Multi-Radar Velocity Detection via Overlapping Ranges
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Solution Overview
Problem
Conventional single-radar systems cannot detect the velocity of targets moving perpendicular to the line-of-sight direction, limiting the determination of both moving direction and velocity vector of targets.
Innovation Solution
A radar device comprising two radars positioned to have partially overlapping detection ranges, with a detection unit that combines the detection results from both radars to determine the moving direction and velocity vector of targets by integrating their data in an x-y space, allowing for the detection of velocities in directions other than the line-of-sight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single radar is used to detect target velocity based on Doppler effect, then the velocity in the line-of-sight direction can be detected, but the velocity in the direction perpendicular to the line-of-sight direction cannot be detected
Solution Approach 1:
The patent transitions from single-radar detection to a multi-radar spatial arrangement where radars are positioned at separated locations with overlapping detection ranges. This spatial dimensionality enables the system to resolve velocity components in directions perpendicular to the line-of-sight by analyzing detection results from multiple radar positions simultaneously, thereby achieving complete velocity vector measurement capability.
2Device complexity
If only a single radar is used, then the device complexity is low, but the moving direction and velocity vector of the target cannot be obtained
Solution Approach 1:
The patent combines detection results from multiple radars positioned at separated locations with overlapping detection ranges. The detection unit integrates information from all radars to reconstruct complete velocity vectors and moving directions, thereby recovering information that would be lost in single-radar systems while maintaining manageable system complexity through coordinated multi-radar operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the accuracy of target velocity and direction detection, particularly improving low-angle measurement accuracy and enabling the detection of velocities in directions perpendicular to the line-of-sight, thereby improving the estimation of target outlines.
Implementation Method 1
the velocity of the target can be detected based on a change in frequency due to the Doppler effect
Implementation Method 2
a phenomenon in which, when a reflected wave from the existing target is further reflected by, for example, a wall or guardrail and then received by a receiving antenna
Data Source
AI summary
A radar device includes a first radar and a second radar that are arranged at positions separated from each other, and of which detection ranges are at least partially overlapped; and a detection unit that detects at least one of a moving direction and a velocity vector of a reflection point existing in an overlapped portion of the detection ranges, based on a first detection result of the first radar and a second detection result of the second radar.