249 results about "Waterline" patented technology

Embodiments include a buoyant wave energy converter. In an embodiment, the wave energy converter comprises an upper chamber having a first fluid reservoir and a first gas pocket, and a lower chamber having a second fluid reservoir and a second gas pocket. In an embodiment, an injection tube is between and fluidly coupled to the upper chamber and the lower chamber, where the injection tube is to impel a fluid from the second fluid reservoir into the first fluid reservoir when the upper chamber, the lower chamber and the injection tube oscillate about a waterline with the upper chamber adjacent to the waterline and the lower chamber submerged below the waterline and vertically beneath the upper chamber. An effluent tube is fluidly coupled to the upper chamber and the lower chamber, where the effluent tube is to return the fluid from the first fluid reservoir to the injection tube.

The invention relates to the technical field of ship construction, and discloses a ship annular block assembly method, which comprises the following steps of: drawing a corresponding ship body center line, a ship body longitudinal section line, a ship body rib detection line and a ship body waterline in an overall design drawing of a ship body according to the actual segmentation condition of the ship body; marking is correspondingly drawn on the built bottom section, the built broadside section and the built transverse bulkhead section in sequence as the basis; a bottom center line, a bottom rib detection line, a broadside longitudinal section line, a broadside rib detection line, a transverse bulkhead center line and a transverse bulkhead rib detection line are used for alignment and adjustment to replace data measurement of closure openings in the prior art so as to achieve alignment and butt joint of the closure openings. The problem that the alignment precision is poor due to the fact that a closing opening data measuring instrument cannot be arranged due to the narrow total assembly site is solved, the total assembly precision is guaranteed, and then the structural strength, water tightness and overall precision of a ship body are guaranteed.

The invention relates to a catamaran hull system to improve performance characteristics. The catamaran hull system comprises a hull having a bow and a stern, at least one transverse step, and a posi-flow inductor system. The posi-flow inductor system includes an interior inductor channel extending vertically up the hull and terminating above a waterline when the hull is at rest, and a posi-flow cover plate attached to the hull and covering the interior inductor channel to form a posi-flow duct. This catamaran hull system provides a solution that reduces suction, improves air flow to the transverse step, and enhances overall hull efficiency. Overall, it offers improved performance, stability, and handling characteristics for catamaran vessels.

The invention provides a joint design method and system for water flow estimation and ship waterline monitoring, and belongs to the technical field of ship monitoring, and the method comprises the following steps: firstly, a shore-based center deploys an underwater robot and plans a motion path according to the needs of a monitoring task, and builds a water gauge data set for model training; when the underwater robot arrives at the nearby area of the ship, the underwater robot measures the water flow speed and direction by using a Doppler velocimeter, and predicts a future water flow velocity field in combination with the trajectory information of the underwater robot; meanwhile, the underwater robot collects a waterline image through an airborne camera, pre-processes the waterline image, and calculates the credibility of the waterline image; and further, the underwater robot corrects the attitude in real time according to water flow velocity field prediction and waterline image credibility, and joint estimation of the water flow and the ship waterline is realized. According to the invention, water flow estimation and ship waterline monitoring are combined, and stable and efficient omnibearing ship waterline monitoring is realized through the underwater robot.

Disclosed is a method of reducing drag on the hull of the vessel by creating a Coanda flow on the hull by jetting a fluid onto the hull or surface continuous with hull. The fluid is jetted onto the hull or surface continuous with the hull at a location above or below the waterline of the vessel. The fluid is jetted from within a habitat positioned at least partially below the waterline, the habitat being vented to atmosphere. The habitat has an open end below the waterline. The Coanda flow extends entrains air below the waterline and adjacent to the hull. An air cavity or sheet is created by the jetted fluid. A system for reducing drag is also disclosed.

The invention discloses a ship water gauge identification method, system and equipment based on deep learning. The method comprises the following steps: acquiring a real-time image of a ship water gauge; preprocessing the real-time image of the ship water gauge; inputting the preprocessed real-time image of the ship water gauge into a pre-trained deep learning network model, and identifying the water line and the water gauge scale of the ship water gauge by using the deep learning network model to obtain the real-time draught state of the ship; and storing the identified water line and the water gauge scale of the ship water gauge in a database. According to the application, the deep learning network model is adopted, and the ship water gauge scale and the waterline can be accurately identified in a complex environment; through an image preprocessing technology, identification of the ship water gauge can adapt to various light conditions and complex sea conditions, stable identification in severe weather is guaranteed, and environmental adaptability is improved. In addition, historical data are stored through a cloud database, real-time query and data backtracking are supported, and traceability and accuracy are improved.

The invention provides a ship active stabilization control method and system, and relates to the field of ships. The ship active stabilization control system comprises a stabilization execution mechanism which comprises an upper platform constructed according to a ship body of a ship and a lower platform constructed according to multiple sets of water pressing plate execution mechanisms, and the multiple sets of water pressing plate execution mechanisms are arranged at any positions below waterlines of the two sides of the ship correspondingly; each water pressing plate executing mechanism comprises a water pressing plate assembly and a driving cylinder connected with the water pressing plate assembly; the data acquisition unit is configured to acquire ship body attitude and motion state information and environment data of the ship; the stabilization controller is configured to calculate and generate correction torque according to the parallel robot kinematic mechanics mechanism model, the ship posture and motion state information and the environment data, and distribute the correction torque to an execution instruction corresponding to each driving cylinder; and the driving cylinders drive the corresponding water pressing plate assemblies to execute water pressing movement or return movement according to the execution instructions.

The invention belongs to the technical field of ships, and discloses a hydroponic vegetable planting cabin for a ship and an ocean polar region ship, the hydroponic vegetable planting cabin for the ship comprises a cultivation system, a nutrient solution circulating system and an air conditioning system, the cultivation system comprises a cultivation pipeline for cultivating vegetables, the nutrient solution circulating system comprises a nutrient solution storage box, a circulating pipeline used for connecting the nutrient solution storage box with the cultivation pipeline and a pump used for driving the nutrient solution to flow, and the air conditioning system is used for controlling temperature and humidity. Vegetables are planted in a hydroponic mode, the requirement for fresh vegetables in long-period navigation is met, on one hand, the hydroponic vegetable planting cabin is arranged at the position close to the waterline of the ship body so that the hydroponic vegetable planting cabin can be kept in a stable state as much as possible, and on the other hand, the hydroponic vegetable planting cabin is arranged on the broadside of the ship body so that the waterline of the ship body can be kept stable. The porthole arranged on the broadside is used for ensuring the incidence of natural light, so that a stable and good cultivation environment with sufficient illumination is provided for the growth of vegetables.

An LED illuminated buoy system is disclosed, designed to enhance maritime safety and visibility. The system includes a weighted base with a conical shape for stability and a semi-translucent flotation part that extends above the waterline. The buoy houses an LED light source within the base, programmable for various colors and patterns. A sealing connection between the base and flotation part prevents water ingress. The system also features a communication interface for data transmission and remote operation. The buoy can be anchored securely and is adaptable for use as a lamp on land. The system's design allows for easy assembly and maintenance, with environmental resistance features integrated for durability. The buoy serves as a navigational aid, safety marker, and versatile lighting solution in aquatic environments.

A wave generating foil for use in a wave pool is disclosed. The foil has an inner surface that extends from a leading edge to a trailing edge, and the inner surface also extends below and above the water line of the wave pool. The inner surface faces the shore of the wave pool and is constructed to be propelled along a travel line that defines a shore side and an opposite side. The inner surface has (1) a first section that extends away from the leading edge and runs substantially parallel to the travel line; and (2) a second section that extends away from the first section towards the opposite side.

The invention relates to the technical field of ship draft measurement, and provides a ship draft dynamic detection method and system based on multi-modal fusion. The method comprises the following steps: acquiring a multi-modal ship image and / or video to obtain a ship visible light image and a ship near-infrared image; performing feature level fusion on the ship visible light image and the ship near-infrared image to obtain a fused image; performing key region detection on the fused image by using a pre-trained waterline detection model adopting YOLOv11, and marking and / or cutting a key waterline region in the fused image to obtain a target image; a SegFormer network added with an NAM attention mechanism is used for carrying out ship body and water body segmentation on the target image subjected to image correction, and ship body character features and waterline pixel features are obtained through edge detection; and constructing a visual ranging model containing character coordinates based on the hull character features, and inputting the waterline pixel features into the visual ranging model to obtain a ship draft detection result.

The invention relates to a ship behavior image recognition method based on an overwater electronic bayonet, and relates to the technical field of image recognition, and the method comprises the steps: collecting a multi-angle image of a target ship through an overwater electronic bayonet snapshot system, and constructing a three-dimensional model; matching a fixed early warning water line by using a ship type database, and correcting and outputting an adaptive early warning water line in combination with the real-time navigation interference information; analyzing the ship three-dimensional model sequence of the preset time zone to obtain a real-time water level line and a driving posture; fusing the ship navigation data and the ship driving attitude to optimize the real-time water line to obtain a corrected water line; if the corrected water level exceeds the adaptive early warning water level, overload early warning is carried out. The cargo ship overload identification method solves the problems that in a traditional system, a fixed waterline is used, environmental factor changes are not considered, misinformation is likely to happen, a traditional image method is influenced by illumination, shielding and the like, waterline identification is unstable, and false detection and missing detection are likely to happen, and the accuracy and reliability of cargo ship overload identification are improved.

Embodiments include a buoyant wave energy converter. In an embodiment, the wave energy converter comprises an upper chamber having a first fluid reservoir and a first gas pocket, and a lower chamber having a second fluid reservoir and a second gas pocket. In an embodiment, an injection tube is between and fluidly coupled to the upper chamber and the lower chamber, where the injection tube is to impel a fluid from the second fluid reservoir into the first fluid reservoir when the upper chamber, the lower chamber and the injection tube oscillate about a waterline with the upper chamber adjacent to the waterline and the lower chamber submerged below the waterline and vertically beneath the upper chamber. An effluent tube is fluidly coupled to the upper chamber and the lower chamber, where the effluent tube is to return the fluid from the first fluid reservoir to the injection tube.

The utility model relates to the technical field of ship design and manufacture, and discloses a hidden laying system of a mother ship of a deep-sea unmanned submersible vehicle, which comprises a servicing room, a hoisting room, a dock cabin and a moon pool, the servicing room is arranged in a main deck layer of the mother ship, the hoisting room is adjacent to the servicing room, a crane is arranged at the top of the hoisting room, a hoisting opening is arranged at the bottom of the hoisting room, and the dock cabin is arranged in the moon pool. The dock cabin is located below the hoisting room, the bottom of the dock cabin is lower than a waterline, the dock cabin is provided with a dock cabin hatch, the dock cabin hatch is provided with an upward moving type dock cabin ship side cabin door, the dock cabin ship side cabin door is provided with a dock cabin ship side cabin door transmission mechanism, a dock cabin arranging and loading system is further arranged in the dock cabin, the moon pool is located below the dock cabin, and a moon pool bottom cover is arranged at the bottom of the moon pool. And a moon pool bottom cover transmission mechanism is arranged on the moon pool bottom cover. According to the utility model, the concealed laying requirements under severe sea conditions and various navigation working conditions can be met, the safety of laying operation is improved, and the influence of external factors on laying operation is reduced.

The present invention is a marine current turbine featuring a downstream rotor, a faired spar, a deckhouse at the waterline, and a ballasting and mooring arrangement to ensure the center of buoyancy is above the center of gravity to provide a stable platform and ample rotor torque reaction. The faired spar minimizes the wake deficit ingested by the rotor and reduces turbulence and drag on the turbine. The deckhouse provides buoyancy to react to gravitational forces and the downward tension component supplied by the mooring system during maximum platform and rotor drag conditions and reserve buoyancy if a portion of the platform becomes flooded. The mooring arrangement preferably forms a bridle to provide yaw stability.

Invention relates to the paddle-wheel propelling mechanisms, especially to the steerable and retractable paddle-wheel mechanisms for propelling boats. The paddle-wheel propulsion and steering mechanism comprises a frame structure for securing the mechanism to the boat; a propulsion mechanism for propulsion of the boat; a paddle-wheel upward and downward moving mechanism for movement of the paddle-wheel relative to a waterline of the boat; and a steering mechanism for steering of the boat.

The invention discloses a ship body ice force calculation method for ship control motion simulation in a layer ice area, and relates to the field of ship control motion simulation, and the method comprises the steps: dividing an ice raft area into a plurality of ice units, and determining the ice unit position information of each ice unit at the current moment; according to the ice unit position information and the ship body waterline position information, determining each contact ice unit in contact with the ship body waterline; determining the contact length between any contact ice unit and the ship body waterline and the ship ice contact speed by combining the ship navigation state parameters; calculating the local acting force of the contact ice unit on the ship body by using an extreme value static ice force formula in which a speed correction term is introduced; and superposing the local acting force of each ice contact unit on the ship body to obtain the ship body ice force at the current moment. According to the method, the ship body ice force can be accurately calculated when special control operations such as backing and large-drift-angle maneuvering of the ship in the layer ice area are simulated, and the accuracy and reliability of control motion simulation of the ship in the layer ice area are effectively improved.

The invention discloses a variable-structure unmanned ship and a simulation verification method, belongs to the field of water surface robots, and aims to solve the problem that an existing unmanned ship cannot realize cross-medium sailing to cope with complex sea conditions. Two foldable wings are arranged on the two sides of a main boat body respectively, each foldable wing can be turned over up and down, an underwater propeller is arranged on each foldable wing, and the underwater propellers are close to wing tips of the foldable wings and used for water surface and underwater sailing of the variable-structure unmanned boat; the air propeller is arranged at the stern of the main boat body, can turn over up and down and is used for sailing the variable-structure unmanned boat in the air or on the water surface; the number of the sliding wheels is three, and the three sliding wheels are arranged below the main boat body, can be retracted into the main boat body and are used for sliding, taking off and landing of the variable-structure unmanned boat on the land. The variable-structure unmanned ship can be transformed into a ground-effect wing ship mode, a small-waterplane-area triple-hulled ship mode or an underwater glider mode under the overturning of the foldable wings and the air propellers. The method is mainly used for task execution under complex sea conditions.

The invention belongs to the technical field of ship draft detection, and provides a ship draft real-time detection system which comprises the following steps: establishing a three-dimensional dynamic coordinate system, and updating a water surface reference surface in combination with real-time water level data; calculating water level variation of adjacent frames and compensating a point cloud Z axis; a pure ship body point cloud is separated in combination with a water surface datum plane, ship body reflectivity and a region growing algorithm; fitting a deck plane of the pure ship body point cloud, performing edge detection to extract ship board features, and correcting a side board feature surface; converting the pixel coordinates of the water surface reference surface and superposing the auxiliary lines; positioning a waterline, converting a bow / middle / tail waterline coordinate to a three-dimensional dynamic coordinate system, and calculating an initial draft; the deck Z-axis average coordinate is extracted, and the bow / middle / tail freeboard height is calculated in combination with the water surface datum plane coordinate; the theoretical draft is deduced in combination with the ship type depth, the theoretical draft is compared with the initial draft, the final draft is output, and the ship draft detection precision in the complex water level change environment is improved.

The invention discloses a ship second-order wave force numerical forecasting method in a maneuvering state, and the method comprises the following steps: S01, reading calculation parameters including ship body grids, navigational speed and frequency, extracting ship body waterline information based on discrete grids, and calculating object plane normal vector n and m items; s02, solving a flow velocity potential by using a high-order analysis moving pulsation source method; s03, calculating a hydrodynamic coefficient, a wave exciting force and a motion response; and S04, forecasting the second-order wave force of the ship in the maneuvering state. By means of the method, reasonable, efficient and practical numerical forecasting can be provided for longitudinal, transverse and yawing second-order force (moment) caused by waves in maneuvering states such as forward / oblique navigation of the ship.

A hydrofoil arrangement for a boat includes a fastening device, first and second rigid elements, and a main hydrofoil. The fastening device is fastened on an outside of a hull below a waterline of the resting boat. The first rigid element pivots in a first pivot plane into and out of engagement with the hull, vertical and parallel to a forward direction. The second rigid element is connected to the first rigid element and extends at an angle to the first rigid element so that a second end of the second rigid element is at a vertical distance from the hull. The main hydrofoil is fastened to the second end of the second rigid element. The first rigid element can be pivoted downwards and backwards, and thereafter upwards and further backwards, to a position where its second end is arranged stern of the hull. A method is also described.

The invention provides a ship draught load line identification method based on machine vision, which comprises the following steps of: (1) acquiring a ship shot image, (2) preprocessing the obtained images of a prow, a midship and a stern water gauge areas, expanding the midship water gauge areas, and obtaining the position of a load line through preprocessing and Hough circle detection; (3) carrying out water gauge character recognition on the pre-processed water gauge area image; (4) inputting the ship image into a key point detection model to detect ship waterline key points; (5) based on the ship waterline key points, performing line fitting by adopting a least square method to obtain a ship waterline; (6) respectively comparing ship waterlines of the bow, the middle and the stern with ship load identification positions, if the ship waterlines are higher than the ship load identification, judging that the ship is overloaded, and if the ship waterlines are lower than the load line, judging that the ship is not overloaded; (7) if it is judged that the ship is overloaded, draught values of a prow water gauge, a midship water gauge and a stern water gauge of the overloaded ship are calculated respectively.

The invention provides totally-closed connecting paint for a ship body below a ship waterline and a preparation method of the totally-closed connecting paint. The method comprises the following steps: A1, mixing glass fibers and a base material; a2, hydroxyethyl cellulose ether, propylene glycol, n-butyl alcohol and m-xylene are added; a3, adding titanium dioxide and iron oxide red; a4, adding the silicon resin emulsion and the common emulsion; a5, adding the polydimethylsiloxane and the thickening agent; and A6, finally adding the defoaming agent. And each step has a specific proportion and a specific mixing condition, so that the quality and the performance of the coating are ensured. The totally-closed connecting paint can reduce chemical corrosion and electrochemical corrosion of a ship body and prolong the service life of a ship.

The invention relates to the field of port construction, in particular to a safety protection device for port construction, which comprises a wharf platform, a vertical plate, an R-shaped fixing column and a sleeve rod, a sliding block and an air bag floating block are arranged on the vertical plate, a connecting rod is arranged on the air bag floating block, and a sliding rod is arranged on the sliding block; a sheath is arranged in the sliding block, a fixing ring is arranged on one side of the sheath, rubber balls are arranged in the sheath and the fixing ring, a buffering mechanism is arranged in the sliding block, and a wave-proof plate is arranged on the wharf platform. The buoyancy of water can enable the water bag floating block to drive the sliding block to slide upwards through the connecting rod, then the height of the protective sleeve can be automatically adjusted along with the rising tide amplitude, the rubber ball is located above the waterline of the ship body all the time, the ship body makes contact with the rubber ball firstly when the ship stops, and inertia of the ship is buffered through the buffering mechanism; when the ship body shakes, friction of the ship body is reduced through rotation of the rubber balls, the ship body and the port platform can be protected, the sleeve rods can prevent workers from falling, and therefore the safety of port construction is greatly improved.

The invention relates to the technical field of offshore wind power generation, and discloses a clamped floating type offshore wind power foundation platform which comprises a floating structure and a clamped structure. The fixed supporting structure is located below the floating structure and arranged underwater in a submerged mode, and the fixed supporting structure is suitable for providing bearing capacity and anti-overturning capacity for the floating structure. The floating structure floats on the water surface so as to be suitable for installing and placing wind power equipment, and the anti-tilting capacity can be improved through the water plane and the gravity center-buoyancy center height difference. The fixed supporting structure limits the horizontal displacement of the floating structure, adjusts the overall gravity center of the offshore wind power foundation and provides the anti-overturning capacity. The clamped floating type offshore wind power foundation platform has multiple composite stability sources, on the premise that the foundation stability is guaranteed, anchor chain mooring structures are reduced, then the occupied area is reduced, the composite stability design is adopted, the situation that the structure size is too large due to a single stability source is avoided, steel materials are further reduced, the weight of the structure is reduced, and the cost is reduced. Therefore, the overall cost and the cost per kilowatt-hour are greatly reduced.

The invention relates to the field of ocean engineering equipment, and discloses a device and method for water surface close-range active auxiliary recovery of an unmanned autonomous vehicle, and the device comprises a blocking frame, a power assembly, an oscillation stopping hook module, a hoisting hook module, a suction device, a release device and a buoyancy material; the buoyancy material is fixed on the blocking frame and is used for providing static buoyancy; the power assembly is installed on the lower supporting structure of the blocking frame and located below the waterline. The power assembly is arranged below the blocking frame, so that the recovery device is endowed with independent water surface maneuvering capacity. Compared with a passive recovery mode which only depends on mother ship maneuvering or UUV autonomous homing, the device can actively approach the floating UUV by utilizing thrust and correct course deviation, and can realize axis alignment with the UUV even in a non-still water environment with stormy wave interference, so that the flexibility of recovery operation and the capture success rate are improved.

The invention relates to a ship (10) comprising a hull (110, 115) and at least one motorised propulsion means which rotates at least one propeller (180), the ship comprising at least one air duct (145, 150) comprising at least two openings including an air intake opening (140) positioned above the waterline (190) of the ship and an air outlet opening (160, 161) positioned below the waterline of the ship and configured to direct the air flow under the hull so as to reduce the friction of the hull on the water during navigation, the respective positions of each air outlet and of each propeller on the hull being selected so that the air flow(s) directed under the hull of the ship are axially offset with respect to each propeller so as not to hinder the operation of the propellers.

The invention discloses a ship auxiliary propulsion device which comprises an isolation body, the isolation body is fixed to the position, in front of a wind resistance generating object, of a ship in use, and the wind resistance generating object comprises a ship body located above a waterline, a superstructure located above a deck and cargoes on the deck. When the ship advances, the isolation body is used for isolating at least part of airflow blowing to the object generating wind resistance, the isolation body is provided with a windward side directly facing the airflow, the windward side is in an uphill gradient mode in the direction from front to back, and a wing-shaped body arranged in an overhead mode is fixed to the position corresponding to the upper portion of the windward side. The device is easy to install, free of movable operation parts, capable of reducing wind resistance of the ship and generating horizontal component force for pushing the ship to advance, especially suitable for the container ship, and the whole device can better reduce oil consumption, reduce emission, achieve energy conservation and emission reduction and assist in achieving green shipping.

The invention relates to the technical field of floating platform verification, and specifically discloses a method and system for optimizing the stability of a floating platform based on a boundary element method and coordinates, comprising: obtaining the coordinates of discrete points of the floating platform and the coordinates of the center of gravity; setting the step value of the inclination angle of the floating platform and the wind direction; calculating the displacement volume of the floating platform in an initial state; performing coordinate transformation on the discrete points and the coordinates of the center of gravity of the floating platform according to the step value of the inclination angle of the floating platform and the wind direction, and respectively calculating the displacement volume, waterline area, center of gravity coordinates and center of buoyancy coordinates of the floating platform under different inclination angles and wind directions, so as to determine the position of the waterplane after inclination; performing coordinate transformation on the discrete point coordinates and the center of gravity of the floating platform according to the position of the waterplane, and calculating the transformed waterline area, center of gravity coordinates and center of buoyancy coordinates; and repeatedly calculating the stability lever arm of the floating platform by using the difference between the transformed center of gravity abscissa coordinates and the center of buoyancy abscissa coordinates until the stability lever arm is less than 0.

Novel ships A, B, C1 and C2 are provided. A, propeller propelling systems 3, 4 and 5 are arranged below waterlines on the two sides of a prow; b, arranging ice surface sliding plates on two sides of the ship body, and arranging a high-power electric fan above the waterline of the stern; c1, front, middle and rear sliding plates are arranged on the two sides of the ship body, and a plurality of sets of 50-meter trailer locking sliding plates are arranged on the high-speed rail. And C2, front, middle and rear sections of sliding plates are arranged on two sides of the ship body, a plurality of groups of electric high-speed rail wheels are arranged below the sliding plates, and the track gauge of each group of electric high-speed rail is 1.435 m. The method is comprehensively discussed in the specification of the specific development implementation scheme in the theoretical and technical fields.