CN-122027378-A - NAVDAT, weather facsimile and NAVTEX cooperative maritime information broadcasting system

CN122027378ACN 122027378 ACN122027378 ACN 122027378ACN-122027378-A

Abstract

The invention discloses a maritime information broadcasting system with the cooperation of NAVDAT, weather fax and NAVTEX, which comprises a shore-based intelligent fusion gateway, a ship-based fusion terminal and a fusion display terminal, wherein the shore-based intelligent fusion gateway is used for analyzing and mapping received maritime safety information into a unified maritime event information model, generating broadcasting signals meeting the technical standards of the NAVDAT, weather fax and NAVTEX systems in parallel based on the maritime event information model, embedding unified association identifiers into the broadcasting signals from the same information model, and receiving and analyzing the broadcasting signals by the ship-based fusion terminal, automatically associating and recombining information from different systems according to the unified association identifiers, and taking an event as a unit for fusion display. The invention can realize the depth coordination of the NAVDAT system, the weather facsimile system and the NAVTEX system in a protocol layer, a data layer and an application layer, and remarkably improve the integrity, the cognitive efficiency and the decision support capability of maritime safety information.

Inventors

ZHENG DEFU
WANG RUI
AN YUTING

Assignees

上海埃威信息科技有限公司

Dates

Publication Date: 20260512
Application Date: 20251223

Claims (10)

1. A NAVDAT, weather facsimile and NAVTEX collaborative maritime information broadcasting system, comprising: The shore-based intelligent fusion gateway is used for analyzing and mapping the received maritime safety information into a unified maritime event information model, generating broadcast signals which accord with the technical standards of NAVDAT, weather fax and NAVTEX systems in parallel based on the maritime event information model, and embedding a unified association identifier into the broadcast signals which originate from the same information model; And the shipborne fusion terminal receives and analyzes the broadcast signals, automatically correlates and reorganizes the information from different systems according to the unified correlation identifier, and fuses and displays the information by taking the event as a unit.
2. The marine information broadcasting system of claim 1, wherein the shore-based intelligent fusion gateway comprises: the information modeling module is used for converting heterogeneous original information into a maritime event information model with a unified structure; The cooperative broadcasting decision module is used for dynamically deciding the content distribution and broadcasting strategies of the marine event information model on NAVDAT, weather fax and NAVTEX systems according to the attribute of the marine event information model; The multi-protocol signal generation module is used for synchronously executing protocol conversion and signal generation according to the content distribution and broadcasting strategy of the dynamic decision and outputting broadcast signals of three systems; And the association identifier management module is used for generating a globally unique association identifier and adaptively embedding the globally unique association identifier into a preset position of each protocol signal.
3. The marine information broadcasting system of claim 2, wherein the collaborative broadcasting decision-making module employs a broadcasting strategy of the following information hierarchy: the first layer is a core alarm, and mandatory/urgent text information is preferentially distributed to the NAVTEX system; The second layer is a macroscopic situation, and large-scale and background image information is distributed to a weather facsimile system; the third layer is enhancement details, high data volume, refinement or interactive enhancement information distribution to the NAVDAT system.
4. The marine information broadcasting system of claim 2, wherein the embedding of the association identifier in the association identifier management module comprises: embedding the message body as readable text instructions and/or machine readable code in the NAVTEX message; In the weather facsimile signal, encoded as part of header information; In the navdata signal, metadata or header information is used as a data frame.
5. The marine information broadcasting system of claim 4, wherein the association identifier adopts a composite format including event type, time stamp and geographical area code, and is embedded in a header area of the facsimile image in a pixel lattice of Morse code or specific coding format, the pixel lattice is added with specific start/end mark pixel sequence before and after, and error correction coding is set.
6. The marine information broadcasting system of claim 3, wherein the background image information is distributed to the weather facsimile system after being processed as follows: Resampling, namely acquiring the scanning line number of the fax machine and the pixel resolution of an original satellite cloud picture, and scaling to a standard size through an interpolation algorithm; calibrating proportion, namely ensuring that longitude and latitude grids in the image accurately correspond to pixel positions; Tone mapping and binarization, converting a color or gray image into a high contrast black-and-white binary image according to weather facsimile standards, black representing clouds/land, white representing sea/sky areas, and using a specific tone curve to preserve the most important weather features.
7. The marine information broadcasting system of claim 6, wherein the weather feature retention process is as follows: The pixels with gray scale of 0-50 in the low brightness interval are forcedly mapped to white, dark background is cleared, and the background characteristics including sea, dead zone and cloudless land are reserved; For pixels with the gray level of 50-200 in the middle brightness interval, the contrast is enhanced according to edge detection, the contours of a cloud system and a frontal surface are output after the boundary is highlighted, or textures and gradual change information are reserved according to an error diffusion result, and a cloud layer is output; For pixels in a high-brightness interval with gray level larger than 200, forcibly and continuously mapping the pixels into black, and reserving a strong weather system main body comprising typhoon eye walls, strong convection clouds and dense fog areas; the preserved isobars, isotherms, shorelines, and symbols are superimposed to maintain the readability of the geo-referenced and weather analysis framework.
8. The marine information broadcasting system of claim 1, wherein the on-board fusion terminal comprises: A multi-system receiving module configured to receive NAVDAT, weather facsimile and NAVTEX signals simultaneously or in a time-sharing manner; The information analysis engine is configured to analyze three signals of NAVDAT, weather fax and NAVTEX in parallel and extract effective information and an associated identifier; The data association engine is configured to automatically associate information from different systems and different formats to the same maritime event in the background according to the extracted association identifier; and the fusion display interface is configured to uniformly display the associated multi-mode information by taking the maritime event as a core operation object.
9. The marine information broadcasting system of claim 8, wherein the data association engine is configured to actively search for and associate information with the same identifier in other systems in the local storage after receiving the signal of any system and extracting the associated identifier, thereby completing the reorganization of the event information.
10. The marine information broadcasting system of claim 8, wherein the fusion display interface is arranged in a column, layer or superposition manner, and can display text information from NAVTEX, image information from weather fax and enhanced data information from NAVDAT simultaneously or according to requirements, and when an event is selected in the main area, text abstract from NAVTEX, background cloud image of weather fax and forecast path vector image from NAVDAT superimposed thereon are displayed in a correlated manner.

Description

NAVDAT, weather facsimile and NAVTEX cooperative maritime information broadcasting system Technical Field The invention relates to a maritime information broadcasting system, in particular to a maritime information broadcasting system with cooperation of NAVDAT, weather facsimile and NAVTEX. Background Currently, the broadcasting of offshore security information (MSI) relies on three systems, NAVTEX, weather FAX (FAX) and NAVDAT, which form a technical gap that is difficult to surmount due to the different design ages and technical goals: 1. The isomerism of the protocol system is that NAVTEX adopts a low-speed character-oriented narrow-band direct printing telegraph (NBDP) protocol, the wide coverage and reliability are realized, weather faxing adopts an analog modulation subcarrier protocol, the design is specially designed for transmitting continuous pixel streams, and NAVDAT adopts a high-speed packet-switched modern digital broadcasting protocol, so that file and data stream transmission is supported. The three layers have no intercommunication foundation from the physical layer to the application layer. 2. The data semantic fragility is achieved, and the three broadcasting information is not provided with a unified data model. The NAVTEX text is designed by manual interpretation, lacks machine-readable structured fields, is a pure pixel matrix by weather faxing, loses semantic information of objects in the graph, and has potential to bear structured data, but has no association mechanism defined by authorities with the other two. Such semantic faults result in information that cannot be automatically associated and understood by the terminal. 3. The isolation of resource scheduling, namely, three systems independently plan broadcasting time sequence and content, and for composite maritime events (such as typhoons), text warning, situation diagrams and refined data are forced to be split, and broadcast is carried out at different times and through different channels, so that not only is spectrum resource wasted, but also crewman cognition delay and decision difficulty are caused. The existing solution only stays in installing a plurality of terminals for the ship or performing simple manual information comparison, but does not solve the fundamental 'isomerism' and 'cleavage' problems from the source and system level. Therefore, there is an urgent need in the art for a fundamental solution that can translate at the protocol level, semantically associate at the data level, and schedule uniform resources at the system level. Therefore, the basic defects caused by technical system isomerism, data semantic splitting and resource scheduling isolation of the existing three-big maritime broadcasting system are overcome, and the maritime information broadcasting system capable of realizing deep intelligent cooperation in protocol, data and application layers is provided. Disclosure of Invention The technical problem to be solved by the invention is to provide a marine information broadcasting system with the cooperation of NAVDAT, weather facsimile and NAVTEX, which can realize the deep cooperation of the NAVDAT system, the weather facsimile system and the NAVTEX system in a protocol layer, a data layer and an application layer, and remarkably improve the integrity, the cognitive efficiency and the decision support capability of marine safety information. The invention provides a maritime information broadcasting system with the cooperation of NAVDAT, weather fax and NAVTEX, which comprises a shore-based intelligent fusion gateway, a ship-based fusion terminal, a fusion display terminal and a network interface, wherein the shore-based intelligent fusion gateway is used for analyzing and mapping received maritime safety information into a unified maritime event information model, generating broadcasting signals meeting the technical standards of the NAVDAT, weather fax and NAVTEX systems in parallel based on the maritime event information model, embedding unified association identifiers into the broadcasting signals from the same information model, and receiving and analyzing the broadcasting signals according to the unified association identifiers, and automatically associating and recombining information from different systems and carrying out fusion display by taking events as units. The shore-based intelligent fusion gateway comprises an information modeling module, a collaborative broadcasting decision module, a multi-protocol signal generation module and an association identifier management module, wherein the information modeling module is used for converting heterogeneous original information into a maritime event information model with a unified structure, the collaborative broadcasting decision module is used for dynamically deciding a content distribution and broadcasting strategy on NAVDAT, weather fax and NAVTEX systems according to the attribute of the maritime event information model, the multi-pr