CN-115718310-B - Multi-source navigation information fusion method and system based on space-time characteristics

Abstract

The invention provides a multi-source navigation information fusion method and system based on space-time characteristics. The method comprises the steps of obtaining navigation data from different navigation systems and data sources, classifying the data with normal judging results according to information types, carrying out rationality test on the classified navigation data, carrying out space-time consistency calibration on multisource heterogeneous similar data passing the rationality test, carrying out data fusion on the multisource heterogeneous similar data passing the consistency calibration, carrying out integrity assessment on the fused navigation data, carrying out formatted distribution and storage aiming at navigation requirements of different maritime businesses, and providing navigation data marked with integrity grade after fusion for a comprehensive navigation service platform. The navigation data marked with the integrity level can be provided for the comprehensive navigation system, a unified supervision basis is provided for a manager, the navigation safety of the ship is ensured, and the marine traffic organization and the accurate space-time maritime service are comprehensively supported.

Inventors

• JIANG YI
• HU QING
• Huai Lvheng

Assignees

• 大连海事大学

Dates

Publication Date

20260508

Application Date

20221104

Claims (3)

1. 1. A multi-source navigation information fusion method based on space-time characteristics is characterized by comprising the following steps: Acquiring navigation data from different navigation systems and data sources, analyzing the acquired navigation data, and judging whether the analyzed navigation data are normal or not, wherein the navigation systems comprise an RBN-DGNSS system, a maritime CORS system, an AIS system and a Navtex system; Classifying the data with normal judging results according to information types, wherein the information types comprise ship related information, navigation path related information, navigation safety related information and hydrological related information, the ship related information comprises ship static information, ship dynamic information and ship path information, the navigation path related information comprises navigation mark information, navigation path information and navigation obstacle information, the navigation safety related information comprises navigation warning and navigation mark dynamic, and the hydrological related information comprises real-time hydrological information, forenotice hydrological information, real-time meteorological information and forenotice meteorological information; Performing rationality inspection on the classified navigation data, including inspection on the range of data values and inspection on the validity of the action time; carrying out space consistency and time consistency calibration on multisource heterogeneous similar data passing the rationality test; Carrying out data fusion on the multisource heterogeneous data calibrated through consistency, so as to generate fused navigation data; Performing integrity assessment on the fused navigation data, calculating an integrity grade according to preset integrity index parameters, and outputting navigation data meeting different user requirements by combining with preset data integrity grade assessment standards; Aiming at navigation requirements of different maritime businesses, formatting, distributing and storing navigation data meeting the requirements of users according to the requirements, and providing navigation data marked with integrity grade after fusion for a comprehensive navigation service platform; In the process of multi-source navigation aid information fusion processing, data alarm processing is carried out on the received alarm information, the alarm information is classified and classified, the alarm state is managed according to feedback of a comprehensive navigation aid service platform, and in the process of multi-source navigation aid information fusion processing, the data alarm processing is carried out on the received alarm information, wherein the data alarm processing comprises at least one of the following conditions: performing data alarm on navigation data with abnormal judging result, The data alarm is carried out on the multi-source heterogeneous data which do not pass the rationality test, Data alarms are performed on multi-source heterogeneous data that do not pass consistency calibration, And carrying out data alarm on the multi-source heterogeneous similar data which do not pass through the integrity evaluation.
2. 2. The method for multi-source navigation information fusion based on spatiotemporal features of claim 1, wherein the rationality test of the classified navigation data comprises testing the navigation data by monitoring the mean and variance in a sliding time window.
3. 3. A multi-source navigation information fusion system based on spatiotemporal features for implementing the method of claim 1 or 2, comprising: The navigation system comprises a multisource navigation data acquisition unit, a navigation system acquisition unit and a navigation system analysis unit, wherein the multisource navigation data acquisition unit is used for acquiring navigation data from different navigation systems and data sources, analyzing the acquired navigation data and judging whether the analyzed navigation data are normal or not; The system comprises a classification processing unit, a prediction processing unit and a prediction processing unit, wherein the classification processing unit is used for classifying data with normal judging results according to information types, the information types comprise ship related information, navigation path related information, navigation safety related information and hydrological weather related information, the ship related information comprises ship static information, ship dynamic information and ship course information, the navigation path related information comprises navigation mark information, navigation path information and navigation obstacle information, the navigation safety related information comprises navigation warning and navigation mark dynamic, and the hydrological weather related information comprises real-time hydrological information, forenotice hydrological information, real-time meteorological information and forenotice meteorological information; The rationality checking unit is used for rationality checking of the classified navigation data, and comprises checking of a data value range and checking of validity of the acting time; a consistency calibration unit for performing spatial consistency and temporal consistency calibration on the multisource heterogeneous homogeneous data passing the rationality test; The data fusion unit is used for carrying out data fusion on the multisource heterogeneous data calibrated through consistency so as to generate fused navigation data; The integrity evaluation unit is used for carrying out integrity evaluation on the fused navigation data, calculating an integrity grade according to preset integrity index parameters, and outputting the navigation data meeting different user requirements by combining with preset data integrity grade evaluation standards; The navigation data output unit is used for formatting, distributing and storing the navigation data meeting the user requirements according to the navigation requirements of different maritime businesses and providing integrated navigation data marked with integrity grade for the comprehensive navigation service platform; the data warning unit is used for carrying out data warning processing on the received warning information in the multi-source navigation aid information fusion processing process, carrying out grading and classification processing on the warning information and managing the warning state according to feedback of the comprehensive navigation aid service platform, wherein the data warning processing comprises at least one of the following conditions: performing data alarm on navigation data with abnormal judging result, The data alarm is carried out on the multi-source heterogeneous data which do not pass the rationality test, Data alarms are performed on multi-source heterogeneous data that do not pass consistency calibration, And carrying out data alarm on the multi-source heterogeneous similar data which do not pass through the integrity evaluation.

Description

Multi-source navigation information fusion method and system based on space-time characteristics Technical Field The invention relates to the technical field of maritime navigation service, in particular to a multi-source navigation information fusion method and system based on space-time characteristics. Background The marine navigation information is basic data for guaranteeing the navigation safety of ships and developing the management of water traffic organization. With the continuous emergence and development of various novel navigation technologies, such as very high frequency data exchange systems (VDES), offshore digital broadcasting (NAVDAT), and the like, navigation systems and services have been further complemented. However, the existing navigation systems are independent from each other and lack of a fusion coordination mechanism, so that various navigation information is difficult to fuse, the accuracy of port and coastal navigation service is seriously affected, and meanwhile, the deep and open sea navigation requirements cannot be responded in time. Therefore, the construction of the highly-trusted comprehensive navigation service support system not only accords with the development direction of e navigation shore-based integrated management, but also is a necessary trend of future maritime service. The navigation information with unified space and time, consistent standard and high credibility is a basic stone for constructing a comprehensive navigation service support system, and is a premise for providing high-quality comprehensive navigation service. However, at present, navigation information is derived from different navigation systems and external data sources, and because the time of each navigation system is not synchronous and the data reference is different, the problems that the navigation information is non-uniform in time and space and even has collision exist, and the like exist, and it is difficult to provide high-reliability uniform comprehensive navigation service for ship navigation and safety supervision. Disclosure of Invention The invention provides a multi-source navigation information fusion method and system based on space-time characteristics, which are used for solving the technical problems of non-uniform space-time and mutually conflicting navigation information caused by time non-synchronization and different data references of data from different sources in the prior art and providing highly-reliable space-time uniform navigation data for comprehensive navigation service. The invention adopts the following technical means: a multisource navigation information fusion method based on space-time characteristics comprises the following steps: Acquiring navigation data from different navigation systems and data sources, analyzing the acquired navigation data, and judging whether the analyzed navigation data are normal or not; classifying the data with normal judging results according to the information types; Performing rationality inspection on the classified navigation data, including inspection on the range of data values and inspection on the validity of the action time; carrying out space consistency and time consistency calibration on multisource heterogeneous similar data passing the rationality test; Carrying out data fusion on the multisource heterogeneous data calibrated through consistency, so as to generate fused navigation data; Performing integrity assessment on the fused navigation data, calculating an integrity grade according to preset integrity index parameters, and outputting navigation data meeting different user requirements by combining with preset data integrity grade assessment standards; Aiming at navigation requirements of different maritime businesses, the navigation data meeting the requirements of users are formatted, distributed and stored according to the requirements, and the navigation data marked with integrity level after fusion is provided for the comprehensive navigation service platform. Further, classifying the data with normal judging results according to the information types includes classifying according to ship related information, route related information, navigation safety related information and hydrological weather related information. Further, the rationality test of the classified navigational data includes testing the navigational data by monitoring the mean and variance within the sliding time window. Further, the method further comprises the steps of carrying out data alarm processing on the received alarm information, grading and classifying the alarm information, and managing the alarm state according to feedback of the comprehensive navigation service platform in the multi-source navigation information fusion processing process. Further, in the process of fusion processing of the multisource navigation assistance information, data alarm processing needs to be performed on the received alarm information, and t