12 results about "Navigability" patented technology

The application discloses a kind of multi-source sensing and space-time matching inland waterway navigability test and evaluation method, belong to waterway engineering and ship test evaluation technical field.Pass through the layout shore base monitoring unit and integrated shipboard perception unit, unified space-time datum is constructed;Based on unified space-time datum, space-time matching fusion is carried out to ship dynamic response data and waterway environment data, forms ship response-environment excitation coupling data set, constructs three-layer navigability performance evaluation system, uses improved fuzzy analytic hierarchy process to determine index weight in combination with three scale method and optimal transfer matrix, uses cloud model to complete index quantization and comprehensive evaluation value calculation, finally determines waterway navigability effect grade according to comprehensive expectation value.The application realizes the quantitative evaluation of multi-source data accurate fusion and subjective and objective fusion, forms standardization test and evaluation process, truly reflects the coupling navigability characteristics of waterway and ship, provides technical support for inland waterway engineering acceptance, navigation safety management and waterway optimization design.

This invention relates to the field of maritime traffic control technology and discloses an intelligent perception system for unmanned vessel oil spill accidents, comprising: a tidal current analysis unit, an oil film analysis unit, a traffic analysis unit, and a traffic control unit. The tidal current analysis unit generates a tidal dynamic field containing navigability, tidal hazard intensity, etc., thereby reflecting the risk of the flow field. The oil film analysis unit collaboratively analyzes the oil spill data with the tidal dynamic field to generate an oil film disturbance motion vector, reflecting channel encroachment and navigation obstruction. The traffic analysis unit generates a predicted hazardous spatiotemporal set containing hazardous time periods, areas, and levels to cover the potential drift range of the oil film. The traffic control unit plots the dynamically predicted hazardous area and issues traffic control commands, thereby achieving accurate prediction and dynamic control of oil film drift, avoiding traffic chaos in the main channel, improving the accuracy of traffic control in strong tidal port channels, and ensuring navigation safety.

The invention provides a cross-border river water transportation pollution risk acquisition method, which comprises the following steps of: acquiring a first evaluation index according to the ship route traffic volume, the ship route dangerous goods transportation ship volume, the ship route water refueling point number and the ship route loading and unloading wharf number of a water transportation ship route of a drinking water cross-border area, obtaining a second evaluation index according to the water quality standard-reaching proportion and the navigable water flow of the navigable water body of the water transportation route of the drinking water transboundary region, acquiring a third evaluation index according to the shortest distance between the cross-boundary section and the refueling point, the shortest distance between the cross-boundary section and the wharf, the percentage of the area of a drinking water source protection area in the navigable river to the area of the whole river, the precious and rare aquatic species of the water containing body and the population density of the cross-boundary area; and according to the first evaluation index, the second evaluation index and the third evaluation index, obtaining a risk index taking the water traffic route as a risk source so as to indicate the risk of water pollution accidents caused by the water traffic route of the drinking water transboundary region.

The present application relates to the technical field of path planning, in particular to an unmanned ship formation path planning method and device, electronic equipment and medium. In the present application, by constructing a global path planning model based on time-optimal A algorithm, the total sailing time of the formation is minimized and the current velocity is considered, which improves the sailing efficiency of the global path; the collision avoidance threat degree is dynamically calculated to determine the dynamic priority of the unmanned ship, which effectively reduces the collision risk; when a path intersection conflict occurs, local path re-planning is triggered according to the priority, which guarantees the safety and coordination of the formation sailing; the local path is smoothed and optimized by using B-spline curve, so that the path is more continuous and smooth, the motion mutation is reduced, and the sailing stability is improved. The overall scheme takes into account the sailing efficiency, safe obstacle avoidance and path smoothness, and enhances the path planning capability and sailing performance of the unmanned ship formation in complex marine environment.

The invention relates to the field of meteorological data fusion, in particular to a man-machine collaborative ocean vessel route planning method and system combined with meteorological data, and the method comprises the steps: obtaining historical vessel navigation trajectory data and electronic chart data in response to a route planning request, and generating a global navigation grid covering a navigation area based on the data; generating an initial route from a starting point to a terminal point based on the global navigation grid in combination with preset ship parameters; acquiring weather forecast data, and coupling the weather forecast data with the initial route to deduce a future ship position of a ship on the initial route; based on the deduced initial route, receiving an editing operation of a user on the deduced initial route in real time, and forming an optimized route based on an operation result; according to the weather forecast data, calculating a comprehensive navigation performance index of an optimized route; and outputting the optimized route and the corresponding comprehensive navigation performance index based on the calculation result.

The utility model relates to the technical field of inflatable boats, and discloses a rigid inflatable boat, which comprises a boat body and an inflatable fender, the boat body comprises a deck and a plurality of bulkheads, the bulkheads are arranged below the deck, the bulkheads are arranged at intervals along the length direction of the boat body, and the boat body is divided into a plurality of independent cabins by the bulkheads. The cabin at least comprises a closed fore peak close to the boat bow, the fore peak is used for being filled with gas to provide buoyancy, and the inflatable fender is arranged on the outer side of the boat body. According to the rigid inflatable boat, the fore peak is arranged in the boat body, on one hand, the fore peak can provide buoyancy, and the boat body is protected by the surrounding inflatable fenders, so that the fore peak is not easy to damage due to collision, the buoyancy can be reliably provided under the emergency condition that the surrounding inflatable fenders are damaged, and the sinking resistance of the rigid inflatable boat is improved; on the other hand, the fore peak is close to the boat bow, so that the trim angle of the rigid inflatable boat can be increased, and the rigid inflatable boat can obtain better sailing performance.

The invention belongs to the technical field of new-generation information, and particularly relates to a polar navigation channel navigability evaluation method based on a multi-source data strong synergistic effect, which comprises the steps of data preprocessing and grid division; construction of a comprehensive evaluation index system: constructing an index system covering five dimensions of sea ice, weather, ocean, navigation channel and policy management, the method specifically includes the following 17 indexes: sea ice concentration, sea ice thickness, air temperature, wind speed, low cloud amount, precipitation amount, snowfall amount, liquid water amount, ocean current flow velocity, sea surface temperature, sea wave height, sea surface air pressure, channel depth, channel width, channel intersection point, port facility and national territorial sea, and performing dimensionless processing on each index; carrying out weight calculation and an optimization algorithm; and constructing a navigability evaluation system and a navigability index. According to the method, the limitation of narrow evaluation dimension in the traditional technology is overcome, the comprehensive representation of the multi-factor coupling effect of the polar navigation environment is realized, and the comprehensiveness and objectivity of the evaluation result are effectively improved.

The invention discloses a polar region route dynamic planning system fused with AIS navigational speed feedback. The polar region route dynamic planning system comprises a data acquisition module used for acquiring polar region sea ice environment data and ship performance parameters; the nonlinear modeling module is used for realizing speed estimation of a ship under a complex sea ice condition by establishing a fitting model between sea ice concentration and different ship type navigational speeds; the propulsion-environment feedback module constructs a closed-loop mechanism of ship propulsion displacement, speed and environment change and is used for dynamically correcting the feasible propulsion capability of the ship under different environment conditions; the dynamic path planning module is based on an improved path search algorithm, and is combined with the sea ice navigational speed nonlinear module and the propulsion-environment feedback module to generate an optimal route meeting the requirements of safety, navigability and economy; and the result output module is used for outputting the optimal route in each day or any time scale and the corresponding time and distance consumption.

The invention relates to the technical field of marine surveying and mapping, and aims to solve the problem of inaccurate evaluation caused by separation of an existing terrain navigability evaluation method and a matching algorithm. The invention provides a terrain navigability evaluation method coupled with an underwater aided navigation algorithm, which is characterized by comprising the following steps of: constructing a circular ring window by taking a point to be evaluated as a center; discretized sampling is carried out on the window to obtain a water depth value sequence; calculating a mean square error sequence of the center point and the peripheral point sequence; and taking the standard deviation of the mean square deviation sequence as a navigability evaluation index. According to the method, the similarity measurement process of the matching algorithm is simulated, so that the evaluation result is strongly correlated with the positioning precision, and the method can be used for intelligent path planning and real-time navigation area optimization of the underwater vehicle.

The invention discloses erecting equipment for a large-span half-through arch bridge stretching across a levee and a construction method. The erecting equipment comprises the steps that a gantry crane anti-sliding foundation containing pre-embedded uplift piles and saddle weights is constructed, a 120 t gantry crane with hydraulic drive liftable supporting legs is adopted to be arranged across the levee, and steel truss girders stretching to cover 16 sections of the Yifen side and 17 sections of the Chaohu side are erected; the included angle between the buckling tower wind cable and the horizontal direction is optimized to be 60-65 degrees, and a PT100 temperature sensor is additionally arranged at an arch rib closure opening to achieve precise closure; the matched erecting equipment comprises the gantry crane, a 100t arch climbing crane, a 400t. M tower crane, a position adjusting system and the like. By means of the structure and the method, the settlement amount of the levee is controlled within 0.5 mm, the channel passing rate is 100%, the construction period is shortened by 32 days or above compared with an existing scheme, the cable buckling force is reduced by 20%, meanwhile, the construction method adapts to the wide water level variable amplitude, is suitable for construction of the large-span half-through steel truss arch bridge which crosses the river levee and needs to guarantee channel navigation, and has ecological protection and engineering benefits.

The application discloses a water surface ship and towing system coupling motion analysis method and belongs to the technical field of ship and ocean engineering. The application constructs a six-degree-of-freedom motion model of a water surface ship, constructs a towing cable motion control model, constructs a six-degree-of-freedom motion model of an underwater towed body, constructs a motion control model of the water surface ship-towing cable-towed body, adopts a three-dimensional panel method to determine the hydrodynamic coefficients in the ship motion model, adopts a fourth-order Runge-Kutta method to determine the six-degree-of-freedom motion of the water surface ship and the towed body, and adopts a finite difference method to determine the tension and oscillation motion of the towing cable. The application quantitatively analyzes the influence of the water surface ship oscillation motion on the towing force of the towing cable and the oscillation motion of the towing cable and the influence of the towing cable on the water surface ship oscillation motion, thereby assisting in optimizing the tail structure of the water surface ship, the shape of the towing cable and the shape of the towed body, improving the navigation performance of the water surface ship and improving the operation safety of the towing system.

This invention discloses a polar route dynamic planning system integrating AIS speed feedback, comprising: a data acquisition module for collecting polar sea ice environment data and ship performance parameters; a nonlinear modeling module for estimating ship speed under complex sea ice conditions by establishing a fitting model between sea ice concentration and the speed of different ship types; a propulsion-environment feedback module for constructing a closed-loop mechanism of ship propulsion displacement, speed, and environmental changes to dynamically correct the ship's feasible propulsion capability under different environmental conditions; a dynamic path planning module for generating the optimal route that satisfies safety, navigability, and economy based on an improved path search algorithm, combined with the aforementioned sea ice speed nonlinear module and propulsion-environment feedback module; and a result output module for outputting the optimal route and its corresponding time and distance consumption for daily or arbitrary time scales.