Dual release system for a seafloor seismometer

Abstract

The present application relates to the technical field of ocean bottom seismometer, in particular to a double release system of ocean bottom seismometer, the cabin ball and the mechanical releaser are arranged on the fixed support panel, the cabin ball is provided with the electrochemical fuse release assembly and the rotating rod, the mechanical releaser is connected with the battery cabin ball through the cable; the sink coupling frame is connected below the fixed support panel, the sink coupling frame comprises the chassis and multiple struts, the pulley is arranged between two struts, one end of the fixed wire is connected with the unhooking sleeve, the other side of the fixed wire is wound through the pulley and is sleeved with the rotating rod through the fixed support panel, the cabin ball, the fixed support panel and the sink coupling frame form an integral whole. The present application provides an ocean bottom seismometer with chemical and mechanical double release modes, the mechanical releaser with large volume and weight is improved, and is combined with the chemical release to form the OBS system with chemical and mechanical double release modes, two release modes are triggered at the same time, and the OBS can be successfully released when any release is successful.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean bottom seismometer, in particular to a double release system of ocean bottom seismometer. BACKGROUND

[0002] Ocean bottom seismometer (OBS) is an observation instrument which directly places the detector on the seabed to receive various signals, including sensor unit, recording unit, storage unit, control unit and release unit, etc., and is expensive. OBS works in the sea and has to resist the external factors such as huge water pressure, complex seabed environment and seawater corrosion, etc. Therefore, the recovery of OBS placed in the sea for a long time has always been a great challenge. In actual work, the successful recovery of the instrument can not only obtain complete detection data, but also reduce the loss of equipment property for the scientific researchers.

[0003] At present, the commonly used OBS at home and abroad is SEDIS VI type OBS, MicrOBS and I-7C type OBS. Although the appearance and the suspension mode of the three OBSs are different, the three OBSs are all released by burning the fuse through electrochemical corrosion. The release principle is that the ship-borne acoustic release unit sends ultrasonic waves carrying instructions through the deck sonar probe, the built-in hydrophone of OBS receives the sound waves of a specific frequency, converts the sound signal into an electric signal, triggers the internal release module to load voltage on both ends of the fuse, and in the environment of seawater electrolyte, the iron fuse exposed in seawater reacts with the cathode plate, causing the fuse to corrode and break. The steel cable connecting the sinker and the lever arm rotates downward and falls off due to the loss of the force fulcrum, the instrument cabin is separated from the sinker, and the OBS floats to the water surface by its own buoyancy. However, the electrochemical corrosion release mode is often affected by the release voltage and different water environments, and in some cases, such as insufficient release voltage, damage of release module caused by water entering the instrument cabin or growth of fouling organisms leading to insulation of the fuse from seawater, etc., the instrument release and recovery are prone to fail. It is urgent to find a safe and efficient release mode.

[0004] Secondly, mechanical release has safety and stability, and is commonly used in large ocean exploration instruments. However, the existing mechanical release on the market is large in size and weight, which on the one hand affects the sinking and floating buoyancy and posture of OBS, and on the other hand is limited by the OBS instrument platform, and is not suitable for OBS platforms with small size.

[0005] At present, the release system of ocean bottom seismometer at home and abroad all adopts a single electrochemical release mode. This release mode not only has high requirements for its own materials, process and battery voltage, but also is greatly affected by the outside world. Once the fuse is not damaged and insulated from seawater, this mode will completely fail.

[0006] In 2009, 20 OBSs were deployed in the southern South China Sea during the 973 cruise. However, only 5 OBSs were recovered due to the defects of the fuse release system, with a recovery rate of only 25%. The instrument loss was heavy, and the data was seriously missing (Qiu X L et al., 2012). In 2015, 53 OBSs were deployed in the Pearl River Mouth Sea during the joint 3D deep seismic exploration of the Pearl River Mouth Sea. However, only 25 OBSs were recovered, with a recovery rate of less than 50%. Through investigation of the OBSs recovered by the later drag net, it was found that a large number of OBSs were attached by fouling organisms, resulting in insulation of the fuse wire and failure to release by electrochemical method. SUMMARY

[0007] The purpose of the present application is to solve the problems existing in the prior art, i.e., the single mechanical release or electrochemical fuse release cannot guarantee the release effect. The present application provides a double release system for a submarine seismograph.

[0008] In order to solve the problems existing in the prior art, the present application adopts the following technical scheme:

[0009] The double release system for a submarine seismograph comprises a mechanical releaser, an electrochemical fuse release assembly, at least two ball tanks, a fixed support panel, a sinking coupling frame, a fixed steel wire and an unhooking sleeve.

[0010] The at least two ball tanks are arranged on the fixed support panel, the upper part of the ball tank is provided with the electrochemical fuse release assembly, the upper part of the electrochemical fuse release assembly is provided with a rotating rod, and the at least two ball tanks comprise an instrument ball tank and a battery ball tank.

[0011] The mechanical releaser is fixed on the fixed support panel and arranged beside the ball tank, and the mechanical releaser is connected with the battery ball tank through a cable.

[0012] The sinking coupling frame is connected below the fixed support panel, the sinking coupling frame comprises a base frame and a plurality of support columns upwardly extending from the base frame, a pulley is arranged between two of the support columns, one end of the fixed steel wire is connected with the unhooking sleeve, the other side of the fixed steel wire is wound around the pulley and passes through the fixed support panel and the rotating rod sleeve, and the at least two ball tanks, the fixed support panel and the sinking coupling frame form an integral whole.

[0013] As an improvement of the technical scheme of the double release system for a submarine seismograph, the sinking coupling frame comprises six support columns, the base frame is in a square shape, the six support columns are arranged at the four corners and the middle part of the base frame, respectively, a pulley support plate is transversely arranged between the two support columns arranged at the middle part, and the pulley is arranged on the pulley support plate.

[0014] As an improvement of the technical scheme of the double release system of the marine seismograph, the lower surface of the fixed support panel is provided with six limiting sleeves matched with the struts, and the six limiting sleeves are respectively and one-to-one matched with the six struts.

[0015] As an improvement of the technical scheme of the double release system of the marine seismograph, the chassis is further provided with four extension rods, the four extension rods are respectively arranged at the four corners of the chassis, and each of the extension rods extends outward along the width direction of the chassis, and each of the extension rods is connected with a flow guide cylinder.

[0016] As an improvement of the technical scheme of the double release system of the marine seismograph, two through holes matched with the instrument cabin ball and the battery cabin ball are formed in the fixed support panel, and the instrument cabin ball and the battery cabin ball are arranged in the two through holes respectively.

[0017] As an improvement of the technical scheme of the double release system of the marine seismograph, the mechanical release includes a pressure-resistant cabin, a power connector, a DC motor, a motor shaft, a fixed support plate and a hook shaft.

[0018] The fixed support plate is horizontally arranged at the lower part of the outer wall of the pressure-resistant cabin, and the upper surface of the fixed support plate is connected with the lower surface of the fixed support panel.

[0019] The pressure-resistant cabin is a hollow cylinder, the power connector and the DC motor are arranged in the pressure-resistant cabin, the power connector is connected with the upper part of the DC motor, the motor shaft of the DC motor extends downward and out of the pressure-resistant cabin and is connected with the hook shaft, and the motor shaft and the hook shaft are coaxially arranged.

[0020] As an improvement of the technical scheme of the double release system of the marine seismograph, the unhooking sleeve is a hollow cuboid, and a third through hole and a fourth through hole are formed on the same side of the unhooking sleeve.

[0021] One end of the fixed steel wire is connected with the unhooking sleeve through the third through hole, and the hook shaft is connected with or separated from the unhooking sleeve through the fourth through hole.

[0022] When the hook shaft is perpendicular or nearly perpendicular to the unhooking sleeve, the unhooking sleeve is connected with the hook shaft, and when the hook shaft is parallel to the unhooking sleeve, the unhooking sleeve is separated from the hook shaft.

[0023] As an improvement of the technical scheme of the double release system of the marine seismograph, the electrochemical fuse release assembly further includes a transducer, and the transducer is arranged on the upper part of the electrochemical fuse release assembly.

[0024] As an improvement of the technical scheme of the double release system of the marine seismograph, the control system is further included, the control system includes a power module, a receiving module, a transmitting module and a release module, the power module is connected with the receiving module, the transmitting module and the release module respectively, the receiving module is connected with the transmitting module and the release module respectively;

[0025] The receiving module includes a single-chip microcomputer and a frequency decoder connected with the single-chip microcomputer respectively, the frequency decoder is connected with the transmitting module, and the transmitting module is used for controlling the transmitting of the transducer;

[0026] The release module is connected with the mechanical releaser and the electrochemical fuse release assembly respectively, and is used for the release of the electrochemical fuse release assembly and the release of the mechanical releaser.

[0027] As an improvement of the technical scheme of the double release system of the marine seismograph, the frequency decoder is used for sending a release code to the mechanical releaser and the electrochemical fuse release assembly, and the release code is the same or different release code.

[0028] The beneficial effects of the present application are as follows:

[0029] The marine seismograph with the chemical and mechanical double release modes provided by the present application optimizes and improves the mechanical releaser with large volume and weight into the size and weight suitable for OBS, and combines the chemical release to form the OBS system with the chemical and mechanical double release modes, the two release modes are triggered at the same time, and any one release success can successfully release the OBS, which greatly improves the release success rate of the OBS, and the success rate can reach 99.9%. Especially, in the case that the OBS is observed for 6-12 months or even longer, the release system of the instrument has high requirements, the single chemical release is easily affected by the long-time water environment to cause release failure, the mechanical release has high stability and high release success rate, the reliability of the double release is verified through theory and experimental test, the double release will play an important role in future OBS long-term observation and other marine equipment, has high engineering application value, and promotes the development of domestic self-equipment. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The figure is a structural schematic diagram of the present application;

[0031] Figure 2 The figure is a structural schematic diagram of the mechanical releaser in the present application;

[0032] Figure 3 The figure is a structural schematic diagram of the sink coupling frame in the present application;

[0033] Figure 4 The structure diagram of the unhooking sleeve in the application;

[0034] Figure 5 The circuit connection diagram of the control system in the application.

[0035] The fixed support panel 1, the mechanical releaser 2, the instrument cabin ball 3, the battery cabin ball 4, the limiting sleeve 5, the sinking coupling frame 6, the bottom frame 7, the support column 8, the flow guide cylinder 9, the pulley 10, the pulley support plate 11, the extension rod 12, the fixed steel wire 13, the fixed support plate 14, the pressure-resistant cabin body 15, the power connector 16, the direct current motor 17, the motor rotating shaft 18, the hook shaft 19, the unhooking sleeve 20, the third through hole 21, the fourth through hole 22, the rotating rod 23, and the transducer 24. DETAILED DESCRIPTION

[0036] In order to make the application purpose, technical scheme and beneficial effects of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments.

[0037] As shown in the drawings, Figures 1 to 5 The double release system of the submarine seismograph comprises the mechanical releaser 2, the electrochemical fuse release assembly, at least two cabin balls, the fixed support panel 1, the sinking coupling frame 6, the fixed steel wire 13 and the unhooking sleeve 20.

[0038] The at least two cabin balls are arranged on the fixed support panel 1, the upper part of the cabin ball is provided with the electrochemical fuse release assembly, the upper part of the electrochemical fuse release assembly is provided with the rotating rod 23, and the at least two cabin balls comprise the instrument cabin ball 3 and the battery cabin ball 4.

[0039] The mechanical releaser 2 is fixed on the fixed support panel 1 and arranged beside the cabin ball, and the mechanical releaser 2 is connected with the battery cabin ball 4 through the cable.

[0040] The sinking coupling frame 6 is connected below the fixed support panel 1, the sinking coupling frame 6 comprises the bottom frame 7 and a plurality of support columns 8 upwardly extending on the bottom frame 7, two support columns 8 among the plurality of support columns 8 are provided with the pulley 10, one end of the fixed steel wire 13 is connected with the unhooking sleeve 20, the other side of the fixed steel wire 13 is wound around the pulley 10 and passes through the fixed support panel 1 to be sleeved with the rotating rod 23, and the at least two cabin balls, the fixed support panel 1 and the sinking coupling frame 6 form an integral whole.

[0041] The present application releases the mechanical releaser 2 and the electrochemical fuse release assembly at the same time, and both of the two release devices are released as soon as one of them is successfully released. The release experiment based on the present application proves that the mechanical release can be completed in 5-10 seconds, and the success rate is more than 95%, while the electrochemical fuse release needs 3-5 minutes, and the success rate is lower in special water environment. After successful release, the cabin ball and the fixed panel are separated from the sink coupling frame 6 and float to the sea surface.

[0042] In detail, the instrument cabin ball 3 and the battery cabin ball 4 are arranged on the fixed support panel 1, the mechanical releaser 2 is fixed to the fixed support panel 1 through bolts, and is connected to the battery cabin ball 4 through a cable, the bottom frame 7 of the sink coupling frame 6 is connected to the fixed support panel 1 through a plurality of support columns 8, which can better couple and prevent the instrument cabin ball 3 from being displaced by water flow. One end of the fixed wire 13 is connected to the unhooking sleeve 20, and the other side of the fixed wire 13 is wound around the pulley 10 and passes through the fixed support panel 1 to be sleeved with the rotating rod 23, and at least two cabin balls, the fixed support panel 1 and the sink coupling frame 6 form an integral whole.

[0043] The present application adopts the design idea of double balls of the instrument cabin ball 3 and the battery cabin ball 4, and simultaneously adopts the mechanical release and the electrochemical fuse release, which improves the recovery rate of the OBS instrument, has the advantages of short release time, high success rate and long-time bottom working compared with the traditional single electrochemical fuse release, and provides a more stable base for the seafloor seismograph working on the seafloor compared with the current vertical double-ball seismograph.

[0044] As a first embodiment of the present application, the sink coupling frame 6 comprises a bottom frame 7 and six support columns 8 arranged on the bottom frame 7, the bottom frame 7 is square-shaped, the six support columns 8 are arranged at the four corners and the middle position of the bottom frame 7 respectively, a pulley support plate 11 is horizontally arranged between the two support columns 8 arranged at the middle position, and the pulley 10 is arranged on the pulley support plate 11.

[0045] Further, the bottom of the fixed support panel 1 is provided with six limiting sleeves 5 matched with the support columns 8, and the six limiting sleeves 5 are sleeved with the six support columns 8 one by one, so that the sink coupling frame 6 and the fixed support panel 1 can be connected through the matched sleeving of the support columns 8 and the limiting sleeves 5. Further, the bottom frame 7 is further provided with four extension rods 12 arranged at the four corners of the bottom frame 7 and extending outward along the width direction of the bottom frame 7, and each extension rod 12 is connected with a flow guide cylinder 9. When a fast flowing water flow is encountered, the water flow will cause the sink coupling frame 6 to vibrate, and the flow guide cylinder 9 can buffer the sink coupling frame 6 to avoid excessive vibration affecting the service life of the sink coupling frame 6.

[0046] The fixed support panel 1 is provided with two through holes respectively matched with the instrument cabin ball 3 and the battery cabin ball 4, which are a first through hole and a second through hole respectively, the first through hole is matched with the instrument cabin ball 3, and the second through hole is matched with the battery cabin ball 4, the instrument cabin ball 3 and the battery cabin ball 4 are correspondingly arranged in the first through hole and the second through hole, and the instrument cabin ball 3 and the battery cabin ball 4 are arranged on the fixed support panel 1 through the first through hole and the second through hole.

[0047] The mechanical releaser 2 comprises a pressure-resistant cabin body 15, a power connector 16, a direct current motor 17, a motor shaft 18, a fixed support plate 14 and a hook shaft 19; the fixed support plate 14 is horizontally arranged at the lower part of the outer wall of the pressure-resistant cabin body 15, and the upper surface of the fixed support plate 14 is connected with the lower surface of the fixed support panel 1.

[0048] The pressure-resistant cabin body 15 is a hollow cylinder, the power connector 16 and the direct current motor 17 are arranged in the pressure-resistant cabin body 15, the power connector 16 is connected with the upper part of the direct current motor 17, the motor shaft 18 of the direct current motor 17 extends downward and out of the pressure-resistant cabin body 15 and is connected with the hook shaft 19, and the motor shaft 18 and the hook shaft 19 are coaxially arranged.

[0049] The power connector 16 provides power for the direct current motor 17, the motor shaft 18 of the direct current motor 17 is connected with the hook shaft 19, when the direct current motor 17 is started and runs, the motor shaft 18 rotates and drives the hook shaft 19 to rotate.

[0050] Preferably, the pressure-resistant cabin body 15 is made of titanium alloy material, so that the mechanical releaser 2 has a lighter weight.

[0051] Further, the unhooking sleeve 20 is in the shape of a hollow cuboid, the third through hole 21 and the fourth through hole 22 are arranged on the same side of the unhooking sleeve 20; the third through hole 21 is fixedly connected with the sink coupling frame 6 through the steel wire rope; the hook shaft 19 passes through the fourth through hole 22 and is connected with or separated from the unhooking sleeve 20.

[0052] When the hook shaft 19 is perpendicular or nearly perpendicular to the unhooking sleeve 20, the unhooking sleeve 20 is connected with the hook shaft 19; when the hook shaft 19 is parallel to the unhooking sleeve 20, the unhooking sleeve 20 is separated from the hook shaft 19.

[0053] Preferably, the fourth through hole 22 is a rectangular through hole, which can ensure the connection effect when the hook shaft 19 is connected with the unhooking sleeve 20, and can ensure the separation effect when the hook shaft 19 is parallel to the unhooking sleeve 20.

[0054] In detail, in the process of mechanical release, the mechanical release 2 drives the rotation of the motor shaft 18 by the DC motor 17 to achieve the purpose of mutual disengagement with the decoupling frame 6, which needs to match the unhooking of the release mode. In the present application, when the hook shaft 19 of the mechanical release 2 is perpendicular or close to perpendicular to the fourth through hole 22 of the unhooking sleeve 20, the unhooking sleeve 20 is connected with the hook shaft 19, at this time the two are in a fixed state; when the hook shaft 19 of the mechanical release 2 is parallel to the fourth through hole 22 of the unhooking sleeve 20, the unhooking sleeve 20 is disconnected with the hook shaft 19, at this time it is in a released state. The rotation of the motor shaft 18 of the DC motor 17 changes the perpendicularity or parallelism between the hook shaft 19 and the unhooking sleeve 20, so as to achieve the purpose of switching between the fixed and released states. Preferably, the unhooking sleeve 20 is made of steel material, and 304 steel or 316 steel is the best.

[0055] The electrochemical fuse release assembly also includes a transducer 24 arranged on the upper part of the electrochemical fuse release assembly. As shown in the figure, since the two cabin balls are provided with electrochemical fuse release assemblies, during use, the transducer on the battery cabin ball 4 and the rotating rod on the instrument cabin ball 3 can be used as needed. Figure 1

[0056] Further, the present application also includes a control system, which includes a power module, a receiving module, a transmitting module and a release module, the power module is connected with the receiving module, the transmitting module and the release module respectively, the receiving module is connected with the transmitting module and the release module respectively; the receiving module includes a single-chip microcomputer and a frequency decoder connected with the single-chip microcomputer respectively; the transmitting module is connected with the transducer 24, and is used for controlling the transducer 24 to emit; the release module is connected with the mechanical release 2 and the electrochemical fuse release assembly respectively, and is used for the release of the electrochemical fuse release assembly and the mechanical release 2, wherein the receiving module includes a control unit. Further, the frequency decoder is used for sending a release code to the mechanical release 2 and the electrochemical fuse release assembly, and the release code is the same or different.

[0057] In detail, the power module provides 12V voltage for the release module, which can achieve the effect of electrolytic fuse release of the conventional fuse wire, and the release time is about 3-5 minutes, which is relatively long; at the same time, since the transmitting module is connected with the transducer 24, and the transducer 24 is preferably an acoustic transducer 24, when the acoustic transducer 24 receives the sound wave signal sent by the control unit, the sound wave signal is converted into an electric signal, and then a release command is sent to the DC motor 17, the DC motor 17 in the mechanical release 2 starts to rotate, and the motor shaft 18 thereof drives the hook shaft 19 to rotate through the shaft coupling, when the hook shaft 19 is disconnected with the unhooking sleeve 20, the mechanical release is realized, and the release time is about 5-10 seconds, which is relatively short. ​

[0058] In order to make the mechanical release compatible with and work with the electrochemical fuse release, under the premise of meeting the most basic requirement of safe recovery, the mechanical release 2 is miniaturized and lightened in the application, so as to be applicable to OBS platform observation; the two release systems are provided with different release codes, so as to achieve the purpose of double release and double insurance; the two release modes are compatible, and the appearance of the existing OBS base and the like needs to be more reasonably designed.

[0059] Therefore, as one embodiment of the pressure-resistant cabin 15, the pressure-resistant cabin 15 is made of titanium alloy material, the size is (mm) (length x diameter): 280 x 66; the mass is 1.5 Kg; the motor voltage is DC: 12V; the motor rotating speed is 10 rpm; the working water depth is 6000 m; the maximum load is 100 Kg; and the safe recovery period is 2 years.

[0060] Moreover, in the application, not only the mechanical release 2 is improved, but also the coupling problem of the sink coupling frame 6 is improved, so as to improve the data quality of the instrument. The sink coupling frame 6 is adapted to 17-inch OBS, and in actual application, the parameters of the sink coupling frame 6 can be modified according to the size of the actual OBS. The material of the sink coupling frame 6 needs to be selected according to the bottoming time. The short-term use with a time less than three months can use iron material; the long-term use with a time greater than three months needs to use stainless steel material.

[0061] The fixed support panel 1 is adaptively connected with the sink coupling frame 6, and the fixed support panel 1 is also adapted to 17-inch OBS. The material for manufacturing the fixed support panel 1 needs to meet the conditions of zero buoyancy or positive buoyancy, and the conditions of hard material and strong strain resistance.

[0062] The installation steps of the subsea seismograph are as follows:

[0063] 1. Fix the mechanical release 2 on the fixed support panel 1;

[0064] 2. Fix the instrument cabin ball 3 and the battery cabin ball 4 on the fixed support panel 1 through the first through hole and the second through hole respectively;

[0065] 3. Pass the third through hole 21 of the unhooking sleeve 20 through the steel wire rope and connect the upper end of the mechanical release 2, and rotate the hook shaft 19 of the mechanical release 2 to be perpendicular to the unhooking sleeve 20. At this time, the unhooking sleeve 20 is connected with the mechanical release 2 through the hook shaft 19, and the two are in a fixed state;

[0066] 4. Pass one end of the fixed steel wire 13 through the pulley 10 on the sink coupling frame 6 and connect the sink coupling frame 6, and hang the other end of the fixed steel wire 13 on the rotating rod 23 of the electrochemical fuse release assembly, and adjust to a suitable degree of tightness by rotating the rotating rod 23;

[0067] 5. The battery compartment ball 4 is connected to the mechanical release 2 and is sealed from water ingress by a locking nut. The battery compartment ball 4, instrument compartment ball 3, fixed support faceplate 1 and sinker 6 form a unit.

[0068] All other embodiments that would be obvious to those of ordinary skill in the art based on the disclosure herein are intended to be within the scope of the present invention.

Claims

1. A dual release system for a seafloor seismometer comprising a mechanical release, characterized in that, The electrochemical fuse release assembly, at least two cabin balls, a fixed support panel, a sinking frame, a fixed steel wire and a disengaging sleeve are also included. The at least two cabin balls are arranged on the fixed support panel, the upper part of the cabin balls is provided with the electrochemical fuse release assembly, the upper part of the electrochemical fuse release assembly is provided with a rotating rod, and the at least two cabin balls include an instrument cabin ball and a battery cabin ball. The mechanical release is fixed on the fixed support panel and arranged beside the cabin balls, and the mechanical release is connected with the battery cabin ball through a cable. The sinking frame is connected below the fixed support panel, the sinking frame includes a base frame and a plurality of support columns extending upward from the base frame, pulleys are arranged between two of the support columns, one end of the fixed steel wire is connected with the disengaging sleeve, the other side of the fixed steel wire passes through the pulleys, penetrates through the fixed support panel and is sleeved with the rotating rod, and the at least two cabin balls, the fixed support panel and the sinking frame form an integral whole. The sinking frame includes six support columns, the base frame is in a square shape, six support columns are arranged at the four corners and the middle part of the base frame, respectively, pulley support plates are arranged transversely between two support columns arranged at the middle part, and the pulleys are arranged on the pulley support plates. The lower surface of the fixed support panel is provided with six limiting sleeve pipes matched with the support columns, and the six limiting sleeve pipes are sleeved with the six support columns one by one, respectively. Two through holes matched with the instrument cabin ball and the battery cabin ball are formed in the fixed support panel, and the instrument cabin ball and the battery cabin ball are arranged in the two through holes, respectively.

2. The dual release system of a bottom seismic sensor according to claim 1, characterized in that, The base frame is further provided with four extension rods, the four extension rods are arranged at the four corners of the base frame, respectively, and extend outward along the width direction of the base frame, and each extension rod is connected with a flow guide cylinder.

3. The dual release system of a bottom seismic sensor according to claim 1, characterized in that, The mechanical release includes a pressure-resistant cabin body, a power connector, a direct current motor, a motor rotating shaft, a fixed support plate and a hook shaft. The fixed support plate is horizontally arranged at the lower part of the outer wall of the pressure-resistant cabin body, and the upper surface of the fixed support plate is connected with the lower surface of the fixed support panel. The pressure-resistant cabin body is in a hollow cylindrical shape, the power connector and the direct current motor are arranged in the pressure-resistant cabin body, the power connector is connected with the upper part of the direct current motor, the motor rotating shaft of the direct current motor extends downward and out of the pressure-resistant cabin body and is connected with the hook shaft, and the motor rotating shaft and the hook shaft are coaxially arranged.

4. The dual release system of a bottom seismic sensor according to claim 3, characterized in that, The disengaging sleeve is in a hollow rectangular shape, a third through hole and a fourth through hole are formed in the same side of the disengaging sleeve. One end of the fixed steel wire penetrates through the third through hole and is connected with the disengaging sleeve, and the hook shaft penetrates through the fourth through hole and is connected with or separated from the disengaging sleeve. When the hook shaft is perpendicular or close to perpendicular to the disengaging sleeve, the disengaging sleeve is connected with the hook shaft, and when the hook shaft is parallel to the disengaging sleeve, the disengaging sleeve is separated from the hook shaft.

5. The dual release system of a bottom seismic sensor according to claim 1, wherein, The electrochemical fuse release assembly further comprises a transducer arranged on the upper portion of the electrochemical fuse release assembly.

6. The dual release system of a bottom seismic sensor according to claim 5, characterized in that, A control system is further included, which comprises a power module, a receiving module, a transmitting module and a release module, the power module is connected with the receiving module, the transmitting module and the release module respectively, and the receiving module is connected with the transmitting module and the release module respectively; The receiving module comprises a single-chip microcomputer and a frequency decoder connected with the single-chip microcomputer respectively, and the transmitting module is connected with the transducer and is used for controlling the transducer to transmit; The release module is connected with the mechanical releaser and the electrochemical fuse release assembly respectively, and is used for the release of the electrochemical fuse release assembly and the release of the mechanical releaser.

7. The dual release system of a bottom seismic sensor according to claim 6, characterized in that, The frequency decoder is used for sending release codes to the mechanical releaser and the electrochemical fuse release assembly, and the release codes are the same or different release codes.

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