Sea bottom seismograph with automatic leveling function
By designing a fixed ring, a leveling mechanism, and a locking mechanism in the seabed seismograph, and utilizing the principles of gravity and inertia to achieve automatic leveling and locking, the problem of the tilt of the seabed seismograph affecting data quality was solved, and high-precision data recording was achieved.
Patent Information
- Application Number
- CN202510868593.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2025-11-11
AI Technical Summary
The tilting of the seabed seismometer affects its normal operation, and existing technologies are unable to achieve automatic leveling and locking, resulting in a decline in data quality.
A seabed seismograph was designed, comprising a fixed ring, a leveling mechanism, and a locking mechanism. It achieves automatic leveling using the principles of gravity and inertia, and ensures the seismograph is horizontal through a linear motor and a locking disc. The inner and outer bases are connected by bearings, and the bearing positions are locked using a linear motor and a conical top rod.
Automatic leveling and locking of the seabed seismograph have been achieved, simplifying the operation process and improving the accuracy and reliability of the data. The leveling accuracy can reach within 1°, ensuring normal recording of seismic data.
Smart Images
Figure CN120926347A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of marine seismic observation technology, and in particular to a seabed seismograph with an automatic leveling function. Background Technology
[0002] Natural seismic waves have a very wide frequency band, therefore different types of seismic instruments are needed depending on the seismic observation frequency band, including short-period seismographs, broadband seismographs, and very broadband seismographs. For submarine seismic observation, it is also necessary to select a seismic instrument suitable for the submarine seismic observation frequency band.
[0003] Seismic instruments are highly precise, especially sensitive in terms of azimuth. If an instrument is tilted beyond its permissible limits, it will severely affect its normal operation, consequently impacting the quality of the recorded data and potentially leading to erroneous data. Therefore, leveling is necessary before use to ensure proper functioning. On land, leveling and locking seismic instruments is relatively simple, currently achieved primarily by manually or automatically adjusting the adjusting nuts at the bottom of the instrument, combined with a level to ensure it is horizontal. However, for seismic instruments operating on the seabed, leveling and locking cannot be performed in the same way as on land. Furthermore, seabed seismic instruments, operating on the ocean floor, cannot be viewed as easily as those on land.
[0004] Therefore, there is an urgent need for a seabed seismograph with automatic leveling function, which can automatically level and lock the seismograph in the seabed environment. That is, it can automatically adjust the position of the seismograph to ensure that it is horizontal and lock the seismograph so as to record seismic data normally. This would greatly simplify the operation process of seabed seismic observation and improve the accuracy and reliability of the data. Summary of the Invention
[0005] The purpose of this invention is to provide a seabed seismograph with an automatic leveling function, which can automatically level and lock on the seabed to ensure that seismic data can be recorded normally.
[0006] This invention provides a seabed seismograph with automatic leveling function, comprising: a seismograph;
[0007] A fixed ring is provided, and the seismograph is installed inside the fixed ring, with the center of gravity of the seismograph being lower than the top surface of the fixed ring.
[0008] The leveling mechanism includes an inner base and an outer base. There are four inner bases, which are vertically connected and arranged around the outside of the fixed ring. Two of the inner bases arranged opposite each other are connected to the outer periphery of the fixed ring through a first bearing. The outer bases are provided on the outer sides of the other two opposite inner bases. The outer bases are connected to the inner bases on their inner sides through a second bearing. The axes of the two first bearings are collinear, the axes of the two second bearings are collinear, and the axes of the first bearings and the second bearings are coplanar. The intersection of the axes is higher than the center of gravity of the seismograph.
[0009] The locking mechanism includes a first locking plate and a second locking plate that are coaxially and fixedly connected to the first bearing and the second bearing, respectively. The first locking plate and the second locking plate are respectively adapted to a push rod assembly disposed on one side of them to lock the relative position of the first bearing and the inner base and the relative position of the second bearing and the outer base.
[0010] Preferably, the push rod assembly includes a linear motor and a tapered push rod mounted on its head.
[0011] Preferably, the two sets of linear motors are fixed to the outer surfaces of the adjacent inner base and outer base by motor supports and bolts, respectively.
[0012] Preferably, both the first locking disc and the second locking disc have continuously arranged conical holes on their outer periphery.
[0013] Preferably, the distance between the centers of adjacent conical holes is less than the sum of their radii.
[0014] Preferably, the device further includes a controller for controlling the locking mechanism to lock the first bearing and the second bearing.
[0015] Preferably, it also includes a temperature sensor and a pressure sensor, and the controller is able to receive the detection results of the temperature sensor and the pressure sensor, and then send operation commands to the locking mechanism.
[0016] Preferably, the inner end of the first bearing is fixedly connected to the fixing ring, the outer end of the first bearing is rotatably connected to the inner base, and the outer end of one of the first bearings extends out of the inner base and is fixedly connected to the first locking disc; the inner end of the second bearing is fixedly connected to the inner base, the outer end of the second bearing is rotatably connected to the outer base, and the outer end of one of the second bearings extends out of the outer base and is fixedly connected to the second locking disc.
[0017] Preferably, the bottom of the outer base is fixed to the surface of the counterweight plate, and a sealed metal shell is provided on the counterweight plate. The seismograph, the fixing ring, the leveling mechanism and the locking mechanism are all located inside the sealed metal shell.
[0018] Preferably, the bottom of the counterweight plate is fixed with three vertically extending inserts, which are used to connect with the seabed.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] 1. This invention provides a fixing ring at the bottom of the seismograph and a leveling mechanism on its outer side. The inner base and the first bearing arranged on opposite sides of the leveling mechanism ensure that the seismograph rotates relative to the inner base around the axis of the first bearing. The outer base, the inner base, and the second bearing are arranged on the other opposite side, allowing the seismograph and the inner base to rotate together around the axis of the second bearing relative to the outer base. Since the center of gravity of the seismograph is lower than the first and second bearings, it can be leveled within a 360° range under the action of gravity through the automatic driving leveling mechanism. After leveling, the position of the first and second bearings can be locked by the locking mechanism to ensure that the seismograph can work normally. The above structure solves the problem that it is difficult for seabed seismographs to achieve automatic leveling and locking, and the implementation method is simpler and more reliable.
[0021] 2. It simplifies the operational procedures for submarine seismic observation, enabling it to record seismic data normally and improving the accuracy and reliability of the data;
[0022] 3. The leveling method is accurate and reliable, with a leveling accuracy of within 1°, ensuring the normal operation of the seabed seismograph. Attached Figure Description
[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0024] Figure 1 This is a three-dimensional schematic diagram of the main structure of the seabed seismograph of the present invention. Figure 1 ;
[0025] Figure 2 This is a three-dimensional schematic diagram of the main structure of the seabed seismograph of the present invention. Figure 2 ;
[0026] Figure 3 This is a front view schematic diagram of the locking mechanism in this invention;
[0027] Figure 4 This is a top view schematic diagram of a partial structure of the seabed seismograph of the present invention;
[0028] Figure 5 This is a cross-sectional view of the sealing and fixing structure attached to the seabed seismograph of the present invention.
[0029] Explanation of reference numerals in the attached figures:
[0030] 1: Seismograph; 2: Fixing ring; 3: Inner base; 4: Outer base; 501: First bearing; 502: Second bearing; 601: First locking disc; 602: Second locking disc; 603: Linear motor; 604: Motor support; 605: Conical top rod; 606: Conical hole; 7: Counterweight plate; 8: Sealed metal shell; 9: Insert rod. Detailed Implementation
[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do 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. Therefore, they should not be construed as limiting this invention.
[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0034] like Figure 1-4 As shown, the present invention provides a seabed seismograph with automatic leveling function, comprising: a seismograph 1, a fixing ring 2, a leveling mechanism and a locking mechanism. The seismograph 1 is cylindrical and is fixedly installed on the inner side of the top of the fixing ring 2. The center of gravity of the seismograph 1 is lower than the top surface of the fixing ring 2. The fixing ring 2 is cylindrical in shape and is a detachable structure. Its joints are locked by bolts and nuts. An annular platform supporting the bottom of the seismograph 1 can be set on its inner side. After the seismograph 1 is placed, it is tightened on the outer side by bolts and nuts.
[0035] The leveling mechanism includes inner bases 3 and outer bases 4. There are four inner bases 3, vertically connected and surrounding the outer side of the fixing ring 2. Two opposing inner bases 3 are in contact with the outer periphery of the fixing ring 2 and connected to it via first bearings 501. The inner end of the first bearing 501 is fixedly connected to the fixing ring 2, and the outer end of the first bearing 501 is rotatably connected to the inner base 3. The axes of the two first bearings 501 are collinear and located on the diameter and extension of a cross-section circle perpendicular to the axis of the fixing ring 2. The other two opposing inner bases 3 are connected to the outer periphery of the fixing ring 2. There is a certain gap on the outer periphery, and an outer base 4 is provided on the outer side of each of the two inner bases 3. The two outer bases 4 are connected to the inner bases 3 on their inner sides through the second bearing 502. The inner end of the second bearing 502 is fixedly connected to the inner base 3, and the outer end of the second bearing 502 is rotatably connected to the outer base 4. The axes of the two second bearings 502 are collinear and located on the diameter of a cross-section circle perpendicular to the axis of the fixed ring 2 and its extension. The line connecting the axes of the first bearing 501 and the line connecting the axes of the second bearing 502 are coplanar and perpendicular, and the intersection of the axes is higher than the center of gravity of the seismograph 1. Because the center of gravity of seismograph 1 is lower than the plane containing the axes of the four bearings, utilizing the principle of inertia, as long as seismograph 1 tilts, it can rotate within a certain angle relative to the inner base 3 around the axis of the first bearing 501 under the influence of its own gravity. Furthermore, seismograph 1, along with the fixed ring 2 and the inner base 3, can rotate within a certain angle relative to the outer base 4 around the axis of the second bearing 502, thus ultimately stopping it in a horizontal plane and ensuring the levelness of the seismograph 1 surface. This leveling mechanism enables the device to automatically level within a 360° range under the influence of gravity, with a leveling accuracy within 1°, ensuring accurate leveling and thus guaranteeing the normal recording of seismic data from submarine earthquakes, improving the accuracy and reliability of the data.
[0036] The locking mechanism includes a first locking disc 601 and a second locking disc 602, which are coaxially and fixedly connected to the first bearing 501 and the second bearing 502, respectively. The outer end of the first bearing 501 extends from the inner base 3 and is fixedly connected to the first locking disc 601. The outer end of the second bearing 502 extends from the outer base 4 and is fixedly connected to the second locking disc 602. That is, the first locking disc 601 and the second locking disc 602 are located on adjacent sides. The first locking disc 601 and the second locking disc 602 are respectively adapted and locked with the push rod assembly provided on one side of them. Thus, after the seismograph 1 is automatically adjusted to the horizontal plane by the leveling mechanism, the relative position of the first bearing 501 and the inner base 3 and the relative position of the second bearing 502 and the outer base 4 are locked by the locking mechanism, thereby keeping the seismograph 1 in a horizontal state.
[0037] Specifically, both sets of push rod assemblies include a linear motor 603 and a conical push rod 605 mounted on its head. When the seismograph 1 is automatically leveled by the leveling mechanism under the action of gravity, the linear motor is controlled to move, so that the conical push rods at its head press against the outer periphery of the first locking plate 601 and the second locking plate 602 respectively, so that the first bearing 501 and the second bearing 502 fixedly connected to them remain in a locked state, preventing relative rotation between them and the inner base 3 or the outer base 4, keeping the seismograph 1 in a horizontal state, entering the normal working mode, and ensuring that its measurement data is normal.
[0038] In this embodiment, two sets of linear motors 603 are fixed to the outer surfaces of a set of adjacent inner bases 3 and outer bases 4 via motor supports 604 and bolts, respectively. The outer periphery of both the first locking disc 601 and the second locking disc 602 is provided with continuously arranged conical holes 606, and the center distance between adjacent conical holes 606 is less than the sum of their radii, thereby ensuring that the conical push rod 605 of the head of the linear motor 603 can be accurately and reliably inserted into the conical holes 606 on the outer periphery of the first locking disc 601 and the second locking disc 602.
[0039] The invention also includes a controller for controlling the locking mechanism to lock the first bearing 501 and the second bearing 502. The seismograph 1 is connected to the controller via a cable. The cable is led out from the seismograph 1 through the inner hole of the first bearing 501 (without the first locking disc 501 and the outer base 4) which is connected to the fixing ring 2 and the inner base 3, then around the inner base 3 for half a turn, and then through the inner hole of the second bearing 502 (without the second locking disc 502) which is connected to the inner base 3 and the outer base 4 to connect to external equipment, thereby minimizing the impact of the cable on the leveling mechanism.
[0040] In this embodiment, a temperature sensor and a pressure sensor are also included. The controller can receive the detection results from the temperature sensor and the pressure sensor, and while the seismograph is monitoring seismic data, it can also record data such as temperature and pressure of the seabed environment where the seismograph is located.
[0041] like Figure 5 As shown, the bottom of the outer base 4 is fixed to the surface of the counterweight plate 7, and a sealed metal shell 8 is provided on the counterweight plate 7. The seismograph 1, the fixing ring 2, the leveling mechanism, and the locking mechanism are all located inside the sealed metal shell 8. The sealed metal shell 8 is used to prevent seawater from corroding the seismograph 1, various bearings, circuits, sensors, and other equipment.
[0042] Three vertically extending rods 9 are fixed to the bottom of the counterweight plate 7. The three rods 9 are arranged in a triangle. The rods 9 are used to fix the position of the entire device. The whole device can make good contact with the rocks on the seabed, so that the seismograph can record data correctly and improve the quality of the data.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A seabed seismograph with automatic leveling function, characterized in that, include: Seismograph; A fixed ring is provided, and the seismograph is installed inside the fixed ring, with the center of gravity of the seismograph being lower than the top surface of the fixed ring. The leveling mechanism includes an inner base and an outer base. There are four inner bases, which are vertically connected and arranged around the outside of the fixed ring. Two of the inner bases arranged opposite each other are connected to the outer periphery of the fixed ring through a first bearing. The outer bases are provided on the outer sides of the other two inner bases arranged opposite each other. The outer bases are connected to the inner bases on their inner sides through a second bearing. The axes of the two first bearings are collinear, the axes of the two second bearings are collinear, and the axes of the first bearings and the second bearings are coplanar. The intersection of the lines connecting the axes is higher than the center of gravity of the seismograph. The locking mechanism includes a first locking plate and a second locking plate that are coaxially and fixedly connected to the first bearing and the second bearing, respectively. The first locking plate and the second locking plate are respectively adapted to a push rod assembly disposed on one side of them to lock the relative position of the first bearing and the inner base and the relative position of the second bearing and the outer base.
2. The seabed seismograph with automatic leveling function according to claim 1, characterized in that, The push rod assembly includes a linear motor and a tapered push rod mounted on its head.
3. The seabed seismograph with automatic leveling function according to claim 2, characterized in that, The two sets of linear motors are respectively fixed to the outer surfaces of the adjacent inner base and the outer base by motor supports and bolts.
4. The seabed seismograph with automatic leveling function according to claim 1, characterized in that, Both the first locking disc and the second locking disc have continuously arranged conical holes on their outer periphery.
5. The seabed seismograph with automatic leveling function according to claim 4, characterized in that, The distance between the centers of adjacent conical holes is less than the sum of their radii.
6. The seabed seismograph with automatic leveling function according to claim 1, characterized in that, It also includes a controller for controlling the locking mechanism to lock the first bearing and the second bearing.
7. The seabed seismograph with automatic leveling function according to claim 6, characterized in that, It also includes a temperature sensor and a pressure sensor. The controller can receive the detection results from the temperature sensor and the pressure sensor, and then send operation commands to the locking mechanism.
8. The seabed seismograph with automatic leveling function according to claim 1, characterized in that, The inner end of the first bearing is fixedly connected to the fixed ring, the outer end of the first bearing is rotatably connected to the inner base, and the outer end of one of the first bearings extends out of the inner base and is fixedly connected to the first locking disc. The inner end of the second bearing is fixedly connected to the inner base, the outer end of the second bearing is rotatably connected to the outer base, and the outer end of one of the second bearings extends out of the outer base and is fixedly connected to the second locking disc.
9. The seabed seismograph with automatic leveling function according to claim 1, characterized in that, The bottom of the outer base is fixed to the surface of the counterweight plate, and a sealed metal shell is provided on the counterweight plate. The seismograph, the fixing ring, the leveling mechanism and the locking mechanism are all located inside the sealed metal shell.
10. The seabed seismograph with automatic leveling function according to claim 9, characterized in that, The bottom of the counterweight plate is fixed with three vertically extending inserts, which are used to connect with the seabed.