Recyclable ocean underwater observation platform

Abstract

The invention belongs to the technical field of ocean monitoring devices, particularly discloses a recyclable ocean underwater observation platform, and effectively solves the problem that an underwater observation platform is difficult to apply on a large scale due to complex laying and recycling operation. Comprising a floating body, a pressure-resistant cabin, a bottom plate and a balancing weight, a rotatable rotating shaft is arranged on a bottom end cover of the pressure-resistant cabin, two rotating shaft pressing arms are symmetrically arranged on the rotating shaft, two rotating hanging plates are symmetrically arranged on the bottom plate and connected with the bottom plate through a pin shaft, the axis of the pin shaft is perpendicular to the axis of the rotating shaft, and each rotating hanging plate is divided into a long arm and a short arm with a pin shaft hole as the boundary; two Z-shaped balancing weight hooks are symmetrically arranged at the top end of the balancing weight, when the balancing weight is laid in seawater, the free ends of the balancing weight hooks are in lap joint with the short arm of the rotating hanging plate, and the rotating shaft pressing arm rotates to the position above the long arm of the rotating hanging plate; and during floating recovery, the rotating shaft rotates, and the limitation of the rotating shaft pressing arm on the rotating hanging plate is relieved, so that the balancing weight is separated from the bottom plate. The self-buoyancy can be automatically adjusted, and sinking and floating are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of ocean monitoring devices, and in particular relates to a recoverable ocean underwater observation platform. Background Art

[0002] Underwater observation platforms equipped with various measurement sensors are often used in marine research and observation to obtain seawater element data. Currently, two types of underwater observation platforms are commonly used. One type installs sensors in a pressure-resistant chamber and lowers them via a winch to obtain seawater element data at a specific depth or profile. Because these platforms require lowering and recovery from survey vessels, they can only be used to obtain seawater element data for a short period of time in a specific area. The other type uses multiple sets of sensors placed on underwater observation platforms such as buoys for long-term observation, acquiring seafloor or fixed-depth seawater element data. However, these types of underwater observation platforms are generally large and costly.

[0003] In addition, since the above two underwater observation platforms have significant differences in structure and function, they are only suitable for their respective occasions and require a lot of ship time for deployment and recovery. Summary of the Invention

[0004] The purpose of the present invention is to provide a recoverable ocean underwater observation platform to effectively solve the problem that existing underwater observation platforms are difficult to apply on a large scale in ocean research due to their high cost and complex deployment and recovery operations.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a recyclable ocean underwater observation platform, including a truncated cone-shaped float, a cylindrical pressure-resistant cabin, a square porous bottom plate and a cylindrical counterweight block. A positioning hole for positioning and placing the pressure-resistant cabin is provided in the center of the float, the pressure-resistant cabin is arranged in the positioning hole, and the bottom plate is arranged at the bottom end of the float.

[0006] The pressure-resistant cabin includes a cabin body, a top end cover and a bottom end cover. A rotatable shaft is passed through the center of the bottom end cover, and two shaft pressure arms are symmetrically provided on the shaft below the bottom end cover.

[0007] Two square holes are provided on the base plate, and the two square holes are symmetrically arranged relative to the axis of the rotating shaft. A rotating hanging plate is provided in each square hole. The rotating hanging plate is connected to the base plate through a pin shaft, and the axis of the pin shaft is perpendicular to the axis of the rotating shaft. The pin shaft hole on the rotating hanging plate divides the rotating hanging plate into a long arm part and a short arm part, and the length ratio of the long arm part to the short arm part is 3:2.

[0008] Two "Z"-shaped counterweight hooks are symmetrically provided on the top of the counterweight block. When deployed in seawater, the free ends of the counterweight hooks pass through the square hole and overlap on the short arm part of the rotating hanging plate, and the rotating shaft pressure arm rotates to the top of the long arm part of the rotating hanging plate to limit the rotation of the rotating hanging plate; when floating up for recovery, the rotating shaft rotates to release the rotation restriction of the rotating hanging plate by the rotating shaft pressure arm. Under the pull of positive buoyancy and the gravity of the counterweight block, the short arm part of the rotating hanging plate rotates downward, thereby separating the counterweight block from the bottom plate.

[0009] Furthermore, a fork arm is provided at the bottom end of the rotating shaft, a swing arm pin is provided in the middle of the fork arm, a swing arm limiting column is provided at the bottom end of the fork arm, a torsion spring and a swing arm that can rotate around the swing arm pin are installed on the swing arm pin, and the two ends of the torsion spring are respectively fixed on the root of the fork arm and the swing arm. In the initial pre-tightened position of the torsion spring, the swing arm droops and is close to the swing arm limiting column.

[0010] A drum is provided at the center of the counterweight block, a cable is wound on the drum, one end of the cable is fixed on the drum, and the other end is fastened with a circular cable buckle, the cable buckle is sleeved on the swing arm, and the swing arm is provided with a cable buckle limiting column for limiting the cable buckle.

[0011] An open circular hole is provided at the center of the bottom plate. The open circular hole has an opening, and the direction of the opening is parallel to the axis of the pin shaft hole.

[0012] When deployed in seawater, the swing arm is in the opposite direction of the opening of the open circular hole. At this time, the swing arm is rotated toward the upper direction of the bottom plate so that the front end of the swing arm passes through the open circular hole and presses against the bottom plate; when suspended, the rotating shaft rotates 90° counterclockwise, and the counterweight block is separated from the bottom plate. At this time, the counterweight block is connected to the floating body part by a cable; when floating up for recovery, the rotating shaft continues to rotate 90° counterclockwise, and at this time the swing arm rotates to the opening position of the open circular hole. The swing arm droops under the action of the torque of the torsion spring and the tension of the cable, the cable buckle slips off the swing arm, and the floating body part is disconnected from the counterweight block.

[0013] Furthermore, a thrust bearing is connected to the upper part of the rotating shaft, and the thrust bearing includes an inner ring and an outer ring. The inner ring of the thrust bearing is sequentially sleeved with a sleeve, a driven gear and a rotating shaft end retaining ring from bottom to top. The bottom of the inner ring of the thrust bearing abuts against the shoulder of the rotating shaft. A bearing cover for limiting the rotation of the outer ring of the thrust bearing is provided above the outer ring of the thrust bearing, and the bearing cover is bolted to the bottom end cover of the pressure cabin.

[0014] A DC reduction motor is fixed to the upper surface of the bottom end cover, and an output shaft of the DC reduction motor is connected to a driving gear, which is meshed with a driven gear.

[0015] Furthermore, the free end of the rotating shaft pressing arm is folded downward by 90 degrees to form a pressing portion.

[0016] Furthermore, a truncated cone-shaped float bracket is embedded in the float, and the bottom plate is bolted to the bottom end of the float bracket.

[0017] Furthermore, a groove is provided at the bottom of the counterweight block along the axial direction of the counterweight block, a safety hook is provided in the groove, and both ends of the safety hook are connected to the bottom plate.

[0018] Furthermore, two safety hook hanging holes are provided on the bottom plate, and the safety hook hanging holes are connected to the ends of the safety hooks.

[0019] Furthermore, a limit block is provided on the upper and lower surfaces of the bottom plate at the installation position of each rotating hanging plate, which is used to limit the rotation angle of the long arm part of the rotating hanging plate to between 0° and 95°.

[0020] Furthermore, a sealing ring is provided on the rotating shaft, and the sealing ring is provided below the shaft shoulder of the rotating shaft.

[0021] Furthermore, the diameter of the bottom of the positioning through hole is smaller than the diameter of the bottom end of the pressure cabin.

[0022] Compared with existing technologies, the present invention offers the following beneficial technical effects: The underwater observation platform provided by the present invention can automatically adjust its buoyancy to achieve sinking and surfacing, effectively resolving the current challenges of underwater observation platforms, such as high costs and complex deployment and recovery operations, which hinder their large-scale application. The present invention not only enables medium- and long-term monitoring of seawater elements at a fixed depth (suspended) in the ocean, but also collects seawater profile data during surfacing and sinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the ocean underwater observation platform in Example 1.

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure after hiding the floating body.

[0025] Figure 3 yes Figure 1 Schematic diagram of the combined structure of the midsole plate, bottom end cover and counterweight block.

[0026] Figure 4 yes Figure 1 Schematic diagram of a partial cross-section of the rotating shaft assembly.

[0027] Figure 5 yes Figure 1 Schematic diagram of the combined structure of the central rotating hanging plate, the shaft pressure arm and the counterweight hook.

[0028] Figure 6 yes Figure 1 Schematic diagram of the center counterweight mounting.

[0029] Figure 7 It is a structural diagram of the ocean underwater observation platform in Example 2.

[0030] Figure 8 yes Figure 7 Schematic diagram of the transfer shaft structure.

[0031] Figure 9 yes Figure 7 Schematic diagram of the partial structure of the rotating shaft and base plate.

[0032] Figure 10 yes Figure 7 Schematic diagram of the coordination structure of the middle drum and the swing arm.

[0033] Figure 11 It is a circuit principle block diagram of the present invention.

[0034] Explanation of the reference numerals: Floating body 1; bottom plate 2; counterweight 3; floating body bracket 4; rotating shaft 5; rotating hanging plate 6; pin 7; limit block 8; cabin 9; top cover 10; bottom cover 11; pressure sensor 12; satellite positioning communication antenna 13; rotating shaft pressure arm 14; crimping part 15; outer ring 16; sleeve 17; driven gear 18; rotating shaft end retaining ring 19; bearing cover 20; sealing ring 21; DC reduction motor 22; motor bracket 23; driving gear 24; counterweight hook 25; safety hook 26; safety hook hanging hole 27; fork arm 28; swing arm pin 29; swing arm limit column 30; torsion spring 31; swing arm 32; reel 33; cable buckle 34; opening circular hole 35, cable buckle limit column 36. DETAILED DESCRIPTION

[0035] Example 1: A recyclable underwater ocean observation platform, which is in the shape of a truncated cone. Its center of gravity is located at the bottom and is lower than the center of buoyancy, which is conducive to maintaining a vertical posture in the water and reducing the resistance of seawater when floating. Figure 1 and Figure 2 As shown, the ocean underwater observation platform of this embodiment includes a truncated cone-shaped float 1, a cylindrical pressure-resistant cabin, a square porous bottom plate 2 and a cylindrical counterweight 3. In this embodiment, the centers of the float 1, the pressure-resistant cabin, the bottom plate 2 and the counterweight 3 are all on a straight line.

[0036] The float 1 provides the main buoyancy for the entire ocean underwater observation platform. The float 1 is made of solid buoyancy material. A positioning hole is provided in the center of the float 1 for positioning and placing the pressure cabin. At the same time, a truncated cone-shaped float bracket 4 is embedded in the float 1. The float bracket 4 facilitates the positioning of the pressure cabin and the fastening connection of the bottom plate 2. The pressure cabin is provided in the positioning hole. The diameter of the bottom of the positioning hole is smaller than the diameter of the bottom end of the pressure cabin, so that the pressure cabin can be supported. The bottom plate 2 is provided at the bottom end of the float 1. The width of the bottom plate 2 is smaller than the diameter of the bottom end face of the float 1, but larger than the diameter of the positioning hole. The bottom plate 2 is bolted to the bottom end of the float bracket 4.

[0037] like Figure 3 As shown, the bottom plate 2 has a porous structure, which facilitates the flow of seawater when the ocean underwater observation platform floats up and down, thereby reducing resistance. Two square holes are provided on the bottom plate 2, and the two square holes are symmetrically arranged relative to the axis of the rotating shaft 5. Each square hole is provided with a rotating hanging plate 6. The rotating hanging plate 6 is connected to the bottom plate 2 by a pin 7. The axis of the pin 7 is perpendicular to the axis of the rotating shaft 5, and the rotating hanging plate 6 can rotate around the pin 7. The pin hole on the rotating hanging plate 6 divides the rotating hanging plate 6 into a long arm portion and a short arm portion. The length ratio of the long arm portion to the short arm portion is 3:2. In other words, the rotating hanging plate 6 is a long-short arm lever structure, with the pin hole as the fulcrum, and the short arm portion can tilt toward the bottom of the bottom plate 2. A limit block 8 is provided on the upper and lower surfaces of the bottom plate 2 at the installation position of each rotating hanging plate 6 to limit the rotation angle of the long arm portion of the rotating hanging plate 6 to between 0° and 95°.

[0038] like Figure 2 As shown, the pressure chamber consists of a cylindrical chamber 9, a top cover 10, and a bottom cover 11. It provides a sealed and pressure-resistant environment for various sensors, circuit boards, batteries, satellite positioning and communication modules, microprocessors, data acquisition and processing circuits, real-time clocks, data storage devices, motor drivers, etc. carried by the ocean underwater observation platform. The top cover 10 is equipped with pressure sensors 12, satellite positioning and communication antennas 13, and other sensor components that need to be exposed to seawater. Figure 11 As shown, the satellite positioning communication module, real-time clock, data acquisition and processing circuit, data storage, and motor driver are all connected to the microprocessor. The sensor assembly is connected to the data acquisition and processing circuit, and the satellite positioning communication antenna is connected to the satellite positioning communication module. A rotating shaft 5 is provided through the center of the bottom cover 11, with both ends of the rotating shaft 5 extending out of the bottom cover 11. In this embodiment, a stepped through-hole is provided in the center of the bottom cover 11 for the installation of the rotating shaft 5. The upper portion of the stepped through-hole has a larger diameter than the lower portion.

[0039] like Figure 4As shown, two shaft pressure arms 14 are symmetrically disposed on the shaft 5 below the bottom end cap 11. In this embodiment, the shaft pressure arms 14 are approximately fan-shaped, with the free ends of the shaft pressure arms 14 folded downward 90° to form a pressure-connecting portion 15. When deployed in seawater, the pressure-connecting portion 15 of the shaft pressure arms 14 is located above the long arm portion of the rotating clasp 6, restricting the rotation of the rotating clasp 6. Because the short arm portion of the rotating clasp 6 is subjected to the downward force of the counterweight 3, an upward force is exerted on the long arm portion, causing the long arm portion to come into close contact with the pressure-connecting portion 15 of the shaft pressure arms 14.

[0040] A thrust bearing is connected to the upper portion of the rotating shaft 5. This thrust bearing comprises an inner ring and an outer ring 16. The inner ring of the thrust bearing is fitted with a sleeve 17, a driven gear 18, and a shaft end retaining ring 19, sequentially arranged from bottom to top. The bottom of the thrust bearing's inner ring abuts the shoulder of the rotating shaft 5. The shaft end retaining ring 19 is bolted to the rotating shaft 5, and its lower surface contacts the driven gear 18. The thrust bearing's outer ring 16 is located above the stepped through-hole. A bearing cap 20 is located above the thrust bearing's outer ring 16 to limit its rotation. The bearing cap 20 is bolted to the bottom end cover 11 of the pressure cabin, providing axial load support. The rotating shaft 5 is provided with two O-ring grooves, one above the other, each containing a sealing ring 21. The grooves are located below the shoulder of the rotating shaft 5. The O-ring groove, the radially mounted sealing ring 21 and the inner wall of the stepped through hole of the bottom end cover 11 form a dynamic sealing structure, which keeps the pressure cabin watertight when the shaft 5 is stationary or rotating.

[0041] like Figure 3 As shown, a DC reduction motor 22 is fixed to the upper surface of the bottom end cover 11. The DC reduction motor 22 is connected to the motor driver. In this embodiment, the DC reduction motor 22 is fixed to the bottom end cover 11 via a motor bracket 23. The output shaft of the DC reduction motor 22 is connected to a driving gear 24, which meshes with the driven gear 18 to provide a reduction transmission. The driving gear 24 is positioned by the shoulder of the output shaft and the output shaft end retaining ring. The DC reduction motor 22 is preferably a right-angle reducer with a worm gear drive. If a conventional gear reducer is selected, the drive of the driving and driven gears 18 can be changed to a worm and worm gear drive to ensure self-locking.

[0042] like Figure 1 、 Figure 3 、 Figure 5 and Figure 6As shown, two "Z"-shaped counterweight hooks 25 are symmetrically provided on the top of the counterweight 3, and the counterweight hooks 25 are fastened to the counterweight 3 by screws. When the marine underwater observation platform is deployed in seawater, the free end of the counterweight hook 25 is passed through the square hole on the base plate 2 and overlapped on the short arm part of the rotating hanging plate 6. After hanging, the gap between the counterweight hook 25 and the square hole is small, which can limit the rotation and movement of the counterweight hook 25. At the same time, the shaft pressure arm 14 rotates to the top of the long arm part of the rotating hanging plate 6 to limit the rotation of the rotating hanging plate 6. When floating up to recover the marine underwater observation platform, the DC reduction motor 22 drives the shaft 5 to rotate, releasing the rotation restriction of the shaft pressure arm 14 on the rotating hanging plate 6. Under the pull of positive buoyancy and the gravity of the counterweight 3, the short arm part of the rotating hanging plate 6 rotates downward, thereby separating the counterweight 3 from the base plate 2.

[0043] The bottom of the counterweight 3 has a groove along its axis, within which a safety hook 26 is mounted. Both ends of the safety hook 26 are connected to the base plate 2. In this embodiment, the base plate 2 is provided with two safety hook holes 27, which connect to the ends of the safety hooks 26. The safety hooks 26 secure the relative position of the rotating hanging plate 6 and the counterweight hook 25 when the counterweight 3 is mounted. They also prevent the counterweight 3 from detaching from the base plate 2 due to accidental collisions during transportation.

[0044] In this embodiment, the outer dimensions of the float 1 are approximately: an upper base diameter of 260mm, a lower base diameter of 600mm, and a height of 350mm. It is made of solid buoyancy material and can provide the observation platform with a positive buoyancy of approximately 160N. The counterweight 3 has a diameter of approximately 400mm and weighs approximately 20kg, and can provide the ocean underwater observation platform with a negative buoyancy of approximately 170N. After the counterweight 3 is mounted and the pressure cabin is equipped with additional loads such as batteries and sensors weighing approximately 5kg, the total weight of the ocean underwater observation platform is approximately 55kg, and the buoyancy in seawater is approximately -110N, causing the ocean underwater observation platform to continuously sink after being deployed in the seawater.

[0045] Before deploying at sea, this embodiment first rotates the short arms of the two rotating claspers 6 downward, then inserts the counterweight 3, equipped with the counterweight hook 25, through the square hole of the base plate 2. The rotating claspers 6 are then reversed to a horizontal position, and the free ends of the counterweight hooks 25 are overlapped on the short arms of the rotating claspers 6, thereby placing the base plate 2 on the counterweight 3. Next, the safety hooks 26 are installed, inserted into the grooves at the bottom of the counterweight 3, and the ends of the safety hooks 26 are inserted into the safety hook holes 27 on the base plate 2, completing the mounting of the counterweight 3. Finally, the position of the rotating shaft 5 is adjusted so that the rotating shaft pressure arms 14 on the rotating shaft 5 are directly above the long arms of the rotating claspers 6. Finally, use bolts to fasten the base plate 2 to the float bracket 4. There is a pad at the bolt installation position of the base plate 2 to ensure the gap between the base plate 2 and the float bracket 4, so that the crimping part 15 of the rotating shaft pressure arm 14 is pressed on the long arm part of the rotating hanging plate 6, limiting the rotation of the rotating hanging plate 6 while allowing the rotating shaft pressure arm 14 to rotate along the surface of the base plate 2.

[0046] When deployed at sea, the platform's operating parameters are configured, including preset sampling intervals, sleep mode, and surfacing time. Safety hook 26 is removed. The platform is then lowered into the water. Under the influence of negative buoyancy, it continuously descends, collecting seawater profile data. Upon reaching the seabed, the platform remains seated. Based on the configured operating parameters, the platform's onboard sensor components, under microprocessor control, collect seawater data at specified sampling intervals or enter a low-power sleep mode.

[0047] The microprocessor periodically reads the time data from the real-time clock. When the preset buoyancy time is reached, the microprocessor controls the motor driver to drive the DC reduction motor 22 to operate, causing the rotating shaft 5 to rotate counterclockwise, thereby releasing the rotation restriction of the rotating shaft pressure arm 14 on the rotating hanging plate 6. After the counterweight 3 is removed, the remaining part of the marine underwater observation platform has a positive buoyancy of approximately 60N. Under the pull of the positive buoyancy and the force generated by the weight of the counterweight 3 itself, the short arm portion of the rotating hanging plate 6 rotates downward, causing the counterweight hook 25 to separate from the short arm portion of the rotating hanging plate 6, thereby detaching the counterweight 3 from the base plate 2. At this time, the marine underwater observation platform is separated into the counterweight 3 and the floating body. The floating body floats up under the action of positive buoyancy, and at the same time, it can collect seawater element data and profile data. When it reaches the sea surface, the satellite positioning communication module is activated to transmit the underwater measurement data stored in the data storage device and its own position and status information.

[0048] If the underwater observation platform needs to be recovered, the vessel can be guided by satellite positioning information to its location and retrieve it. Otherwise, the platform can continue to collect and transmit surface water feature information until its battery runs out. Alternatively, a self-destruct mechanism can be pre-installed on the platform and controlled via satellite communications.

[0049] Example 2: Based on Example 1, this example adds the following technical features, so that this example can be moored and floated at a set depth.

[0050] like Figure 8 As shown, a fork arm 28 is provided at the bottom end of the rotating shaft 5. A swing arm pin 29 is provided in the middle of the fork arm 28. A swing arm stop 30 is provided at the bottom end of the fork arm 28. A torsion spring 31 and a swing arm 32 that can rotate about the swing arm pin 29 are mounted on the swing arm pin 29. The ends of the torsion spring 31 are respectively fixed to the base of the fork arm 28 and the swing arm 32. In the initial preloaded position of the torsion spring 31, the swing arm 32 hangs down and abuts against the swing arm stop 30. When the swing arm 32 rotates clockwise, it causes the torsion spring 31 to twist, generating torque. The torsion spring 31 is made of corrosion-resistant stainless steel wire.

[0051] like Figure 7 and Figure 10 As shown, a freely rotatable drum 33 is provided at the center of the counterweight 3. A cable made of Kevlar or ultra-high molecular weight polyethylene is evenly wound around the drum 33. One end of the cable is fixed to the drum 33, and the other end is fastened to a circular cable buckle 34, which is sleeved on the swing arm 32. By pre-adjusting the length of the cable, the suspension position of the ocean underwater observation platform is determined. Figure 8 As shown, due to the constant rotation and swinging of the cable caused by ocean currents, a cable lock stopper 36 is provided on the swing arm 32 in this embodiment to prevent the cable lock 34 from sliding to the bottom end of the swing arm 32 and interfering with the torsion spring 31, which could cause a release failure. Once installed, the cable lock 34 can only slide along the swing arm 32 between the sidewall of the opening 35 and the cable lock stopper 36 due to the restriction of the cable lock stopper 36.

[0052] like Figure 9 As shown, an open circular hole 35 is provided at the center of the bottom plate 2 . The open circular hole 35 has an opening, and the direction of the opening is parallel to the axis of the pin shaft hole on the rotating hanging plate 6 .

[0053] In this embodiment, in order to increase the reliability of operation, a micro switch is installed below the driven gear 18 to monitor the rotation angle of the rotating shaft 5 and avoid malfunction. The micro switch is connected to the microprocessor.

[0054] Before deploying this embodiment at sea, the short arms of the two rotating clasps 6 are first rotated downward, and the counterweight 3, equipped with the counterweight hook 25, is then inserted through the square hole of the base plate 2. At this point, the swing arm 32 is rotated upward, allowing the front end of the swing arm 32 to pass through the open circular hole 35 and rest against the base plate 2. The cable clip 34 is then placed on the front of the swing arm 32. Then, the rotating plate 6 is reversed to a horizontal position, and the free end of the counterweight hook 25 is overlapped on the short arm portion of the rotating plate 6, thereby placing the base plate 2 on the counterweight 3. Next, the safety hook 26 is installed. The safety hook 26 is embedded in the groove at the bottom of the counterweight 3, and the end of the safety hook 26 is inserted into the safety hook hole 27 on the base plate 2, completing the mounting of the counterweight 3. Finally, the position of the rotating shaft 5 is adjusted so that the rotating shaft pressure arm 14 on the rotating shaft 5 is directly above the long arm portion of the rotating plate 6, and the swing arm 32 on the fork arm 28 is opened in the opposite direction to the opening circular hole 35 of the base plate 2. Finally, the base plate 2 is fastened to the floating support 4 with bolts. The bolt mounting position of the base plate 2 is provided with a pad to ensure the gap between the base plate 2 and the floating support 4, so that the pressure portion 15 of the rotating shaft pressure arm 14 presses on the long arm portion of the rotating plate 6, restricting the rotation of the rotating plate 6 while allowing the rotating shaft pressure arm 14 to rotate along the surface of the base plate 2.

[0055] When deployed at sea, the platform's operating parameters are configured, including preset sampling intervals, sleep modes, and surfacing times. Safety hook 26 is removed. The platform is then lowered into the water. Under the influence of negative buoyancy, it continuously sinks, collecting seawater profile data.

[0056] This embodiment can preset two working modes: bottom sitting and suspension. (1) If the bottom sitting mode is preset, the ocean underwater observation platform will maintain the bottom sitting posture after reaching the seabed. According to the configured operating parameters, the sensor components carried by the ocean underwater observation platform collect seawater element data at a certain sampling interval under the control of the microprocessor, or enter low-power sleep mode. The microprocessor regularly reads the time data of the real-time clock. When the preset state switching time is reached, the ocean underwater observation platform switches to suspension mode. The microprocessor controls the motor driver to drive the DC reduction motor 22 to operate, driving the rotating shaft 5 to rotate 90° counterclockwise, releasing the rotation restriction of the rotating shaft pressure arm 14 on the rotating hanging plate 6. Under the pull of the positive buoyancy and the gravity of the counterweight block 3, the short arm part of the rotating hanging plate 6 rotates downward, thereby separating the counterweight block 3 from the bottom plate 2. At this time, the counterweight block 3 and the floating body are connected by a cable. At the same time, during the floating body part, the cable drives the reel 33 to rotate, continuously releasing the cable. After the cable is released, the floating part is pulled onto the counterweight 3, so that the floating part is in a moored floating state. According to the configured operating parameters, the sensor components carried by the marine underwater observation platform collect seawater element data at a certain sampling interval under the control of the microprocessor. (2) If the suspension mode is preset, during the sinking process of the marine underwater observation platform, the microprocessor controls the motor driver to drive the DC reduction motor 22 to operate, driving the rotating shaft 5 to rotate 90° counterclockwise, releasing the rotation restriction of the rotating shaft pressure arm 14 on the rotating hanging plate 6. Under the pull of the positive buoyancy and the gravity of the counterweight 3, the short arm part of the rotating hanging plate 6 rotates downward, thereby separating the counterweight 3 from the bottom plate 2. The counterweight 3 is connected to the floating part by a cable. Under the action of its own negative buoyancy, the counterweight 3 continues to sink. Pulled by the positive buoyancy of the float and the negative buoyancy of the counterweight 3, the cable is continuously released until it is fully released, and the counterweight 3 sinks to the seafloor, pulling the float onto it and placing it in a tethered floating state. Based on the configured operating parameters, the sensor components onboard the ocean underwater observation platform, under microprocessor control, collect seawater element data at regular sampling intervals.

[0057] The microprocessor periodically reads the real-time clock's time. When the preset buoyancy time is reached, the microprocessor controls the motor driver to operate the DC reduction motor 22, driving the rotating shaft 5 to rotate another 90° counterclockwise. At this point, the swing arm 32 rotates to the open position of the opening hole 35. Under the torque of the torsion spring 31 and the tension of the cable, the swing arm 32 droops, and the cable clip 34 slips off the swing arm 32, disconnecting the float from the counterweight 3. As the float rises under the positive buoyancy, it simultaneously collects seawater element data and profile data. Upon reaching the sea surface, the satellite positioning communication module is activated to transmit underwater measurement data stored in the data memory, as well as its own position and status information.

[0058] If the underwater observation platform needs to be recovered, the vessel can be guided by satellite positioning information to its location and retrieve it. Otherwise, the platform can continue to collect and transmit surface water feature information until its battery runs out. Alternatively, a self-destruct mechanism can be pre-installed on the platform and controlled via satellite communications.

[0059] The invention not only enables medium- and long-term monitoring of seawater elements at a fixed depth, but also collects seawater profile data during surfacing and sinking. After surfacing, the device transmits measurement data and its own position information via satellite communication for recovery by a vessel.

[0060] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A recyclable ocean underwater observation platform, characterized in that: The floating structure comprises a truncated cone-shaped floating body, a cylindrical pressure-resistant cabin, a square porous bottom plate and a cylindrical counterweight. The center of the floating body is provided with a positioning hole for positioning and placing the pressure-resistant cabin. The pressure-resistant cabin is arranged in the positioning hole. The bottom plate is arranged at the bottom end of the floating body. The pressure-resistant cabin includes a cabin body, a top cover and a bottom cover. A rotatable shaft is provided at the center of the bottom cover. Two shaft pressure arms are symmetrically provided on the shaft below the bottom cover. The bottom plate is provided with two square holes, which are symmetrically arranged with respect to the axis of the rotating shaft. A rotating hanging plate is provided in each of the square holes. The rotating hanging plate is connected to the bottom plate by a pin, and the axis of the pin is perpendicular to the axis of the rotating shaft. The pin holes on the rotating hanging plate divide the rotating hanging plate into a long arm part and a short arm part, and the length ratio of the long arm part to the short arm part is 3:2; Two "Z"-shaped counterweight hooks are symmetrically provided on the top of the counterweight block. When deployed in seawater, the free ends of the counterweight hooks pass through the square hole and overlap on the short arm part of the rotating hanging plate, and the rotating shaft pressure arm rotates to the top of the long arm part of the rotating hanging plate to limit the rotation of the rotating hanging plate; when floating up for recovery, the rotating shaft rotates to release the rotation restriction of the rotating hanging plate by the rotating shaft pressure arm. Under the pull of positive buoyancy and the gravity of the counterweight block, the short arm part of the rotating hanging plate rotates downward, thereby separating the counterweight block from the bottom plate.

2. The recoverable underwater ocean observation platform according to claim 1, characterized in that: A fork arm is provided at the bottom end of the rotating shaft, a swing arm pin is provided in the middle of the fork arm, a swing arm limiting column is provided at the bottom end of the fork arm, a torsion spring and a swing arm capable of rotating around the swing arm pin are installed on the swing arm pin, and two ends of the torsion spring are respectively fixed to the root of the fork arm and the swing arm. In the initial pre-tightened position of the torsion spring, the swing arm hangs down and is closely against the swing arm limiting column. A drum is provided at the center of the counterweight block, a cable is wound on the drum, one end of the cable is fixed to the drum, and the other end is fastened with a circular cable buckle, the cable buckle is sleeved on the swing arm, and the swing arm is provided with a cable buckle limiting column for limiting the cable buckle; An open circular hole is provided at the center of the bottom plate, and the open circular hole has an opening, and the direction of the opening is parallel to the axis of the pin shaft hole; When deployed in seawater, the swing arm is in the opposite direction of the opening of the open circular hole. At this time, the swing arm is rotated toward the upper direction of the bottom plate so that the front end of the swing arm passes through the open circular hole and presses against the bottom plate; when suspended, the rotating shaft rotates 90° counterclockwise, and the counterweight block is separated from the bottom plate. At this time, the counterweight block is connected to the floating body part by a cable; when floating up for recovery, the rotating shaft continues to rotate 90° counterclockwise, and at this time the swing arm rotates to the opening position of the open circular hole. The swing arm droops under the action of the torque of the torsion spring and the tension of the cable, the cable buckle slips off the swing arm, and the floating body part is disconnected from the counterweight block.

3. The recoverable underwater ocean observation platform according to claim 2, characterized in that: A thrust bearing is connected to the upper portion of the rotating shaft. The thrust bearing includes an inner ring and an outer ring. The inner ring of the thrust bearing is sleeved with a sleeve, a driven gear, and a shaft end retaining ring in sequence from bottom to top. The bottom of the inner ring of the thrust bearing abuts against the shoulder of the rotating shaft. A bearing cover is provided above the outer ring of the thrust bearing for limiting the rotation of the outer ring of the thrust bearing. The bearing cover is bolted to the bottom end cover of the pressure cabin. A DC reduction motor is fixed to the upper surface of the bottom end cover, and an output shaft of the DC reduction motor is connected to a driving gear, which is meshed with a driven gear.

4. The recoverable underwater ocean observation platform according to claim 3, characterized in that: The free end of the rotating shaft pressing arm is folded downward by 90 degrees to form a pressing portion.

5. The recoverable underwater ocean observation platform according to claim 4, characterized in that: A truncated cone-shaped float bracket is embedded in the float, and the bottom plate is connected to the bottom end of the float bracket by bolts.

6. The recoverable underwater ocean observation platform according to claim 5, characterized in that: The bottom of the counterweight block is provided with a groove along the axial direction of the counterweight block, a safety hook is provided in the groove, and both ends of the safety hook are connected to the bottom plate.

7. The recoverable underwater ocean observation platform according to claim 6, characterized in that: Two safety hook hanging holes are provided on the bottom plate, and the safety hook hanging holes are connected to the ends of the safety hooks.

8. The recoverable underwater ocean observation platform according to claim 7, characterized in that: A limit block for limiting the rotation angle of the long arm portion of the rotating hanging plate to between 0° and 95° is provided on the upper and lower surfaces of the bottom plate at the installation position of each rotating hanging plate.

9. The recoverable underwater ocean observation platform according to claim 8, characterized in that: A sealing ring is provided on the rotating shaft, and the sealing ring is arranged below the shaft shoulder of the rotating shaft.

10. The recoverable underwater ocean observation platform according to claim 9, characterized in that: The diameter of the bottom of the positioning through hole is smaller than the diameter of the bottom end of the pressure cabin.

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