2D Radar 3D Coordinate Determination via Tilting Angle
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Solution Overview
Problem
Conventional 2D radar devices are ineffective in monitoring moving targets along the vertical direction, particularly during perimeter breaches, as they can only measure distance and angle in the X-Y plane, leading to reduced detection efficiency and increased costs when trying to replace 3D radar systems.
Innovation Solution
A system and method that utilize a 2D radar device with detection assemblies mounted at a known height and tilting angle to determine a 3D coordinate of a moving target by transforming 2D coordinates into a 3D coordinate system, allowing for effective vertical detection and alarm initiation when a target exceeds a preset height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a 2D radar device is used to reduce cost, then device cost is reduced, but detection capability in vertical direction deteriorates
Solution Approach 1:
The patent transforms the 2D detection capability into 3D detection capability by mounting the 2D radar at a tilting angle relative to the horizontal plane. This dimensional transformation allows the radar to detect targets in the vertical direction by projecting the tilted detection plane onto the 3D space, resolving the contradiction between using a simpler 2D device and achieving 3D detection capability.
2Ease of manufacture
If a 2D radar device is used instead of 3D radar, then device cost is reduced, but measurement precision of vertical position deteriorates
Solution Approach 1:
By mounting the 2D radar at a known tilting angle, the system creates a geometric transformation relationship between the 2D detection coordinates and the 3D space coordinates. This allows precise calculation of vertical position through coordinate transformation, maintaining measurement precision while using a lower-cost 2D device.
Solution Approach 2:
The patent introduces a coordinate transformation mechanism as an intermediary between the 2D radar detection and 3D position determination. The transformation uses the known tilting angle and mounting height to convert 2D measurements into accurate 3D coordinates, enabling precise vertical position measurement without requiring a complex 3D radar.
3Reliability
If detection assemblies are mounted at a tilting angle, then vertical detection capability is improved, but device complexity increases
Solution Approach 1:
The patent changes the mounting parameters of the 2D radar, specifically the tilting angle and mounting height, to optimize vertical detection capability. By carefully selecting these parameters, the system achieves effective 3D detection while keeping the mounting configuration relatively simple and the calculation of transformation relationships straightforward.
Data Source
AI summary
System and method for determining a 3D coordinate of a moving target are provided. The system may obtain 2D detection data of the moving target generated by a 2D detection device including two detection assemblies that are mounted at a known height above a horizontal plane along a first axis that forms a tilting angle with the horizontal plane. The system may determine a 2D coordinate of the moving target in a first coordinate system including the first axis and a second axis that is perpendicular to the first axis based on the 2D detection data. The 2D coordinate of the moving target may include a first value of the first axis and a second value of the second axis. The system may determine the 3D coordinate of the moving target in a second coordinate system based on the 2D coordinate, the tilting angle, and the known height.