Seabed-based positioning time service and data recovery system and method

Abstract

The invention relates to the related field of ocean exploration and data acquisition, in particular to a seabed-based positioning time service and data recovery system and method, which realize accurate positioning and time service, flexible data acquisition and recovery and intelligent system maintenance through a multifunctional module stably deployed on a seabed-based platform. The data acquisition module can efficiently acquire marine environment data according to a preset frequency, and the marine environment data is compressed and stored through the data processing module. The data recovery module supports a plurality of modes such as acoustics, optical communication and buoy transmission, and ensures the integrity and safety of data. The system has high stability, expansibility and long-time autonomous operation capability, is suitable for various complex marine environments, and provides technical support for marine scientific research, resource exploration and environment monitoring.

Description

Technical Field

[0001] The present invention relates to the field of ocean exploration and data collection, and in particular to a seabed-based positioning, timing and data recovery system and method. Background Art

[0002] With the development of ocean exploration technology, the development of marine resources and environmental monitoring have put forward higher requirements for high-precision seabed positioning and data acquisition. Traditional ocean data acquisition systems usually rely on buoys or underwater gliders to collect data and transmit the data to the ground at certain time intervals. However, these methods are limited in communication distance, transmission efficiency and positioning accuracy in deep sea environments, and cannot meet the requirements of high precision and high reliability.

[0003] At present, the existing technology still lacks a positioning, timing and data recovery system that can work stably and for a long time on the seabed. The system should have high-precision positioning function, accurate timing capability, and reliable data recovery mechanism to meet the operational needs in complex deep-sea environments. Summary of the invention

[0004] The object of the present invention is to provide a seabed-based positioning, timing and data recovery system and method to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a seabed-based platform, a positioning module, a timing module, a data acquisition module, a data storage module, a data recovery module, a power management module and a control module, wherein the seabed-based platform is installed on the seabed and is used to carry the positioning module, the timing module, the data acquisition module, the data storage module, the data recovery module, the power management module and the control module to ensure the stability of the entire system;

[0006] The positioning module uses ultra-short baseline or long baseline technology to achieve high-precision positioning of the seabed-based platform;

[0007] The timing module has a built-in high-precision atomic clock or a synchronous timing device to ensure the time synchronization of each module in the system;

[0008] The data acquisition module includes a variety of sensors for collecting marine environment data;

[0009] The data storage module is used to store the collected data to ensure long-term preservation of the data;

[0010] The data recovery module transmits the collected data to a surface receiving device through acoustic communication or optical communication technology, or transmits the data to the shore regularly through a buoy system;

[0011] The power management module uses deep-sea long-life batteries or renewable energy power supply systems to ensure long-term operation of the system;

[0012] The control module is used to manage and coordinate the operation of the positioning module, the timing module, the data acquisition module, the data storage module, the data recovery module, and the power management module, and to perform preliminary processing and compression on the data.

[0013] Preferably, the positioning module selects ultra-short baseline or long baseline technology according to actual needs, or uses the two in combination, wherein the specific working steps of the positioning module are as follows:

[0014] Step 1: System initialization: When the positioning module is started, it first performs a system self-check to confirm that all components are working properly;

[0015] Step 2: Signal transmission and reception: The ultra-short baseline of the shipborne transducer or the long baseline of the seabed base station sends out an acoustic signal, and the underwater locator receives the signal and responds;

[0016] Step 3: Data processing and calculation: The signal processing unit receives the transmitted sound wave data, uses the time difference and phase difference measurement parameters to calculate the precise position of the seabed platform;

[0017] Step 4: Position update and storage: The positioning module periodically updates the position information of the seabed-based platform and stores the data in the data storage module for subsequent use.

[0018] Preferably, the timing module specifically includes the following parts: a high-precision atomic clock: as the time reference of the timing module, the high-precision atomic clock can provide an extremely stable and accurate time signal; a synchronous timing device: used to distribute the time signal of the atomic clock to each module of the system to ensure that all devices use the same time reference, and the synchronous timing device includes a time distribution network, specifically the PTP precise time protocol, a GPS receiver, that is, used in the surface part, and a time converter; a time calibration device: used to periodically calibrate the time reference of the system, especially after the system has been running for a long time or has experienced extreme environmental changes, the calibration device readjusts the system time through an external signal source or based on known time events.

[0019] Preferably, the data acquisition module is specifically composed of the following parts:

[0020] Multiple sensors: According to the mission requirements, the data acquisition module is equipped with multiple sensors to measure different marine environmental parameters;

[0021] Data processing unit: responsible for receiving, processing and storing the data collected by the sensor. The data processing unit is equipped with data filtering and preliminary analysis functions to improve the data quality in the subsequent data transmission or recovery process;

[0022] Data storage unit: used to store the collected data locally to ensure that it will not be lost before the data is recovered. The data storage unit includes high-capacity, pressure-resistant and corrosion-resistant storage devices;

[0023] Data transmission unit: transmits the collected data to the ground monitoring station via wired or wireless means.

[0024] Preferably, the multi-sensor specifically includes a temperature sensor, a salinity sensor, a pressure sensor, a dissolved oxygen sensor and a sound velocity profiler, wherein the temperature sensor is used to measure the temperature of seawater; the salinity sensor measures the salinity in seawater; the pressure sensor is used to measure the pressure of seawater, and the pressure data is used to infer the depth of seawater and the total gravity of the water column; the dissolved oxygen sensor measures the concentration of dissolved oxygen in seawater; and the sound velocity profiler is used to measure the sound velocity profile in seawater.

[0025] Preferably, the data recovery module includes the following components:

[0026] Acoustic communication device: using underwater acoustic communication technology to transmit data from the seabed to the surface or intermediate receiving equipment through the characteristics of sound waves propagating in water;

[0027] Optical communication device: using laser or LED light source, through optical fiber or free space optical communication technology, to transmit data at high speed to the surface or intermediate receiving equipment;

[0028] Buoy system: a buoy deployed on the sea surface with built-in communication equipment that can transmit data to a receiving station on shore at regular intervals or in real time;

[0029] Data buffering and processing unit: During data transmission, data is cached, compressed, and encrypted to improve transmission efficiency and security;

[0030] Power management system: Provides the power required by the data recovery module to ensure long-term stable operation in an unattended environment.

[0031] Preferably, the control module specifically includes the following contents:

[0032] a: Composition of the control module: The control module consists of the following components:

[0033] Central processing unit: As the brain of the control module, it is responsible for executing all control instructions and data processing tasks;

[0034] Control algorithms and software: including various control algorithms, status monitoring software and task scheduling programs, which are used to realize intelligent management of various functional modules;

[0035] Interface controller: manages the communication with the data acquisition module, timing module, and data recovery module to ensure the transmission of instructions and data between modules;

[0036] Data processing and compression unit: used to perform preliminary processing on the collected data, including data filtering, format conversion and compression, in order to save storage space and improve transmission efficiency;

[0037] Power management unit: optimizes the system's power consumption distribution to ensure that the system can continue to operate stably in an energy-limited marine environment;

[0038] b: Functions and roles of the control module: The control module coordinates the startup and shutdown of each module according to the task priority and schedule to avoid resource conflicts and task delays; monitors the operating status of each module in real time, including power supply, voltage, and temperature parameters, and adjusts the working mode based on feedback; the control module performs preliminary processing on the collected raw data before data transmission to improve data quality and transmission efficiency;

[0039] c: Control algorithm and software design:

[0040] State machine control: The control module switches the system state, such as data acquisition state, data transmission state, and standby state, according to different task stages and external conditions;

[0041] Adaptive control algorithm: Based on environmental changes, including temperature, pressure, and power supply voltage changes, the control module adaptively adjusts system parameters to optimize system performance;

[0042] Real-time operating system: In application scenarios with high real-time requirements, the control module runs on RTOS to ensure timely scheduling and execution of each task.

[0043] Preferably, a seabed-based positioning timing and data recovery method comprises the following steps:

[0044] Step S1: System deployment

[0045] 1.1 Deployment of seabed-based platform: Before the formal deployment of the system, it is necessary to conduct a detailed geological and environmental survey of the target sea area and select a suitable seabed location with stable geological conditions to avoid displacement or damage of equipment caused by ocean currents, waves or earthquakes; deploy the seabed-based platform and positioning module, timing module, data acquisition module, data storage module, data recovery module, power management module and control module at the predetermined seabed location, and correctly connect each module to the seabed-based platform to form a complete monitoring system;

[0046] 1.2 Equipment inspection: After deployment, conduct a comprehensive inspection of the system to ensure that all modules are working properly, communication lines are unobstructed, and the power module has sufficient power reserve;

[0047] Step S2: Positioning and timing

[0048] 2.1 Start the positioning module: Start the positioning module, use GPS, ultra-short baseline or long baseline technology to obtain the precise location of the system, and calibrate the system's location based on the real-time positioning data to ensure the geographic accuracy of the monitoring data;

[0049] 2.2 Timing module synchronization: Start the timing module and use a high-precision time source to synchronize the time of each device in the system;

[0050] Step S3: Data collection

[0051] 3.1 Sampling frequency setting: The sampling frequency is set in advance according to the requirements of the monitoring task and environmental characteristics;

[0052] 3.2 Data acquisition module startup: According to the set sampling frequency, the data acquisition module is started, and the system activates various sensors deployed on the seabed platform to collect marine environmental data; the collected data will be immediately transmitted to the data storage module for storage;

[0053] 3.3 Preliminary data processing: Before data storage, the control module performs preliminary processing and compression on the raw data, including data filtering, format conversion, and compression;

[0054] Step S4: Data recovery

[0055] 4.1 Regular data recovery: According to the system design and task requirements, the data recovery module is started regularly;

[0056] 4.2 Data transmission: The system transmits data from the seabed-based platform to the surface receiving device through acoustic communication; when high-speed data transmission is required, the system quickly transmits data to the receiving device through underwater optical fiber or free space optical communication; the system regularly transmits data to the shore through the buoy system;

[0057] 4.3 Data security: The data recovery module will encrypt data for transmission and use a redundant backup strategy;

[0058] Step S5: System maintenance

[0059] 5.1 Regular maintenance: formulate regular system maintenance plan to ensure the normal operation of positioning module, timing module, data acquisition module, data storage module, data recovery module, power management module and control module;

[0060] 5.2 Energy replenishment: During maintenance, regularly replace or recharge the power module

[0061] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention ensures the accuracy of the geographical location and time reference of the system by stably deploying the seabed-based platform at a predetermined seabed position and combining it with an advanced positioning and timing module. This design effectively avoids the problem of inaccurate data caused by position drift or time asynchronism in traditional systems, and greatly improves the overall stability and data reliability of the system; the present invention adopts a variety of sensors and data acquisition modules, which can perform efficient data acquisition according to a preset sampling frequency. Combined with data processing and compression technology, the system can minimize the bandwidth and energy required for data storage and transmission while ensuring data quality. This not only improves the efficiency of data acquisition, but also provides a guarantee for long-term, low-power operation; the data recovery module of the present invention supports a variety of communication methods, including acoustic communication, optical communication, and remote data transmission through a buoy system. According to the actual application environment and data transmission requirements, the system can flexibly select the most suitable communication method. This diversified communication method ensures the efficiency and safety of data recovery, especially in a complex marine environment, and can cope with various possible communication challenges; the present invention uses an advanced energy management system and modular design to enable the system to operate stably for a long time without supervision. Regular system maintenance plans, including replacement or charging of the power module, as well as the system's automatic fault detection and emergency handling functions, ensure that the system can continue to work in harsh marine environments, reducing dependence on human resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0063] Figure 2 It is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] See also Figure 1-2,The present invention provides a technical solution: a seabed-based platform, a positioning module, a timing module, a data acquisition module, a data storage module, a data recovery module, a power management module and a control module. The seabed-based platform is installed on the seabed and is used to carry the positioning module, the timing module, the data acquisition module, the data storage module, the data recovery module, the power management module and the control module to ensure the stability of the entire system;

[0066] The module uses ultra-short baseline or long baseline technology to achieve high-precision positioning of seabed-based platforms;

[0067] The timing module has a built-in high-precision atomic clock or synchronous timing device to ensure the time synchronization of each module in the system;

[0068] The data acquisition module includes a variety of sensors for collecting marine environment data;

[0069] The data storage module is used to store the collected data to ensure long-term preservation of the data;

[0070] The data recovery module transmits the collected data to the surface receiving device through acoustic communication or optical communication technology, or transmits the data to the shore regularly through the buoy system;

[0071] The power management module uses deep-sea long-life batteries or renewable energy power supply systems to ensure long-term operation of the system;

[0072] The control module is used to manage and coordinate the operation of the positioning module, timing module, data acquisition module, data storage module, data recovery module, and power management module, and to perform preliminary processing and compression on the data.

[0073] Furthermore, the positioning module selects the ultra-short baseline or long baseline technology according to actual needs, or uses a combination of the two. The specific working steps of the positioning module are as follows:

[0074] Step 1: System initialization: When the positioning module is started, it first performs a system self-check to confirm that all components are working properly;

[0075] Step 2: Signal transmission and reception: The ultra-short baseline of the shipborne transducer or the long baseline of the seabed base station sends out an acoustic signal, and the underwater locator receives the signal and responds;

[0076] Step 3: Data processing and calculation: The signal processing unit receives the transmitted sound wave data, uses the time difference and phase difference measurement parameters to calculate the precise position of the seabed platform;

[0077] Step 4: Position update and storage: The positioning module periodically updates the position information of the seabed-based platform and stores the data in the data storage module for subsequent use.

[0078] Furthermore, the timing module specifically includes the following parts: a high-precision atomic clock: as the time base of the timing module, the high-precision atomic clock can provide extremely stable and accurate time signals; a synchronous timing device: used to distribute the time signal of the atomic clock to various modules of the system to ensure that all devices use the same time base. The synchronous timing device includes a time distribution network, specifically the PTP precise time protocol, a GPS receiver, that is, used in the surface part, and a time converter; a time calibration device: used to regularly calibrate the time base of the system, especially after the system has been running for a long time or has experienced extreme environmental changes. The calibration device readjusts the system time through an external signal source or based on known time events.

[0079] Furthermore, the data acquisition module is specifically composed of the following parts:

[0080] Multiple sensors: According to the mission requirements, the data acquisition module is equipped with multiple sensors to measure different marine environmental parameters;

[0081] Data processing unit: responsible for receiving, processing and storing the data collected by the sensor. The data processing unit is equipped with data filtering and preliminary analysis functions to improve the data quality in the subsequent data transmission or recovery process;

[0082] Data storage unit: used to store the collected data locally to ensure that it will not be lost before the data is recovered. The data storage unit includes high-capacity, pressure-resistant and corrosion-resistant storage devices;

[0083] Data transmission unit: transmits the collected data to the ground monitoring station via wired or wireless means.

[0084] Furthermore, the multi-sensor specifically includes a temperature sensor, a salinity sensor, a pressure sensor, a dissolved oxygen sensor and a sound velocity profiler, wherein the temperature sensor is used to measure the temperature of seawater; the salinity sensor measures the salinity in seawater; the pressure sensor is used to measure the pressure of seawater, and the pressure data is used to infer the depth of seawater and the total gravity of the water column; the dissolved oxygen sensor measures the concentration of dissolved oxygen in seawater; and the sound velocity profiler is used to measure the sound velocity profile in seawater.

[0085] Furthermore, the data recovery module includes the following components:

[0086] Acoustic communication device: using underwater acoustic communication technology to transmit data from the seabed to the surface or intermediate receiving equipment through the characteristics of sound waves propagating in water;

[0087] Optical communication device: using laser or LED light source, through optical fiber or free space optical communication technology, to transmit data at high speed to the surface or intermediate receiving equipment;

[0088] Buoy system: a buoy deployed on the sea surface with built-in communication equipment that can transmit data to a receiving station on shore at regular intervals or in real time;

[0089] Data buffering and processing unit: During data transmission, data is cached, compressed, and encrypted to improve transmission efficiency and security;

[0090] Power management system: Provides the power required by the data recovery module to ensure long-term stable operation in an unattended environment.

[0091] Furthermore, the control module specifically includes the following contents:

[0092] a: Composition of the control module: The control module consists of the following components:

[0093] Central processing unit: As the brain of the control module, it is responsible for executing all control instructions and data processing tasks;

[0094] Control algorithms and software: including various control algorithms, status monitoring software and task scheduling programs, which are used to realize intelligent management of various functional modules;

[0095] Interface controller: manages the communication with the data acquisition module, timing module, and data recovery module to ensure the transmission of instructions and data between modules;

[0096] Data processing and compression unit: used to perform preliminary processing on the collected data, including data filtering, format conversion and compression, in order to save storage space and improve transmission efficiency;

[0097] Power management unit: optimizes the system's power consumption distribution to ensure that the system can continue to operate stably in an energy-limited marine environment;

[0098] b: Functions and roles of the control module: The control module coordinates the startup and shutdown of each module according to the task priority and schedule to avoid resource conflicts and task delays; monitors the operating status of each module in real time, including power supply, voltage, and temperature parameters, and adjusts the working mode based on feedback; the control module performs preliminary processing on the collected raw data before data transmission to improve data quality and transmission efficiency;

[0099] c: Control algorithm and software design:

[0100] State machine control: The control module switches the system state, such as data acquisition state, data transmission state, and standby state, according to different task stages and external conditions;

[0101] Adaptive control algorithm: Based on environmental changes, including temperature, pressure, and power supply voltage changes, the control module adaptively adjusts system parameters to optimize system performance;

[0102] Real-time operating system: In application scenarios with high real-time requirements, the control module runs on RTOS to ensure timely scheduling and execution of each task.

[0103] Furthermore, a method for seabed-based positioning, timing and data recovery comprises the following steps:

[0104] Step S1: System deployment

[0105] 1.1 Deployment of seabed-based platform: Before the formal deployment of the system, it is necessary to conduct a detailed geological and environmental survey of the target sea area and select a suitable seabed location with stable geological conditions to avoid displacement or damage of equipment caused by ocean currents, waves or earthquakes; deploy the seabed-based platform and positioning module, timing module, data acquisition module, data storage module, data recovery module, power management module and control module at the predetermined seabed location, and correctly connect each module to the seabed-based platform to form a complete monitoring system;

[0106] 1.2 Equipment inspection: After deployment, conduct a comprehensive inspection of the system to ensure that all modules are working properly, communication lines are unobstructed, and the power module has sufficient power reserve;

[0107] Step S2: Positioning and timing

[0108] 2.1 Start the positioning module: Start the positioning module, use GPS, ultra-short baseline or long baseline technology to obtain the precise location of the system, and calibrate the system's location based on the real-time positioning data to ensure the geographic accuracy of the monitoring data;

[0109] 2.2 Timing module synchronization: Start the timing module and use a high-precision time source to synchronize the time of each device in the system;

[0110] Step S3: Data collection

[0111] 3.1 Sampling frequency setting: The sampling frequency is set in advance according to the requirements of the monitoring task and environmental characteristics;

[0112] 3.2 Data acquisition module startup: According to the set sampling frequency, the data acquisition module is started, and the system activates various sensors deployed on the seabed platform to collect marine environmental data; the collected data will be immediately transmitted to the data storage module for storage;

[0113] 3.3 Preliminary data processing: Before data storage, the control module performs preliminary processing and compression on the raw data, including data filtering, format conversion, and compression;

[0114] Step S4: Data recovery

[0115] 4.1 Regular data recovery: According to the system design and task requirements, the data recovery module is started regularly;

[0116] 4.2 Data transmission: The system transmits data from the seabed-based platform to the surface receiving device through acoustic communication; when high-speed data transmission is required, the system quickly transmits data to the receiving device through underwater optical fiber or free space optical communication; the system regularly transmits data to the shore through the buoy system;

[0117] 4.3 Data security: The data recovery module will encrypt data for transmission and use a redundant backup strategy;

[0118] Step S5: System maintenance

[0119] 5.1 Regular maintenance: formulate regular system maintenance plan to ensure the normal operation of positioning module, timing module, data acquisition module, data storage module, data recovery module, power management module and control module;

[0120] 5.2 Energy replenishment: During maintenance, regularly replace or recharge the power module.

[0121] The present invention ensures the accuracy of the system's geographical location and time reference by stably deploying the seabed-based platform at a predetermined seabed position and combining it with an advanced positioning and timing module. This design effectively avoids the problem of inaccurate data caused by position drift or time asynchronism in traditional systems, greatly improving the overall stability and data reliability of the system; the present invention adopts a variety of sensors and data acquisition modules, which can perform efficient data acquisition according to a preset sampling frequency. Combined with data processing and compression technology, the system can minimize the bandwidth and energy required for data storage and transmission while ensuring data quality. This not only improves the efficiency of data acquisition, but also provides a guarantee for long-term, low-power operation; the data recovery module of the present invention supports a variety of communication methods, including acoustic communication, optical communication, and remote data transmission through a buoy system. According to the actual application environment and data transmission requirements, the system can flexibly select the most suitable communication method. This diversified communication method ensures the efficiency and safety of data recovery, especially in a complex marine environment, and can cope with various possible communication challenges; the present invention uses an advanced energy management system and modular design to enable the system to operate stably for a long time without supervision. Regular system maintenance plans, including replacement or charging of the power module, as well as the system's automatic fault detection and emergency handling functions, ensure that the system can continue to work in harsh marine environments, reducing dependence on human resources.

[0122] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seabed-based positioning, timing and data recovery system, comprising a seabed-based platform, a positioning module, a timing module, a data acquisition module, a data storage module, a data recovery module, a power management module and a control module, characterized in that: The seabed-based platform is installed on the seabed and is used to carry the positioning module, timing module, data acquisition module, data storage module, data recovery module, power management module and control module to ensure the stability of the entire system; The positioning module uses ultra-short baseline or long baseline technology to achieve high-precision positioning of the seabed-based platform; The timing module has a built-in high-precision atomic clock or a synchronous timing device to ensure the time synchronization of each module in the system; The data acquisition module includes a variety of sensors for collecting marine environment data; The data storage module is used to store the collected data to ensure long-term preservation of the data; The data recovery module transmits the collected data to a surface receiving device through acoustic communication or optical communication technology, or transmits the data to the shore regularly through a buoy system; The power management module uses deep-sea long-life batteries or renewable energy power supply systems to ensure long-term operation of the system; The control module is used to manage and coordinate the operation of the positioning module, the timing module, the data acquisition module, the data storage module, the data recovery module, and the power management module, and to perform preliminary processing and compression on the data.

2. A seabed-based positioning, timing and data recovery system according to claim 1, characterized in that: The positioning module selects ultra-short baseline or long baseline technology according to actual needs, or uses a combination of the two. The specific working steps of the positioning module are as follows: Step 1: System initialization: When the positioning module is started, it first performs a system self-check to confirm that all components are working properly; Step 2: Signal transmission and reception: The ultra-short baseline of the shipborne transducer or the long baseline of the seabed base station sends out an acoustic signal, and the underwater locator receives the signal and responds; Step 3: Data processing and calculation: The signal processing unit receives the transmitted sound wave data, uses the time difference and phase difference measurement parameters to calculate the precise position of the seabed platform; Step 4: Position update and storage: The positioning module periodically updates the position information of the seabed-based platform and stores the data in the data storage module for subsequent use.

3. A seabed-based positioning, timing and data recovery system according to claim 1, characterized in that: The timing module specifically includes the following parts: High-precision atomic clock: As the time reference of the timing module, the high-precision atomic clock can provide extremely stable and accurate time signals; Synchronous timing device: used to distribute the time signal of the atomic clock to each module of the system to ensure that all devices use the same time reference. The synchronous timing device includes a time distribution network, specifically the PTP precise time protocol, a GPS receiver, that is, used in the surface part, and a time converter; Time calibration device: used to regularly calibrate the system's time reference, especially after the system has been running for a long time or has experienced extreme environmental changes. The calibration device readjusts the system time through an external signal source or based on known time events.

4. A seabed-based positioning, timing and data recovery system according to claim 1, characterized in that: The data acquisition module specifically consists of the following parts: Multiple sensors: According to the mission requirements, the data acquisition module is equipped with multiple sensors to measure different marine environmental parameters; Data processing unit: responsible for receiving, processing and storing the data collected by the sensor. The data processing unit is equipped with data filtering and preliminary analysis functions to improve the data quality in the subsequent data transmission or recovery process; Data storage unit: used to store the collected data locally to ensure that it will not be lost before the data is recovered. The data storage unit includes high-capacity, pressure-resistant and corrosion-resistant storage devices; Data transmission unit: transmits the collected data to the ground monitoring station via wired or wireless means.

5. A seabed-based positioning, timing and data recovery system according to claim 4, characterized in that: The multi-sensor specifically includes a temperature sensor, a salinity sensor, a pressure sensor, a dissolved oxygen sensor and a sound velocity profiler, wherein the temperature sensor is used to measure the temperature of seawater; the salinity sensor measures the salinity in seawater; the pressure sensor is used to measure the pressure of seawater, and the pressure data is used to infer the depth of seawater and the total gravity of the water column; the dissolved oxygen sensor measures the concentration of dissolved oxygen in seawater; and the sound velocity profiler is used to measure the sound velocity profile in seawater.

6. A seabed-based positioning, timing and data recovery system according to claim 1, characterized in that: the data recovery module comprises the following components: Acoustic communication device: using underwater acoustic communication technology to transmit data from the seabed to the surface or intermediate receiving equipment through the characteristics of sound waves propagating in water; Optical communication device: using laser or LED light source, through optical fiber or free space optical communication technology, to transmit data at high speed to the surface or intermediate receiving equipment; Buoy system: a buoy deployed on the sea surface with built-in communication equipment that can transmit data to a receiving station on shore at regular intervals or in real time; Data buffering and processing unit: During data transmission, data is cached, compressed, and encrypted to improve transmission efficiency and security; Power management system: Provides the power required by the data recovery module to ensure long-term stable operation in an unattended environment.

7. A seabed-based positioning, timing and data recovery system according to claim 1, characterized in that: the control module specifically includes the following contents: a: Composition of the control module: The control module consists of the following components: Central processing unit: As the brain of the control module, it is responsible for executing all control instructions and data processing tasks; Control algorithms and software: including various control algorithms, status monitoring software and task scheduling programs, which are used to realize intelligent management of various functional modules; Interface controller: manages the communication with the data acquisition module, timing module, and data recovery module to ensure the transmission of instructions and data between modules; Data processing and compression unit: used to perform preliminary processing on the collected data, including data filtering, format conversion and compression, in order to save storage space and improve transmission efficiency; Power management unit: optimizes the system's power consumption distribution to ensure that the system can continue to operate stably in an energy-limited marine environment; b: Functions and roles of the control module: The control module coordinates the startup and shutdown of each module according to the task priority and schedule to avoid resource conflicts and task delays; monitors the operating status of each module in real time, including power supply, voltage, and temperature parameters, and adjusts the working mode based on feedback; the control module performs preliminary processing on the collected raw data before data transmission to improve data quality and transmission efficiency; c: Control algorithm and software design: State machine control: The control module switches the system state, such as data acquisition state, data transmission state, and standby state, according to different task stages and external conditions; Adaptive control algorithm: Based on environmental changes, including temperature, pressure, and power supply voltage changes, the control module adaptively adjusts system parameters to optimize system performance; Real-time operating system: In application scenarios with high real-time requirements, the control module runs on RTOS to ensure timely scheduling and execution of each task.

8. A method for seabed-based positioning, timing and data recovery according to any one of claims 1 to 7, characterized in that it comprises the following steps: Step S1: System deployment 1.1 Deployment of seabed-based platform: Before the formal deployment of the system, it is necessary to conduct a detailed geological and environmental survey of the target sea area and select a suitable seabed location with stable geological conditions to avoid displacement or damage of equipment caused by ocean currents, waves or earthquakes; deploy the seabed-based platform and positioning module, timing module, data acquisition module, data storage module, data recovery module, power management module and control module at the predetermined seabed location, and correctly connect each module to the seabed-based platform to form a complete monitoring system; 1.2 Equipment inspection: After deployment, conduct a comprehensive inspection of the system to ensure that all modules are working properly, communication lines are unobstructed, and the power module has sufficient power reserve; Step S2: Positioning and timing 2.1 Start the positioning module: Start the positioning module, use GPS, ultra-short baseline or long baseline technology to obtain the precise location of the system, and calibrate the system's location based on the real-time positioning data to ensure the geographic accuracy of the monitoring data; 2.2 Timing module synchronization: Start the timing module and use a high-precision time source to synchronize the time of each device in the system; Step S3: Data collection 3.1 Sampling frequency setting: The sampling frequency is set in advance according to the requirements of the monitoring task and environmental characteristics; 3.2 Data acquisition module startup: According to the set sampling frequency, the data acquisition module is started, and the system activates various sensors deployed on the seabed platform to collect marine environmental data; the collected data will be immediately transmitted to the data storage module for storage; 3.3 Preliminary data processing: Before data storage, the control module performs preliminary processing and compression on the raw data, including data filtering, format conversion, and compression; Step S4: Data recovery 4.1 Regular data recovery: According to the system design and task requirements, the data recovery module is started regularly; 4.2 Data transmission: The system transmits data from the seabed-based platform to the surface receiving device through acoustic communication; When high-speed data transmission is required, the system quickly transmits data to the receiving device through underwater optical fiber or free space optical communication; the system regularly transmits data to the shore through a buoy system; 4.3 Data security: The data recovery module will encrypt data for transmission and use a redundant backup strategy; Step S5: System maintenance 5.1 Regular maintenance: formulate regular system maintenance plan to ensure the normal operation of positioning module, timing module, data acquisition module, data storage module, data recovery module, power management module and control module; 5.2 Energy replenishment: During maintenance, regularly replace or recharge the power module.

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