82results about How to "Guarantee the safety of navigation" patented technology

The invention provides a method for inland river bridge zone shipborne sailing active collision prevention. The method comprises the steps of collecting hydrological information, meteorological information and ship information of nearby ships and the ship, automatically updating river map information on line, and performing data storage; forecasting tracks of the ship and other ships according to obtained track information of the ship and other ships by combination with the real-time hydrological information and the meteorological information, and obtaining track information of every ship; calculating the nearest meeting distance and the nearest meeting time of the ship and a target object according to the obtained track information; and giving collision accident pre-warning and active collision prevention suggestions according to the nearest meeting distance and the nearest meeting time of the ship and the target object. According to the method, by predicating ship sailing situations, the shortcoming that an existing ship assistance navigation device cannot accurately obtain the position of the target object, and the nearest meeting distance and the reaching of the nearest meeting distance cannot be pre-judged more accurately is overcome.

The invention relates to the radio-positioning technical field, particularly a millimeter-wave marine frequency modulation multi-channel anti-collision radar, which is realized through the following steps: adopting the full-phase parameters to receive / transmit reference signals; asynchronously controlling the time division and the time sequence; watching the targets which are prone to collision on the water surface in an omni-directional manner through DSP cyclic scanning wave beams by a quasi-optical dielectric lens antenna circular array; controlling the time division SAW multi-channel passive frequency modulation through a plurality of water surface waterway cameras, an own ship speed sensor, a satellite positioning sensor GPS data MCU; sending to antenna array to transmit through an up-converter, T / R3, a frequency multiplier and a power amplifier, a circulator and T / R2; extracting the SAW multi-channel signals from the returning wave through the antenna array, a wave beam switch, T / R1, the circulator, a high amplifier, a down-converter and a medium amplifier; detecting a plurality of barrier target DSPs so as to confirm the position, the distance and the relative speed; displaying the three-dimensional image on a CRT, wherein the closer the ship gets to the target, the higher the resolution power is; controlling the false-alarm identification and tracing the nearest targets; giving an alarm when the distance is smaller than the safety distance; and intelligently avoiding the barriers or reducing if the distance is close to a risk distance, wherein the control is determined based on the actual condition of the water surface environment combined with the own ship speed and the GPS data, thereby improving the shipping safety.

The invention discloses an intelligent ship environment threat target perception system and method. The system comprises a sensor module, a target recognition module, a comprehensive control unit, a short-distance recognition system judgment module and a target feature database. The sensor module comprises a navigation radar, a GPS / Beidou positioning navigation device, a marine AIS receiver, a small target radar, a high-definition video camera tracking device, a three-dimensional laser radar, a millimeter wave radar and a marine pickup device. According to the invention, the active and passivesensors from far to near configured by the intelligent unmanned ships are reasonably configured, the radar signals, photoelectric signals and audio and video signals are considered simultaneously torealize the threat target perception, identification and tracking functions, and the threat objects can be quickly, accurately and reliably identified. The system and the method have a continuous andimprovable self-learning capability, and along with the collection and enrichment of a target audio and video feature library, the capability and efficiency of threat target perception and target recognition of the intelligent unmanned ships can be continuously improved.

The invention discloses a networking navigation radar target tracking system based on data fusion. The system comprises at least one radar front end, at least one radar terminal and an Ethernet. The radar front end and the radar terminal are in bidirectional data transmission through the Ethernet. The radar front end comprises an antenna, a transceiver, a data acquisition module, a signal preprocessor module and a control command processing module. The radar terminal comprises a display unit, a signal processing unit and a control unit. The transceiver generates radio-frequency pulses which are radiated to the space through an antenna. The system belongs to a trace point serial processing centralized data fusion structure, has the features of high fusion precision and small system time delay, and meanwhile, has the advantages of eliminating detection blind areas, improving detection probability and improving tracking performance. After the terminal carries out data fusion and comprehensive optimization processing on the data of the plurality of front ends, the problem of blind area of the single radar due to antenna erection location can be effectively solved, marine target detection and tracking accuracy performance is improved, and navigation safety is guaranteed.

The invention discloses a method and a system for a ship in a bridge area to actively avoid collision based on a laser three-dimensional imaging technique. The method comprises the following steps of S1, enabling the actively avoid collision system to judge whether the ship enters a recognition area or not; S2, enabling a data collection module to collect data, so as to obtain collected data information; S3, enabling a data storage module to store waterway basic information and the collected data information; S4, enabling a data processing terminal to judge navigation opening and track according to the waterway basic information and the collected data information; S5, publishing decision information. The method has the advantages that the relative position between a bridge pier, a navigation beacon as well as surrounding ships and the ship in the inland river bridge area can be accurately judged; by utilizing the collected data information and the accurate bridge pier and navigation beacon position information in an electronic waterway map, the navigation state of the ship is predicted, so as to ensure the navigation safety of the ship in the inland river bridge area.

The invention discloses a water traffic supervision and early warning system and method based on a machine learning technology. According to the system, big data and machine learning technologies aremainly utilized, historical ship track data are trained according to ship types and regions to obtain a ship navigation rule model which is more consistent with the actual navigation condition of theship, abnormal behaviors of the ships in the whole sea area in the administrative region are monitored in real time by utilizing the model, and finally, the abnormal behaviors are displayed to water traffic supervisors through an electronic nautical chart. Compared with a system for water traffic safety supervision and early warning based on rule setting, the system has the advantages of being higher in intelligent degree, complete in supervision water region coverage rate and low in early warning false alarm rate.

The invention relates to a multi-target autonomous collision avoidance method for an unmanned ship. The method comprises the following steps: resolving meeting parameters by using the detection information; determining a safe meeting distance according to the sailing state of the ship, and judging whether collision danger exists; sequentially calculating the collision danger degree of the target with collision danger; determining the priority of the avoidance target according to the collision danger degree to design and complete an avoidance scheme; and selecting an economical and safe avoidance scheme for output and execution. According to the method, the safe meeting distance is dynamically designed, the collision danger degree is judged, an effective collision avoidance scheme under a multi-target scene is provided for the unmanned ship, the calculation result is output in real time, the multi-target autonomous collision avoidance decision can be realized, the navigation safety of the unmanned ship is guaranteed, and the simulation result shows that the method has good practical application value.

The invention discloses a browser-based marine navigation system. The system is composed of three layers of network structures including a marine client, a Web server, an application server and a database server. The Web server is respectively in bidirectional connection with the marine client, the application server and the database server, and the application server is respectively in bidirectional connection with the marine client and the database server. The system adopts a mode of operating based on an IE (Internet Explorer), can avoid trouble and high cost in installation and maintenance of ECDIS (Electronic Chart Display And Information System) / ECS (Electronic Chart System) on a large number of ships in inland rivers, and the comprehensive navigation server can be obtained just with low mobile network communication cost, thus, the navigation safety of the ships is improved greatly. According to the invention, the three layers of network structures for integrated navigation service are provided, intercommunication between the browser-based marine navigation system and a shore-based system is established, and the function that the ship can obtain all-around integrated information service from one terminal is realized.

The invention discloses a ferry collision risk assessment method, system and device, and a medium. The method comprises the following steps of: determining an enclosed region through setting a water region boundary coordinate, acquiring AIS data in the enclosed region, carrying out the preprocessing of the AIS data, and acquiring the ship information; constructing an original trajectory of the ship according to the ship information, and segmenting the original trajectory; according to the spatial and temporal distribution of the original tracks of a ferry and target ships, acquiring target ships possibly meeting the ferry in the voyage, calculating relative motion parameters of the ferry and each target ship, and identifying meeting ships in the ferry and the target ships; and according to the trajectory data of the ferry and the corresponding meeting ships, constructing a multi-ship meeting scene in the ferry crossing process, and according to the multi-ship meeting scene, evaluating the ferry collision risk. According to the ferry collision risk assessment method, the multi-ship meeting scene in the ferry crossing process is constructed, the high-risk region in the ferry water region is recognized, and support is provided for guaranteeing the sailing safety of the ferry. The ferry collision risk assessment method, the system and the device can be widely applied to the field of water transportation safety and risk assessment.

The invention relates to the technical field of radio positioning radars, in particular to a millimeter-wave time division frequency-modulation shipborne multi-target detection collision-proof radar.A quasi-optical dielectric lens antenna annular array is arranged; a DSP cyclically scans wave beams to omni-directionally guard against a target possibly collided on a water surface; the radar receives / emits reference signals with full-phase-coherence, and adopts time division time sequence asynchronous control; signals of a water photographic sensor, a ship speed sensor and a global positioningsystem (GPS) sensor access an MCU control time division circuit to generate n-path modulation frequency and waveform millimeter-wave linear phase-lock frequency modulation, and are emitted through anR / T2, an optical circulator, a beam switch, and an antenna array; back waves are subjected to processing control in the DSP and the MCU through the antenna array, the beam switch, the optical circulator, an R / T1, a low noise high frequency amplifier, a fourth-harmonic mixer, an intermediate frequency amplifier, a time division circuit, and a multi-target signal related matched filter; and when theradar meets multiple targets, the radar inhibits false-alarm and determines azimuth angles, distances and relative speeds thereof through the DSP, displays three-dimensional images and identifies a target closest to the ship through a CRT, performs the audible and visual alarm if the distance of the target is smaller than a safety distance, intelligently avoids a barrier or reduces speed or brakes if the distance of the target is approximate to a danger distance, and controls and references an actual condition of the water surface to combine the speed of the ship and GPS data to make a choice, thereby obviously improving the sailing safety of the ship.

The invention relates to an automatic danger object light tracking device and method used for ship night navigation. The automatic danger object light tracking device comprises a signal collection unit, a timer, a signal processing unit and a lamp holder control unit, wherein the signal collection unit comprises a shipborne ARPA radar, a ship cab sensor and an AIS terminal; the timer is used for collecting pulse signals of two rotary encoders in the horizontal direction and the vertical direction of a lamp holder in a counting mode; the signal processing unit is used for obtaining the current rotation position of the lamp holder according to information of the signal collection unit and the pulse signals of the timer and obtaining the horizontal and vertical angles by which a searchlight needs to rotate relative to the current position; the lamp holder control unit is used for controlling the horizontal and vertical rotation of the whole lamp holder according to output information of a single-chip microcomputer. The automatic danger object light tracking device and method used for the ship night navigation solve the problem that current shipborne collision prevention and navigation equipment is not convenient to use and is not visual, the large-power searchlight is adopted to automatically locate and track dynamic objects possibly collided with a ship in time, and the possibility that sailors ignore potential collision risks is reduced.

The invention discloses a complex network theory-based water route vulnerability research method. The complex network theory-based water route vulnerability research method comprises an implementationscheme and a research method, wherein the research method comprises a complex network theory and numerical calculation; and the complex network theory comprises a basic conception and feature parameters. According to the method, a ship route network model is established; and MATLAB software is utilized to calculate feature parameters of a complex network, wherein feature parameters comprise degree distribution, a clustering coefficient, a relative size of a maximal connected subgraph, an average efficiency of the network and a tightness index. The numerical calculation pays attention to the stability of calculation, is capable of controlling the growth momentums of errors and ensuring the stability of the calculation process, and pays attention to high calculation speed and high calculation precision, so that the numerical calculation is capable of correctly judging the property of the network and has reliability for the researches.

The invention provides a multi-water-level-station-linked inland river water level intelligent prediction method. The method comprises the steps of S1, preparing sample data, and performing vacancy value filling and SG filtering smoothing processing on the sample data; S2 constructing a three-water-level-station linkage prediction model based on the GRU; and S3, training and predicting the three-water-level-station linkage prediction model constructed in the step S2 by adopting forward propagation and reverse propagation. According to the technical scheme, a water level prediction model is constructed by using a GRU (gated recurrent unit) recurrent neural network. The difference between the scheme and the prior art is that the time relationship of water level values and the space relationship between water level stations are considered. In order to predict the water level value of a certain water level station. The scheme not only depends on the historical data of the water level station, but also utilizes the historical data of the adjacent upstream and downstream water level stations to assist in establishing a prediction model. Therefore, the error of single station data is reduced. The general law of water level change is better reflected and the accuracy of water level prediction is improved.

The invention discloses a navigation risk evaluation method for a bridge. The method comprises the following steps: building a ship motion mathematic model, and building a ship and bridge collision probability mathematic model based on the ship motion mathematic model through employing the design size of the bridge, a passing ship type, a bridge region air flow navigation condition and ship flow as risk factors of the collision between a ship and the bridge; and establishing a navigation risk grading standard corresponding to the collision probability of the ship and the bridge, and evaluatingthe navigation risk of the bridge by applying the mathematical model of the collision probability of the ship and the bridge. The navigation risk can be quantitatively evaluated in the design stage of the bridge, so that the ship safety of the water area of the bridge area is guaranteed.

The invention discloses a ship collision avoidance decision optimization method based on a foreground theory. The collision risk degree, the voyage loss and the trajectory stability are selected as collision avoidance decision optimization indexes; a ship collision avoidance decision optimization model based on a foreground theory is constructed, and risk preferences of people are considered; decision difference caused by different risk attitudes of a ship driver in the ship collision avoidance process is solved by utilizing a foreground theory, and optimal collision avoidance decisions of different crew psychological expectations under different risk preferences are selected, so that the purposes of guaranteeing navigation safety, improving collision avoidance efficiency and saving navigation cost are achieved.

The invention relates to a mobile-internet-based VTS safety information service system and method. The system is characterized in that the system comprises a plurality of ship navigation application clients arranged at a chip, a cloud service platform, a VTS safety information database, and a plurality of VTS command platforms, wherein the ship navigation application clients have the mobile internet communication capability. The cloud service platform is operated at an external network of a bureau of maritime affairs; and the VTS safety information database and the VTS command platforms are operated at an internal network of the bureau of maritime affairs. According to the technical scheme, a complete and intelligent integrated VTS service system can be established for any inland river and thus the inland water transportation becomes smooth, safe and efficient in order, thereby creating great economic and social benefits. Therefore, the provided system and method can be applied to the ship traffic management field.

The invention discloses an inter-ship distance real-time determination system and method under icebreaker navigation, and the method comprises the steps: 1), collecting sea ice environment data of a ship navigation region and the ship information of an icebreaker and a navigated ship, and calculating the ship suggested speed of a ship under a specific ice condition according to a polar region iceregion navigation system; 2) according to the historical data of the ship navigation speed, extracting ship navigation speed distribution under icebreaker navigation protection to obtain fitted speeddistribution; 3) establishing a ship following distance simulation model, and calculating the shortest safe following distance; and 4) comparing the real-time car-following distance measured by the distance measuring device with the shortest safety car-following distance output by simulation, and carrying out early warning according to the comparison result. According to the method, the collisionrisk between ships under icebreaker navigation protection is effectively reduced, the navigation safety of the arctic-ship-route ships is guaranteed, and the method has guiding significance for determining the following distance under the arctic-ship-route ship formation navigation operation mode.

The invention belongs to the field of image enhancement, and particularly relates to an improved high-frequency emphasis filtering rapid sea fog image enhancement method. The method comprises the steps that (1) sea images are acquired; (2) sea fog of the images based on an improved high-frequency emphasis filtering algorithm is removed; and (3) clear images are displayed. The method is suitable for all ships on the water surface, and the processed images with fog on the water surface are acquired by visible light cameras installed on the ships on the water surface. The improved high-frequency emphasis filtering enhancement algorithm is provided so that visibility and contrast ratio of the sea fog blurred images can be greatly enhanced. With processing of the algorithm, sea navigation adaptive capacity of the ships on the water surface can be greatly enhanced, and navigation safety of the ships on the water surface can be greatly guaranteed.

The invention discloses a hull attitude calculation method and application. The hull attitude calculation method comprises the following steps: (1) observing a GNSS signal signal signal-to-noise ratioby utilizing a shipborne GNSS antenna and a GNSS receiver; (2) inverting the height from the GNSS antenna to the water surface; and (3) fitting a hull attitude plane, and calculating a rolling angle,a pitching angle and heaving displacement; after the hull posture is obtained, mapping the hull external sensor mounting point and the design coordinate of the lowest point of the hull to the ship body posture plane through rotation and translation, obtaining the vertical height after coordinate transformation, and calculating the vertical height from the ship body external sensor to the water surface or the ship body draft. According to the method, metadata description of the measurement height can be provided for measurement data of an external sensor, the data quality is improved, the method and other draught depth measurement equipment installed on a ship supplement each other, and the navigation safety of the ship is guaranteed. Other external optical and acoustic sensors do not needto be installed.

The invention relates to a ship automatic identification system based on a Beidou network. The system comprises multiple Beidou shipborne terminals which collect real-time dynamic information of eachBeidou ship and send the information to a Beidou satellite ground station via a Beidou satellite and a shore server which receives the real-time dynamic information of each Beidou ship, determines anautomatic identification effective range of the Beidou ship, screening and filtering real-time dynamic information of other Beidou ships for each Beidou ship in the range, sends the real-time dynamicinformation of each Beidou ship to Beidou shipborne terminals of other Beidou ships in the range, and realizing the mutual identification and communication between the BeiDou ships within the automatic identification effective range. According to the system, a Beidou ship can realize the mutual identification and communication with other BeiDou ships within a nearby sea identification range without an AIS, the efficiency of the communication between the BeiDou ships is improved, and the arrangement of a navigation plan is facilitated to ensure the navigation safety.

The invention discloses a three-dimensional ship visualized management system. The three-dimensional ship visualized management system comprises a 3D monitoring module, a whole ship monitoring module, a 3D simulation module, a ship structure module, a ship system module, a ship equipment module, a power module, a background database management module, a 3D model module and a database; the background database management module transfers static information in the database to the whole ship monitoring module or transfers dynamic information in the database to the 3D model module; the whole ship monitoring module realizes the whole-area monitoring of a ship according to the received static information and the monitoring commands of the 3D monitoring module; and the 3D simulation module sends corresponding control commands to the ship structure module, the ship system module, the ship equipment module or the power module according to the selection commands of the 3D monitoring module. According to the three-dimensional ship visualized management system of the invention, the management of the operation of the ship is realized through digitalized three-dimensional simulation.

The invention provides a course error evaluation and compensation method and device for a rotary inertial navigation system and electronic equipment. The method comprises the steps of executing a first analysis processing operation on a latitude error of the rotary inertial navigation system in real time based on a preset error factor to obtain a first processing result; performing second analysisprocessing operation on the course error of the rotary inertial navigation system in real time based on the preset error factor, and obtaining a second processing result; executing third analysis processing operation on the first processing result and the second processing result to obtain an association result of the course error and the latitude error, and evaluating the course error of the rotary inertial navigation system by using the latitude error based on the association result. The course error of the inertial navigation system can be evaluated and compensated in real time, and the course precision of the ship inertial navigation system is greatly improved.

The invention relates to a method for checking and correcting a collision avoidance decision of an unmanned boat. The method comprises the following steps: a barrier or a dynamic ship encountered by the unmanned boat in navigation is subjected to encountering parameter calculation, and whether a collision risk exists or not is judged; a first avoidance scheme is designed on the basis of a speed barrier principle; and the first avoidance scheme is checked, whether other collision risks exist or not is judged, and if no collision risk exists, the first avoidance scheme is directly output to an unmanned boat navigation decision-making system and an execution mechanism is controlled to implement the first avoidance scheme, otherwise, a second avoidance scheme is designed and fused with the first avoidance scheme to obtain a third avoidance scheme, the third avoidance scheme is output to the unmanned boat navigation decision-making system and the execution mechanism is controlled to implement the third avoidance scheme. According to the method, the calculated collision avoidance decision is checked and corrected while a search area is expanded; and the collision avoidance scheme with local optimum is provided and recommended for the unmanned boat, so that the navigation safety of the unmanned boat is guaranteed.

The invention discloses an offshore buoyant raft culture area extraction method based on SAR and optical image fusion. An optical image and SAR image fusion mode is adopted to extract a marine culturearea, a fusion algorithm most suitable for marine culture area extraction is obtained through experiments, and the precision of offshore water area buoyant raft culture area extraction is effectivelyimproved. According to the experimental result, the marine buoyant raft culture range can be accurately defined; the method is beneficial for government departments to more effectively supervise offshore culture areas, standardize the culture density of the culture areas, purify the culture water area environment, relieve the contradiction between the increase of transport ships and the continuous expansion of the culture water area, prevent commercial ships from entering the culture areas by mistake to pollute the culture water area, and ensure the sailing safety of the ships.

The invention discloses a ship maintenance platform. The system comprises a ship end data sensing system and a ship data monitoring system, ship maintenance management system. The cross-end data sensing system is in data signal connection with the ship data monitoring system. The ship data monitoring system is in data signal connection with the ship maintenance management system. The ship end datasensing system collects and obtains operation state data of ship cabin equipment through ship end data sensing equipment, real-time comprehensive monitoring of the ship operation state is achieved, and the ship data monitoring system processes and analyzes the ship cabin sensing data to obtain operation state information of all the equipment of a ship. The method has the advantages that the operation state of ship cabin equipment is analyzed and displayed by collecting ship-end cabin data, and management of the whole process of ship maintenance is achieved.

The invention discloses a system and a method for transmitting aviation flight data and navigation information. The system comprises a data mining server, a database, a performance server, a system management server and at least one mobile terminal, wherein each mobile terminal is connected with the performance server and the system management server; the database is respectively connected with the performance server and the system management server; the performance server is connected with the system management server; and the database is connected with the data mining server. According to the system, a pilot can quickly, conveniently and accurately obtain more complete, accurate and visual information resource and data before implementing a flight task, so that the navigation safety is better guaranteed and the economic benefit is increased.

The invention discloses an artificial island manufacture method, which comprises the following steps that a plurality of sections of platform units required by an artificial island main boat body are manufactured on the land; a plurality of sections of platform units are subjected to split joint to form the main boat body on the land; the main boat body is directly conveyed to the destination ocean through a tugboat; a pile leg and an ascending and descending mechanism are arranged on the main boat body; and the ascending and descending mechanism is started, the ascending and descending mechanism is continuously started after the pile leg descends to the seabed, the main boat body ascends relative to the pile leg to leave the sea level, the ascending and descending mechanism is locked after the main boat body ascends to the required height, and an artificial island is formed. The artificial island manufacture method provided by the invention has the advantages that the manufacture is simple, the installation is convenient, the ascending or descending of the main boat body can be fast realized by the pile leg directly through the ascending and descending mechanism, the artificial island can also be conveniently moved to the use region according to requirements, and the method has rich potential economic benefits, social benefits and martial effects.

The invention discloses a geometric relationship-based skew bridge navigation effective navigation net width determination method, and the method is calculated by adopting the following formula: l = B-C or E, and the two values are taken as large values, wherein l is the effective navigation net width, B is the actual navigation net width, C is the anti-collision facility occupation width, E is the pier turbulence width, and C / E is the large value. When the skew bridge is a forward bridge, the actual navigation net width is calculated by adopting the following formula: B = (L-b-a * tan(alpha))* cos(alpha); when the skew bridge is a skew bridge, the actual navigation net width is calculated by adopting the following formula: B = (L-b) * cos(alpha), wherein L represents the span, b represents the width of a pier or a bridge column, a represents the length of the pier or the bridge column, and alpha represents the included angle between the water flow direction and the normal direction of the bridge axis. Plane arrangement of the bridge is combined with water flow navigation and river channel conditions of the bridge area, a basis is provided for planning and designing of the skew bridge, the effective navigation clear width can be obtained in the bridge design stage, and therefore, the bridge navigation design scheme is optimized, and ship navigation safety of the water area ofthe bridge area is guaranteed.

The invention provides an inland river intelligent navigation mark position monitoring method. The method comprises steps that the data transmitted by a navigation mark terminal is received, and the data comprises longitude / latitude values of the dynamic position of the navigation mark terminal; gauss-kruger projection forward calculation is employed to solve the dynamic position of the navigation mark terminal and a gauss plane coordinate corresponding to the base point position; a distance between the dynamic position and the base point position is calculated according to the gauss plane coordinate; the distance is compared with an offset distance threshold, if the distance is greater than the offset distance threshold, drift alarm is carried out, if the distance is not greater than the offset distance threshold, the position of the navigation mark terminal is determined to be normal. Through the method, a problem of imprecise calculation of the navigation mark terminal is solved, accuracy and timeliness of drift alarm are improved, error alarm and missed alarm can be avoided, and guarantee is provided for ship navigation safety.