Echo fused target track association method based on track state estimation

Abstract

The invention discloses an echo fused target track association method based on track state estimation.The method comprises the steps of conducting polar coordinate sector partitioning, conducting track starting/updating, conducting track prepushing and associated sector calculation, and judging the state of the prepushed track in an associated sector according to a corrected target fusion threshold and setting the state of the track as non-fusion, pre-fusion or fusion.Different track association strategies are adopted for the three track states; track-trace point association is conducted on the non-fusion track with the conventional nearest neighbor method; track association is conducted on the pre-fusion track with the target feature information assisted nearest neighbor method; for the fusion track, within the fusion wave gate range, feature information is used as the main basis for track association after echo defusion, the fusion track and a track cluster are updated in real time, and the fusion track and the track cluster are deleted if the number of tracks in the track cluster is lower than 2.By the adoption of the method, the probability of mis-tracking or track losing after target fusion can be reduced, and tracking stability can be improved.

Description

technical field [0001] The invention relates to a radar target tracking method, in particular to a track correlation method based on echo fusion target track state estimation. Background technique [0002] In the Vessel Traffic Service System (VTS for short), when a ship is navigating, especially in an inland waterway, two ships may cross or meet. In this case, the radar video echoes of two ships will be Fusion occurs, forming an echo. In this kind of phenomenon, in order to avoid collisions, ships will often maneuver, and the speed and course of the ship are likely to change. This poses a great challenge to the tracking of the target. Mistracking or track loss often occurs, which affects the ship's speed. Continuous stable tracking, which in turn affects the performance of the system's stable tracking. It has a certain impact on the water traffic supervision of VTS users. When accidents such as ship collisions may occur, the target ship cannot be notified in a timely and ...

AI Technical Summary

Problems solved by technology

In this kind of phenomenon, in order to avoid collisions, ships will often maneuver, and the speed and course of the ship are likely to change. This poses a great challenge to the tracking of the target. Mistracking or track loss often occurs, which affects the ship's speed. Continuous stable tracking, which in turn affects the performance of system stable tracking

It has a certain impact on the water traffic supervision of VTS users. When accidents such as ship collisions may occur, the target ship cannot be notified in a timely and accurate manner, which may lead to major accidents

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