Rear-Side Radar Track Validation for Parking Exit Collision Warnings
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Solution Overview
Problem
Current driver assistance systems face challenges in accurately preventing rear-side collisions when a vehicle is departing from a parking space, often resulting in false warnings due to erroneous detection of objects by radar sensors.
Innovation Solution
A driver assistance apparatus equipped with first and second radar sensors mounted to provide views of the left and right rear sides, respectively, processes detection data to generate tracks and identifies potentially erroneous detections, thereby warning of collisions only in the direction of normally detected tracks, and controls the vehicle's cluster, side mirror indicator, and power steering to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar sensors are used to detect objects in rear sides during vehicle departure, then collision prevention capability is improved, but false warnings increase due to erroneous detections
Solution Approach 1:
The patent combines data from multiple radar sensors (first radar sensor for left rear side, second radar sensor for right rear side) to generate detection points and tracks. By merging information from both sensors, the system cross-validates detections and identifies erroneous tracks through comparison, thereby reducing false warnings while maintaining collision prevention capability
Solution Approach 2:
The system implements a feedback mechanism where detection results from both radar sensors are processed to generate tracks, then evaluated for consistency. The controller compares longitudinal distances and transverse speeds between tracks from different sensors, using this feedback to identify and eliminate erroneous detections before issuing collision warnings
2Area of stationary object
If multiple radar sensors are deployed to cover left and right rear sides, then detection coverage is improved, but system complexity increases
Solution Approach 1:
The patent employs multiple radar sensors that serve dual purposes: each sensor not only detects objects in its primary direction (left or right rear side) but also provides data for cross-validation with the other sensor. This multi-functionality allows the system to maintain comprehensive detection coverage while using the same hardware resources for error detection and verification
Solution Approach 2:
The detection area is segmented into distinct zones covered by different radar sensors, with the first radar sensor covering the left rear side and the second radar sensor covering the right rear side. This segmentation allows independent processing of detection data from each sensor while maintaining overall system coordination through the controller
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
Effectively assists drivers in preventing rear-side collisions while departing from a parking space by accurately distinguishing between true and erroneous detection tracks, reducing the risk of false warnings and collisions.
Implementation Method 1
a first radar sensor mounted to a vehicle and having a view of a left rear side outside the vehicle. The first radar sensor is configured to output first detecting data. A second radar sensor is mounted to the vehicle and has a view of a right rear side outside the vehicle
Data Source
AI summary
A driver assistance apparatus includes a first radar sensor having a view of a left rear side outside the vehicle and a second radar sensor having a view of a right rear side outside the vehicle. The first radar sensor is configured to output first detecting data and the second radar sensor is configured to output second detecting data. A controller is configured to process the first and second detecting data, to generate a plurality of detection points based on the processing, to generate a first track and a second track based on the plurality of detection points, to identify a track that is normally detected and a track that is erroneously detected among the first track and the second track, and to warn of a collision in a direction located on the normally detected track.