Ship course and area estimation method based on Beidou navigation and data driving

Abstract

The invention discloses a ship course and area estimation method based on Beidou navigation and data driving. The ship course and area estimation method comprises the steps of: collecting 24-hour GNSS observation data at known points of the sea surface; obtaining an offline calibration data set; analyzing and screening the original observed quantity extracted from the GNSS observation data to obtain a screened sample set Z; inputting the sample set Z and the corresponding pseudo-range error into an adaptive neural network ANFIS for training to obtain a pseudo-range error regression model; inputting newly received GNSS observation data into the pseudo-range error regression model, predicting a pseudo-range error of a corresponding satellite under the epoch, obtaining a corrected pseudo-range observation value, and carrying out positioning settlement on the corrected pseudo-range observation value to obtain an accurate positioning solution; estimating the course of the ship; and delimiting a ship probability area. According to the method, the ship yaw condition can be monitored in real time according to the obtained ship navigation direction and the ship probability area, and the occurrence probability of marine traffic accidents is reduced.

Description

technical field [0001] The invention belongs to the technical field of navigation and positioning, and in particular relates to a ship heading and an area estimation method based on Beidou navigation and data drive. Background technique [0002] In recent years, maritime affairs are developing in the direction of electronic navigation integration, and autonomous navigation ships on the sea surface are gradually becoming popular. Although ship safety issues have been improved, there are still many problems in ship safety due to personnel negligence, misjudgment, and electronic equipment restrictions. risk. At present, the positioning and navigation of ships still depend on the Global Navigation Satellite System (GNSS). [0003] As an ideal maritime navigation tool, GNSS requires an accuracy of several meters (beach, wharf) to several hundred meters (on the way). The search and rescue difficulty, search and rescue manpower and material resources requirements and search and r...

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Problems solved by technology

[0013] 2a. The methods based on signal processing, antenna design and multi-source fusion all achieve multi-path mitigation by adding / modifying hardware, which has the problem of doubling equipment volume / cost. It is difficult to transform existing ship equipment, which is not conducive to its propagation in small and medium-sized Promotion on

[0014] 2b. The signal classification and elimination method based on machine learning. The existing methods are all based on city construction, and the signal type calibration method of the data set related to this method is based on the rich environmental characteristics of the city and relies on external geographic information data, so it is limited The characteristics of the experimental environment, and the distribution of signal types in the urban environment is quite different from that of the ocean. In the city, this method mainly improves the positioning accuracy by eliminating NLOS (Non-Line-of-Sight, non-line-of-sight reception) signals. However, in an open environment such as the ocean, the probability of NLOS is very low, and multipath interference is the main problem, so it is not suitable for marine environments

[0016] 3a. The method based on positioning error is disturbed by geodetic factors, measurement noise and meteorological conditions. In coastal areas where the measurement data is not reliable, this may affect the captain’s decision-making and cannot play the role of navigation assistance, which will lead to an increase in the accident rate.

Moreover, the ship probability area delineated according to the error has no directionality, which may lead to an excessively large envelope area of ​​the delineated area, greatly increasing the difficulty of search and rescue. If the ship loses contact, the rescue success rate will be greatly reduced

[0017] 3b, the method based on optimal scheduling does not fundamentally improve the success rate of search and rescue, and optimizing the scheduling in the wrong area may reduce the success rate of search and rescue

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