Target detection and recognition method and system in low-altitude and sea-surface environments

Abstract

The invention provides a target detection identification method and system in a low altitude and sea surface environment. The method comprises steps of establishing a space virtual reference coordinate system and carrying out self-calibration; for different measurement conditions, using corresponding coordinate conversation methods, allowing data of measurement points and targets to be establishedin the space virtual reference coordinate system; calculating all geometrical parameters of each target and coordinates of the target; through two radars in different heights, carrying out self-calibration and blind supplementation; by use of a de-noising method of interframe correlation, processing radar signals; and carrying out information fusion processing on multi-source target data in the radars and carrying out target detection and tracking. According to the invention, by use of dynamic self-calibration technology, and adaptive detection and recognition technology, strong sea clustersare inhibited; positioning precision and recognition rate of the targets are improved; target detection ability for observing sea area during day and night in a severe weather environment is improved;and effective detection, tracking, recognition and law enforcement monitoring evidence obtaining for small targets on the sea surface and low-altitude small targets like unmanned aerial vehicles areachieved.

Description

technical field [0001] The invention relates to the technical field of radar detection and recognition, in particular to a target detection and recognition method and system in low-altitude and sea-surface environments. Background technique [0002] As we all know, radars working in sea and low-altitude environments face serious influences from low-altitude and sea-surface environments, such as ground and ocean clutter, which lead to low detection and recognition accuracy for targets. Especially for small sea targets such as periscopes, drifting mines, frogmen, octopus boats, and low-altitude small targets such as drones, the speed of such targets can be fast or slow, and the radar reflection area is small because of their small size, and radar short-range amblyopia In addition to the low-altitude and sea-surface environment, it is difficult to be found, tracked and identified. [0003] Explanation of terms: [0004] AIS: Automatic Identification System, automatic identifi...

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Problems solved by technology

[0002] As we all know, radars working in sea and low-altitude environments face more serious low-altitude and sea environment influences, such as ground and ocean clutter, which lead to low detection and recognition accuracy for targets

Especially for small sea targets such as periscopes, drifting mines, frogmen, octopus boats, and low-altitude small targets such as drones, the speed of such targets can be fast or slow, and the radar reflection area is small because of their small size, and radar short-range amblyopia Due to the influence of low-altitude and sea-surface environment, it is difficult to be found, tracked and identified

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