Deck control unit for release and signal transmission based on underwater acoustic communication

Abstract

The invention discloses a deck control unit for release and signal transmission based on underwater acoustic communication, and relates to the technical field of marine seismic exploration and geological instruments. The underwater acoustic communication-based deck control unit for release and signal transmission comprises a hardware unit and a PC end control software module in communication connection with the hardware unit, and the hardware unit integrates core control, display, a multi-mode interface, a special power supply and an underwater acoustic communication adaptation function to form a stable and reliable operation platform. PC end software realizes full-process intelligent control including human-computer interaction, protocol coding and decoding, state and waveform data acquisition, safe release control and custom instruction editing and issuing through modular design, and the adaptability, the operation flexibility and the safety are improved through software and hardware cooperation, so that the system is suitable for large-scale popularization and application. And efficient, reliable and convenient-to-operate deck control is provided for marine seismic exploration operation.

Description

Technical Field

[0001] This invention relates to the field of marine seismic exploration and geological instrument technology, specifically to a deck control unit for release and signal transmission based on underwater acoustic communication. Background Technology

[0002] In the field of marine seismic exploration and seabed geological surveys, seabed seismometers, as a core detection device, are deployed on the seabed for extended periods to collect crucial geological data such as seismic wave signals. After data acquisition, they must be remotely released and retrieved via deck equipment, while simultaneously acquiring the equipment status and collected data. Therefore, an efficient, reliable, and easy-to-operate deck control unit is crucial to ensuring the smooth progress of the entire exploration operation.

[0003] Existing equipment is mostly of general-purpose design and lacks in-depth adaptation for specific OBS models. It is often difficult to collect, analyze and intuitively display the core working status of OBS, such as remaining battery power, storage capacity usage, and built-in working modes. It is also difficult to perform specialized analysis and visualization of high-fidelity seismic waveform data collected by OBS. During the inspection process, it is difficult for operators to quickly and accurately assess the health of the equipment and the quality of data collection, which affects the efficiency of operational decision-making.

[0004] The limitations of existing technologies include at least the following issues: insufficient adaptability, lack of specialized acquisition, analysis, and visualization capabilities for OBS status and seismic waveform data, making it difficult for operators to quickly and accurately obtain core geological information and affecting operational judgment; lack of operational flexibility, supporting only fixed-format commands, making it difficult to adapt to the personalized parameter configuration and command issuance needs in complex exploration scenarios; low release control security, lacking a pre-verification mechanism for OBS working status, easily triggering release in abnormal equipment conditions, leading to equipment loss or data corruption; and failure to optimize transmission strategies for underwater acoustic channel characteristics and waveform data features, easily resulting in waveform distortion and data loss, affecting the accuracy of geological analysis. In addition, existing technologies lack a systematic design, making it difficult to achieve an effective balance between the mutually restrictive goals of operational convenience, data reliability, release security, and functional flexibility, thus reducing the overall efficiency and reliability of marine exploration operations. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a deck control unit for release and signal transmission based on underwater acoustic communication, which solves the problems of poor adaptability, low security, unreliable transmission, and lack of systematic balance in existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a deck control unit for release and signal transmission based on underwater acoustic communication, comprising: a hardware unit and a PC-side control software module communicatively connected to the hardware unit; the hardware unit includes: a core control module for coordinating the work of each module, processing PC-side commands, and parsing OBS feedback data to achieve command forwarding and data relay functions; a display module for real-time display of device connection status, OBS status data, seismic waveform curves, operation instructions, and alarm information; an interface module including at least a serial port for serial transmission of commands and data, a network port for connecting to the PC, and a charging port; a power supply module for supplying power to the hardware unit; and an underwater acoustic communication adapter module for connecting the core control module to an external underwater acoustic communication device to achieve bidirectional conversion between electrical signals and underwater acoustic signals.

[0007] Furthermore, the PC-side control software module includes: an interactive interface module, comprising a visual operation interface with a device connection area, a status query area, a release control area, and a custom data packet editing area; a protocol parsing module, which has a built-in OBS dedicated communication protocol, used to encode user operation commands into data packets conforming to the protocol format for distribution through the underwater acoustic communication adapter module, and to decode feedback data packets received from OBS through the underwater acoustic communication adapter module; an OBS status and waveform acquisition module, used to respond to user operations in the status query area, call the protocol parsing module to generate and distribute status query commands, and display the status data decoded by the protocol parsing module in the status query area of ​​the interactive interface module; a release control module, used to generate and distribute release commands after verifying the OBS status; and a custom data packet module, used to provide the functionality of the custom data packet editing area, generate custom data packets based on user-edited content, and call the protocol parsing module for encoding and distribution.

[0008] Furthermore, the release control module's verification of the target OBS status includes: determining whether the target OBS's battery power is lower than a preset battery power threshold, whether its storage capacity has not been released, whether its attitude is abnormal, or whether the packet loss rate of the underwater acoustic communication link with the hardware unit is higher than a preset packet loss rate threshold; if any of these conditions are met, the verification fails, the release control module prohibits the issuance of release commands, and triggers an alarm in the interactive interface module.

[0009] Furthermore, the PC-side control software module also includes a data transmission optimization module: when the OBS status and waveform acquisition module acquires waveform data, it controls the OBS to transmit the waveform data in segments of a preset size through the data transmission optimization module, verifies each received data segment, and automatically requests retransmission of data segments that fail verification.

[0010] Furthermore, the hardware unit also includes a GPS module: the GPS module is used to receive satellite signals and calculate positioning information; and transmit the positioning information to the core control module, which then sends the positioning information to the display module for real-time display.

[0011] Furthermore, the power module includes: a rechargeable battery pack; a charging management circuit connected to the charging port of the interface module for charging the battery pack, which has overcharge, overvoltage, overcurrent, short circuit and reverse connection protection mechanisms, and can automatically switch to float charging mode after the battery pack is fully charged; and a step-down circuit for converting the voltage of the battery pack into the operating voltage required by each module in the hardware unit.

[0012] Furthermore, the custom data packet module provides editing functions that allow users to perform the following operations in the editing interface: setting the data packet type; specifying the target OBS device ID; defining the data content and length; selecting the verification method; and configuring the data packet sending mode.

[0013] Furthermore, the PC-side control software also includes a log recording module: the log recording module is configured to automatically record the following three types of logs: operation logs of users performing device connection, status query, release control, and custom data packet sending through the interactive interface module; communication logs of command and data transmission and reception between the underwater acoustic communication adapter module and OBS, including transmission and reception time and link quality parameters; and fault logs of anomalies and alarms generated during system operation and interaction with OBS.

[0014] The present invention has the following beneficial effects:

[0015] Through deep customization of integrated hardware and software, the system achieves specialized acquisition, analysis, and integrated visualization of OBS device status and seismic waveforms. This significantly improves human-computer interaction efficiency and operational judgment accuracy, and enhances adaptability. Secondly, the safety release control mechanism automatically verifies the OBS's power, storage, attitude, and communication links from multiple dimensions before release, thus eliminating the risk of accidental release and ensuring device and data security. Optimization strategies such as waveform data fragmentation transmission and verification retransmission are employed to ensure the integrity and high fidelity of large-capacity waveform data, laying the foundation for accurate geological analysis. Simultaneously, the system supports visual custom data packet editing and distribution, possessing high operational flexibility and scenario adaptability. It also integrates automatic log recording and traceability functions for the entire operation, communication, and fault processes, achieving closed-loop management of operations. Thus, while improving operational efficiency and reliability, the system achieves a systematic balance between multiple objectives such as ease of operation, data reliability, release security, and functional flexibility.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] Figure 1 This is a hardware connection diagram of a deck control unit for release and signal transmission based on underwater acoustic communication according to the present invention.

[0018] Figure 2 This is a software flowchart of a deck control unit for release and signal transmission based on underwater acoustic communication according to the present invention. Detailed Implementation

[0019] Please see Figure 1 This invention provides a technical solution: a deck control unit for release and signal transmission based on underwater acoustic communication, comprising: a hardware unit and a PC-side control software module communicatively connected to the hardware unit; the hardware unit includes: a core control module, which can use an industrial-grade MCU (microcontroller unit) as the core processing unit, preferably an STM32F2 series, used to coordinate the work of various modules, process PC-side commands and parse OBS feedback data to realize command forwarding and data relay functions; and a display module, a single industrial-grade display screen (size selectable 7-10 inches, resolution 1280×800), integrated on the front of the control unit, used to display the device connection status, OBS status data, seismic waveform curves, operation instructions and alarm information in real time;

[0020] The interface module includes at least a serial port for serial transmission of commands and data, an Ethernet port for connecting to a PC, and a charging port. Specifically: Charging port: three-phase charging cable, 220V AC input, built-in fuse, used to charge the control unit's built-in lithium battery, and can also directly supply power; Serial port: RS485 / RS232 dual-mode serial port (can be switched via software), used to connect to the serial interface of an external underwater acoustic communication module or to connect to the serial interface of an external underwater acoustic communication module to achieve serial transmission of commands and data; Ethernet port: Gigabit Ethernet interface (RJ45), used for direct wired connection to a PC, adaptable to high-speed data transmission scenarios; Power switch: self-locking waterproof metal switch, controlling the overall power supply to the control unit.

[0021] The power module supplies power to the hardware units. The battery module uses a 24V lead-acid battery (using a dual-series combination of 12V 100Ah lead-acid batteries, with a capacity selectable from 100Ah to 150Ah). It features vibration resistance and a wide operating temperature range of -10℃ to 55℃. Combined with the system's low-power design, it can support 8-12 hours of continuous operation, fully meeting the endurance requirements of a single marine geological exploration operation. It is equipped with a 220V AC input charging module with an adjustable charging current of 5A-10A. The underwater acoustic communication adapter module is used to connect the core control module to the external underwater acoustic communication equipment (underwater acoustic modem + transducer). It supports serial port / network port signal conversion and realizes bidirectional conversion between electrical signals and underwater acoustic signals. The underwater acoustic modem supports FSK / PSK modulation and demodulation methods, operates at a frequency of 9~15kHz, and is compatible with the OBS underwater acoustic communication protocol.

[0022] The hardware unit also includes a GPS module: the GPS module is used to receive satellite signals such as GPS / BeiDou and calculate the current latitude, longitude, altitude, time, speed and other positioning information of the control unit; it communicates with the core control module through UART (serial port) to transmit the positioning information to the core control module, and the core control module sends the positioning information to the display module for real-time display. It uses an industrial-grade high-sensitivity GPS module, supports cold / hot start, has positioning accuracy up to the meter level, has anti-interference capability, and is adaptable to the complex electromagnetic environment of the marine environment. It is equipped with a small, waterproof, high-gain external active GPS antenna, which is connected to the module through the SMA interface. The antenna must be installed in an unobstructed place outside the control unit to ensure good satellite signal reception.

[0023] The power module includes: a rechargeable battery pack; a charging management circuit, which connects to the charging port of the interface module to charge the battery pack. It has overcharge, overvoltage, overcurrent, short circuit, and reverse connection protection mechanisms, and can automatically switch to float charging mode after the battery pack is fully charged to avoid battery damage and precisely match the lead-acid battery charging curve; and a step-down circuit, which converts the voltage of the battery pack into the operating voltage required by each module in the hardware unit. The step-down circuit adopts a high-efficiency isolated DC-DC converter with a conversion efficiency of ≥90%, and the total power consumption of the system is strictly controlled to ≤30W.

[0024] In this implementation plan, an industrial-grade MCU, a wide-temperature and shock-resistant battery, and a high-protection-level interface are selected to ensure stable operation of the equipment in complex and harsh marine environments. The interface module design takes into account both versatility and specialization: the dual-mode serial port is compatible with various underwater acoustic communication devices, the gigabit network port ensures high-speed data exchange with the PC, and the intelligent charging management circuit significantly extends battery life and eliminates charging safety hazards through multiple protections and an automatic float charging mechanism. The built-in high-sensitivity GPS module and dedicated antenna provide accurate time and space references for operations. The efficient conversion and strict power consumption control of the power system enable the entire machine to achieve an ultra-long endurance of 8-12 hours with a low power consumption of ≤30W, relying on a large-capacity battery, which fully covers the cycle of a single exploration operation and solves the problem of long-term power supply for deck equipment. This highly integrated, interface-complete, and long-endurance hardware design provides a solid and reliable physical foundation for the realization of upper-level software functions and is the core prerequisite for the efficient and safe operation of the entire system.

[0025] Specifically, such as Figure 2 As shown, the PC-side control software module includes: an interactive interface module, which uses the Qt framework to develop a visual interface, divided into the following functional areas with consistent operation logic, including a device connection area, a status query area, a release control area, and a custom data packet editing area, which is used to receive user operations;

[0026] Device connection area: Displays the connection status with hardware units and underwater acoustic communication modules, supports serial port (port number, baud rate) and network port (IP address, port) parameter configuration, and provides "connect / disconnect" control buttons;

[0027] Status Query Area: Provides two core buttons: "Query OBS Status" and "Get Waveform Information". After clicking, the corresponding command is automatically sent. After receiving the data, the OBS status (battery power, storage capacity, working mode, attitude data) and seismic waveforms (three-component acceleration waveform, seismic wave time domain waveform, underwater acoustic waveform) are displayed on the interface in real time. The waveforms support scaling, panning, and saving operations.

[0028] Release Control Area: Provides a "Release OBS" button. Clicking it will bring up a secondary confirmation window (including OBS device ID selection). After confirmation, a release command will be issued. The interface displays the execution status of the release command in real time ("Command being issued", "Waiting for OBS feedback", "Release successful", "Release failed").

[0029] The protocol parsing module incorporates the OBS dedicated communication protocol, which encodes user operation commands into data packets conforming to the protocol format for distribution via the underwater acoustic communication adapter module. Specifically, it incorporates the OBS dedicated communication protocol from Chongqing Zhongdi Geological Instrument Co., Ltd., as well as industry-standard protocols. The protocol format is defined as "Frame Header (2 bytes) + Device ID (4 bytes) + Data Type (2 bytes) + Data Length (2 bytes) + Data Content (N bytes) + Checksum (2 bytes)". It supports decoding and parsing status and waveform data fed back from the OBS, and also supports custom data packet encoding (generating data packets conforming to the protocol format based on user-edited content), ensuring accurate interaction between commands and data. Furthermore, it decodes the feedback data packets received from the OBS via the underwater acoustic communication adapter module.

[0030] The OBS status and waveform acquisition module is used to respond to user operations in the status query area, call the protocol parsing module to generate and send status query commands, and display the status data decoded by the protocol parsing module in the status query area of ​​the interactive interface module; and to respond to user waveform acquisition operations in the status query area, call the protocol parsing module to generate and send waveform data request commands, and display the waveform data decoded by the protocol parsing module in the status query area of ​​the interactive interface module in the form of waveform graphs.

[0031] Status Acquisition: After the user clicks "Query OBS Status", the software generates a standardized status query command, which is transmitted to the OBS via the hardware unit and the underwater acoustic communication module. After receiving the data, the OBS returns a status data packet, which is decoded by the software and displayed on the interface and screen simultaneously, including key information such as battery power (percentage), storage capacity (used / total capacity), working mode (acquisition / standby), attitude data (pitch angle / roll angle), and air pressure.

[0032] Waveform Acquisition: After the user clicks "Get Waveform Information", a waveform data request command is issued. OBS returns the acquired raw seismic waveform data (supports real-time sampled data or historical cached data). After the software parses the data, it draws the time-domain waveform curve in real time through the waveform graph control. It supports single-channel / multi-channel waveform switching display and can save the waveform data in SAC or TXT format.

[0033] The release control module generates and issues a release command after verifying the OBS status, enabling secure remote release of the OBS. The release control module verifies the target OBS status by: determining if the target OBS's battery level is below a preset battery level threshold (e.g., 20%), if the storage capacity has not been released (data not backed up), if the posture is abnormal (tilted), or if the packet loss rate of the underwater acoustic communication link with the hardware unit exceeds a preset packet loss rate threshold (e.g., 30%). If any of these conditions are met, the verification fails, the release control module prohibits issuing the release command, and triggers an alarm in the interactive interface module. After successful verification, a release command (including device ID, release key, and verification bit) is generated based on the user-selected OBS device ID and accurately sent to the target OBS via the underwater acoustic link. Feedback processing: The module receives feedback signals from the OBS such as "command received confirmation," "release in progress," and "release complete," and updates the interface status in real time. If no feedback is received within the timeout period (default 30s), the command is automatically resent (up to 3 times). If resending fails, an alarm is triggered.

[0034] The custom data packet module provides a custom data packet editing area. It generates custom data packets based on user-edited content and calls the protocol parsing module for encoding and transmission. The editing functions of the custom data packet module allow users to perform the following operations in the editing interface: setting the data packet type; specifying the target OBS device ID; defining data content and length; selecting the verification method; and configuring the data packet sending mode. Specifically, it provides a visual editing interface that supports manual input or importing text files to generate data content. Users can set the target device ID (to avoid accidental triggering by multiple OBSs), data length (to adapt to different transmission needs), and verification method (to ensure data integrity). It supports single-time or cyclic sending (the number of cycles / intervals is configurable), displays the sending progress and result (success / failure) after sending, and receives OBS responses to custom data packets (such as "received successfully" or "execution result"), displaying them on the interface for easy verification of command execution effects.

[0035] The PC-side control software module also includes a data transmission optimization module:

[0036] When acquiring waveform data, the OBS status and waveform acquisition module controls the OBS to transmit waveform data in preset chunks according to a data transmission optimization module (i.e., splitting large-capacity waveform data into 1MB chunks, transmitting each chunk, and adding a sequence number to avoid packet loss due to excessive data volume in a single transmission). Each received data chunk is verified, and any chunks that fail verification are automatically retransmitted (using a CRC32 verification mechanism to verify the integrity of each data chunk; if packet loss or verification failure is detected, a retransmission request is automatically sent). Based on the communication link quality (signal strength, packet loss rate), the module automatically prompts the user to adjust underwater acoustic communication parameters (e.g., increasing transmission power when signal strength is low) to ensure transmission stability.

[0037] The PC-based control software also includes a logging module: This module is configured to automatically record the following three types of logs: operation logs of users performing device connection, status query, release control, and custom data packet sending through the interactive interface module; communication logs of command and data transmission and reception between the underwater acoustic communication adapter module and OBS, including transmission and reception times and link quality parameters; and fault logs of anomalies and alarms generated during system operation and interaction with OBS; all logs can be exported in TXT or CSV format.

[0038] The interaction process between this control unit and the seabed OBS is as follows, adapted to the convenience requirements of inspection operations:

[0039] Equipment deployment and startup: Fix the transducer of the external underwater acoustic communication module to the outside of the deck (unobstructed), and connect the interface module of the underwater acoustic communication module to the interface module of this control unit through serial port or network port; turn on the power switch of the control unit, the display screen lights up, start the PC control software and establish a connection with the control unit;

[0040] Parameter configuration and device matching: In the "Parameter Configuration Area" of the software or display screen, select the communication interface type (serial port / network port), configure the communication parameters and OBS protocol type, and click "Connect". The software will automatically scan for communicable OBS devices and display them in a list (including device ID and model).

[0041] Data acquisition during inspection operations: During the inspection process, the operators can click "Query OBS Status" on the PC to obtain and view the core status of each OBS in real time; click "Get Waveform Information" to receive the seismic waveform data from the OBS, and view the waveform curves intuitively on the interface to judge the data acquisition quality;

[0042] Custom data packet sending: If you need to send personalized commands (such as adjusting OBS acquisition parameters or querying special status), edit the data packet content in the "Custom Data Packet Area", select the target OBS, and click "Send" to complete the command sending and view the OBS feedback results at the same time;

[0043] OBS Release Control: After the job is completed, select the target OBS and click "Release OBS". The software will pop up a secondary confirmation window. After confirmation, the OBS status will be automatically checked. If the check passes, a release command will be issued. After receiving "Release Complete" feedback from the OBS, the interface and the display screen will simultaneously show "Release Successful".

[0044] Operation complete: Disconnect the device, turn off the power to the control unit, export the logs and waveform data, and the operation is finished.

[0045] In this implementation plan, the interactive interface developed based on the Qt framework, through clear area division, separates different functional logics, greatly reducing the operational threshold and improving operational efficiency. The core protocol parsing module, through a built-in dedicated protocol stack, ensures the accuracy and efficiency of command encoding and data decoding, forming the software foundation for reliable communication with hardware and OBS. The most critical improvements in security and reliability are reflected in two core modules: the release control module, by introducing an automated pre-verification and command feedback monitoring and retransmission mechanism for power, storage, attitude, and link quality, constructs an active defense system to eliminate the risk of accidental release; the data transmission optimization module, addressing the contradiction between underwater acoustic channels and large-capacity waveform data, adopts strategies such as fragmented transmission and verification retransmission to intelligently ensure the integrity and fidelity of key geological data. In addition, the custom data packet module provides strong flexibility, supporting personalized command editing and issuance to adapt to complex exploration scenarios; and the full-process log recording realizes the traceability of all operations and communications, providing a complete data closed loop for fault diagnosis and operation optimization, organically integrating convenient operation, safe control, reliable transmission, and flexible expansion, and improving the intelligence of the entire marine exploration operation.

[0046] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A deck control unit for release and signal transmission based on underwater acoustic communication, characterized in that, include: Hardware unit and PC-side control software module communicatively connected to said hardware unit; The hardware unit includes: a core control module for coordinating the work of each module, processing PC-side commands and parsing OBS feedback data, so as to realize command forwarding and data relay functions; The display module is used to display the device connection status, OBS status data, seismic waveform curves, operation instructions and alarm information in real time. The interface module includes at least a serial port for serial transmission of instructions and data, and a network port and a charging port for connecting to a PC. A power module is used to supply power to the hardware unit; The underwater acoustic communication adapter module is used to connect the core control module with an external underwater acoustic communication device to achieve bidirectional conversion between electrical signals and underwater acoustic signals.

2. The deck control unit for release and signal transmission based on underwater acoustic communication according to claim 1, characterized in that, The PC-side control software module includes: The interactive interface module includes a visual operation interface with a device connection area, a status query area, a release control area, and a custom data packet editing area. The protocol parsing module has a built-in OBS dedicated communication protocol, which is used to encode the user operation corresponding instructions into data packets that conform to the protocol format for distribution through the underwater acoustic communication adapter module, and to decode the feedback data packets from OBS received through the underwater acoustic communication adapter module. The OBS status and waveform acquisition module is used to respond to the user's operation in the status query area, call the protocol parsing module to generate and issue a status query command, and display the status data decoded by the protocol parsing module in the status query area of ​​the interactive interface module; The release control module is used to generate and issue release commands after verifying the OBS status. The custom data packet module provides the functionality of the custom data packet editing area, generates custom data packets based on the content edited by the user, and calls the protocol parsing module for encoding and distribution.

3. The deck control unit for release and signal transmission based on underwater acoustic communication according to claim 2, characterized in that, The release control module verifies the target OBS status by: determining whether the target OBS's battery level is lower than a preset battery level threshold, whether its storage capacity has not been released, whether its attitude is abnormal, or whether the packet loss rate of the underwater acoustic communication link with the hardware unit is higher than a preset packet loss rate threshold; if any of these conditions are met, the verification fails, the release control module prohibits the issuance of release commands, and triggers an alarm in the interactive interface module.

4. The deck control unit for release and signal transmission based on underwater acoustic communication according to claim 2, characterized in that, The PC-side control software module also includes a data transmission optimization module: When acquiring waveform data, the OBS status and waveform acquisition module controls the OBS to transmit waveform data in segments of a preset size through the data transmission optimization module. Each received data segment is verified, and data segments that fail verification are automatically retransmitted.

5. The deck control unit for release and signal transmission based on underwater acoustic communication according to claim 1, characterized in that, The hardware unit also includes a GPS module: The GPS module is used to receive satellite signals and calculate positioning information; The positioning information is then transmitted to the core control module, which in turn sends the positioning information to the display module for real-time display.

6. The deck control unit for release and signal transmission based on underwater acoustic communication according to claim 1, characterized in that, The power module includes: Rechargeable battery pack; The charging management circuit is connected to the charging port of the interface module and is used to charge the battery pack. It has overcharge, overvoltage, overcurrent, short circuit and reverse connection protection mechanisms, and can automatically switch to float charging mode after the battery pack is fully charged. A step-down circuit is used to convert the voltage of the battery pack into the operating voltage required by each module within the hardware unit.

7. The deck control unit for release and signal transmission based on underwater acoustic communication according to claim 2, characterized in that, The custom data package module provides editing functions that allow users to perform the following operations in the editing interface: Set the data packet type; Specify the device ID of the target OBS; Define the data content and length; Select the verification method; Configure the data packet sending mode.

8. The deck control unit for release and signal transmission based on underwater acoustic communication according to claim 2, characterized in that, The PC-based control software also includes a log recording module: The logging module is configured to automatically log the following three types of logs: Users can use the interactive interface module to perform operation logs for device connection, status query, release control, and sending custom data packets; The communication logs between the underwater acoustic communication adapter module and OBS include the transmission and reception times and link quality parameters. And fault logs of anomalies and alarms generated during system operation and interaction with OBS.

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