Seabed-based system observation station for marine hydrological observation

Abstract

The invention belongs to the field of ocean engineering structures, and discloses a seabed-based system observation station for ocean hydrological observation. The seabed-based system monitors the flow velocity, the flow direction, the wave, the water bottom turbidity and other parameters of the profile of the water body in a bottom-sitting mode, the system adopts a self-contained working mode, the water body environment parameters are monitored in a fixed sensor data acquisition period, and the long-time data monitoring requirement can be met. According to the method, on the basis of statistical analysis of monitoring data, the actual conditions of ocean hydrology basic data such as ocean current engineering sea area waves, the flow velocity, the flow direction and the sand content near coordinate points are calculated, high calculation efficiency is guaranteed, rapid display of a digital platform software end is met, and engineering practical application is facilitated. The method fits field application, is suitable for research and design work of each stage of submarine cable water area abnormity disposal, and is suitable for ocean engineering fields such as design, operation and maintenance of platforms and the like.

Description

Technical Field

[0001] The present invention belongs to the field of ocean engineering structures and relates to a seabed-based system observation station for ocean hydrological observation. Background Art

[0002] Submarine cables operate at a fixed point in a certain sea area for a long time and are subjected to the action of ocean environmental loads for a long time. For the design and operation and maintenance of ocean engineering structures, it is necessary to calculate the responses of the structures under different ocean environmental conditions. Higher requirements are put forward for the force-bearing, anti-corrosion, durability, and fatigue damage of submarine cable structures.

[0003] In order to ensure the long-term safe service of deep-water submarine cables, more reasonable calculation results are obtained through hydrodynamic simulation or model tests. Hydrodynamic simulation uses mathematical models and calculation algorithms to transform the physical process of fluid flow into mathematical equations, and then numerically solves these equations to predict the behavior and characteristics of the fluid under different conditions. Hydrodynamic model tests construct a model similar to the actual project and use experimental equipment and measuring instruments to observe and measure the characteristics of fluid flow.

[0004] To implement a method for analyzing the distribution characteristics based on measured environmental load data for submarine cables, it is necessary to calculate the responses of the structures under different ocean environmental conditions according to the measured data in the sea area under study; ocean platforms are generally welded by thousands of thin-walled cylindrical members, with complex structures, and some structures are in deep-water areas, making it difficult to deploy sensors for monitoring work.

[0005] The present invention deploys a seabed-based system observation station, integrates equipment such as an acoustic Doppler current profiler, a turbidity meter, and a Beidou beacon machine, and real-time collects key hydrological parameters such as waves, current velocity, current direction, and sediment concentration, and realizes long-term monitoring and efficient recovery by means of self-contained data storage and Beidou positioning technology. Summary of the Invention

[0006] The present invention provides a seabed-based system observation station for ocean hydrological observation to solve the problem of predicting the dynamic response of structures in complex ocean environments.

[0007] The technical solution of the present invention:

[0008] A seabed-based system observation station for ocean hydrological observation:

[0009] The seabed-based system observation station monitors water profile flow velocity, flow direction, waves, and bottom turbidity data by sitting on the seabed. The seabed-based system observation station adopts a self-contained working mode, monitors water environment parameters at a fixed sensor data acquisition cycle, meets the data monitoring requirements for 3 months, releases the floating body sitting on the seabed to the water surface every 3 months for data acquisition, and searches for the floating body through the Beidou beacon. The effective working water depth for monitoring data of the seabed-based system observation station is 50 meters;

[0010] The seabed-based system observation station includes a base, a floating body, an acoustic releaser, monitoring sensors, and a Beidou beacon machine; the acoustic releaser, monitoring sensors, and Beidou beacon machine are fixedly installed on the floating body through fixed fixtures. After being assembled into a complete assembly, the whole is connected to the base through a stainless steel chain.

[0011] The base includes a bottom plate and a lifting ring, and the bottom plate is used for connecting to the chain.

[0012] The outer shell material of the floating body is high-strength glass fiber reinforced plastic, and the inside is filled with high-molecular low-density foam core for providing buoyancy; the floating body is equipped with an acoustic transparent protective cover for protecting the acoustic releaser, wave and current meter, turbidity meter, and Beidou beacon machine carried inside the floating body.

[0013] The acoustic releaser is a shallow water acoustic releaser, and the outer shell is made of strong aluminum metal; the seabed-based system observation station is equipped with two acoustic releasers, which are connected in parallel to ensure the successful release of the floating body.

[0014] The wave and current meter is vertically installed at the center of the floating body.

[0015] The turbidity meter is vertically installed at a corner of the floating body.

[0016] The Beidou beacon machine is vertically installed at a corner of the floating body, opposite to the turbidity meter; the Beidou beacon machine selects a Beidou data transmission terminal and a transmitting antenna to upload position information. When the monitoring sensor detects a preset depth pressure value, the pressure switch is activated, and the data acquisition board controls the Beidou data transmission terminal to upload position information. The uploaded position information is received by a fixed Beidou command machine and queried by a display terminal.

[0017] Advantages of the present invention: Based on the statistical analysis of monitoring data, the present invention calculates the actual conditions of basic marine hydrological data such as waves, flow velocity, flow direction, and sediment concentration in the sea area near the coordinate point in this project, ensuring high calculation efficiency, meeting the rapid display of the digital platform software side, and facilitating engineering practical applications. This method is suitable for on-site applications and is applicable to the research and design work in various stages of abnormal disposal in submarine cable waters, and is applicable to the design and operation and maintenance of platforms and other marine engineering fields. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the integration of seabed-based floating body equipment.

[0019] Figure 2 It is the parallel installation of acoustic release devices.

[0020] Figure 3 It is a schematic diagram of the composition of the seabed base.

[0021] In the figure: 1 acoustic release device; 2 wave and current meter; 3 chain; 4 base lifting ring; 5 turbidity meter; 6 Beidou beacon machine. Specific implementation manners

[0022] The following further describes the specific implementation manners of the present invention in combination with the attached drawings and technical solutions.

[0023] The seabed-based system monitors parameters such as the flow velocity, flow direction of the water body profile, waves and bottom turbidity by the way of sitting on the bottom. The system adopts a self-contained working mode, monitors the water environment parameters at a fixed sensor data acquisition period, can meet the data monitoring requirements for 3 months, and can release the sitting bottom floating body to the water surface every 3 months for data acquisition, and can search for the floating body conveniently through the Beidou beacon. The effective working water depth of the system monitoring data is 50 meters.

[0024] The observation station system of the seabed-based system for marine hydrological observation includes a base, a floating body, an acoustic release device, monitoring sensors and a Beidou beacon machine, etc.; the acoustic release device, monitoring sensors and Beidou beacon machine are fixedly installed on the floating body through fixed jigs. After being assembled into a complete assembly, the whole is connected to the base through a stainless steel chain as Figure 2 .

[0025] The base is welded by steel plates, angle steels, etc., and can be stably placed on the seabed. The bottom plate and lifting ring of the part for fixing the chain have extremely strong corrosion resistance. The external dimensions of the base: length × width × height = 2000 × 2000 × 525 mm; the total weight of the seabed base is 320 kg.

[0026] The outer shell material of the floating body is high-strength glass fiber reinforced plastic, and the inside is filled with high-molecular low-density (40 kg / m3) foam core for providing buoyancy. The floating body is equipped with an acoustic penetration protection cover for protecting the acoustic release device, wave and current meter, turbidity meter and Beidou beacon machine carried inside the floating body. The external dimensions of the seabed-based floating body for carrying monitoring sensors and providing buoyancy: length × width × height = 1300 × 1300 × 695 mm; the total weight of the seabed base is 570 kg. The equipment integration, external view and dimension drawing on the floating body are as Figure 3 .

[0027] The acoustic release is a shallow-water acoustic release with a working depth of 400 meters. Its outer shell is made of strong aluminum metal, and the release mechanism and command coding have been well-tested. The seabed-based system is equipped with two acoustic releases, which are connected in parallel to ensure the successful release of the seabed-based float; it is reliable in use; the anchor system has a small safety volume, is light in weight; it is easy to use, operates quickly, and has a strong structure.

[0028] As Figure 3 shown, the wave current meter is vertically installed at the exact center of the float, the turbidity meter is vertically installed at one corner of the float, and the Beidou beacon machine is vertically installed at one corner of the float, opposite to the turbidity meter. The beacon machine selects the Beidou data transmission terminal and the transmitting antenna to upload the position information. When the pressure sensor detects the pre-set depth pressure value, the pressure switch is activated, and the data acquisition board controls the Beidou data transmission terminal to upload the position information. The uploaded position information is received by a fixed Beidou command machine and can be queried by the display terminal. When the seabed-based float is recovered, it can quickly and conveniently guide the search for the equipment after it is brought out of the water.

[0029] The seabed-based system adopts a self-contained working mode. All the additional sensors carried adopt a self-contained working mode. The data collected by the sensors are automatically stored in the sensors and are extracted when the seabed-based float is recovered. The monitoring sensors can meet the data collection and storage for 3 months.

[0030] Table 1 Sensor Data Collection Period and Working Time

[0031]

Claims

1. A seabed-based system observation station for ocean hydrological observation, characterized in that: The seabed-based system observation station monitors the water profile velocity, flow direction, waves and bottom turbidity data by sitting on the bottom. The seabed-based system observation station adopts a self-contained working mode and monitors the water environment parameters with a fixed sensor data collection cycle to meet the data monitoring needs for 3 months. Every 3 months, the floating body sitting on the bottom is released to the surface for data acquisition, and the floating body is searched by Beidou beacon. The effective working water depth of the seabed-based system observation station monitoring data is 50 meters; The seabed-based system observation station includes a base, a float, an acoustic releaser, a monitoring sensor and a Beidou beacon. The acoustic releaser, the monitoring sensor and the Beidou beacon are fixed to the float through a fixing fixture. After being installed and integrated into a complete assembly, the whole is connected to the base through a stainless steel chain.

2. The seabed-based system observation station according to claim 1, characterized in that: The base comprises a bottom plate and a hanging ring, and the bottom plate is used for chain connection.

3. The seabed-based system observation station according to claim 1, characterized in that: The outer shell material of the float is high-strength glass fiber reinforced plastic, and the interior is filled with a high-molecular low-density foam core for providing buoyancy; the float is equipped with a sound-transparent protective cover for protecting the acoustic releaser, wave current meter, turbidity meter and Beidou beacon carried inside the float.

4. The seabed-based system observation station according to claim 1, characterized in that: The acoustic releaser is a shallow water acoustic releaser, and its outer shell is made of solid aluminum metal; the seabed-based system observation station is equipped with two acoustic releasers, which are connected in parallel to ensure the successful release of the float.

5. The seabed-based system observation station according to claim 1, characterized in that: The wave current meter is vertically installed at the exact center of the floating body.

6. The seabed-based system observation station according to claim 1, characterized in that: The turbidity meter is vertically installed at a corner of the float.

7. The seabed-based system observation station according to claim 1, characterized in that: The Beidou beacon is vertically installed at a corner of the buoy, opposite to the turbidity meter; the Beidou beacon uses a Beidou data transmission terminal and a transmitting antenna to upload position information. When the monitoring sensor detects a preset depth pressure value, the pressure switch is started, and the data acquisition board controls the Beidou data transmission terminal to upload the position information. The uploaded position information is received by the fixed Beidou command machine and queried by the display terminal.

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