Detecting method for positioning precision of deep sea ultrashort baseline

Abstract

The invention mainly relates to a detecting method for the positioning precision of a deep seal ultrashort baseline, and belongs to the field of hydroacoustic positioning. The method comprises that an ultrashort baseline acoustic matrix measures distances to a beacon in different measuring points, and GPS data of the different measuring points is collected; a geodetic coordinate of a seabed beacon is calculated by utilizing the GPS data and the distance information of the different measuring points; on the basis of the geodetic coordinate, a geodetic of a waterborne vessel is inversed according to an ultrashort baseline principle; GPS data of the waterborne vessel is selected to form a reference track; and a shortest distance of a connecting line between the geodetic coordinate of the waterborne vessel and the GPS data is calculated; and the calculated shortest distance is used to measure the positioning precision of an ultrashort baseline system. On the basis that the beacon position is resolved in an intersected manner, the ultrashort baseline principle is used to calculate the coordinate of the acoustic matrix, and the shortest distance of the GPS track of the acoustic matrix is compared to obtain the calculating precision; and the method can be widely applied to the aspects of object searching and underwater beacon navigation.

Description

technical field [0001] The invention belongs to the field of underwater acoustic positioning, and mainly relates to a deep-sea ultra-short baseline positioning accuracy inspection method. Background technique [0002] When the ultra-short baseline positioning system works at sea, it often occurs that the underwater operation fails and the field data is misjudged due to the inability to judge the positioning accuracy of the system. The conventional ultra-short baseline positioning system does not provide the accuracy inspection standard at sea, and most of them use the dispersion of underwater beacon positioning to evaluate the positioning accuracy. However, the present invention uses GPS data as a standard, and can effectively and visually display the positioning accuracy of the system. [0003] In CNKI, the Chinese academic literature network publishing database, the public reports related to the application of the present invention that can be retrieved mainly include: a ...

AI Technical Summary

Problems solved by technology

However, this method does not give the positioning accuracy of a single measurement in real time, but a data post-processing method

[0004] For the deep-sea ultra-short baseline positioning accuracy evaluation method, the existing methods have at least two shortcomings: First, the conventional method does not clearly provide a positioning accuracy evaluation method, but only uses the statistical results of multiple measurements of fixed points as the accuracy evaluation method, and there is no fixed scale standard; but the existing ultra-short baseline positioning accuracy evaluation method using long baseline intersection is a post-processing method, which cannot evaluate the accuracy of real-time measurement point results

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