Rear Cross Collision Detection Using Radar Obstacle Identity Merging
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Solution Overview
Problem
Conventional rear cross collision warning systems using radar technology often incorrectly recognize a single obstacle as multiple obstacles, leading to unreliable collision detection and incorrect warnings due to the recognition of reflection points close to the vehicle.
Innovation Solution
A rear cross collision detection system that includes an obstacle detection unit, an identity determination unit, and a collision determination unit to differentiate between multiple obstacles and determine the possibility of collision based on position and speed differences, moving direction estimation, and reliability analysis, using radar sensors located at the rear-end portions of a vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar is used to detect obstacles, then obstacle detection capability is improved, but a single obstacle may be recognized as multiple obstacles
Solution Approach 1:
The patent merges multiple detection results from different radar sensors (right and left rear radars) to identify and consolidate reflections from the same obstacle. By combining detection data and comparing reflection points across multiple sensors, the system consolidates multiple detections of the same obstacle into a single unified obstacle identification, thereby maintaining high detection capability while improving recognition accuracy.
2Area of stationary object
If multiple reflection points of a long obstacle are detected, then detection coverage is improved, but false collision warnings occur
Solution Approach 1:
The patent introduces an identity determination unit as an intermediary between obstacle detection and collision determination. This unit acts as a mediator that receives detection results from multiple radar sensors, analyzes whether multiple reflection points belong to the same obstacle, and provides corrected obstacle information to the collision determination unit, thereby preventing false collision warnings while maintaining comprehensive detection coverage.
Solution Approach 2:
The system implements feedback mechanisms where detection results are continuously analyzed and validated. The identity determination unit provides feedback on whether detected obstacles are unique or duplicate reflections, and this information feeds back into the collision determination process to adjust warning generation, thereby reducing false warnings while maintaining detection sensitivity.
3Productivity
If conventional RCCW technology is used, then obstacle detection is achieved, but driver warning reliability is reduced
Solution Approach 1:
The patent segments the obstacle detection and collision determination processes into distinct functional units. The obstacle detection unit handles efficient detection using radar, while the separate identity determination unit handles the complex task of validating obstacle uniqueness, and the collision determination unit handles safety-critical decisions. This segmentation allows each unit to specialize, improving overall system reliability without sacrificing detection efficiency.
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
Improves the reliability of collision detection by accurately identifying a single obstacle and estimating its moving direction, reducing false warnings and enhancing driver safety by providing accurate collision alerts.
Implementation Method 1
the obstacle detection unit may be connected to radar sensors, respectively located at rear-end portions of both lateral sides of a vehicle, in order to detect the position of the obstacle located behind or beside the vehicle
Implementation Method 2
configured to receive an electromagnetic wave reflected from a reflection point of an obstacle in order to detect the position of the obstacle
Data Source
AI summary
The present disclosure provides a rear cross collision detection system and method. The rear cross collision detection system includes an obstacle detection unit configured to receive an electromagnetic wave reflected from a reflection point of an obstacle in order to detect the position of the obstacle, an identity determination unit configured to, when a plurality of obstacles is detected by the obstacle detection unit, determine whether the plurality of obstacles is the same object based on the positions or speeds of the detected obstacles, and a collision determination unit configured to determine the possibility of a collision with the plurality of obstacles detected by the obstacle detection unit based on the result of the determination by the identity determination unit.