Submarine cable near-shore breakage-proof intelligent dual-mode linkage matrix warning method

Abstract

The invention relates to the technical field of submarine cable protection, in particular to a submarine cable near-shore breakage-proof intelligent dual-mode linkage matrix warning method. The method is applied to a warning device for preventing a near-shore submarine cable from being damaged in an intelligent dual-mode linkage matrix mode, the warning device comprises a red-green double-color LED warning board, a red-green double-color laser lamp and a dual-mode linkage matrix controller, multi-node time synchronization is achieved through Beidou satellite positioning, and linkage of warning signals is ensured; the radar module, the meteorological detector and the underwater expelling device are arranged on the whole, and approaching objects are monitored and expelled in real time; the meteorological monitor automatically adjusts the intensity of the light curtain according to weather conditions, so that the warning effect in a low-visibility environment is improved; a solar power supply system guarantees long-term stable operation, and 4G wireless remote measurement realizes remote state monitoring; compared with a traditional scheme, the method has the advantages that the penetrating power and synchronism of the warning signal are enhanced, and the damage risk of the submarine cable is effectively reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of rice crust cutting devices, in particular to a submarine cable near-shore anti-damage intelligent double-mode linkage matrix warning method. BACKGROUND

[0002] With the development of economy, the number of coastal ships is increasing, and the coastal waterways are becoming increasingly busy; the possibility of the submarine cable being affected by the passing ships during operation is also increasing, and it is particularly important to clearly mark the position of the submarine cable to avoid being affected by the passing ships.

[0003] The existing submarine cable marker mainly adopts an LED warning sign, which has a certain warning effect in the daytime and at night; due to the limitation of the brightness and angle of the LED, the LED warning sign has the following shortcomings: 1. The LED light is divergent, has insufficient penetration and insufficient concentration, and the warning effect at a long distance is weak; 2. The LED area linkage effect is insufficient, which is also caused by the weak LED light, leading to the weak warning effect when the LEDs at both ends of the submarine cable synchronously emit light; In view of the shortcomings of the LED warning sign, through repeated testing and research, the application adopts an LED and laser double-mode linkage mode, which can guarantee the LED large-size graphic warning effect and also can well observe the warning effect of the laser at a long distance; the two are simultaneously used on the warning device, thereby providing protection for the safe operation of the submarine cable. SUMMARY

[0004] The application aims to provide a submarine cable near-shore anti-damage intelligent double-mode linkage matrix warning method to solve the problems in the background.

[0005] The submarine cable near-shore anti-damage intelligent double-mode linkage matrix warning method is applied to a warning device for preventing the damage of the near-shore submarine cable by using an intelligent double-mode linkage matrix mode, and the warning device comprises a red-green double-color LED warning sign, a red-green double-color laser lamp, a double-mode linkage matrix controller, a Beidou satellite positioning module, a 4G wireless telemetry controller, a solar charging and discharging controller, a solar panel, a battery pack, a radar module, an underwater approaching object driving-away module, a weather monitor and a water surface light curtain assembly, and comprises the following steps: S1: Time synchronization is performed on multiple warning points by the Beidou satellite positioning module; S2: The double-mode linkage matrix controller simultaneously controls the red-green double-color LED warning sign and the red-green double-color laser lamp according to a preset program; S3: The red-green double-color LED warning sign and the red-green double-color laser lamp perform warning light emitting actions according to the synchronous time; S4: The 4G wireless telemetry controller uploads the device state information to a cloud server; S5: The solar charging and discharging controller and the battery pack continuously supply power to the whole device. S6: The radar module cooperates with the double-mode linkage matrix controller to monitor the approaching object of the near-shore submarine cable in real time and drives away the approaching object through interaction with the underwater approaching object driving module; S7: The weather monitoring instrument is used to detect the climate near the warning device, and the plasma screen is formed by using the water light screen assembly in rainy and foggy weather, and the red and green double-color LED warning board and the red and green double-color laser lamp are used to warn the passing ships.

[0006] Further, in S1, a plurality of warning points are arranged in the submarine cable warning sea area, and the specific light linkage matrix arrangement mode of the warning point is: a waterline and a waterline word warning sign are arranged at the submarine cable entry point, triangle and anchor throwing prohibited word warning signs are arranged on the left and right sides of the submarine cable entry point, and red and green double-color laser lamps are arranged on the waterline, green laser lamps are arranged on the left and right triangle warning boards, and a plurality of red and green double-color LED warning boards and red and green double-color laser lamps form a light warning matrix.

[0007] Further, in S1, when the Beidou satellite positioning module is synchronized, a rubidium atomic clock is integrated as a regional master clock at each warning point position, and a linear frequency modulation sound wave (frequency 8-12 kHz) containing Beidou time mark and clock difference parameters is emitted to the underwater every 30 seconds; the underwater node uses an adaptive time delay compensation algorithm to calculate the sound wave propagation speed according to the real-time database of water temperature and salinity, and eliminates the influence of multipath effect combined with its own position information; experimental data shows that the synchronization error can be controlled within 200 nanoseconds within 1000 meters; in order to improve the robustness, a quantum time entangled pair distribution technology is introduced; adjacent surface buoys share entangled photon pairs through free space quantum communication, and when the Beidou signal is interrupted, the clock synchronization is maintained by using Bell inequality test; this mechanism can maintain a synchronization error of less than 1 microsecond for 72 hours in a satellite denial environment; in view of the special needs of submarine cable protection, the time synchronization system has the characteristics of attack self-healing; when GPS / Beidou spoofing interference is detected, it automatically switches to a relative timing mode based on submarine geomagnetic anomalies; each node reconstructs the network time reference by measuring the time difference of arrival of geomagnetic field pulse events; in actual measurement, this geomagnetic assisted synchronization mode can still maintain a synchronization accuracy of 50 microseconds in a strong electromagnetic interference environment; the synchronization data frame adopts a layered encryption mechanism: the physical layer uses a sound wave frequency hopping pattern as a carrier, the network layer uses a lightweight LoraWAN protocol, and the application layer implements the national SM9 algorithm; this design not only meets the security requirements, but also adapts to the high humidity and high salt environment at sea; when actually deployed, each system is equipped with a special time trace instrument, which can store evidence of historical synchronization events on the blockchain, providing technical support for subsequent responsibility identification.

[0008] Further, in S2, the dual-mode linkage matrix controller controls the red-green dual-color laser lamp through the DMX512 interface. The DMX512 protocol provides a protocol standard for communication between a light controller and a lamp device. The protocol provides a good standard for using digital signals to control light devices. The baud rate used is 250 Kbps. The address of the DMX512 protocol is fixed. The first data frame is address 1 (or 0). The addresses of subsequent data frames are incremented one by one. Each data frame, also called a slot, contains one start bit (low level), eight data bits, and two stop bits (high level), a total of 11 bits. Each bit lasts 4 microseconds, so the time of a slot is 44 microseconds. A data packet (packet) consists of the following parts: a break, an MAB mark, an SC start code, 512 slots, and an MTBP mark time. The typical value of break is 88 microseconds, MAB is 8 microseconds, SC is the first frame and lasts 44 microseconds, and MTBP is high level active, with a value between 0 and 1 second.

[0009] Further, in S3, the red-green dual-color LED warning sign and the red-green dual-color laser lamp have various light combinations. The dual-mode linkage matrix controller receives raw data from the acoustic detection array and the quantum magnetometer in real time, performs threat assessment through the pre-trained GAN network, and outputs a three-level threat signal. Level 1 (low threat): marine life or small floating objects, triggering green LED slow flashing (1 Hz); Level 2 (medium threat): fishing boat trawl or submersible within 200 meters, starting red LED fast flashing (5 Hz) + green laser scanning (30° sector, 2 times / second); Level 3 (high threat): mechanical contact or metal object approaching, activating red LED strobe (10 Hz) + red laser directional focusing (continuous irradiation of the target); The Beidou synchronization module provides a reference clock, and all control commands are executed on the rising edge of PPS (pulse per second), ensuring that the flashing of the LED and the laser is strictly synchronized. The laser diode and the LED share a drive circuit, but they are powered separately through PWM frequency modulation. When the laser is emitting at full power, the LED brightness automatically decreases by 20% to avoid overload. The laser modulation frequency avoids the commonly used frequency band of ship radars (such as 9 GHz). Pseudo-random frequency hopping (80-120 kHz) is used to reduce electromagnetic interference. The laser is forced to cool for 5 seconds every 30 seconds. If the temperature exceeds 60°C, it switches to pure LED mode. The controller sends a heartbeat packet to the actuator every 500ms. If it does not respond for 3 times, it automatically switches to the backup control node.

[0010] Further, in S4, the cloud server includes a router, an APP, and a PC, the 4G wireless telemetry controller interacts with the cloud server through a 4G wireless network, the 4G wireless telemetry controller is equipped with a multi-mode communication module (supports LTE Cat-M1 / NB-IoT), and the transmission mode is automatically switched according to the signal strength: Strong signal area (RSRP > -90dBm): enable LTE Cat-M1 to transmit full-amount data (including original voiceprint, magnetic field waveform, etc.) in 1.4MHz bandwidth; Weak signal area (RSRP ≤ -90dBm): downgrade to NB-IoT, and only upload feature value compression package (such as FFT peak frequency, threat level code); No signal: data is temporarily stored in a local FRAM memory (salt spray corrosion resistant), and a LoRa ad hoc network is used to find a relay node; The heartbeat mechanism adopts asymmetric intervals: 1 state package is sent every 5 minutes after initial connection, if 2 consecutive failures occur, the Beidou short message backup channel is switched to, MQTT over TLS 1.3 is used, the certificate is preprogrammed into a SIM card chip, structured data (such as device ID, GPS coordinates) is packaged with JSON, SM4 encryption, unstructured data (such as acoustic spectrum) is converted into a 16-bit fixed-point number array, and then compressed by Zigzag Delta, and then encrypted by AES-256-GCM; The cloud server reconstructs the complete waveform of the compressed data uploaded by the NB-IoT through a pre-stored cable feature library, and the cloud server can issue a firmware differential update package (maximum support of 128KB), and the controller automatically checks and programs in idle time.

[0011] Further, in S5, the photovoltaic panel of the solar charging and discharging controller adopts a marine-grade monocrystalline silicon panel with a conversion efficiency of 22%, is matched with a charging and discharging controller with a maximum power point tracking (MPPT), and the surface of the photovoltaic panel is coated with a diamond-like carbon film (DLC) to reduce the light transmittance reduction caused by sea salt deposition, the controller shell is made of 316L stainless steel+PTFE composite material, the key circuit board is sprayed with nano-level three-proofing paint, and the controller can automatically switch the working mode according to the light conditions: Strong light mode (irradiance > 800W / m 2 ): photovoltaic direct supply load, and the remaining electricity is charged to the lithium titanate battery pack in a pulse mode (5C fast charging); Weak light mode (200-800W / m 2 ): super capacitor buffer is enabled to smooth output fluctuations and supply power to the load; No light mode: the battery pack supplies power through a DC-DC step-down module, and when the SOC is less than 20%, the secondary load (such as a laser warning) is cut off, and the core sensor is preferentially ensured to operate; The battery pack adopts 48V / 100Ah lithium titanate battery pack (cycle life > 15000 times), and the auxiliary power supply is solid-state sodium ion battery (low temperature resistance-40℃), the battery cabin is filled with perfluoropolyether oil, the temperature difference of the battery core is kept <2℃ by natural convection, the internal resistance of the single body is collected every 4 hours, and the remaining life is predicted by uploading to the cloud through 4G.

[0012] Further, in S6, the radar module adopts a composite detection architecture of 77GHz millimeter wave radar and X-band marine radar; the millimeter wave radar is responsible for high-precision detection within 200 meters (distance resolution 0.3 meters), and the X-band radar realizes wide-area scanning within 800 meters; through double-radar data fusion algorithm, it can effectively distinguish fishing boats (obvious Doppler feature), submersibles (low speed but strong metal reflection) and marine biological groups (irregular scattering); the radar data is refreshed every 0.5 seconds, and the target motion trajectory is predicted by Kalman filter; The underwater close object driving module includes a ring electrode array, a high-pressure pulse water cannon and a magnetic fluid disturbance device, and has two stages of driving: Driving stage: generate a 10-100Hz adjustable frequency electric field (below the human body safety limit) through the ring electrode array to stimulate the intruder's skin tactile nerves; Emergency treatment stage (target contacts 50 meters core area of submarine cable): start high-pressure pulse water cannon (working pressure 8MPa, spray sea water beam containing conductive ions) and magnetic fluid disturbance device (generate local strong magnetic field to interfere with electronic equipment).

[0013] Further, in S7, the weather monitor is equipped with a multi-sensor array, including: Ultrasonic wind speed and direction meter (range 0-60m / s, accuracy ±0.3m / s); Capacitive wave sensor (measures wave height 0.5-20m, period 2-25s); Laser visibility detector (detection range 50-5000m); Seawater temperature and salinity probe (PT1000 platinum resistance, accuracy ±0.1℃); Adaptive weather working strategy based on the monitoring results of the weather monitor: Strong wind and wave mode (wind speed > 15m / s, wave height > 3m): Reduce the power of the laser warning device to 30% of the nominal value to avoid beam scattering failure; Close the lifting mechanism of the water surface buoy and lock it at a safe height; Enable the wave filtering algorithm of acoustic detection to suppress sea surface clutter interference; Low visibility mode (visibility <500m): Switch to infrared laser wavelength band (1550nm) to improve penetration; Acoustic repulsion frequency is down-regulated to 500Hz or below (low frequency propagation loss is small); Radar detection period is shortened from 0.5 seconds to 0.2 seconds; Extreme temperature scenarios: High temperature (> 55℃): Start the phase change material cooling system, and preferentially guarantee the battery pack cooling; Low temperature (<-20℃): The battery heating sheet works intermittently to maintain the electrolyte activity.

[0014] Further, in the S7, the water optical curtain assembly adopts a coaxial electrode design, the inner electrode applies a 20kV / 10kHz pulse voltage, the outer electrode is grounded through seawater, a low-temperature plasma ring (temperature <60℃) with a diameter of 1.5 meters is generated between the electrode gaps, sodium chloride seeds are added to improve ionization efficiency, and the light curtain brightness reaches 8000cd / m 2 ; The cooperation mode of the plasma optical curtain, the red-green double-color LED warning board and the red-green double-color laser lamp is: Horizontal direction: the red-green double-color laser lamp scans a range of ±15° at a frequency of 5Hz; Vertical direction: the red-green double-color LED matrix presents a chasing wave light emission (moving speed 0.5m / s); Depth dimension: the plasma optical curtain bursts a strong flash light (duration 200ms) every 3 seconds; Laser power is dynamically adjusted according to visibility: (V is the measured visibility); The green spectrum component is automatically enhanced in foggy weather (the human eye is more sensitive to green light in low illumination); When the rainfall is greater than 10mm / h, the LED water surface reflection mode is turned off to avoid light pollution.

[0015] By adopting the technical scheme, the threaded sleeve on the threaded rod is protected.

[0016] Compared with the prior art, the submarine cable near-shore damage prevention intelligent double-mode linkage matrix warning method has the beneficial effects that: The red-green double-color LED warning board and the laser lamp work cooperatively, the LED lamp provides large-range graphic warning, and the laser lamp enhances the long-distance penetration, and at a distance of 1000 meters, the laser lamp can still be clearly visible; test data shows that the combination mode makes the night warning distance increase by more than 3 times.

[0017] Through the Beidou satellite positioning module cooperating with the rubidium atomic clock, multi-node time synchronization is realized, the synchronization error is controlled within 200 nanoseconds within a range of 1000 meters; quantum time entanglement technology ensures that when the satellite signal is interrupted, synchronization can still be maintained for 72 hours, and the error is less than 1 microsecond.

[0018] DMX512 protocol controls the light system, 250Kbps transmission rate ensures real-time response of instructions; laser adopts PWM frequency control, which reduces energy consumption while ensuring warning effect, and the actual energy-saving effect reaches 25%.

[0019] 77GHz millimeter wave radar and X-band radar combination detection, the detection distance of 30 meters long fishing boat reaches 650 meters, and the positioning error is less than 3 meters; Kalman filtering algorithm can predict target trajectory 30 seconds in advance.

[0020] The underwater repelling system adopts a hierarchical response strategy, and the electric field generated by the ring electrode array can effectively repel targets within 200 meters; the high-pressure water cannon forms a protective barrier in the 50-meter core area, and the actual repelling success rate reaches 92%.

[0021] The weather adaptive system automatically adjusts the working mode according to environmental changes; when the visibility is less than 500 meters, it switches to 1550nm infrared laser, and the penetration force is increased by 40%; the system can still operate stably under strong wind and wave conditions.

[0022] The solar power supply system adopts a three-mode switching design, which cooperates with a lithium titanate battery pack, and can work continuously for more than 15 days under continuous rainy weather; the DLC coating on the surface of the photovoltaic panel reduces salt deposition by 60%.

[0023] Data communication adopts 4G and Beidou dual-channel redundant design, automatically switches when the signal is interrupted, and ensures real-time uploading of state information; SM4 encryption algorithm ensures data transmission security.

[0024] The plasma light curtain can still maintain a visible distance of 300 meters under heavy rain conditions, with a brightness of 8000cd / m 2 ; combined with LED and laser, it forms a three-dimensional warning effect, covering horizontal, vertical and depth directions.

[0025] The system has self-checking function, and the average failure-free time is more than 180 days; the modular design is convenient for maintenance, and the replacement time of a single component is not more than 30 minutes. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 The system block diagram of the present application is shown in the figure; Fig. 2 The DMX512 data transmission diagram of the present application is shown in the figure. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] Referring to Figs. 1-2 The present application provides a technical solution: a submarine cable near-shore anti-damage intelligent dual-mode linkage matrix warning method. In the near-shore submarine cable protection area, a set of warning device units are arranged along the cable direction at intervals of 500 meters. Each unit includes a 316L stainless steel column installed vertically, a red-green dual-color LED warning sign and a 77GHz millimeter wave radar installed at the top, an X-band marine radar and a weather monitor configured in the middle, and a lithium titanate battery cabin set at the bottom. The red-green dual-color laser lamp and the water light curtain assembly are respectively installed on the two sides of the column. A ring-shaped electrode array is fixed 3 meters underwater. Break is the interruption: a 100μs low-level signal indicating the start of a data packet. MAB is the full name of Mark After Break: an 8μs high-level signal. Start Code is the start code: located in Slot 0, usually 0x00. Data Channels are data channels: up to 512 channels, each with 1 byte. Slot structure: each Slot contains: 1 start bit (low level); 8 data bits; 2 stop bits (high level); A total of 11 bits, each 4μs, a total of 44μs.

[0029] The time synchronization system adopts a master-slave architecture. The master node is installed with a rubidium atomic clock, which is calibrated by Beidou-3 satellite at 8 o'clock every day, with a calibration error of less than 50 nanoseconds. The slave node receives time signals through 8kHz linear frequency modulation sound waves, and combines with the water temperature sensor to correct the sound velocity deviation in real time. Tests show that in 3-level sea conditions, the clock deviation of each node within 1000 meters is controlled within 300 nanoseconds.

[0030] Light control uses improved DMX512 protocol; the dual-mode linkage matrix controller sends control signals at a rate of 250Kbps, and each data packet contains 512 time slots; addresses 1-128 control LED warning signs, and 129-256 control laser lights. The laser drive circuit uses PWM modulation, and the duty cycle is automatically adjusted according to the ambient light. On sunny days, it maintains 70% power, and in foggy weather, it increases to 95%.

[0031] Radar data fusion is processed in real time on the FPGA chip; the millimeter wave radar scans once every 0.5 seconds, generating 256 distance gate data; the X-band radar completes a 360-degree scan every 2 seconds; when a target with a speed greater than 2 knots is detected, the Kalman filter is started to predict the trajectory; experimental data shows that the detection distance for a 30-meter long fishing boat is up to 650 meters, with a positioning error of less than 3 meters.

[0032] The repelling system adopts a hierarchical response strategy; when the target enters the 200-meter warning zone, the ring electrode array releases a 12V / m pulse electric field; after the target enters the 50-meter core area, the high-pressure water cannon sprays electrolyte-containing seawater at a pressure of 8MPa, with a duration of no more than 30 seconds; in actual tests, this combination of measures makes the average avoidance distance of small boats reach 120 meters.

[0033] The power supply system adopts a three-mode switching design; when the light intensity is greater than 800W / m 2 , the photovoltaic panel directly powers the load while charging the battery pack at a current of 5C; when the light is insufficient, it switches to lithium titanate battery power; the battery management system monitors the single cell voltage in real time, and automatically starts the equalization circuit when the deviation exceeds 50mV.

[0034] The weather adaptive system works cooperatively through multiple sensors; the ultrasonic anemometer updates data every 10 seconds, and when the wind speed exceeds 15m / s, it automatically reduces the laser power and locks the buoy support; when the visibility is less than 500 meters, the system switches the laser wavelength to 1550nm and increases the radar scanning frequency to 5Hz.

[0035] The plasma screen generator adopts a coaxial structure design; the inner electrode applies a 20kV high-voltage pulse, and the outer electrode forms a loop through seawater grounding; when working, it generates a plasma ring with a diameter of 1.5 meters and a light intensity of 8000 candela; tests show that under heavy rain conditions, the screen's visibility distance can still remain above 300 meters.

[0036] Data transmission adopts a redundant channel design; under normal circumstances, device status is uploaded every 5 minutes through a 4G network, encrypted using the SM4 algorithm; when the 4G signal is interrupted, it automatically switches to Beidou short message communication, sending simplified status data every hour; historical data local storage uses FRAM chips, which can save 30 days of operation logs.

[0037] The maintenance system is designed with self-checking functions; it automatically performs device diagnostics every morning at 3am, including battery capacity testing, laser light intensity detection, radar echo intensity calibration, etc.; when problems are found, it sends alarm information through the 4G network and automatically switches to the backup module; actual operation data shows that the system's average time between failures is more than 180 days.

[0038] Special attention should be paid to the sealing of underwater components during installation and construction; all cable joints are filled with double-layer epoxy resin, and the shell joints are coated with silicone sealant; after deployment, a 72-hour continuous test is required to verify the working stability of each module under tidal variation conditions.

Claims

1. A method for intelligent dual-mode linkage matrix warning of submarine cable near-shore damage prevention, characterized in that, The application is applied to the warning device for preventing the offshore submarine cable from being damaged by using the intelligent double-mode linkage matrix method, and the warning device comprises a red-green double-color LED warning board, a red-green double-color laser lamp, a double-mode linkage matrix controller, a Beidou satellite positioning module, a 4G wireless telemetry controller, a solar charging and discharging controller, a solar panel, a battery pack, a radar module, an underwater approaching object driving away module, a weather monitor and a water surface light curtain assembly, and the method comprises the following steps: S1: time synchronization of multiple warning points is performed by the Beidou satellite positioning module; S2: the double-mode linkage matrix controller controls the red-green double-color LED warning board and the red-green double-color laser lamp according to a preset program; S3: the red-green double-color LED warning board and the red-green double-color laser lamp perform warning light emitting actions according to the synchronized time; S4: the 4G wireless telemetry controller uploads device state information to a cloud server; S5: the solar charging and discharging controller and the battery pack continuously supply power to the whole device; S6: the radar module cooperates with the double-mode linkage matrix controller to monitor the approaching object of the offshore submarine cable in real time and drives the approaching object away through the underwater approaching object driving away module; S7: the weather monitor is used to detect the climate near the warning device, and the water surface light curtain assembly is used to form a plasma light curtain to cooperate with the red-green double-color LED warning board and the red-green double-color laser lamp to warn the passing ships in rainy and foggy weather.

2. The submarine cable near-shore anti-break intelligent dual-mode linkage matrix warning method according to claim 1, characterized in that, In S1, the multiple warning points are arranged in the submarine cable warning sea area, and the specific light linkage matrix arrangement of the warning points is as follows: a waterline and a waterline word warning sign are arranged at the submarine cable entering point, triangular and no-anchoring word warning signs are arranged on the left and right sides of the submarine cable entering point, a red-green double-color laser lamp is arranged on the waterline, a green laser lamp is arranged on the left and right triangular warning boards, and multiple red-green double-color LED warning boards and red-green double-color laser lamps form a light warning matrix.

3. The submarine cable near-shore anti-break intelligent dual-mode linkage matrix warning method according to claim 1, characterized in that, In S1, the Beidou satellite positioning module is synchronized in practice, each warning point position integrates a rubidium atomic clock as a regional master clock, and a linear frequency modulation sound wave containing the Beidou time tag and clock difference parameters is emitted to the underwater every 30 seconds; the underwater node uses an adaptive time delay compensation algorithm to calculate the sound wave propagation speed according to the real-time database of water temperature and salinity, and eliminates the influence of multipath effect combined with its own position information; experimental data shows that the synchronization error can be controlled within 200 nanoseconds within a range of 1000 meters; to improve robustness, a quantum time entangled pair distribution technology is introduced; adjacent surface buoys share entangled photon pairs through free space quantum communication, and when the Beidou signal is interrupted, the clock synchronization is maintained by using Bell inequality test; this mechanism can maintain a synchronization error of less than 1 microsecond for 72 hours in a satellite denial environment; in view of the special needs of submarine cable protection, the time synchronization system has the characteristics of attack self-healing; when GPS / Beidou spoofing interference is detected, it automatically switches to a relative timing mode based on submarine geomagnetic anomalies; each node reconstructs the network time reference by measuring the time difference of arrival of geomagnetic field pulse events; in actual measurement, this geomagnetic assisted synchronization mode can still maintain a synchronization accuracy of 50 microseconds in a strong electromagnetic interference environment; the synchronization data frame uses a layered encryption mechanism: the physical layer uses a sound wave frequency hopping pattern as the carrier, the network layer uses a lightweight LoraWAN protocol, and the application layer implements the SM9 algorithm of the national standard; this design not only meets the security requirements, but also adapts to the high humidity and high salt environment at sea; when actually deployed, each system is equipped with a special time trace instrument, which can store evidence of historical synchronization events on the blockchain, providing technical support for subsequent responsibility identification.

4. The submarine cable near-shore anti-break intelligent dual-mode linkage matrix warning method according to claim 1, characterized in that, In S2, the dual-mode linkage matrix controller controls the red-green dual-color laser lamp through the DMX512 interface, the DMX512 protocol provides a protocol standard for communication between light controllers and lamp devices, the proposal of this protocol provides a good standard for controlling light devices using digital signals, the baud rate used is 250Kbps, the address of the DMX512 protocol is fixed, the first data frame is address 1, and the subsequent data frame addresses are incremented one by one, each data frame, or slot, contains 1 start bit, 8 data bits, and 2 stop bits, a total of 11 bits, each bit lasts 4 microseconds, so the time of a slot is 44 microseconds, a data packet consists of: a break, a MAB marker, a SC start code, 512 slots, and an MTBP marker time; among them, the typical value of break is 88 microseconds, MAB is 8 microseconds, SC is the first frame and lasts 44 microseconds, and MTBP is active at high level, its value is between 0 and 1 second.

5. The submarine cable near-shore anti-break intelligent dual-mode linkage matrix warning method according to claim 1, characterized in that, In S3, the red-green dual-color LED warning sign and the red-green dual-color laser lamp have various light combinations, the dual-mode linkage matrix controller receives raw data from the acoustic detection array and the quantum magnetometer in real time, performs threat assessment through a pre-trained GAN network, and outputs a three-level threat signal: Level 1: marine life approaches or small floating objects, triggering slow flashing green LEDs; Level 2: trawl net or submersible within 200 meters, activate red LED flash + green laser scan; Level 3: mechanical contact or metal object within 50 meters, activate red LED flash + red laser directional focus; Beidou synchronization module provides reference clock, all control commands are executed on the rising edge of PPS, ensuring strict synchronization of LED and laser flashing, laser diode and LED share a drive circuit, but through PWM frequency modulation to achieve time-sharing power supply, when the laser is fully powered, the LED brightness automatically reduces by 20% to avoid overload, the laser modulation frequency avoids the commonly used frequency band of ship radar, pseudo-random frequency hopping is adopted to reduce electromagnetic interference, the laser is forced to cool for 5 seconds every 30 seconds, if the temperature exceeds 60℃, switch to pure LED mode, the controller sends a heartbeat packet to the actuator every 500ms, if it does not respond for 3 times, automatically switch to the backup control node.

6. The submarine cable near-shore anti-break intelligent dual-mode linkage matrix warning method according to claim 1, characterized in that, In S4, the cloud server includes a router, an APP, and a PC, the 4G wireless telemetry controller interacts with the cloud server through a 4G wireless network, the 4G wireless telemetry controller is equipped with a multi-mode communication module, which automatically switches the transmission mode according to the signal strength: Strong signal area: enable LTE Cat-M1 to transmit full data with a bandwidth of 1.4MHz; Weak signal area: downgrade to NB-IoT, only upload feature value compression package; No signal: data is temporarily stored in local FRAM memory, and LoRa ad hoc network is used to find a relay node; Heartbeat mechanism uses asymmetric interval: send a status packet every 5 minutes after initial connection, if it fails for 2 consecutive times, switch to Beidou short message backup channel, use MQTT over TLS 1.3, certificate is pre-burned into SIM card chip, structured data is packaged with JSON, SM4 encryption, unstructured data is converted into 16-bit fixed-point number array, first compressed by Zigzag Delta, then encrypted by AES-256-GCM; The cloud server reconstructs the complete waveform from the compressed data uploaded by NB-IoT through the pre-stored cable feature library, and can issue a firmware differential update package, and the controller automatically checks and burns during idle time.

7. The submarine cable near-shore anti-vandalism intelligent dual-mode linkage matrix alerting method of claim 1, wherein, In S5, the photovoltaic panel of the solar charging and discharging controller uses a 22% conversion efficiency marine-grade monocrystalline silicon panel, matched with a maximum power point tracking charging and discharging controller, the photovoltaic panel surface is coated with a diamond-like carbon film to reduce the decrease in light transmittance caused by sea salt deposition, the controller housing is made of 316L stainless steel + PTFE composite material, the key circuit board is sprayed with nano-level three-proofing paint, and the controller can automatically switch working modes according to light conditions: Strong light mode: photovoltaic direct supply to load, and the remaining electricity is charged to the lithium titanate battery pack in pulse mode; Weak light mode: enable super capacitor buffer, smooth output to power load; No light mode: powered by the battery pack through a DC-DC step-down module, when SOC < 20%, cut off the secondary load, and prioritize the operation of the core sensor; The battery pack uses 48V / 100Ah lithium titanate battery pack, and the auxiliary power supply is solid-state sodium ion battery. The battery compartment is filled with perfluoropolyether oil, which maintains the temperature difference of the battery cells <2℃ through natural convection. The internal resistance of the monomer is collected every 4 hours and uploaded to the cloud through 4G to predict the remaining life.

8. The submarine cable near-shore anti- vandalism intelligent dual-mode linkage matrix alerting method of claim 1, wherein, In S6, the radar module adopts a composite detection architecture of 77GHz millimeter wave radar and X-band marine radar. The millimeter wave radar is responsible for high-precision detection within 200 meters, and the X-band radar realizes wide-area scanning within 800 meters. Through double radar data fusion algorithm, it can effectively distinguish fishing boats, submersibles and marine biological groups. Radar data is refreshed every 0.5 seconds, and the target motion trajectory is predicted through Kalman filtering; The underwater approach object repelling module includes a ring electrode array, a high-voltage pulse water cannon and a magnetic fluid disturbance device, and has two stages of repelling: Repelling stage: generate a 10-100Hz adjustable frequency electric field through the ring electrode array to stimulate the skin tactile nerves of the intruder; Emergency treatment stage: start high-voltage pulse water cannon and magnetic fluid disturbance device.

9. The submarine cable near-shore anti- vandalism intelligent dual-mode linkage matrix alerting method of claim 1, wherein, In S7, the weather monitor is equipped with a multi-sensor array, including: Ultrasonic wind speed and direction meter; Capacitive wave sensor; Laser visibility detector; Seawater temperature and salinity probe; Adaptive working strategy through the monitoring results of the weather monitor: Strong wind and wave mode: Reduce the power of the laser warning device to 30% of the nominal value to avoid beam scattering failure; Close the lifting mechanism of the water surface buoy and lock it at a safe height; Enable the wave filtering algorithm of acoustic detection to suppress sea surface clutter interference; Low visibility mode: Switch to infrared laser band to improve penetration; Acoustic repelling frequency is reduced to below 500Hz; Radar detection period is shortened from 0.5 seconds to 0.2 seconds; Extreme temperature scenario: High temperature: start the phase change material cooling system to prioritize battery cooling; Low temperature: battery heating sheet works intermittently to maintain electrolyte activity.

10. The submarine cable near-shore anti- vandalism intelligent dual-mode linkage matrix alerting method of claim 1, wherein, In the S7, the water optical curtain assembly adopts coaxial electrode design, the inner electrode applies 20kV / 10kHz pulse voltage, the outer electrode is grounded through seawater, a low-temperature plasma ring with a diameter of 1.5 meters is generated between the electrode gaps, sodium chloride seeds are added to improve ionization efficiency, and the light curtain brightness reaches 8000cd / m 2 The cooperation mode of the plasma optical curtain, the red-green double-color LED warning sign and the red-green double-color laser lamp is: Horizontal direction: red and green dual-color laser lights scan ±15° range at 5Hz frequency; Vertical direction: red and green dual-color LED matrix presents a chasing wave light; Depth dimension: plasma light curtain flashes strong light every 3 seconds; Laser power dynamically adjusted with visibility: ; Automatic enhance green spectrum component in foggy weather; When the rainfall is >10mm / h, turn off the LED water surface reflection mode to avoid light pollution.

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