61 results about "Waterline" patented technology

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 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.

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 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.

This invention discloses a monitoring method for a box-shaped keel on an ice-covered vessel, comprising the following steps: marking three spaced monitoring positions on the box-shaped keel, one of which is located at the heavy-load waterline at the bow; installing at least one monitoring component at each of the three monitoring positions; using a vibration sensor on the monitoring component to detect the vibration amplitude of the box-shaped keel and transmitting the detected vibration amplitude to a processor; and using a temperature sensor to detect the temperature of the box-shaped keel and transmitting the detected temperature to the processor; when the vibration amplitude detected by any vibration sensor exceeds a set amplitude, or when the temperature detected by any temperature sensor continuously rises to a set temperature within a set time period; reducing the vessel's speed from the current speed to a safe speed; and / or changing the vessel's course from the current course to a safe course. This method protects the scientific research equipment inside the box-shaped keel by monitoring its vibration amplitude and temperature changes.

The invention provides a device for offshore oil jacket large steel pile waterline marking construction, and relates to the technical field of offshore oil engineering equipment.The device comprises a frame and a sample plate lifting device arranged at the upper end of the frame, a construction platform is arranged on the side portion of the frame, and a climbing ladder is connected to the bottom of the construction platform; the frame comprises two cross beams symmetrically arranged at the bottom, stand columns are symmetrically arranged at the two ends of the cross beams, supporting pieces are arranged at the tops of the stand columns, a sample plate lifting device is arranged on the supporting pieces, and a walking steering mechanism is further arranged at the bottom of the frame. The walking steering mechanism is controlled by the control assembly to drive the frame to move, the sample plate can rotate along with a winding drum of the winding device through the sample plate lifting device to achieve lifting motion, the problem of waterline marking construction of the large steel pile of the offshore oil jacket is effectively solved, and the efficiency and precision of waterline marking construction are remarkably improved.

The application discloses a ship bow, which comprises a forward inclined part and a bulbous bow part; the bulbous bow part is connected to the lower part of the forward inclined part; the forward inclined part is located above the waterline, and the bulbous bow part is located below the waterline; the intersection line of the outer surface of the ship bow formed by the forward inclined part and the bulbous bow part and the ship centerline is a straight line segment and an arc line segment, the arc line segment is connected to the straight line segment, the straight line segment is located above the arc line segment, the straight line segment is distributed obliquely downward towards the stern, and the arc line segment extends towards the stern. The application solves the problem that the traditional line type cannot simultaneously consider the resistance performance under the two working conditions of ice area navigation and ice-free open water navigation, and effectively improves the comprehensive energy consumption level of the ship on the whole operation route.

The invention relates to a monohull semi-submersible drone (1) comprising: a submerged hull (20), below a waterline plane (P2); a bow float mast (30), projecting from the submerged hull (20) and ending with an upper end (32) that is arranged above the waterline plane (P2) and that is arranged on the bow side (21) with respect to a front plane of the bow (P21) at one third of a bow-to-stern distance (d21); a stern float mast (40), projecting from the submerged hull (20), arranged between the bow float mast (30) and the stern (22) and comprising an upper end (42) arranged above the waterline plane (P2); and a marine propulsor (60T), arranged below the waterline plane (P2).

A safety device for an ammonia tank on board a ship with a hull, the safety device being characterized in that there are at least two separate pipelines, arranged for ammonia gas, each comprising an inlet connected to the ammonia tank and each comprising a first hull outlet arranged below a waterline on the hull, such that the hull outlets, in any loading condition of the ship, at least open below the waterline, into the surrounding seawater outside the hull, and wherein each pipeline further comprises at least one respective safety valve arranged in the vicinity of the inlets and wherein each safety valve is arranged to change from a closed to an open position at a defined overpressure in the ammonia tank, such that in a fully or partially open position of the safety valves, the ammonia gas will be led from the ammonia tank via the pipelines and out via the first hull outlets to the surrounding seawater around the hull and dissolved into aqueous ammonia, such that ammonia gas is not released into the atmosphere around the ship.

The invention discloses a methanol fuel cabin arranged in a container cargo hold, which is matched with the cargo hold of a ship and comprises a methanol fuel cabin, the top boundary of the methanol fuel cabin is arranged below the minimum ballast water line of the ship, and an outer bottom plate of the ship is directly used as the bottom boundary; a methanol fuel cabin main body structure which is always surrounded by seawater or is lower than the sea surface is formed, when the methanol fuel cabin leaks, methanol fuel can be directly diffused to the seawater and dissolved in the seawater, the potential internal leakage accumulation risk is converted into controllable external diffusion so as to improve the safety, meanwhile, an isolation void cabin is not arranged at the bottom of the methanol fuel cabin, and the reliability of the methanol fuel cabin is improved. Structural compactness and efficient space utilization are achieved, the capacity of the methanol fuel cabin is increased, and the overall weight of a ship can be reduced.

The invention relates to the technical field of shipping monitoring, in particular to a ship draft detection method based on cell dichotomy, which comprises the following steps of: firstly, capturing a photo of a ship entering a ship through ship capturing systems on two sides of a channel, acquiring a ship name by means of a YOLOv8 target detection network, and inquiring a ship database to obtain identity information such as the depth of the ship; constructing a draught mark detection data set, and training a YOLOv8 network to detect and position a draught mark area; in a waterline detection and draught scale identification link, dividing a draught marking area feature map into cells according to columns, regarding waterline detection as a dichotomy task, and optimizing waterline position selection by utilizing a probability formula and a loss function; and finally, estimating the draft of the ship with the recognizable draft scale according to the waterline and the draft proportion. The invention aims to solve the problems that the traditional ship draft detection method is low in precision and poor in efficiency, and the existing automatic detection is insufficient in adaptability in a complex environment and is difficult to accurately detect the draft of various ships.

A marine propulsion system includes wings with a hydrofoil shaped geometry arranged for mounting on opposite side sections of a vessel comprising at least one hull adjacent the transom. Each wing includes a first section extending downwards along the side of the hull and at least partially below the waterline in its operative position. Each wing includes a second section extending towards the central longitudinal axis of the hull in its operative position. The second section each wing is arranged to support at least one propulsor. The first section of each wing is mounted rotatable about a vertical axis.

The present application belongs to the field of ship hydrodynamics and motion prediction, and in particular to a device and method for predicting the hydrodynamics and motion of a ship coupled with ice, which first derives a Green function that satisfies the boundary conditions of the ice layer and the free surface, as well as all other conditions except the surface condition of the ship, and through the Green function, the differential equation of the velocity potential is converted into a boundary integral equation on the surface of the ship only, which introduces an extended surface at the waterline of the ship body to eliminate the influence of irregular wave frequencies; an asymptotic solution formula of the Green function is analytically derived, thereby establishing an approximate and effective solution program for the coupled interaction of the ship / wave / ice layer, and numerically calculating the results of the added mass, damping coefficient and wave exciting force of the ship body; through the method, the interaction mechanism of the water wave / ship / ice layer under different parameter characteristics can be deeply understood, and theoretical support is provided for the hydrodynamic problems, motion prediction and rational design of polar ships.

The present application relates to the field of ship modification, more particularly, to a method for platform new-added bow side propulsion technology, comprising the following steps: step 1, measuring the line type of the new-added bow side propulsion modification area of the ship body, and drawing the frame measurement line and the longitudinal section measurement line of the ship body; step 2, according to the original ship type value table of the ship body, smoothing the original ship line type to obtain the frame line of the original ship line type, the longitudinal section line of the original ship line type and the waterline of the original ship line type, and inserting the frame measurement line and the longitudinal section measurement line of step 1 into the frame line of the original ship line type, the longitudinal section line of the original ship line type and the waterline of the original ship line type, correcting the original ship line type to obtain the line type of the new-added bow side propulsion modification area, as the line type basis of the segmented construction drawing; step 3, according to the corrected line type, the structural size measurement data of the new-added bow side propulsion modification area and the design detail drawing, drawing the bow side propulsion construction structural drawing to ensure that the segmented structural size of the new-added bow side propulsion is aligned with the smoothing and structure of the original ship line type.

The invention relates to a retractable mounting bracket for ship side underwater environment measurement and a use method thereof, the mounting bracket comprises a bottom plate, a transverse support shaft, a fixed plate, a vertical bracket, a transverse support leg and a buffer piece, and the bottom plate is fixed on a deck surface at the edge of a ship side; one end of the transverse supporting shaft is fixed on the bottom plate; the fixed plate is fixed in the middle of the support shaft; the vertical support movably penetrates through the transverse supporting shaft, and the top of the vertical support can be fixedly connected with the fixing plate. The transverse supporting leg is installed on the side, close to the ship body, of the waterline position of the vertical support. The buffer piece is mounted on the position of the vertical bracket on the waterline; wherein the underwater environment measurement sensor is fixed at the bottom end of the vertical bracket; a plurality of pairs of rings are arranged on the side wall of the bottom of the vertical support, cables for fixing are bound through the rings, and the other ends of the cables are connected with the ship body. According to the device, a rotary recovery mode is applied structurally, so that the convenience of the recovery and release process is improved; and the device can be repeatedly used, so that the use cost is greatly reduced.

The invention relates to a control system and method for preventing cooling water of a diesel engine from sucking air and a catamaran, and belongs to the technical field of catamaran ships. A high-level water replenishing tank is arranged on an upper-layer building and connected to a diesel engine cooling pipeline; and the monitoring unit is matched with a left-and-right side communicating pipeline, so that reliable water injection before starting, water replenishing during abnormal operation and balance of water tanks on two sides are realized. The air suction risk of an overhead diesel engine is avoided, the operation stability under the complex sea condition is remarkably improved, maintenance is convenient, and the air suction device is particularly suitable for a small waterplane area catamaran.

This invention provides a multimodal method and electronic device for detecting ship draft, which acquires point cloud data and image data; identifies scale lines and waterlines in the image data based on the point cloud data and image data, and calculates a first draft value based on the scale lines and waterlines; identifies the ship's target feature height and water surface height in the point cloud data based on the point cloud data and image data, and calculates a second draft value based on the ship's target feature height and water surface height; evaluates the confidence level of the first draft value to obtain a confidence weight; and obtains the draft result based on the confidence weight, the first draft value, and the second draft value. This method achieves both obtaining the draft value through direct reading from the draft gauge using image data as the primary source and obtaining the draft value through ship height calculation using point cloud data as the primary source, followed by weighted calculations to obtain the final draft value, thus yielding an accurate ship draft value.

The ship steering control mechanism and control method of the present application relate to a ship power generation and steering method and mechanism, which is provided with a water flow channel on the hull below the waterline, and a side thrust steering device is fixed in the water flow channel; a wire control device is arranged in the engine room control room of the hull; a retractable winch is arranged on the deck of the hull, a mooring line is fixed on the retractable winch, and a high-altitude wind power generation device is connected to the other end of the mooring line, and the power transmission line of the high-altitude wind power generation device is connected with the power system of the hull. The side thrust steering device can provide side thrust for the steering of the hull, which can control the steering when the hull approaches the shore to replace the tugboat and improve the efficiency, and can overcome the side stress generated when the high-altitude wind power generation device works to realize the control of the sailing posture of the hull, which is good in flexibility, greatly reduces the shipping cost, is not affected by the natural environment, and will not cause the situation of ship position deviation and impact on the wharf; the high-altitude wind power generation device can provide power for the power system and energy storage system of the hull, and can save a part of energy.

The submitted patent, "Devices for Utilizing Energy Components in the Relative Motion of Bodies in Liquid Media During Displacement by Flow Dividers," demonstrates significant, energy-efficient potential. Observations of ships on the Main-Danube Canal led to energy analyses and the applicant's own experiments. The failures of these experiments, coupled with limited resources, resulted in a feasible experimental setup and an evaluation strategy that enabled the analysis of the results. These experiments demonstrated the possibility of energy recovery through the utilization or reduction of displacement energy. The experiments described in Section 1 of the patent description show that a flow divider positioned in front of the ship, both above and below the waterline, can recover or reduce a portion of the displacement energy.The use of flow dividers can certainly also positively influence wave losses, which have always been a focus of attention. The following observation is perhaps warranted here. Approximately 90,000 very large ships are sailing the world's oceans. The cruise ship "AIDA" consumes 140 tons of heavy fuel oil daily. This means that, with the application of a well-adapted design (19.8%), a daily profit of approximately €5,800 could be achieved.

Semi-submersible drone Semi-submersible drone (1) monohull comprising: a submersible hull (20), below a waterline plane (P2); a bow float mast (30), projecting from the submersible hull (20); terminating in an upper end (32) arranged above the waterline plane (P2) and arranged on the bow side (21) with respect to a front bow plane (P21) at one-third of a bow-stern distance (d21); a stern float mast (40), projecting from the submersible hull (20), arranged between the bow float mast (30) and the stern (22) and comprising an upper end (42) arranged above the waterline plane (P2); and a naval propulsion unit (60T), arranged below the waterline plane (P2). Figure for the abbreviation: Figure 2

According to some embodiments of the present disclosure, a low-profile cargo vessel includes a cargo bed that is open to the stern, an engine compartment forward of the cargo bed, a fairing, and buoyancy volume. The cargo bed includes a cargo bed floor and first and second cargo bed walls on opposite sides of cargo bed floor. The cargo bed, interior portions of the first and second cargo bed walls, and interior portions of cargo bed floor are free-flooding to sea water. The fairing is configured to provide a hydrodynamic bow structure ahead of the engine compartment. The buoyancy volume is inside upper portions of the first and second cargo bed walls spaced apart from cargo bed floor so that the low-profile cargo vessel floats with a waterline above the cargo bed floor and more than half way up the first and second cargo bed walls.

The application provides a ship near-field iceberg fusion recognition method and system, relates to the technical field of image processing, and particularly relates to iceberg detection and risk assessment in a multi-ice region environment. The ship near-field iceberg fusion recognition method specifically comprises the following steps: acquiring multi-view image data of an overwater part of a target iceberg; based on the multi-view image data, reconstructing a three-dimensional surface model of the overwater part of the target iceberg and determining a waterline where the iceberg and the water body meet; analyzing image information on the three-dimensional surface model and identifying the spatial distribution of preset risk features; based on the spatial distribution of the risk features, generating a three-dimensional probability field of an underwater part of the target iceberg; acquiring current draft data of at least one ship; and combining the three-dimensional probability field and the current draft data to generate an underwater three-dimensional danger weight map, wherein the weight map at least identifies an underwater region that has a collision risk relative to the current draft.

This invention provides a cleaning device and method for marine buoys, belonging to the fields of marine engineering equipment and marine navigation marks. It is used to clean attached marine organisms and dirt near the waterline and underwater parts of the buoy, and to collect wastewater and debris. It includes a base, a splash guard, a bonding section, and a rinsing section. The base includes an outer ring base, an inner ring base, and a bottom plate, with a filter screen on top. The splash guard includes a top frame and sliding doors, with multiple sliding doors slidably disposed between the outer ring base and the top frame. The bonding section is located on the inner ring base and includes a shrink film and a retraction mechanism. The outer circle of the shrink film is fixed to the upper side of the filter screen area, and the inner circle of the shrink film is connected to the retraction mechanism. When the retraction mechanism operates, it adheres the shrink film to the buoy shell. The rinsing section includes a spray gun to rinse the buoy surface. This device, combined with this method, achieves adaptation and cleaning of the buoy shell, separates wastewater and waste without damaging the coating, improves the convenience and efficiency of buoy cleaning, and is also environmentally friendly.

Disclosed is a method and system to provide protection for maritime vessels from multiple threat types including shoulder launched rocket propelled threats, ballistic (howitzer), and larger scale missile systems. According to an exemplary embodiment, the protection system is based on the ballistic launch (from the protected vessel) of an explosive charge(s) aimed ˜5 meters away from the vessel and ˜1 meter beneath the waterline followed by detonation to enable the formation of a water wall. Through the formation of a water wall, incident threats can be initiated (piezo fuze) and passivated through dynamic interaction with the water formation. In addition, the upward velocity of the water wall can enable an upwards rotation of the incident threat changing the orientation of the warhead jet formation (for shape charge warheads) above the vessel.

The invention discloses an ice region floating platform safety operation management method, and relates to the technical field of ice region floating platform safety operation, and the method comprises the steps: determining an operation point region, a near-field region and a far-field region of a floating platform based on environment parameters, structure parameters and operation parameters of the floating platform, and performance parameters of an icebreaking operation and maintenance ship; the structure of the platform near the waterline is optimized in the operation point area; carrying out icebreaking operation in a near-field area by utilizing an icebreaking operation and maintenance ship; an ice-resistant device is arranged in a far-field area in advance to pre-crush large-scale sea ice. According to the method, the operation safety of the floating platform in the ice region is guaranteed in a multi-means cooperative ice breaking mode, and the full-time and full-domain safe operation capacity of the floating platform in the cold region is improved.

The present application relates to a kind of ship design waterline above ballast tank pressure discharge system and design method, ballast tank in the system is located above ship design waterline, ballast tank is connected fire or other water injection pipeline system, gravity discharge pipeline system etc., for realizing the pressure discharge mode of fire or other water injection ballast, gravity discharge.By setting up ballast tank arrangement position reasonably, borrow fire or other equipment and pipeline, thereby solve the problem of high equipment configuration demand and pipeline arrangement difficulty caused by high water demand of pressure discharge for submerging and surfacing operation, high operation time index requirement, bring great economic benefits for ship overall design and construction.The design method can obtain ballast tank arrangement, ballast pump number, fire or other water injection pipeline system pipe diameter, gravity discharge pipeline system pipe diameter, gravity discharge average flow rate, air vent pipeline system pipe diameter and other key design parameters, form ship design waterline above ballast tank pressure discharge system design scheme.

Device for generating propulsion on a primarily muscle-powered watercraft, characterized in that it does not penetrate the sealing skin of supporting boat or floating bodies below the waterline, that the positively guided movement and guidance of propulsion-generating blades via cranks is used by the seated person by means of different directions of rotation for forward and reverse travel, and as a dual drive also for cornering and turning on the spot, so that a uniform rotational movement leads to an adequately uniform propulsion at the drive blade via a suitable transmission function (crank loop), wherein the blades, which are fixed at right angles to the connecting rod and can experience reaction force compensation in a lateral, paired arrangement, lie parallel to the direction of travel in both end positions, thus ensuring minimal water resistance in the unpowered state.

Disclosed is a method of reducing drag on the hull of the vessel by creating a Coanda flow on the hull by pulse jetting a fluid onto the hull or surface continuous with hull. The fluid is pulse jetted onto the hull or surface continuous with the hull at a location above or below the waterline of the vessel. The fluid may be pulse 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 pulsed jetted fluid. Systems for reducing drag are also disclosed.

1. Name of the product in this design: Ship draft observation device. 2. Purpose of this design: To observe the waterline of ships. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.