Ship ultrasonic anti-biological adhesion optimization method and system based on multi-dimensional environment perception

Abstract

The invention discloses a ship ultrasonic anti-biological adhesion optimization method and system based on multi-dimensional environment perception, and belongs to the technical field of ship maintenance. The method comprises the following steps: acquiring real-time geographic position, navigational speed and time data of a ship; querying in a preset biological attachment risk database based on the geographic position and the time, and determining a basic risk level; correcting the risk level according to the navigational speed to obtain a final risk level; and based on the final risk level, self-adaptive working parameters (such as power and duty ratio) are generated to control the operation of the ultrasonic system. Whether the ship enters special management areas such as a marine ecological protection area or not can be recognized, and the ship is automatically switched to a low-interference environmental protection mode. According to the method, an intelligent closed loop of perception-analysis-decision is constructed, so that the ultrasonic anti-adhesion system can be accurately and dynamically adjusted according to the actual environmental risk, and therefore, the energy consumption is remarkably reduced, the service life of equipment is prolonged, and the environmental friendliness is improved while the biological adhesion is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of ship maintenance technology, and in particular to an optimized method and system for preventing biofouling on ships using ultrasonic waves based on multi-dimensional environmental perception. Background Technology

[0002] Marine organism attachment is a long-standing and serious problem for ships. Barnacles, algae, shellfish, and other organisms attaching to the underwater parts of a ship significantly increase drag, leading to a substantial increase in fuel consumption and greenhouse gas emissions. Furthermore, biofouling can corrode the hull, clog seawater pipes, and severely impact ship performance and safety.

[0003] Currently, the mainstream technologies for preventing biofouling on ships can be divided into two main categories: chemical prevention and physical prevention. (1) Chemical antifouling coating technology: coating the hull surface with a coating containing toxic compounds (such as cuprous oxide) or low surface energy polymers. The former releases toxic substances into the ocean, causing long-term harm to the marine ecosystem, and has been strictly restricted by many countries and regions. The latter makes it difficult for attached organisms to adhere by reducing surface energy, which is environmentally friendly but costly and has limited durability. (2) Physical antifouling technology - ultrasonic antifouling system: by emitting high-frequency ultrasonic waves of 20~100kHz through a transducer installed at the bottom of the hull, the ultrasonic waves generate high-frequency vibrations at the microscale on the shell plate, and the ultrasonic waves induce transient cavitation at the solid-liquid interface. The local high pressure (up to 100MPa) and microjets generated when the cavitation collapses can effectively destroy the initial stage of biofouling of algal spores and barnacle larvae, thereby preventing the formation of biofilm from the source.

[0004] While existing ultrasonic anti-fouling systems are environmentally friendly, effective, inexpensive, and easy to deploy, they suffer from common technical drawbacks: high energy consumption (typically 2-10kW for commercial vessels) and a single, unintelligent operating strategy. The vast majority of systems operate in a continuously active mode. This strategy does not consider the actual environmental risks faced by the vessel, resulting in: (1) huge energy waste: in ocean voyages or cold waters where the risk of biofouling is extremely low, the system still operates at full power, causing unnecessary power consumption and increasing fuel consumption and carbon emissions; (2) shortened equipment lifespan: the continuous operation of ultrasonic transducers and drive circuits for extended periods accelerates their aging and damage, increasing maintenance costs; (3) potential environmental impact: existing research indicates that in some marine protected areas, continuous high-power ultrasonic waves may interfere with the health of sensitive marine mammals such as whales and dolphins.

[0005] Therefore, there is an urgent need in this field for an ultrasonic anti-fouling system that can intelligently adjust its working state according to actual risks in order to achieve the best balance between anti-fouling effect, energy efficiency and environmental protection. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of energy waste, short equipment life and lack of environmental adaptability in the prior art, and to provide a ship ultrasonic anti-biofouling optimization method and system based on multi-dimensional environmental perception, which can dynamically adjust ultrasonic working parameters according to multi-dimensional information such as the ship's geographical location, season, navigation status and specific water regulations.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An optimized method for preventing biofouling on ships using ultrasonic waves based on multi-dimensional environmental perception includes the following steps:

[0009] 1) Acquire real-time multidimensional status data of the ship, wherein the multidimensional status data includes at least geographic location data and speed data obtained through the Global Navigation Satellite System (GNSS), as well as time data;

[0010] 2) Based on the aforementioned geographical location data and time data, query the preset biofouling risk database to determine the basic biofouling risk level of the sea area where the vessel is located;

[0011] 3) The basic biofouling risk level is corrected based on the speed data to obtain the final biofouling risk level;

[0012] 4) Based on the final biofouling risk level, generate a set of adaptive operating parameters to control the ultrasonic antifouling system on the ship;

[0013] 5) Control the ultrasonic anti-adhesion system to operate according to the operating parameters.

[0014] The correction in step 3) includes reducing the bioattachment risk level when the speed is higher than a preset first speed threshold; and / or increasing the bioattachment risk level when the speed is lower than a preset second speed threshold.

[0015] The present invention further includes the following steps: determining whether the geographic location data is located within one or more preset special management areas; if the determination is yes, then setting the operating parameters to preset environmental protection mode parameters, wherein the environmental protection mode parameters correspond to reduced transmission power or a specific operating frequency range.

[0016] The operating parameters include at least one of the following: the transmission power and the duty cycle of the ultrasonic anti-adhesion system.

[0017] The biofouling risk database includes risk level data for different sea areas around the world in different seasons or months.

[0018] A shipboard ultrasonic bioattachment prevention system based on multi-dimensional environmental perception includes:

[0019] The data acquisition module is used to acquire the ship's real-time geographical location data, speed data, and time data;

[0020] Storage module for storing bioattachment risk database;

[0021] The central processing and control module, connected to the data acquisition module and the storage module, is used to: query the biofouling risk database based on the geographic location data and time data to determine the basic biofouling risk level, and correct the basic biofouling risk level based on the flight speed data to obtain the final biofouling risk level, and finally generate a set of adaptive working parameters based on the final biofouling risk level.

[0022] An ultrasonic drive and transducer module, connected to the central processing and control module, is used to generate ultrasonic waves according to the operating parameters.

[0023] The central processing and control module is also configured to determine whether the geographic location data is located within a preset special management area, and if the determination is yes, set the working parameters to preset environmental protection mode parameters.

[0024] The storage module is also configured to store a geofence database for special management areas.

[0025] The operating parameters include at least one of the following: transmit power and operating duty cycle.

[0026] Compared with the prior art, the beneficial effects achieved by the technical solution of this invention are:

[0027] 1. Easy integration and deployment, low maintenance cost: This invention cleverly utilizes the Global Navigation Satellite System (GNSS) modules already commonly equipped on ships, eliminating the need for additional complex dedicated sensors to achieve environmental awareness. This avoids complex and costly modifications to the hull, such as additional drilling and wiring, significantly reducing system installation costs and ship downtime. Furthermore, its core risk database can be updated remotely or locally via software, simplifying and accelerating maintenance and ensuring the long-term effectiveness of the system's strategies.

[0028] 2. Extreme energy saving: By automatically reducing power or going into hibernation under low-risk conditions, more than 50% (or even more) of energy consumption can be saved, directly reducing the ship's fuel costs and carbon emissions.

[0029] 3. Extend equipment lifespan: The intelligent intermittent working mode significantly reduces the cumulative working time of ultrasonic transducers and electronic components, thereby significantly extending the overall lifespan of the system and reducing maintenance and replacement costs.

[0030] 4. Precise and efficient protection: Concentrate limited energy on high-risk periods and areas to ensure the strongest protection when needed most, and guarantee better anti-fouling effect.

[0031] 5. Environmentally friendly: It is the first to introduce a "special management area" identification function, which can automatically switch to a low-interference environmental protection mode when entering ecologically sensitive areas, reflecting the responsibility for protecting marine ecology and conforming to the development trend of green shipping. Attached Figure Description

[0032] Figure 1 This is a structural block diagram of the system of the present invention.

[0033] Figure 2 This is a flowchart of the method of the present invention.

[0034] Figure 3 This is a schematic diagram of the marine organism attachment risk database in this invention. Detailed Implementation

[0035] To make the technical problems, technical solutions and beneficial effects of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] The method of the present invention includes the following steps:

[0037] 1) Multidimensional status data acquisition: Real-time acquisition of the ship's current status data, which includes at least: time, geographical location data and speed data acquired via GNSS.

[0038] 2) Bioattachment risk level assessment:

[0039] Based on the aforementioned time and geographical location data, a query and match are performed in a pre-set "Marine Organism Attachment Risk Database" to determine the basic risk level of the sea area where the vessel is currently located. This database currently divides sea areas into high, medium, and low risk zones according to the season.

[0040] The risk level is adjusted based on the speed data: when the speed exceeds a preset threshold (e.g., 12 knots), the risk of biofouling is significantly reduced due to the scouring effect of the high-speed water flow, and the risk level can be lowered. When the vessel is stationary or traveling at low speed, the risk level is adjusted accordingly.

[0041] Based on the geographical location data, determine whether the vessel has entered a preset special management area (such as a marine ecological protection area, a cetacean activity area, etc.) and mark it as a special status.

[0042] 3) Generate an adaptive control strategy: Based on the assessed risk level and status, generate a set of optimal operating parameters for the ultrasonic anti-adhesion system. These operating parameters include at least: transmit power, duty cycle (i.e., the ratio of on to off time), and / or operating mode (e.g., frequency sweep, frequency fixed).

[0043] High-risk level: "Powerful mode" that uses high power and high duty cycle (such as continuous operation or long-term operation).

[0044] Medium risk level: adopts the "standard mode" with medium power and medium duty cycle.

[0045] Low-risk level: Employs a "power-saving mode" with low power consumption and low duty cycle (such as intermittent short-term operation).

[0046] Extremely low risk (e.g., high-speed navigation): The system enters "sleep mode," maintaining only a standby state with minimal power consumption.

[0047] Special management areas: The system switches to a preset "environmentally friendly mode", such as significantly reducing transmission power or operating in a specific frequency range that has the least impact on marine mammals.

[0048] 4) Execution and control: The controller drives the ultrasonic transducer array to operate according to the set operating parameters based on the generated control strategy.

[0049] The present invention also provides a system for implementing the above method, the system comprising:

[0050] Data acquisition module: used to acquire time, location, and speed information.

[0051] Storage module: Used to store the "Marine Organism Attachment Risk Database" and the "Special Management Area Geographic Fence Database".

[0052] Central Processing and Control Module: The core of the system, connecting the data acquisition module and the storage module. It is responsible for executing risk assessment algorithms, generating adaptive control strategies, and outputting control signals.

[0053] Ultrasonic drive and transducer module: Receives signals from the central processing and control module, drives one or more ultrasonic transducers to operate according to specified power, duty cycle and mode.

[0054] The following are specific examples.

[0055] Example 1

[0056] Reference Figure 1 The system of the present invention includes:

[0057] GNSS antenna, used as a data acquisition module;

[0058] Memory, as a storage module;

[0059] Microprocessor (MCU) serves as the central processing and control module;

[0060] An ultrasonic drive circuit and one or more ultrasonic transducers together constitute an ultrasonic drive and transducer module. If there are multiple ultrasonic transducers, they can be configured as an ultrasonic transducer array.

[0061] The GNSS antenna is responsible for receiving satellite signals and resolving the time, the ship's latitude and longitude, and speed.

[0062] The memory stores a "Marine Organism Attachment Risk Database" (such as...). Figure 3 (as shown) and the "Special Management Area Geographic Fence Database". This risk database can be built based on historical data and oceanographic models (such as water temperature, salinity, chlorophyll concentration, etc.), dividing the sea area into different polygonal regions and assigning a risk index (e.g., 1~10) to each region under different seasons.

[0063] Example 2

[0064] Reference Figure 2 The method flow of the present invention is as follows:

[0065] Step S201: After the system starts, the microprocessor continuously acquires the ship's real-time position P (longitude, latitude), speed V, and current time D through the GNSS antenna.

[0066] Step S202: Microprocessor line risk assessment algorithm.

[0067] First, it uses location P and time D to search the risk database in the memory. For example, if the current location is Singapore Port (1°N, 103°E) and the date is July, the database query result is "high risk" (risk index 9).

[0068] Next, it determines whether the location is within a special management area. For example, if the system detects that the current location has entered the geofence of a cetacean sanctuary, an "environmental protection marker" will be set.

[0069] Then, the speed V is used for correction. If V > 12 knots, the risk index is significantly reduced. If V < 3 knots (e.g., berthing or anchoring), the risk index is increased to the maximum.

[0070] Step S203: The microprocessor generates a control strategy based on the final risk index and the "environmental protection flag".

[0071] If a ship is anchored in Singapore Port during the summer, the risk assessment is "high risk." The microprocessor generates a "powerful mode" instruction: controlling the ultrasonic drive circuit to perform a broadband frequency sweep at 95% of rated power and 100% duty cycle (continuously on), (e.g., between 20 and 100 kHz), to maximize the removal of attached organisms.

[0072] For example, if a ship is sailing in the North Atlantic at 20 knots during winter, the risk assessment is "low / very low risk". The microprocessor generates a "sleep mode" instruction: shutting down the ultrasonic drive circuit, the system maintains standby with only microampere current.

[0073] For example, a ship is sailing at 10 knots in a dolphin sanctuary. The risk assessment is "medium risk" and it has an "environmental protection flag". The microprocessor generates an "environmental protection mode" instruction: limit the power to 30%, use a specific narrowband frequency (e.g., 40~50kHz) that has less impact on dolphins, and set the duty cycle to 50% (1 minute of operation, 1 minute of pause).

[0074] Step S204: The microprocessor sends the generated digital control signal (such as a pulse width modulation signal) to the ultrasonic drive circuit, which converts it into high-frequency electrical energy to excite the ultrasonic transducer array installed on the inner shell plate of the hull, so that it works according to the instructions.

[0075] Through the above methods, this invention constructs an intelligent closed loop of perception-analysis-decision-execution, transforming the ultrasonic anti-attachment system from a fixed execution unit into an intelligent protection system capable of autonomously adapting to complex and ever-changing marine environments, achieving unprecedented energy-saving, long-life, high-efficiency, and environmentally friendly effects.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optimized method for preventing biofouling on ships using ultrasonic waves based on multi-dimensional environmental perception, characterized in that, Includes the following steps: 1) Acquire real-time multidimensional status data of the ship, wherein the multidimensional status data includes at least geographical location data and speed data obtained through the Global Navigation Satellite System, as well as time data; 2) Based on the aforementioned geographical location data and time data, query the preset biofouling risk database to determine the basic biofouling risk level of the sea area where the vessel is located; 3) The basic biofouling risk level is corrected based on the speed data to obtain the final biofouling risk level; 4) Based on the final biofouling risk level, generate a set of adaptive operating parameters to control the ultrasonic antifouling system on the ship; 5) Control the ultrasonic anti-adhesion system to operate according to the operating parameters.

2. The optimized method for anti-biofouling of ships based on multi-dimensional environmental perception as described in claim 1, characterized in that: The correction in step 3) includes reducing the bioattachment risk level when the speed data is higher than a preset first speed threshold; and / or increasing the bioattachment risk level when the speed data is lower than a preset second speed threshold.

3. The optimized method for anti-biofouling of ships based on multi-dimensional environmental perception as described in claim 1, characterized in that, It also includes the following steps: Determine whether the geographic location data is located within one or more preset special management areas; If the determination is yes, then the operating parameters are set to preset environmental protection mode parameters, which correspond to reduced transmission power or a specific operating frequency range.

4. The optimized method for anti-biofouling of ships based on multi-dimensional environmental perception as described in claim 1, characterized in that: The operating parameters include at least one of the following: the transmission power and the duty cycle of the ultrasonic anti-adhesion system.

5. The optimized method for anti-biofouling of ships based on multi-dimensional environmental perception as described in claim 1, characterized in that: The biofouling risk database includes risk level data for different sea areas around the world in different seasons or months.

6. A shipboard ultrasonic biofouling prevention system based on multi-dimensional environmental perception, characterized in that, include: The data acquisition module is used to acquire the ship's real-time geographical location data, speed data, and time data; Storage module for storing bioattachment risk database; The central processing and control module, connected to the data acquisition module and the storage module, is used to: query the biofouling risk database based on the geographic location data and time data to determine the basic biofouling risk level, and correct the basic biofouling risk level based on the flight speed data to obtain the final biofouling risk level, and finally generate a set of adaptive working parameters based on the final biofouling risk level. An ultrasonic drive and transducer module, connected to the central processing and control module, is used to generate ultrasonic waves according to the operating parameters.

7. A ship ultrasonic anti-bioattachment system based on multi-dimensional environmental perception as described in claim 6, characterized in that: The central processing and control module is also configured to determine whether the geographic location data is located within a preset special management area, and if the determination is yes, set the working parameters to preset environmental protection mode parameters.

8. A ship ultrasonic anti-bioattachment system based on multi-dimensional environmental perception as described in claim 6, characterized in that: The storage module is also configured to store a geofence database for special management areas.

9. A ship ultrasonic anti-bioattachment system based on multi-dimensional environmental perception as described in claim 6, characterized in that: The operating parameters include at least one of the following: transmit power and duty cycle.

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