Integrated environment-friendly bottom seismograph

Abstract

The application discloses an integrated environment-friendly seabed seismograph, which comprises a first base body, a through hole is arranged in the middle of the first base body, and a seismic detector is arranged in the through hole; a second base body is connected below the first base body; a hole body is arranged through the middle of the second base body; the seismic detector can pass through the hole body; the first base body and the second base body are both conical table structures; the device can reduce the difficulty of deployment and recovery, improve the accuracy of the deployment position, and minimize the underwater sound noise and impact of the equipment during launching.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seismic monitoring, in particular to an integrated environmentally-friendly ocean bottom seismometer. BACKGROUND

[0002] Traditional ocean bottom seismometers for seismic observation include mooring type, self-floating type, and cable type. The mainstream is a split type ocean bottom seismometer, that is, the ball is separated from the weight anchor after triggering. The split type ocean bottom seismometer (OBS) is a specially designed seismic observation system, which is characterized in that the geophone (or sensor) and the main instrument (such as the recorder, power supply, etc.) are physically separated. After the OBS reaches the seabed and stabilizes, the geophone will be released and automatically fall to the seabed surface relying on its own gravity, thereby increasing the coupling degree with the seabed and improving the signal-to-noise ratio of the seismic signal. However, the split type ocean bottom seismometer needs to be accurately deployed to the seabed to ensure its close contact with the seabed, thereby effectively recording the seismic wave. However, this process is often affected by the marine environment, such as ocean currents, tides, seabed topography, etc., increasing the difficulty and uncertainty of deployment. After the work is completed, the split type ocean bottom seismometer needs to be recovered from the seabed to the sea surface. Due to the complexity and unpredictability of the marine environment, the recovery process may face many challenges, such as device position deviation, being stuck by seabed obstacles, etc., resulting in increased recovery difficulty.

[0003] Therefore, the prior art provides a variety of solutions, for example, the prior art KR1020240095936A discloses an ocean bottom seismometer (OBS); a hole is formed in the corresponding lower surface of the ocean bottom receiver, a plurality of weights are arranged at a set interval along the edge, and a seat plate is installed to seat the lower end of the ocean bottom receiver in the hole. And a collision prevention component, which is bowl-shaped, covers and surrounds the ocean bottom receiver seated on the seat plate. In this way, the problem of the split type seismometer being affected by the marine environment can be solved, but the prior art still has room for improvement in terms of how to improve the deployment and recovery effect. SUMMARY

[0004] The purpose of the present application is to provide an integrated environmentally-friendly ocean bottom seismometer, which can reduce the difficulty of deployment and recovery, improve the accuracy of the deployment position, and minimize the underwater noise and impact of the equipment during deployment.

[0005] To solve the above technical problems, the present application specifically provides the following technical scheme: an integrated environmentally-friendly ocean bottom seismometer, comprising a first base body, a through hole is provided in the middle of the first base body and is provided with a seismic detector, a second base body is connected below the first base body, a hole body is provided through the middle of the second base body, the seismic detector can pass through the hole body, and the first base body and the second base body are both conical frustum structures.

[0006] The first base body and the second base body are integrally arranged to form a protection for the seismometer, and the first base body and the second base body are used to correct the vertical state of the seismometer, and after the second base body at the bottom contacts the sea bottom, the contact between the seismometer and the sea bottom is ensured, so that the underwater sound noise is reduced. Specifically, the first base body and the second base body are designed as a conical table structure, so that in the process of moving downward into the sea water, the water body first contacts the second base body and the bottom surface of the first base body, and then contacts the top surface of the conical table with a smaller diameter. In this way, the water resistance increases when the device moves downward, so as to slow down the impact force when the device falls to the bottom of the water and reduce the deviation of the device deployment position. In addition, the water flow along the conical table surface of the first base body and the second base body can relatively centralize the water flow passing through the device to weaken the deviation distance of the device in the descending process, so as to reduce the difficulty of deployment and recovery.

[0007] According to an embodiment of the present application, the first base body and the second base body are both arranged as a structure with a smaller diameter at the upper part than at the lower part. By limiting the diameters of the upper and lower ends of the first base body and the second base body, the center of gravity of the first base body and the second base body is ensured to be below, so that after the device is put into the sea, it can be displaced downward towards the set coordinate range to reduce the deployment accuracy deviation.

[0008] According to an embodiment of the present application, the first base body is connected with a float body through a rope body, and the float body is provided with a slot relative to one side surface of the first base body. The first base body is provided with a plug rod motor matched with the slot. The plug rod motor and the slot are connected to control the fixing or separation of the float body and the first base body. The float body is provided as a release system of the device. When the device needs to be recovered, the plug rod motor is controlled to separate the float body from the first base body, without the remaining equipment. In this way, the float body can quickly float up and has better stability effect on the sea surface, which is more convenient to find. After the float body is found, the first base body and the second base body can be quickly lifted and recovered by pulling the rope body. The device can be repeatedly used by using the scheme of the present application, for example, after the battery replacement of the device is completed, the device can be used again.

[0009] According to an embodiment of the present application, the second base has a first cavity with a concave structure on the bottom surface, the second base is hollow inside and filled with a flowable filling body, the first through hole is arranged on the outer wall of the second base and the cavity wall, and the second through hole is provided with an electromagnetic valve. The first cavity arranged on the bottom surface of the second base can reduce the contact between the middle part of the bottom surface of the second base and the seabed, solve the problem that the seabed surface is flat and the second base cannot be in good contact with the seabed surface, and provide adjustment space for the angle between the bottom of the seismic detector and the seabed, thereby improving the fitting effect of the seismic detector and the seabed, enhancing the received signal, and improving the signal-to-noise ratio. Further, the first through hole and the electromagnetic valve arranged on the first cavity and the outer wall of the second base are used to solve the problem that the seismic instrument is difficult to recover after being in close contact with the seabed. Specifically, the electromagnetic valve is opened by the signal of the mother ship during recovery, so that the medium pressure inside the second base and the medium pressure outside the second base can cause the medium to flow due to the pressure difference, so that the medium flows around the second base. Unlike the traditional bottom-anchored anchor, the present application uses the medium flow to separate the silt around the second base from the second base, releases the close contact between the second base and the seabed, and facilitates the recovery of the device. In addition, the filling medium in the second base can be used to adjust the weight of the second base at low cost.

[0010] According to an embodiment of the present application, the first cavity is provided with a third base, the third base has a through hole through which the seismic detector can pass, the upper part of the third base is connected to the first cavity through a first spring, the inside of the third base is filled with a flowable medium, and the outer shape of the third base can change according to the flow of the flowable medium. The third base is provided to protect the bottom of the seismic shock absorber. After the device falls, the second base is in impact contact with the seabed. During this process, the third base has a certain gravity, which can guide the device to move stably in the water and not to deviate greatly. On the other hand, under the action of the first spring, the horizontal height of the bottom surface of the third base is lower than that of the seismic detector, so that the impact contact with the seabed can consume the impact force through the third base and the second base, thereby solving the damage of the device to the end of the seismic detector during the impact of the device on the seabed. After the device is on the seabed, the third base deforms to correct the posture of the seismic detector.

[0011] According to an embodiment of the present application, the bottom surface of the second base has a flexible pad, which is used to slow down the impact of the device on the seabed and improve the stable and close contact of the device with the uneven seabed after the device is on the seabed.

[0012] According to an embodiment of the present application, the first lamella is arranged around the side of the second base. By arranging the first lamella around the side of the second base, the water can be rectified and guided during the up-and-down floating of the second base in the seawater, so that the stability of the device in the water can be improved, and the shaking range and drift range of the device in the water can be reduced, so as to ensure that the deviation accuracy of the coordinate position is reduced.

[0013] According to an embodiment of the present application, the hole in the middle of the second base is a second through hole, and the axis of the second through hole is coaxially arranged with the axis of the second base. By arranging the second through hole in the middle of the second base, the seismometer can pass through the second base and be aligned with the axis of the middle of the second base.

[0014] According to an embodiment of the present application, the bottom surface of the first base is connected with the top surface of the second base through a connecting piece. The bottom surface of the first base is arranged in abutment with the top surface of the second base or with a spacing distance. The connecting piece is a double-headed bolt used to fixedly mount the first base and the second base. Compared with a split-type seismograph, the device has a better stability in the water.

[0015] Compared with the prior art, the present application has the following beneficial effects: the integrated structure of the first base and the second base can form a protection for the seismometer, and the vertical state of the seismometer can be corrected by the first base and the second base. After the bottom second base contacts the seabed, the contact between the seismometer and the seabed is ensured, so that the underwater noise is reduced. The first cavity arranged on the bottom surface of the second base can reduce the contact between the middle of the bottom surface of the second base and the seabed, so as to solve the problem that the flat seabed surface causes poor contact between the second base and the seabed surface. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0017] Figure 1 It is a schematic diagram of an integrated environmentally friendly seabed seismograph according to the present application;

[0018] Figure 2 It is a split schematic diagram of an integrated environmentally friendly seabed seismograph according to the present application;

[0019] Figure 3 It is a schematic diagram of a first base structure according to the present application;

[0020] Figure 4 This is a schematic diagram of the floating body solution of the present invention;

[0021] Figure 5 is a schematic diagram of the second base structure of the present invention;

[0022] Figure 6 This is a schematic diagram of another embodiment of the floating body of the present invention;

[0023] Figure 7 Schematic diagram of the internal structure of the second substrate of the present invention;

[0024] Figure 8 This is a schematic diagram of the use of an integrated environmentally friendly seafloor seismometer of the present invention.

[0025] Explanation of the accompanying drawings: 10. First base; 11. Floating body; 12. Rope body; 13. Slot; 14. Extension plate; 20. Earthquake detector; 30. Second base; 31. First blade; 32. First through hole; 33. Second through hole; 34. Filling body; 35. Solenoid valve; 36. Flexible pad; 37. First spring; 38. Third base; 39. First chamber; 40. Connector. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The following first describes the concepts involved in this application with reference to the accompanying drawings. It should be noted that the following description of each concept is intended only to make the content of this application easier to understand and does not limit the scope of protection of this application. At the same time, the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The following detailed description of this application will be made with reference to the accompanying drawings and in conjunction with the embodiments.

[0028] Example 1:

[0029] like Figures 1-8 As shown, an integrated environmentally friendly seafloor seismometer includes a first substrate 10, a through hole is provided in the middle of the first substrate 10 and is equipped with a seismic detector 20, a second substrate 30 is connected below the first substrate 10, a hole is provided in the middle of the second substrate 30, and the seismic detector 20 can pass through the hole, and the first substrate 10 and the second substrate 30 are both truncated cone structures.

[0030] The first base body 10 and the second base body 30 are integrally arranged to form a protection for the seismometer 20, and the first base body 10 and the second base body 30 are used to correct the vertical state of the seismometer 20, and the second base body 30 is in contact with the seabed to ensure the contact between the seismometer 20 and the seabed, thereby reducing the underwater sound noise, specifically, the first base body 10 and the second base body 30 are designed as a conical table structure, so that in the process of the device moving downward in the seawater, the water body is first in contact with the second base body 30 and the bottom surface of the first base body 10, and then in contact with the top surface of the conical table with a smaller diameter, so that the water resistance increases when the device moves downward, thereby reducing the impact force when the device falls to the bottom of the water and reducing the deviation of the device deployment position, and the water flow can also be used to flow along the conical table surface of the first base body 10 and the second base body 30, so that the water flow passing through the device is relatively centered to reduce the deviation distance of the device in the descending process, thereby reducing the difficulty of deployment and recovery.

[0031] The first base body 10 and the second base body 30 are arranged in a structure that the upper diameter is smaller than the lower diameter, by limiting the diameters of the upper and lower ends of the first base body 10 and the second base body 30, the gravity center of the first base body 10 and the second base body 30 is ensured to be below, so that the device can be displaced downward to reduce the deployment precision deviation after being put into the sea.

[0032] The first base body 10 is connected with a floating body 11 through a rope 12, and the floating body 11 is provided with a slot 13 on one side of the first base body 10. An insertion rod motor is arranged in the first base body 10 and matched with the slot 13, the insertion rod motor is used to control the insertion and separation of the floating body 11 and the first base body 10 by controlling the insertion of the insertion rod motor and the slot 13, the floating body 11 is arranged as a release system of the device, when the device needs to be recovered, the insertion rod motor is controlled to separate the floating body 11 from the first base body 10, without the remaining equipment, so that the floating body 11 can quickly float up and the posture stability effect on the sea surface is better and more convenient to find, after the floating body 11 is found, the first base body 10 and the second base body 30 can be quickly recovered by pulling the rope 12. The device can be repeatedly used by adopting the scheme of the present application, for example, after the energy storage battery of the device is replaced, the device can be used again.

[0033] The bottom surface of the second base 30 has a first cavity 39 with a concave structure, the second base 30 is hollow inside and filled with a flowable filling body 34, the outer wall of the second base 30 and the wall of the first cavity 39 are both provided with a first through hole 32, and the second through hole 32 is provided with an electromagnetic valve 35. The scheme of providing the first cavity 39 on the bottom surface of the second base 30 can reduce the contact between the middle part of the bottom surface of the second base 30 and the seabed, so as to solve the problem that the flat seabed surface causes poor contact between the second base 30 and the seabed surface, and the space reserved by the first cavity 39 can provide adjustment space for the angle between the bottom of the seismic detector 20 and the seabed, so as to improve the fitting effect of the seismic detector 20 and the seabed, realize signal reception enhancement, improve the signal-to-noise ratio, and further provide the first through hole 32 and the electromagnetic valve 35 on the first cavity 39 and the outer wall of the second base 30 to solve the problem that the seismic instrument is difficult to recover after being in close contact with the seabed. Specifically, the electromagnetic valve 35 is opened by the mother ship signal control during recovery, so that the medium pressure inside the second base 30 and the medium pressure outside the second base 30 can cause medium exchange flow due to the pressure difference. Thus, a medium flow is formed around the second base 30. Unlike the traditional bottom-anchored anchor, the present application uses a medium flow to separate the silt around the second base 30 from the second base 30, so as to release the close contact state between the second base 30 and the seabed and facilitate the recovery of the device. In addition, the filling medium in the second base 30 can be used to adjust the weight of the second base 30 at low cost.

[0034] The first cavity 39 is provided with a third base 38, the third base 38 has a through hole capable of allowing the seismic detector 20 to pass through, the upper part of the third base 38 is connected to the first cavity 39 through a first spring 37, the inside of the third base 38 is filled with a flowable medium, and the outer shape of the third base 38 can change according to the flow of the flowable medium. The third base 38 is provided to protect the bottom of the seismic detector 20. After the device falls, the second base 30 is in impact contact with the seabed. During this process, the third base 38 has a certain gravity, which can guide the device to move stably in the water and not to deviate greatly. On the other hand, under the action of the first spring 37, the bottom surface of the third base 38 is lower than the seismic detector 20, so that the impact contact with the seabed can consume the impact force through the third base 38 and the second base 30, so as to solve the damage of the device to the end of the seismic detector 20 during the impact of the device on the seabed. After sitting on the bottom, the third base 38 deforms to correct the posture of the seismic detector 20.

[0035] The bottom surface of the second base 37 has a flexible pad 36, which is used to slow down the impact of the device on the seabed and improve the stable and close contact of the device with the uneven seabed after sitting on the seabed.

[0036] The second base 30 is surrounded by a first blade 31. This arrangement of the first blade 31 helps to rectify and guide the water flow as the second base 30 rises and falls in the seawater. This improves the stability of the device as it rises and falls in the water. In particular, after the device is deployed in the water, its swaying amplitude and drift range are reduced, ensuring that the deviation from the launch coordinate position is minimized.

[0037] A second through hole 33 is provided through the middle of the second base 30, and the axis of the second through hole 33 is coaxial with the axis of the second base 30. By providing the second through hole 33 in the middle of the second base 30, the earthquake detector 20 can pass through the second base 30 and be aligned with the middle axis of the second base 30.

[0038] The bottom surface of the first base 10 is connected to the top surface of the second base 30 through a connecting member 40. The bottom surface of the first base 10 and the top surface of the second base 30 are arranged in contact with each other or have a spacing distance. The connecting member 40 is a stud bolt used to achieve fixed installation of the first base 10 and the second base 30. Compared with a split-type seismograph, this device has an integrated structure and better posture stability in water.

[0039] Example 2:

[0040] The difference between this embodiment and embodiment 1 is: Figure 6 As shown, the float 11 is a circular ring structure, and an extension plate 14 with a plate-like structure is arranged around the outside of the float 11. The extension plate 14 is fixedly or swingably connected to the side of the float 11, and holes are provided on the surface of the extension plate 14. The extension plate 14 scheme can enhance the buoyancy of the float 11, and the setting of the extension plate 14 has a collision protection effect corresponding to the outer ring of the float 11, indirectly enhancing the protection of the inner base. In addition, after the float 11 floats on the water surface, the setting of the extension plate 14 can reduce the fluctuation of the waves around the float 11, so as to improve the floating and stable effect of the float 11 on the water surface and increase the probability of the float 11 being discovered.

[0041] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and do not impose any form of limitation on the implementation methods of the technology of the present invention. Any person skilled in the art may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0042] The principles and implementation manners of the present application are described herein by using specific examples, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above descriptions are only preferred embodiments of the present application, and it should be pointed out that, due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, and the above technical features can also be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. An integrated environmentally friendly seafloor seismometer, comprising a first base (10), wherein a through hole is provided in the middle of the first base (10) and a seismic detector (20) is provided, characterized in that: A second base (30) is connected below the first base (10), a hole is provided in the middle of the second base (30), and the earthquake detector (20) can pass through the hole, and both the first base (10) and the second base (30) are truncated cone structures; The bottom surface of the second base (30) has a first cavity (39) with an inner concave structure. The interior of the second base (30) is hollow and filled with a flowable filling body (34). The outer wall of the second base (30) and the wall of the first cavity (39) are both provided with a first through hole (32). A solenoid valve (35) is provided in the first through hole (32). A first blade (31) is arranged around the side of the second base (30).

2. The integrated environmentally friendly ocean bottom seismograph according to claim 1, characterized in that: The first base body (10) and the second base body (30) are both structures in which the upper diameter is smaller than the lower diameter.

3. The integrated environmentally friendly ocean bottom seismograph according to claim 1, characterized in that: The first base (10) is externally connected to a float (11) via a rope (12), and a slot (13) is provided on a side of the float (11) relative to the first base (10); the float (11) is a circular ring structure, and an extension plate (14) with a plate-like structure is arranged around the outside of the float (11), and the extension plate (14) is fixedly connected or swingably connected to the side of the float (11), and holes are provided on the surface of the extension plate (14).

4. The integrated environmentally friendly ocean bottom seismograph according to claim 1, characterized in that: A third substrate (38) is provided in the first chamber (39), and the third substrate (38) has a through hole capable of allowing the earthquake detector (20) to pass through. The upper portion of the third substrate (38) is connected to the first chamber (39) via a first spring (37). The interior of the third substrate (38) is filled with a flowing medium, and the external shape of the third substrate (38) can change according to the flow of the flowing medium.

5. The integrated environmentally friendly ocean bottom seismograph according to claim 1, characterized in that: The bottom surface of the second substrate (30) has a flexible pad (36).

6. The integrated environmentally friendly ocean bottom seismograph according to claim 1, characterized in that: A hole is provided through the middle of the second base body (30), which is a second through hole (33). The axis of the second through hole (33) is coaxial with the axis of the second base body (30).

7. The integrated environmentally friendly ocean bottom seismograph according to claim 1, characterized in that: The bottom surface of the first base (10) is connected to the top surface of the second base (30) via a connecting piece (40); the bottom surface of the first base (10) and the top surface of the second base (30) are arranged in close contact or at a distance from each other.

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