Arrangement, maintenance and recovery method for observation station of seabed-based system

Abstract

The invention belongs to the technical field of ocean engineering, and discloses an arrangement, maintenance and recovery method of a seabed-based system observation station. The method aims at providing an efficient, stable and safe solution for long-term marine environment condition monitoring of a submarine cable key routing section so as to realize real-time monitoring and data acquisition of marine hydrological parameters. The method comprises the following steps: firstly, selecting a proper observation station point according to marine hydrological monitoring requirements, transporting a seabed base system to a specified position by adopting a ship anchoring operation mode, and laying the system to the seabed by adopting a manual equipment tying and laying mode; maintenance operation is carried out about 90 days after equipment laying is completed, controllable release and rapid positioning of a floating body are achieved through an acoustic releaser and a Beidou beacon machine, cleaning and maintenance of a sensor and the floating body are carried out, and observation data are exported; and finally, recycling operation is carried out 365 days after equipment laying is completed, the floating body platform is remotely released through an acoustic releaser, and the floating body platform is positioned and recycled through a Beidou beacon machine.

Description

Technical Field

[0001] The present invention belongs to the technical field of ocean engineering and relates to a method for arranging, maintaining, and recovering a seabed-based system observation station for key routing sections of submarine cables. Background Art

[0002] With the continuous advancement of ocean resource development and ocean engineering, the importance of ocean hydrological monitoring in ensuring the safety of ocean infrastructure, optimizing ocean engineering construction, and protecting the ocean ecological environment has become increasingly prominent. In particular, submarine cables, as key infrastructure connecting land and sea, their stability is not only related to the stable transmission of electricity and communication, but also directly affects the efficiency and safety of ocean resource development. However, the ocean environment where submarine cables are located is complex and changeable, affected by various factors such as waves, ocean currents, tides, and sediment movement. The long-term action of these factors may lead to the damage or performance degradation of submarine cables.

[0003] Traditional ocean hydrological monitoring methods mainly rely on short-term observations or buoy-type monitoring equipment. Although these methods can provide ocean environment information to a certain extent, they have obvious deficiencies in data continuity, monitoring accuracy, and anti-interference ability. In addition, traditional monitoring equipment faces many challenges in the long-term deployment and maintenance process, such as difficult equipment layout, long maintenance cycle, low recovery efficiency, etc., and it is difficult to meet the requirements of modern ocean engineering for high-precision and long-term monitoring.

[0004] Based on the lack of a method in the prior art that can arrange, maintain, and recover the seabed-based system efficiently, stably, and safely. Therefore, the present invention proposes a method for arranging, maintaining, and recovering a seabed-based system observation station, aiming to solve the deficiencies in the prior art, improve the efficiency of ocean hydrological monitoring and data quality, and provide strong technical support for the safe operation of ocean infrastructure such as submarine cables. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for arranging, maintaining, and recovering a seabed-based system observation station to solve the problems of difficult layout of ocean hydrological monitoring equipment, low maintenance efficiency, and insufficient recovery safety in the prior art. The present invention realizes efficient, stable, and safe monitoring of the ocean environmental conditions in the key routing sections of submarine cables by optimizing the layout process, maintenance cycle, and recovery method of the seabed-based system.

[0006] The technical solution of the present invention:

[0007] A method for arranging, maintaining, and recovering a seabed-based system observation station, the steps are as follows:

[0008] Step A: According to the requirements of ocean hydrological monitoring, set up long-term and short-term hydrological observation sites. Adopt the ship mooring operation method, transport the seabed-based system to the designated location according to the depth of the hydrological monitoring measurement point, and deploy the seabed-based system to the seabed by means of manual mooring equipment.

[0009] Among them, the seabed-based system includes a base, a floating platform, an acoustic release, a monitoring sensor, and a Beidou beacon. The base is used to stably support the seabed-based system. The floating platform provides buoyancy and carries the monitoring sensor. The acoustic release is used to achieve the controllable release of the floating platform, and the Beidou beacon is used for position positioning after the floating body floats.

[0010] Step B: After 90 days of deploying the seabed-based system, carry out the maintenance operation of the seabed-based system. Through the coordinated use of the acoustic release and the Beidou beacon, achieve the controllable release and rapid positioning of the floating platform, clean and maintain the monitoring sensor and the floating platform, and export the observation data of the monitoring sensor.

[0011] Step C: After 365 days of deploying the seabed-based system, carry out the recovery operation of the seabed-based system. After the ship is in place, remotely release the floating platform through the acoustic release, and use the Beidou beacon to position and recover the floating platform.

[0012] Advantages of the present invention: The innovation of the present invention lies in the combination of ship mooring operation, acoustic release technology, and Beidou positioning system, which is applied to the layout, maintenance, and recovery of seabed-based system observation stations. This method makes full use of the controllable release characteristics of the acoustic release and the precise positioning ability of the Beidou beacon, effectively improving the accuracy of equipment layout, the convenience of maintenance, and the safety of recovery, providing strong technical support for realizing the efficiency of ocean hydrological monitoring and the continuity of data collection, and having broad application prospects and important engineering value. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the layout of a short-term hydrological observation station.

[0014] Figure 2 It is a bottom view of the seabed-based system.

[0015] Figure 3 It is a top view of the seabed-based system.

[0016] In the figure: 1 counterweight; 2 turbidimeter; wave and current meter; 4 battery compartment; 5 acoustic release; 6 floating platform; 7 Beidou beacon; 8 lifting ring; 9 acoustic protection cover. Detailed Embodiments

[0017] The following further illustrates the detailed embodiments of the present invention in combination with the drawings and technical solutions.

[0018] According to the requirements of marine hydrological monitoring, long-term and short-term observation sites are set. The positions of long-term hydrological monitoring points are as follows Figure 1 shown, mainly including surface operation vessels; acoustic Doppler current profilers for measuring flow velocity and direction; turbidity meters for measuring suspended sediment concentration. The schematic diagram of the short-term hydrological monitoring station is as shown in Figure 2 shown. The ship anchoring operation mode is adopted. According to the depth plan of the hydrological monitoring measurement points, the seabed-based system is transported to the designated position. The schematic diagram of the seabed-based system is as shown in Figure 3 shown, and the seabed-based system is deployed to the seabed by means of manual mooring equipment.

[0019] About 90 days after the equipment deployment is completed, equipment maintenance operations are carried out. Through the coordinated use of acoustic release devices and Beidou beacon machines, the controlled release and rapid positioning of the floating body are realized, the sensors and the floating body are cleaned and maintained, and the observation data of the sensors are exported.

[0020] About 365 days after the equipment deployment is completed, equipment recovery operations are carried out. After the ship is in place, the floating body platform is remotely released by the acoustic release device, and the floating body platform is positioned and recovered by using the Beidou beacon machine.

[0021] The depths of the hydrological monitoring measurement points in the layout method include:

[0022] 1) When the water depth is less than 2 meters, the single-point method is used for measurement; when the water depth is 2 - 5 meters, the two-point method is used for measurement; when the water depth is 5 - 8 meters, the three-point method is used for measurement; when the water depth is 8 - 11 meters, the five-point method is used for measurement; when the water depth is greater than 11 meters, the six-point method is used for measurement;

[0023] 2) In the monitoring area, long-term hydrological observation stations are arranged. The bottom-mounted layout method is adopted. After the ship is anchored, the seabed-based system is manually moored to ensure the stable operation of the hydrological observation stations in the marine environment;

[0024] 3) In the monitoring area, short-term hydrological observation stations are arranged. Combining with the positions of the long-term hydrological observation stations, the ship-mounted current profilers and turbidity meters are used for measurement. The measurement levels include the surface layer, i.e., 0.5 meters below the water surface, 0.2H, 0.4H, 0.6H, 0.8H, and the bottom layer, i.e., 0.5 meters above the seabed. Observations are made once an hour for 26 consecutive hours, where H represents the water depth.

[0025] The layout of the short-term hydrological observation stations in the layout method includes:

[0026] 1) The positions of the measurement points are the same as those of the long-term hydrological observation stations to ensure the continuity and consistency of the data;

[0027] 2) High-precision current profilers and turbidity meters are used to ensure the accuracy and reliability of the measurement data;

[0028] The equipment maintenance of long-term hydrological observation stations in the maintenance method includes:

[0029] 1) The equipment maintenance cycle is once every 90 days;

[0030] 2) When the operation ship arrives at the deployment point, adjust the bow direction of the operation ship, carefully judge the wind direction and the sea current direction, adjust the operation ship to sail in the reverse direction of the combined action direction of the sea wind and the sea current, control the ship speed and always pay attention to the GPS or Beidou positioning coordinates on the ship, wait for the attitude control of the operation ship to be stable, and start the recovery and maintenance operation after basically staying at a coordinate point;

[0031] 3) Start the Beidou receiving terminal to receive the positioning information of the water outlet alarm device and be in a continuous receiving state; determine the position of the underwater sensor through divers or the deck unit of the acoustic release device; search underwater or pop up the sensor;

[0032] 4) If the sensor pops up, the floating body platform will float out of the water under the action of buoyancy, and the Beidou receiving terminal can continuously receive the positioning information of the water outlet alarm device, and search for the floating body platform through the positioning information; if it is a diving operation, the diver extracts the sensor underwater.

[0033] 5) Recover the floating body platform by hoisting the towing rope through divers or gantry A frame and gently place it on the deck;

[0034] 6) The maintenance contents include sensor data export, sensor replacement or battery replacement, surface cleaning of the floating body and observation sensors, etc.;

[0035] 7) After the maintenance of the floating body is completed, reassemble it and release it again.

[0036] The equipment recovery of long-term hydrological observation stations in the recovery method includes:

[0037] 1) The equipment recovery cycle is once every 365 days;

[0038] 2) When the operation ship arrives at the deployment point, adjust the bow direction of the operation ship, carefully judge the wind direction and the sea current direction, adjust the operation ship to sail in the reverse direction of the combined action direction of the sea wind and the sea current, control the ship speed and always pay attention to the GPS or Beidou positioning coordinates on the ship, wait for the attitude control of the operation ship to be stable, and start the recovery and maintenance operation after basically staying at a coordinate point;

[0039] 3) Start the Beidou receiving terminal to receive the positioning information of the water outlet alarm device and be in a continuous receiving state;

[0040] 4) Search for the floating body platform underwater through divers or remotely control the release of the floating body platform by the deck unit of the acoustic release device. After the remote control release or successful underwater salvage by divers, the floating body platform floats out of the water;

[0041] 5) Hoist and tow the recovery cable of the floating body platform by the personnel on board or the gantry A on board, gently place it on the deck, and slowly winch up the floating body by the winch.

Claims

1. A method for arranging, maintaining and recovering a seabed-based system observation station, characterized in that: Here are the steps: Step A: According to the needs of marine hydrological monitoring, long-term and short-term hydrological observation stations are set up, and the seabed-based system is transported to the designated location according to the depth of the hydrological monitoring point by ship anchoring operation, and the seabed-based system is deployed to the seabed by artificial mooring equipment; The seabed-based system includes a base, a floating platform, an acoustic releaser, monitoring sensors and a Beidou beacon. The base is used to stably support the seabed-based system, the floating platform provides buoyancy and carries monitoring sensors, the acoustic releaser is used to achieve controllable release of the floating platform, and the Beidou beacon is used to locate the position of the floating platform after it floats up. Step B: 90 days after the seabed-based system is deployed, the seabed-based system maintenance operation is carried out. Through the coordinated use of the acoustic releaser and the Beidou beacon, the controllable release and rapid positioning of the floating platform are realized, the monitoring sensor and the floating platform are cleaned and maintained, and the observation data of the monitoring sensor is exported; Step C: 365 days after the seabed-based system is deployed, the seabed-based system recovery operation is carried out. After the ship is in place, the floating platform is remotely released through the acoustic releaser, and the Beidou beacon is used to locate and recover the floating platform.

2. The method for arranging, maintaining and recovering a seabed-based system observation station according to claim 1, characterized in that: The depth of hydrological monitoring points in the layout method includes: 1) When the water depth is less than 2 meters, the single-point method is used for measurement; when the water depth is 2-5 meters, the two-point method is used for measurement; when the water depth is 5-8 meters, the three-point method is used for measurement; when the water depth is 8-11 meters, the five-point method is used for measurement; when the water depth is greater than 11 meters, the six-point method is used for measurement; 2) Long-term hydrological observation stations are deployed in the monitoring area, using a bottom-mounted layout, and artificially mooring the seabed-based system after the ship is anchored to ensure the stable operation of the hydrological observation station in the marine environment; 3) Short-term hydrological observation stations are deployed in the monitoring area. Combined with the locations of long-term hydrological observation stations, measurements are carried out using ship-mounted current meters and turbidity meters. The measurement levels include the surface layer, i.e. 0.5 m, 0.2H, 0.4H, 0.6H, 0.8H below the water surface, and the bottom layer, i.e. 0.5 m from the bottom. Observations are made once an hour for 26 hours, where H represents the water depth.

3. The method for arranging, maintaining and recovering a seabed-based system observation station according to claim 1, characterized in that: The layout of short-term hydrological observation stations in the layout method includes: 1) The location of the measurement point is consistent with the long-term water observation station to ensure the continuity and consistency of the data; 2) Use flowmeter and turbiditymeter to ensure the accuracy and reliability of measurement data.

4. The method for arranging, maintaining and recovering a seabed-based system observation station according to claim 1, characterized in that: Maintenance methods Medium- and long-term maintenance of hydrological observation station equipment includes: 1) Equipment maintenance cycle is once every 90 days; 2) When the workboat arrives at the deployment point, adjust the bow direction of the workboat, carefully judge the wind direction and current direction, adjust the bow of the workboat to sail in the opposite direction of the combined effect of the sea wind and current, control the ship speed and always pay attention to the GPS or Beidou positioning coordinates on the ship, wait for the attitude control of the workboat to stabilize, and start the recovery and maintenance operations after it remains at a coordinate point; 3) Start the Beidou receiving terminal to receive the positioning information of the water alarm device and keep it in a continuous receiving state; determine the location of the underwater sensor through the diver or the acoustic releaser deck unit; the diver searches or the sensor pops up; 4) If the sensor pops up, the floating platform will float out of the water under the action of buoyancy, and the Beidou receiving terminal can continuously receive the positioning information of the water outflow alarm device, and search for the floating platform through the positioning information; If the diving operation is carried out, the diver will extract the sensor underwater; 5) Recover the floating platform by lifting the traction rope through divers or gantry A frame and place it on the deck stably; 6) Maintenance objects include sensor data export, sensor replacement or battery replacement, and surface cleaning of floating platforms and observation sensors; 7) After the maintenance is completed, the floating body is assembled and released again.

5. The method for arranging, maintaining and recovering a seabed-based system observation station according to claim 1, characterized in that: The recycling method for medium and long-term hydrological observation station equipment recycling includes: 1) The equipment recycling cycle is once every 365 days; 2) When the workboat arrives at the deployment point, adjust the bow direction of the workboat, carefully judge the wind direction and current direction, adjust the bow of the workboat to sail in the opposite direction of the combined effect of the sea wind and current, control the ship speed and always pay attention to the GPS or Beidou positioning coordinates on the ship, wait for the attitude control of the workboat to stabilize, and start the recovery and maintenance operations after it remains at a coordinate point; 3) Start the Beidou receiving terminal to receive the positioning information of the water alarm device and keep it in a continuous receiving state; 4) The floating platform is released by underwater search by divers or remote control by the acoustic releaser deck unit. After the remote control release or underwater salvage by divers is successful, the floating platform floats out of the water; 5) The floating platform is recovered by lifting the traction rope through the ship's personnel or the ship's gantry A frame, and is steadily placed on the deck, and the floating body is slowly hoisted up and recovered by the winch.

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