waves are transmitted to the coupling frame through the opening slot, the seismic waves are sequentially transmitted through the wave plate... The vibration plates and movable connectors transmit the signals to the shell, and are ultimately received by the detection module installed inside the shell. This allows the vibration signals of seismic shear waves (S-waves) and converted shear waves (PS-waves) to be transmitted to the detection module more completely and faithfully, improving the pickup sensitivity and signal-to-noise ratio of shear wave signals and enhancing the reliability of the seabed seismograph in detecting seismic waves. In addition, the wave plate can not only transmit seismic waves, but also absorb the residual vibrations generated by the shell when they are transmitted to the wave plate body. The damping buffer formed by the buffer and the wave plate body can absorb the residual vibrations generated by the shell, thereby solving the tail vibration and low-frequency resonance caused by the rigid contact between the wave plate and the shell, and improving the quality of seismic wave detection by the seabed seismograph.

[0008] As described above, the submarine seismic detection device includes a first shell and a second shell, which enclose a spherical cavity; the submarine seismometer also includes a spherical chamber, and the detection module is disposed inside the spherical chamber, which movably abuts against the spherical cavity.

[0009] As described above, the detection module of the submarine earthquake detection device includes a PCB board and a shear wave detection structure. The shear wave detection structure is located inside the sphere, and the PCB board is connected to the shear wave detection structure.

[0010] As described above, a submarine earthquake detection device includes a transverse wave detection structure comprising a conductive housing and a seismometer. A PCB board is connected to the outside of the conductive housing, the seismometer is connected inside the conductive housing and electrically connected to the PCB board, and the conductive housing is connected inside the sphere.

[0011] As described above, the detection module of the submarine earthquake detection device further includes a hydrophone, which is disposed on the side of the first housing away from the second housing.

[0012] As described above, in a submarine earthquake detection device, the first housing is provided with a plurality of water inlets recessed toward the interior of the first housing, and the plurality of water inlets are spaced apart along the circumference of the first housing and are respectively connected to the spherical cavity.

[0013] As described above, in a submarine earthquake detection device, the second housing is provided with a plurality of first limiting protrusions extending toward the center line of the second housing, the plurality of first limiting protrusions being spaced apart along the circumference of the second housing, and the spherical chamber abutting against the plurality of first limiting protrusions.

[0014] As described above, in a submarine earthquake detection device, the movable connector is provided with a hook for connecting to the sinking frame and a rotating locking member for locking the hook on the side facing the sinking frame. The rotating locking member is rotatably connected to the opening of the hook.

[0015] As described above, in a submarine earthquake detection device, the transmission support includes multiple first support rods, multiple second support rods, and multiple transmission locking components. The connection between the first housing and the second housing is provided with a first folded edge and a second folded edge, respectively. The multiple first support rods surround and pass through the first folded edge and the second folded edge. The multiple transmission locking components are connected to the side of the multiple first support rods near the first folded edge. The multiple second support rods are respectively connected to two adjacent first support rods.

[0016] As described above, in a submarine seismic detection device, the coupling frame includes a support structure and an auxiliary support plate structure. The support structure includes a first support and at least two second supports. Along the width direction of the first support, at least two second supports are arranged opposite to each other on both sides of the first support, forming at least four first mounting positions. The auxiliary support plate structure includes at least four first auxiliary support plates. The at least four first auxiliary support plates are respectively connected to the at least four first mounting positions along the circumference of the support structure, forming a closed contact surface.

[0017] As described above, in a submarine earthquake detection device, the first auxiliary support plate has a first surface and a second surface facing each other, and each first auxiliary support plate has at least one first leveling component, which passes through the first surface and the second surface to perform leveling.

[0018] As described above, the submarine seismic detection device further includes a first transmission component for connecting the submarine seismograph. The first transmission component is disposed on the side of the support structure near the second surface. One end of the first transmission component is detachably connected to the support structure, and the other end is connected to a movable connector.

[0019] As described above, in a submarine earthquake detection device, the support structure is further provided with a first connection position on the side near the second surface, and the conductive support is connected to the first connection position.

[0020] As described above, in a submarine earthquake detection device, the first leveling component includes a first leveling plate and a first connecting member. The first connecting member is connected to the first auxiliary support plate, and the first leveling plate is connected to the first connecting member and abuts against the first auxiliary support plate.

[0021] As described above, in a submarine earthquake detection device, the first auxiliary support plate and the first adjusting plate are provided with an adjustment hole group at the contact point, and the first adjusting plate abuts against the adjustment hole group.

[0022] The present invention also provides a detection method, which uses a submarine earthquake detection device as described above for detection, and includes the following steps: The unmanned probe is lowered to the target sea area for exploration, and then the corresponding coupling frame is selected; Connect the submarine earthquake detection device to the control box, configure the parameters through the control box, and perform tests. After the testing is completed, the submarine earthquake detection device will be transported to the target sea area for deployment; After the seabed seismic detection device sinks to the seabed strata and embeds itself, the seabed seismic detection device automatically enters the working mode to collect information; Once the submarine earthquake detection device enters the working mode, the coupling frame transmits submarine seismic waves to the wave plate, the wave plate transmits the submarine seismic waves to the shell through the movable connector, and the detection module collects and stores the submarine seismic waves. After the seabed seismic detection device has been lowered for a preset time, it is retrieved and connected to the control box to export the detection data, thus completing the detection.

[0023] The beneficial effects of the detection method using the aforementioned submarine seismic detection device provided by this invention are as follows: The detection method utilizes an elastic system composed of a coupling frame, a wave plate, a movable connector, and a shell. When submarine seismic waves are transmitted to the coupling frame through the opening slot, the seismic waves are sequentially transmitted through the wave plate and the movable connector to the shell, and finally received by the detection module abutting inside the shell. This allows the vibration signals of seismic shear waves (S-waves) and converted shear waves (PS-waves) to be transmitted to the detection module more completely and faithfully, improving the pickup sensitivity and signal-to-noise ratio of shear wave signals and enhancing the reliability of the submarine seismograph in detecting seismic waves. Simultaneously, the design of the coupling frame, which can be recovered along with the submarine seismograph, effectively reduces the operating cost of the submarine seismic detection device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 For the corresponding Figure 1 A structural diagram from another direction; Figure 3 For the corresponding Figure 2 A schematic diagram of the structure of part A; Figure 4 This is an exploded view of the structure of Embodiment 1 of the present invention; Figure 5 For the corresponding Figure 4 A structural diagram from another direction; Figure 6 This is a partial structural concealment diagram of Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the structure of the sphere cabin in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the coupling frame structure in Embodiment 1 of the present invention; Figure 9 For the corresponding Figure 8 A structural diagram from another direction; Figure 10 For the corresponding Figure 9 A structural diagram from another direction; Figure 11 For the corresponding Figure 10 A schematic diagram of the structure of section B; Figure 12 This is a schematic diagram of the coupling frame structure in Embodiment 2 of the present invention; Figure 13 For the corresponding Figure 12 A structural diagram from another direction; Figure 14 For the corresponding Figure 13 A schematic diagram of the structure from another direction.

[0025] Reference numerals: 100-Coupling frame, 110-Support structure, 111-First support, 1111-First interface, 112-Second support, 113-First connection position; 120-Auxiliary support plate structure, 121-First auxiliary support plate, 1211-First surface, 1212-Second surface, 1213-Adjustment hole group, 12131-First adjustment hole, 12132-Second adjustment hole, 122-First leveling component, 1221-First Adjusting plate, 1222-first connecting piece; 130-first mounting position, 131-first slot; 140-first transmission piece; 150-contour support structure, 151-first contour support piece, 1511-first contour support piece body, 1512-first gripping structure, 15121-first gripping tip, 152-second contour support piece, 1521-second contour support piece body, 1522-second gripping structure, 15221-second... Focus on the cutting edge; 200-Seafloor seismograph, 210-Detection module, 211-PCB board, 2111-Radio antenna, 212-Shear wave detection structure, 2121-Conductive housing, 2123-First connector, 2124-Second connector, 213-Water listener, 220-Housing, 221-First housing, 2211-Water inlet, 2212-First fold, 2213-Second limiting protrusion, 222-Second housing, 2221- First limiting protrusion, 2222-Second folded edge, 230-Wave plate, 231-Wave plate body, 232-Buffer, 233-First fastener, 240-Modible connector, 241-Hook, 2411-Hook through slot, 242-Rotation locking component, 250-Conduction bracket, 251-First support rod, 252-Second support rod, 253-Conduction locking component, 260-Sphere chamber, 261-Upper hemispherical chamber, 262-Lower hemispherical chamber. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0027] In the description of this application, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] In the description of this application, if words such as several, greater than, less than, exceeding, above, below, or within appear, "several" means one or more, "more than" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, and "above," "below," "within," etc. are understood to include the number itself.

[0029] In the description of this application, the use of terms such as "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0030] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0031] Example 1: like Figures 1-14 As shown in the figure, an embodiment of the present invention provides a submarine earthquake detection device, comprising: The system comprises a coupling frame 100 and a seabed seismograph 200. The coupling frame 100 has a downward-facing opening slot for embedding into the seabed strata. The seabed seismograph 200 is connected to the coupling frame 100 and includes a detection module 210, a housing 220, a wave plate 230, a movable connector 240, and a transmission support 250. The detection module 210 is located inside the housing 220 and abuts against the inner wall of the housing 220. One side of the transmission support 250 is connected to the housing 220, and the other side is connected to the coupling frame 100, separating the housing 220 from the coupling frame 100. The wave plate 230 is connected to the side of the housing 220 near the transmission support 250. One side of the movable connector 240 is connected to the wave plate 230, and the other side is connected to the coupling frame 100. The coupling frame 100, the wave plate 230, the movable connector 240, and the housing 220 constitute an elastic system for transmitting detection waves.

[0032] Specifically, the transmission support 250 and the housing 220 form the first transmission path for transmitting the detection wave, while the elastic system consisting of the coupling frame 100, the wave plate 230, the movable connector 240, and the housing 220 forms the second transmission path for transmitting the detection wave. Through the dual-path design, the vibration waves from the two paths are superimposed at the housing 220 and then act together on the detection module 210, effectively improving the sensitivity of the seabed seismograph 200 in detecting seismic shear waves (S-waves) or converted shear waves (PS-waves). At the same time, the transmission support 250 separates the housing 220 from the coupling frame 100, preventing direct rigid contact between the housing 220 and the coupling frame 100.

[0033] Specifically, the seabed seismograph in this embodiment of the invention is a self-contained seabed seismograph to reduce detection costs.

[0034] Specifically, the opening slot is a U-shaped slot. The coupling frame 100 can be embedded into the seabed strata through the two side walls of the U-shaped slot by means of the seabed seismograph 200 and its own gravity, thereby improving the coupling between the seabed seismic detection device and the seabed strata, and thus improving the sensitivity of the seabed seismograph in detecting seismic shear waves (S-waves) or converted shear waves (PS-waves).

[0035] Specifically, this application connects the seabed seismograph 200 to the coupling frame 100. By providing a downward-facing opening slot in the coupling frame 100, the seabed seismograph 200 can be directly embedded into the seabed strata, forming a stable mechanical fit between the device and the strata. This improves the elastic coupling effect between the seabed seismograph 200 and the seabed strata, and enhances the sensitivity of the seabed seismograph 200 in detecting seismic shear waves (S-waves) or converted shear waves (PS-waves). Simultaneously, the coupling frame 100, the wave plate 230, the movable connector 240, and the shell 2... Together, the two components form a complete elastic system for transmitting shear waves. When the seismic waves from the seabed are transmitted to the coupling frame 100 through the opening slot, the seismic waves are transmitted sequentially through the movable connector 240 and the wave plate 230 to the shell 220, and finally received by the detection module 210 installed inside the shell 220. This allows the vibration signals of the seismic shear waves (S-waves) and converted shear waves to be transmitted to the detection module 210 more completely and faithfully, improving the pickup sensitivity and signal-to-noise ratio of the shear wave signals and enhancing the reliability of the seabed seismograph 200 in detecting seismic waves.

[0036] In some embodiments, such as Figures 1-6 As shown, the wave plate 230 includes a wave plate body 231, multiple buffers 232 and multiple first fasteners 233. The multiple buffers 232 are located on the side of the wave plate body 231 away from the housing 220. The multiple first fasteners 233 pass through the multiple buffers 232 and the wave plate body 231 in sequence and are connected to the housing 220.

[0037] Specifically, the buffer 232 is preferably a compression spring, and the first fastener 233 is preferably a bolt. There are four buffers 232 and four first fasteners 233. The wave plate body 231 has four square through holes. The compression springs are respectively set on the through holes on the side of the wave plate body 231 away from the housing 220. The bolts pass through the compression springs and the corresponding through holes in sequence and are then connected to the housing 220 to fix the wave plate 230 to the housing 220. At the same time, by providing compression springs, when the residual vibration generated by the housing 220 is transmitted to the wave plate body 231, the damping buffer formed by the compression springs and the wave plate body 231 can absorb the residual vibration generated by the housing 220, thereby solving the tail vibration and low-frequency resonance caused by the rigid contact between the wave plate 230 and the housing 220, and improving the quality of seismic waves detected by the seabed seismograph 200.

[0038] In some embodiments, such as Figures 1-6 As shown, the shell 220 includes a first shell 221 and a second shell 222, which enclose a spherical cavity. The seabed seismograph 200 also includes a spherical chamber 260, and a detection module 210 is disposed inside the spherical chamber 260. The spherical chamber 260 is movably abutted against the inner wall of the spherical cavity so that the spherical chamber 260 is always abutted against the shell 220, ensuring that seismic waves are transmitted sequentially through the movable connector 240 and the wave plate 230 to the shell 220, and are finally received by the detection module 210 abutted against inside the shell 220, thereby improving the reliability of the seabed seismograph 200 in detecting seismic waves.

[0039] Specifically, the sphere 260 is a glass sphere to facilitate observation of the detection module 210 located inside the sphere 260.

[0040] In some embodiments, such as Figures 1-6 , Figure 7 As shown, the detection module 210 includes a PCB board 211 and a transverse wave detection structure 212. The transverse wave detection structure 212 is located inside the sphere 260, and the PCB board 211 is connected to the transverse wave detection structure 212.

[0041] Specifically, the spherical compartment 260 includes an upper hemispherical compartment 261 and a lower hemispherical compartment 262. The upper hemispherical compartment 261 and the lower hemispherical compartment 262 are connected by adhesive bonding, flange bolts or ring clamps, preferably flange bolts, to reduce mechanical tail vibration and facilitate the installation of the detection module 210.

[0042] Specifically, the shear wave detection structure 212 is connected to the inner wall of the lower hemispherical cabin 262. The lower hemispherical cabin 262 is positioned close to the coupling frame 100 when the seabed seismograph 200 is embedded in the seabed strata to minimize the vibration transmission distance between the shear wave detection structure 212 and the coupling frame 100. This shortens the path length of the seismic wave from the seabed strata through the coupling frame 100 to the shear wave detection structure 212, reduces energy attenuation and phase delay during signal transmission, and improves the reliability of the detection.

[0043] In some embodiments, such as Figures 1-6 , Figure 7 As shown, the transverse wave detection structure 212 includes a conductive housing 2121, a seismometer, a PCB board 211 connected to the outside of the conductive housing 2121, the seismometer connected inside the conductive housing 2121 and electrically connected to the PCB board 211, and the conductive housing 2121 connected inside the sphere 260.

[0044] Specifically, the seismometer converts the vibration of the housing 220 into an electrical signal that can be analyzed, and then transmits it to the PCB board 211 for storage.

[0045] Specifically, the transverse wave detection structure 212 also includes a lithium battery, a first connector 2123, and a second connector 2124. The PCB board 211 is electrically connected to the lithium battery, and the first connector 2123 and the second connector 2124 are electrically connected to the PCB board 211, respectively. The first connector 2123 and the second connector 2124 are 8-core connectors and 6-core connectors, respectively. Both the 8-core connector and the 6-core connector are watertight through-wall connectors to ensure stable circuit connection.

[0046] Specifically, the PCB board 211 is connected to the conductive housing 2121 by adhesive bonding to prevent the PCB board 211 from detaching from the conductive housing 2121 and causing damage during the movement of the sphere 260, thereby improving the stability of the seabed seismograph 200.

[0047] Specifically, the PCB board 211 is also equipped with a radio antenna 2111 and a data storage unit. The radio antenna 2111 is housed inside the sphere 260 and is only activated after the seabed seismograph 200 floats to the surface. It is mainly used to establish wireless / satellite communication with the surface terminal, and to transmit back the equipment's positioning coordinates, remaining power, the original waveform of the entire set of shear wave observations, and equipment operating condition and fault information. On the other hand, it receives debugging instructions such as sampling frequency and filtering threshold sent from the surface. During the underwater operation, the radio antenna 2111 is in a closed and static state to avoid electromagnetic clutter interference with the acquisition of weak shear wave signals.

[0048] The data storage unit is responsible for storing the observation data output by the acquisition and control unit for a long time locally. It partitions and stores the three-component shear wave data, water pressure noise data, equipment operating parameters, and release action logs, and adds a high-precision unified timestamp. It completely preserves the original waveform including tail vibration noise, which is convenient for indoor algorithm noise reduction to restore the real formation signal.

[0049] In some embodiments, such as Figures 1-4 The detection module 210 also includes a water listener 213, which is located on the side of the first housing 221 away from the second housing 222.

[0050] Specifically, the hydrophone 213 is electrically connected to the PCB board 211, and feeds back the low-frequency noise generated by the water pressure longitudinal waves and ocean currents and water disturbances propagating in the seawater to the PCB board 211. On the one hand, it can record the water interference waveform separately, which is convenient for distinguishing the interference tail vibration caused by seawater flow and the real shear transverse waves of the seabed strata in the later stage. The algorithm can be used to remove the low-frequency noise of the water body and improve the signal-to-noise ratio of transverse wave detection. On the other hand, it can monitor the vibration noise caused by the impact of seawater on the sphere 260, and help to determine the cause of the tailing induced by the resonance of the shell 220. At the same time, it can also cooperate with the acoustic release mechanism to receive the acoustic command for surface recovery, and provide a water acoustic signal transmission channel for the underwater controllable surfacing and recovery of the seabed seismograph 200.

[0051] In some embodiments, such as Figures 1-5 As shown, the first housing 221 is provided with a plurality of water inlets 2211 recessed into the first housing 221. The plurality of water inlets 2211 are arranged at intervals along the circumference of the first housing 221 and are respectively connected to the spherical cavity.

[0052] Specifically, there are four inlets 2211 to ensure that the hydrostatic pressure inside the spherical cavity and the external seawater remains consistent. This ensures that when the spherical chamber 260 vibrates, the liquid inside the spherical cavity can freely enter and exit through the inlets 2211 without generating additional reverse pressure on the spherical chamber 260. As a result, the spherical chamber 260 can vibrate with the seismic waves in a near-free-floating or low-constraint state within the spherical cavity, thereby eliminating the obstruction of the spherical chamber 260's vibration by the liquid (or gas). At the same time, the inlets 2211 ensure that when the shell 220 is subjected to a severe impact at the moment the seabed seismometer 200 is deployed to the seabed strata, the inlets 2211 act as pressure relief channels, instantly releasing the impact pressure to protect the internal spherical chamber 260 and the shear wave detection structure 212.

[0053] In some embodiments, such as Figures 1-5 As shown, the second housing 222 is provided with a plurality of first limiting protrusions 2221 extending toward the center line of the second housing 222. The plurality of first limiting protrusions 2221 are arranged at intervals along the circumference of the second housing 222, and the spherical compartment 260 abuts against the plurality of first limiting protrusions 2221.

[0054] Specifically, the first limiting protrusion 2221 and the second shell 222 are integrally formed, and the protrusion thickness of the first limiting protrusion 2221 is the same as the thickness of the second shell 222. Multiple first limiting protrusions 2221 are provided with contact surfaces on the side facing the sphere 260. The contact surfaces form a multi-point abutment fit with the outer surface of the sphere 260, so as to directly transmit the seabed stratum vibration received by the second shell 222 to the sphere 260 through the solid contact path. This allows the vibration signal acquired by the detection module 210 to avoid the seawater medium transmission path, thereby reducing the energy attenuation and phase distortion of the vibration signal when it is transmitted at the solid-liquid-solid interface, and thus improving the sensitivity of the detection module 210 to weak seismic wave signals.

[0055] Specifically, the number of the first limiting protrusions 2221 is 8, which ensures that the structure of the second shell 222 is simplified and the ease of production is improved without affecting the transmission of seismic waves.

[0056] Specifically, a second limiting protrusion 2213 is provided between two adjacent water inlets 2211 of the first shell 221 to directly transmit the seabed stratum vibration received by the first shell 221 to the sphere 260 through the solid contact path, so that the vibration signal obtained by the detection module 210 avoids the seawater medium transmission path, thereby reducing the energy attenuation and phase distortion of the vibration signal when it is transmitted at the solid-liquid-solid interface, thereby improving the sensitivity of the detection module 210 to weak seismic wave signals.

[0057] In some embodiments, such as Figures 1-6 As shown, the movable connector 240 is provided with a hook 241 for connecting to the sinker frame 100 and a rotating locking member 242 for locking the hook 241 on the side facing the sinker frame 100. The rotating locking member 242 is rotatably connected to the opening of the hook 241.

[0058] Specifically, a hook through groove 2411 is provided at the opening of the hook 241 in the bending direction of the hook 241. The hook through groove 2411 passes through both sides of the hook 241. A rotating shaft is provided on the side of the hook through groove 2411 near the wave plate 230, so that the rotating locking member 242 can be rotatably connected to the rotating shaft. Then, by rotating the rotating locking member 242 around the central axis of the rotating shaft, the movable connecting member 240 can be locked on the sinker frame 100.

[0059] Specifically, a return spring is also provided in the hook through groove 2411; one end of the return spring is connected to the bottom of the hook through groove 2411, and the other end is connected to the rotating locking member 242, so that the rotating locking member 242 can automatically return and lock onto the sinker frame 100 after it is opened, so that the vibration can be stably transmitted from the sinker frame 100 to the movable connector 240, thereby improving the reliability and convenience of the connection of the movable connector 240.

[0060] In some embodiments, such as Figures 1-6 As shown, the conduction support 250 includes multiple first support rods 251, multiple second support rods 252, and multiple conduction locking elements 253. The connection between the first housing 221 and the second housing 222 is provided with a first folded edge 2212 and a second folded edge 2222, respectively. The multiple first support rods 251 surround and pass through the first folded edge 2212 and the second folded edge 2222. The multiple conduction locking elements 253 are connected to the side of the multiple first support rods 251 near the first folded edge 2212. The multiple second support rods 252 are respectively connected to two adjacent first support rods 251.

[0061] Specifically, there are four first support rods 251 and four second support rods 252. The four first support rods 251 are evenly distributed at equal angles of 90° along the circumference of the shell 220. The four second support rods 252 are respectively connected between two adjacent first support rods 251, forming a rectangular cage frame structure. Along the plane of the wave plate 230, this application uses a rectangular cage frame structure to make the mechanical properties of the transmission support 250 rotationally symmetric in the horizontal plane. When a horizontal seismic wave acts on the transmission support 250 at any angle, the mechanical impedance of the transmission support 250 to the seismic wave remains constant, so as to eliminate the directional measurement error caused by the anisotropy of the structure of the transmission support 250 itself, and ensure that the signal amplitude output by the shear wave detection structure 212 only reflects the true intensity of the seismic wave and is independent of the horizontal incident direction of the seismic wave, thereby improving the reliability of the seabed seismograph 200 in detecting seismic waves.

[0062] Specifically, there are four conductive locking components 253. The first folded edge 2212 and the second folded edge 2222 are provided with corresponding housing connection holes. The first support rod 251 is provided with a threaded connection end. The threaded connection end of the first support rod 251 is passed through the housing connection hole and locked to the threaded connection end by the conductive locking component 253. This not only fixes the first housing 221 and the second housing 222, but also realizes the fixed connection of the conductive bracket 250 to the housing 220, improving the convenience of connecting the seabed seismic detection device.

[0063] In some embodiments, such as Figures 8-11 As shown, the coupling frame 100 includes a support structure 110 and an auxiliary support plate structure 120. The support structure 110 includes a first support 111 and at least two second supports 112. Along the width direction of the first support 111, at least two second supports 112 are arranged opposite to each other on both sides of the first support 111, forming at least four first mounting positions 130. The auxiliary support plate structure 120 includes at least four first auxiliary support plates 121. The at least four first auxiliary support plates 121 are respectively connected to the at least four first mounting positions 130 along the circumference of the support structure 110, forming a closed contact surface.

[0064] Specifically, the support structure 110 of this application includes a first support 111 and at least two second supports 112. The at least two second supports 112 are arranged opposite to each other on both sides along the width direction of the first support 111, forming at least four first mounting positions 130. First auxiliary support plates 121 are then connected to each of the at least four first mounting positions 130, so that each first auxiliary support plate 121 is distributed circumferentially along the support structure 110 and forms a closed contact surface, thereby increasing the effective contact area between the sinking frame 100 and the seabed sediment, and reducing the load on the sinking frame 100 under the same load. The unit area pressure on the soft mud bottom effectively prevents the sinking frame 100 from sinking excessively into the mud bottom, avoiding the inability to recover the seabed seismograph 200 due to deep sinking. This improves the success rate of recovering the seabed seismograph 200 in areas with soft seabed sediment and ensures the integrity and reliability of seismic data acquisition. At the same time, the first auxiliary support plates 121 are distributed circumferentially along the support structure 110, so that the sinking frame 100 is subjected to uniform force and stable support when in contact with the seabed, and is not prone to tilting or instability. This helps to enhance the coupling effect between the seabed seismograph 200 and the seabed and improve the stability of data acquisition.

[0065] Specifically, the first support 111 and the second support 112 are made of U-shaped plates, eliminating the need for separate processing of U-shaped grooves and improving production convenience. At the same time, the opening of the U-shaped plate faces downward. When an external load is applied to the U-shaped plate, it first acts on the arc section of the U-shaped plate and then is transmitted downward to the seabed through the two side walls of the U-shaped plate. This effectively utilizes the bending stiffness of the U-shaped section, reduces the elastic deformation of the support structure 110 under stress, and thus improves the stability of the sinking frame 100 during long-term deployment.

[0066] In some embodiments, such as Figures 8-9 As shown, the first auxiliary support plate 121 has a first surface 1211 and a second surface 1212 opposite to each other. Each first auxiliary support plate 121 has at least one first leveling component 122, which passes through the first surface 1211 and the second surface 1212 to perform leveling.

[0067] Specifically, the first surface 1211 faces the seabed, and the second surface 1212 faces the seabed seismograph 200; one end of the first leveling component 122 extends from the first surface 1211 to contact the seabed, and the other end extends from the second surface 1212 to perform active leveling by relative movement of the first leveling component 122.

[0068] Specifically, the number of first leveling components 122 is preferably three. Each first auxiliary support plate 121 is provided with three first leveling components 122. The three first leveling components 122 are arranged in a triangle on the second surface 1212, and the apex of the triangle faces the center of the coupling frame 100. This allows the coupling frame 100 to effectively convert external forces into tensile and compressive loads on each leveling component, regardless of the direction of the ocean current impact or seabed seismic disturbance, thus maintaining the stability of the first auxiliary support plate 121 and preventing torsional deformation, thereby improving the stability of the coupling frame 100 during use. At the same time, the apex of the triangle faces the center of the coupling frame 100, causing the force flow transmitted to the outer edge to diffuse radially, reducing the detour and concentration of the force flow within the first auxiliary support plate 121, which helps to reduce the local stress peak of the first auxiliary support plate 121 and improve the fatigue durability of the overall structure.

[0069] In some embodiments, such as Figures 8-9 As shown, the coupling frame 100 also includes a first transmission component 140 for connecting the seabed seismograph 200. The first transmission component 140 is disposed on the side of the support structure 110 near the second surface 1212. One end of the first transmission component 140 is detachably connected to the support structure 110, and the other end is connected to the movable connector 240.

[0070] Specifically, the first transmission component 140 is provided with a threaded connection end, and is then connected to the support structure 110 by a threaded connection to improve the ease of assembly; at the same time, the first transmission component 140 is fixed at one end to the support structure 110 and locked at the other end to the movable connector 240, which can effectively transmit the vibration on the sinking frame 100 to the seabed seismograph 200, effectively improving the detection sensitivity of the seabed seismograph 200.

[0071] In some embodiments, such as Figures 8-9 As shown, the support structure 110 is also provided with a first connection position 113 on the side near the second surface 1212, and the conduction support 250 is connected to the first connection position 113.

[0072] Specifically, there are four first connection positions 113. The four first connection positions 113 are equidistant and at equal angles along the circumference of the support structure 110 to ensure the force balance after the four first support rods 251 are connected. The first connection positions 113 are ring structures, and the ring structures are fixed to the support structure 110 by welding. This allows the seabed seismograph 200 to be quickly positioned and installed with the coupling frame 100 through the ring structure, effectively improving the assembly efficiency. At the same time, the ring structure can limit the deflection of the seabed seismograph 200, effectively improving the stability of the connection.

[0073] Specifically, the first support rod 251 is connected to the bottom of the first connection position 113 by welding to improve the stability of the connection of the seabed seismograph 200.

[0074] Specifically, by penetrating the bottom of the first connecting position 113, the first support rod 251 can be detachably connected to the first connecting position 113, thereby improving the flexibility and convenience of the connection.

[0075] In some embodiments, such as Figures 8-9 As shown, the first leveling component 122 includes a first leveling plate 1221 and a first connector 1222. The first connector 1222 is connected to the first auxiliary support plate 121, and the first leveling plate 1221 is connected to the first connector 1222 and abuts against the first auxiliary support plate 121.

[0076] Specifically, the first auxiliary support plate 121 is provided with a threaded hole that passes through the first surface 1211 and the second surface 1212. The first connector 1222 is movably connected in the threaded hole, so that silt, fine sand, water and the like can enter the second surface 1212 from the first surface 1211 through the threaded hole and push the first adjusting plate 1221 open for leveling. Then, the reaction force of the silt, fine sand, water and the like acts on the first adjusting plate 1221 away from the second surface 1212 to prevent the sinking frame 100 from sinking too much, thereby automatically adjusting the balance of the sinking frame 100 and improving the support stability of the sinking frame 100.

[0077] In some embodiments, such as Figures 8-11 As shown, an adjustment hole group 1213 is provided at the contact point between the first auxiliary support plate 121 and the first adjustment plate 1221, and the first adjustment plate 1221 abuts against the adjustment hole group 1213.

[0078] Specifically, the adjusting hole assembly 1213 includes two first adjusting holes 12131 and one second adjusting hole 12132. The two first adjusting holes 12131 are arranged opposite each other on both sides of the second adjusting hole 12132. The projection of the first adjusting plate 1221 onto the second surface 1212 completely covers the two first adjusting holes 12131 and the second adjusting hole 12132, so that the first adjusting plate 1221 can completely abut against the two first adjusting holes 12131 and the second adjusting hole 12132 due to gravity. At the same time, silt, fine sand, water, etc. can quickly enter the second surface 1212 from the first surface 1211 through the first adjusting holes 12131 and the second adjusting hole 12132 for leveling. When equilibrium is reached, the silt... The reaction forces of mud, fine sand, water, etc., act on the first adjusting plate 1221 that has been pushed open to maintain the balance of the settling frame 100. At the same time, the setting of two first adjusting holes 12131 and one second adjusting hole 12132 can prevent the first leveling component 122 from being unable to adjust due to the blockage of the threaded hole during the leveling process, increase the throughput of silt, fine sand, and water, and improve the speed of automatic balance adjustment of the settling frame 100. In addition, by setting three sets of first leveling components 122, the throughput speed of silt, fine sand, water, etc. can be increased by the spaced first adjusting plates 1221, and the action surface of the reaction forces of silt, fine sand, water, etc. is also increased, effectively maintaining the stability of the settling frame 100 after automatic leveling.

[0079] Specifically, the first mounting position 130 is provided with a first slot 131, and the first auxiliary support plate 121 is engaged with the first slot 131. The first slot 131 is provided along the inner wall of the first mounting position 130 on the first bracket 111 and the second bracket 112 to ensure that the first auxiliary support plate 121 can be stably connected to the first bracket 111 and the second bracket 112, thereby improving the stability of the coupling frame 100.

[0080] Specifically, after the first auxiliary support plate 121 is snapped into the first slot 131, the first auxiliary support plate 121 can be fixedly connected to the first bracket 111 and the second bracket 112 by welding to improve the stability of the connection.

[0081] In some other embodiments, an annular groove can be provided on the outer edge of the connecting end of the first auxiliary support plate 121. By inserting the elastic sealing ring into the annular groove and then inserting the first auxiliary support plate 121 into the first slot 131, a detachable connection can be achieved, while enhancing the stability of the connection.

[0082] Specifically, along the width direction of the first bracket 111, the first bracket 111 is provided with at least two first interfaces 1111, and at least two second brackets 112 are respectively connected to the at least two first interfaces 1111; in this embodiment of the invention, the at least two second brackets 112 are respectively connected to the at least two first interfaces 1111 by welding, so as to improve the stability of the connection and the convenience of welding.

[0083] Specifically, there are two second brackets 112 and two first interfaces 1111. The two second brackets 112 are respectively connected to the two first interfaces 1111 and form four first mounting positions 130.

[0084] Specifically, the two first interfaces 1111 are respectively located in the middle of the first bracket 111 along the length direction; in this embodiment of the invention, the number of the first auxiliary support plates 121 is four, so as to divide the four first mounting positions 130 into equal areas, and then ensure the force balance of the coupling frame 100 through the equal area structural design, thereby improving the stability of the coupling frame 100 during use.

[0085] The present invention also provides a detection method, which uses the above-mentioned submarine earthquake detection device for detection, and includes the following steps: S100, Deploy the unmanned probe to the target sea area for exploration, and then select the corresponding coupling frame 100.

[0086] Specifically, after the unmanned probe is deployed to the target sea area for exploration, the corresponding coupling frame 100 is selected based on the information on seabed topography slope, sediment type and stratum hardness obtained by the drone, thereby improving the flexibility of the use of the seabed seismic detection device.

[0087] S200. Connect the seabed seismic detection device to the control box, configure parameters through the control box, and conduct tests.

[0088] Specifically, the control box is a wired direct-connect control box and is equipped with a display screen. The control box is electrically connected to the PCB board 211 via the first connector 2123 or the second connector 2124. Then, the sampling rate of the shear wave detection structure 212 and the hydrophone 213 is configured through the control box. The housing 220 is tapped lightly. When it is confirmed that the sampling rate of the simulated seismic wave detected by the shear wave detection structure 212 and the noise generated by the housing 220 by the hydrophone 213 are consistent, the test is qualified. Otherwise, the relevant structures are checked until the sampling rates of the shear wave detection structure 212 and the hydrophone 213 are consistent to ensure that the vibration information of the seabed particles and the sound pressure information of the water body are obtained at the same time, so as to ensure the accuracy of the subsequent wave field joint calculation.

[0089] S300: After testing is completed, the seabed seismic detection device will be transported to the target sea area for deployment.

[0090] S400. After the seabed seismic detection device is lowered into the seabed strata and embedded, it will automatically enter the working mode to collect information.

[0091] Specifically, after the seabed seismic detection device is sunk to the seabed strata and embedded, it automatically enters the working mode according to the pre-set program to collect seabed seismic waves and seawater noise.

[0092] S500 After the seabed seismic detection device enters the working mode, the coupling frame 100 transmits the seabed seismic waves to the wave plate 230. The wave plate 230 transmits the seabed seismic waves to the shell 220 through the movable connector 240. The detection module 210 collects and stores the seabed seismic waves.

[0093] Specifically, after the seabed seismic detection device enters the working mode, the seabed seismic waves are transmitted to the wave plate 230 through the coupling frame 100. The wave plate 230 vibrates and transmits the seabed seismic waves to the shell 220 through the movable connector 240. The shell 220 transmits the seabed seismic waves to the sphere 260, so that the shear wave detection structure 212 located in the sphere 260 receives the seabed seismic waves and performs detection and confirmation. Then, the seismometer of the shear wave detection structure 212 converts the seabed seismic waves into electrical signals and transmits them to the PCB board 211 for storage. At the same time, the hydrophone 213 detects and picks up the water pressure longitudinal waves propagating in the seawater and the low-frequency noise generated by ocean currents and water disturbances, and then transmits them to the PCB board 211 for storage, so as to complete the acquisition of seabed mass vibration information and water sound pressure information at the same time.

[0094] S600: After the seabed seismic detection device has been lowered for the preset time, retrieve the seabed seismic detection device and connect it to the control box to export the detection data to complete the detection.

[0095] Specifically, once the seabed seismic detection device has been lowered to the preset time, the coupling frame 100 is detachably connected to the seabed seismograph 200 via the movable connector 240 and the transmission support 250. When the seabed seismograph 200 is recovered, the coupling frame 100 will also be recovered together, effectively reducing the waste of the coupling frame 100 and lowering the cost of use.

[0096] Specifically, after the seabed seismograph 200 is recovered, the control box is electrically connected to the PCB board 211 via the first connector 2123 or the second connector 2124, and then the collected data is exported to the control box for analysis. Next, the seabed seismic detection device is cleaned and placed in the warehouse to complete the detection and collection of seabed seismic waves and seawater noise in the seabed strata.

[0097] Example 2: like Figures 12-14As shown, the difference between Embodiment 2 and Embodiment 1 is that, firstly, the first support 111 in Embodiment 2 does not have two first interfaces 1111, and the two second supports 112 are directly connected to both sides of the first support 111; secondly, Embodiment 2 does not have an auxiliary support plate structure 120, but instead has a contour support structure 150. The contour support structure 150 includes at least one first contour support member 151 and at least two second contour support members 152. At least one first contour support member 151 is disposed in the U-shaped groove of the first support 111, and at least two second contour support members 152 are disposed in the U-shaped grooves of the two second supports 112 respectively, so that the first contour support member 151 and the second contour support member 152 contact the seabed, so that the sinking frame 100 is firmly fixed to the bottom of the seabed, preventing the seabed seismograph 200 from tipping over due to the uneven terrain when used on the seabed with a large amount of gravel or coarse conglomerate, thus affecting the detection effect or making it unrecoverable.

[0098] Specifically, the first contour support 151 includes a first contour support body 1511 and two first gripping structures 1512. The two first gripping structures 1512 are connected to the two sides of the first contour support body 1511 at a certain angle to increase the adhesion and pressing force on the seabed bottom and the gripping force parallel to the length direction of the first contour support body 1511, so as to prevent the seabed seismograph 200 from tipping over and improve the stability of placement.

[0099] Specifically, the second contour support 152 includes a second contour support body 1521 and a second gripping structure 1522. The second gripping structure 1522 is set at a certain angle at the end of the second contour support body 1521 away from the first support 111, so that the two second contour support members 152 can cooperate to increase the adhesion and pressing force on the seabed bottom and the gripping force parallel to the length direction of the second contour support body 1521, so as to prevent the seabed seismograph 200 from tipping over and improve the stability of placement.

[0100] Specifically, the first gripping structure 1512 and the second gripping structure 1522 adopt a sheep's hoof-shaped design. The first gripping structure 1512 is provided with two first gripping tips 15121 and the second gripping structure 1522 is provided with two second gripping tips 15221, which can make the sinking frame 100 partially embedded in the seabed, thereby improving the stability of the seabed seismograph 200. At the same time, through the outward extension of the first gripping tips 15121 and the second gripping tips 15221, the first gripping tip 15121 forms a certain angle with the first contour support body 1511, and the second gripping tip 15221 forms a certain angle with the second contour support body 1521, which can make it easier to retrieve the seabed seismograph 200 and the sinking frame 100 from the seabed.

[0101] Specifically, the number of first contouring support members 151 is preferably two, and the number of second contouring support members 152 is preferably four, so as to ensure that the structure of the sinking frame 100 is simplified while enhancing the grip of the sinking frame 100, thereby improving production convenience.

[0102] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A submarine earthquake detection device, characterized in that, include: A sinking frame (100) is provided with a downward-facing opening groove for embedding into the seabed strata; A seabed seismograph (200) is connected to a coupling frame (100). The seabed seismograph (200) includes a detection module (210), a housing (220), a wave plate (230), a movable connector (240), and a transmission support (250). The detection module (210) is located inside the housing (220) and abuts against the inner wall of the housing (220). One side of the transmission support (250) is connected to the housing (220), and the other side is connected to the coupling frame (100), separating the housing (220) from the coupling frame (100). The wave plate (230) is connected to the side of the housing (220) near the transmission support (250). One side of the movable connector (240) is connected to the wave plate (230), and the other side is connected to the coupling frame (100). The wave plate (230) includes a wave plate body (231), a plurality of buffers (232) and a plurality of first fasteners (233). The plurality of buffers (232) are disposed on the side of the wave plate body (231) away from the housing (220). The plurality of first fasteners (233) pass through the plurality of buffers (232) and the wave plate body (231) in sequence and are connected to the housing (220). The coupling frame (100), the wave plate (230), the movable connector (240), and the housing (220) constitute an elastic system for transmitting the detection wave.

2. The submarine seismic detection device according to claim 1, characterized in that, The shell (220) includes a first shell (221) and a second shell (222), which together form a spherical cavity; the seabed seismograph (200) also includes a spherical cabin (260), and the detection module (210) is located inside the spherical cabin (260), which is movably abutted against the spherical cavity.

3. The submarine seismic detection device according to claim 2, characterized in that, The detection module (210) includes a PCB board (211) and a transverse wave detection structure (212). The transverse wave detection structure (212) is located inside the sphere (260), and the PCB board (211) is connected to the transverse wave detection structure (212).

4. The submarine seismic detection device according to claim 3, characterized in that, The transverse wave detection structure (212) includes a conductive housing (2121) and a seismometer. The PCB board (211) is connected to the outside of the conductive housing (2121). The seismometer is connected inside the conductive housing (2121) and electrically connected to the PCB board (211). The conductive housing (2121) is connected inside the sphere (260).

5. The submarine seismic detection device according to claim 3, characterized in that, The detection module (210) also includes a water listener (213), which is located on the side of the first housing (221) away from the second housing (222).

6. The submarine seismic detection device according to claim 2, characterized in that, The first housing (221) is provided with a plurality of water inlets (2211) recessed into the first housing (221), and the plurality of water inlets (2211) are arranged at intervals along the circumference of the first housing (221) and are respectively connected to the spherical cavity.

7. The submarine seismic detection device according to claim 2, characterized in that, The second housing (222) is provided with a plurality of first limiting protrusions (2221) extending toward the center line of the second housing (222). The plurality of first limiting protrusions (2221) are arranged at intervals along the circumference of the second housing (222), and the sphere (260) abuts against the plurality of first limiting protrusions (2221).

8. The submarine seismic detection device according to claim 1, characterized in that, The movable connector (240) is provided with a hook (241) for connecting the sinker frame (100) and a rotating locking member (242) for locking the hook (241) on the side facing the sinker frame (100). The rotating locking member (242) is rotatably connected to the opening of the hook (241).

9. A submarine seismic detection device according to claim 2, characterized in that, The transmission support (250) includes multiple first support rods (251), multiple second support rods (252), and multiple transmission locking elements (253). The connection between the first housing (221) and the second housing (222) is provided with a first folded edge (2212) and a second folded edge (2222), respectively. The multiple first support rods (251) surround and pass through the first folded edge (2212) and the second folded edge (2222). The multiple transmission locking elements (253) are connected to the side of the multiple first support rods (251) near the first folded edge (2212). The multiple second support rods (252) are respectively connected to two adjacent first support rods (251).

10. A submarine seismic detection device according to claim 9, characterized in that, The coupling frame (100) includes a support structure (110) and an auxiliary support plate structure (120). The support structure (110) includes a first support (111) and at least two second supports (112). Along the width direction of the first support (111), at least two second supports (112) are arranged opposite to each other on both sides of the first support (111) and form at least four first mounting positions (130). The auxiliary support plate structure (120) includes at least four first auxiliary support plates (121). At least four first auxiliary support plates (121) are respectively connected to at least four first mounting positions (130) along the circumference of the support structure (110) and form a closed contact surface.

11. A submarine seismic detection device according to claim 10, characterized in that, The first auxiliary support plate (121) has a first surface (1211) and a second surface (1212) opposite to each other. Each first auxiliary support plate (121) has at least one first leveling component (122), which passes through the first surface (1211) and the second surface (1212) to perform leveling.

12. A submarine seismic detection device according to claim 11, characterized in that, The coupling frame also includes a first transmission component (140) for connecting the seabed seismograph (200). The first transmission component (140) is disposed on the side of the support structure (110) near the second surface (1212). One end of the first transmission component (140) is detachably connected to the support structure (110), and the other end is connected to the movable connector (240).

13. A submarine seismic detection device according to claim 11, characterized in that, The support structure (110) is further provided with a first connection position (113) on the side near the second surface (1212), and the conductive support (250) is connected to the first connection position (113).

14. The submarine seismic detection device according to claim 11, characterized in that, The first leveling component (122) includes a first leveling plate (1221) and a first connector (1222). The first connector (1222) is connected to the first auxiliary support plate (121), and the first leveling plate (1221) is connected to the first connector (1222) and abuts against the first auxiliary support plate (121).

15. A submarine seismic detection device according to claim 14, characterized in that, The first auxiliary support plate (121) and the first adjusting plate (1221) are provided with an adjusting hole group (1213) at the contact point, and the first adjusting plate (1221) abuts against the adjusting hole group (1213).

16. A detection method, comprising using a submarine seismic detection device as described in any one of claims 1-15, characterized in that, Includes the following steps: The unmanned probe is lowered to the target sea area for exploration, and then the corresponding coupling frame (100) is selected. Connect the submarine earthquake detection device to the control box, configure parameters and perform tests through the control box; After the testing is completed, the submarine earthquake detection device will be transported to the target sea area for deployment; After the seabed seismic detection device sinks to the seabed strata and embeds itself, the seabed seismic detection device automatically enters the working mode to collect information; After the submarine earthquake detection device enters the working mode, the coupling frame (100) transmits the submarine seismic waves to the wave plate (230), the wave plate (230) transmits the submarine seismic waves to the shell (220) through the movable connector (240), and the detection module (210) collects and stores the submarine seismic waves. After the seabed seismic detection device has been lowered for a preset time, it is retrieved and connected to the control box to export the detection data, thus completing the detection.

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