Radar Image Processing Device for Approaching Target Detection
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Solution Overview
Problem
Current radar systems face challenges in intuitively distinguishing approaching targets from stationary objects, leading to increased complexity and costs due to complex processing requirements and false alarms from non-threatening targets entering the alarm range.
Innovation Solution
An image processing device that includes a relative trail image memory and an approaching target object determination module to differentiate approaching targets by analyzing relative trail data and displaying them distinctively, reducing the need for complex calculations and minimizing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If complex processing operations such as acquisition and tracking of target objects are implemented to display intuitive collision avoidance information, then the information display quality is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts only the essential information needed for collision avoidance - specifically the relative position and movement direction of target objects - and displays this information in a simplified format. Rather than implementing full acquisition and tracking operations, the system extracts and displays only the critical relative motion data that operators need to assess collision risk, thereby reducing processing complexity while maintaining effective collision avoidance information display.
2Reliability
If alarm systems detect all target objects entering the alarm range, then the detection coverage is improved, but the false alarm rate increases
Solution Approach 1:
The patent applies different detection criteria to different situations by analyzing the movement direction of each target object relative to the own ship. Rather than uniformly alarming for all targets in the alarm range, the system evaluates the relative motion characteristics and generates alarms only for targets whose movement direction indicates potential collision risk, thereby reducing false alarms while maintaining comprehensive detection coverage.
3Loss of information
If trail display shows all target object movements, then the display completeness is improved, but the difficulty of identifying approaching targets increases
Solution Approach 1:
The patent employs asymmetric display treatment for different types of target movements. Trails of target objects are displayed with visual differentiation based on their movement direction relative to the own ship - particularly highlighting trails of approaching targets versus receding or stationary targets. This asymmetric visualization allows operators to quickly identify which trails represent collision risks without needing to analyze each trail individually, thus maintaining display completeness while reducing identification difficulty.
Data Source
AI summary
This disclosure provides an image processing device, which includes a relative trail image memory for storing a relative trail data group indicating relative changes in position of a target object detected by echo signals obtained corresponding to detection signals transmitted while changing a transmitting azimuth direction, with respect to a transmitting position from which the detection signals are transmitted, and an approaching target object determination processing module for determining whether the target object detected with the detection signals is an approaching target object that approaches the transmitting position based on relative trail data existing on the same sweep line among the relative trail data group stored in the relative trail image memory.