Driving Support Device Using Front Radar for Intersection Turn
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Solution Overview
Problem
Existing driving support devices face delays in providing rear-side support when a host vehicle turns at an intersection, as the detection range of rear radars is limited, causing a delay in recognizing and responding to following vehicles.
Innovation Solution
A driving support device that uses a combination of front and rear detection units to recognize the state of a following vehicle before or during a direction change, allowing for earlier determination and provision of rear-side support, including controls like hazard lamp activation, headrest adjustment, and airbag preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rear radar is used to detect following vehicles, then the detection range is limited to the rear area, but this causes a delay in recognizing following vehicles when the host vehicle turns at an intersection
Solution Approach 1:
The front radar detects objects in the forward direction before the host vehicle completes the turn, identifying potential following vehicles in advance. This preliminary detection allows the system to prepare rear-side support measures before the following vehicle actually enters the rear detection zone, thereby reducing response delay while maintaining detection accuracy
Solution Approach 2:
The system expands detection from the traditional rear-only dimension to include the forward dimension using the front radar. By detecting objects in the forward direction and analyzing their trajectories, the system can identify following vehicles earlier in the turning process, effectively adding a spatial dimension to the detection coverage
2Adaptability or versatility
If the host vehicle turns right or left at a junction, then the speed difference between the host vehicle and following vehicle may be large, but this causes the following vehicle to get close quickly increasing collision risk
Solution Approach 1:
The system performs preliminary detection of following vehicles before the turn is completed, calculating the time-to-collision based on the speed difference and distance. This allows the system to activate rear-side support measures in advance, such as adjusting the headrest position or preparing the airbag, before the following vehicle closes the distance to a dangerous level
Solution Approach 2:
The system prepares protective measures in advance by adjusting the headrest to a rear-side support position or activating the airbag before a potential collision occurs. This beforehand cushioning reduces the impact of the collision by ensuring protective mechanisms are already in place when the following vehicle closes the distance quickly
Data Source
AI summary
A driving support device for a host vehicle that travels on a first road and makes a direction change, at a junction between the first road and a second road, by turning right or left is provided. The driving support device includes: a front detection unit configured to detect an object in front of the host vehicle; a recognition unit configured to recognize a state of another vehicle that travels on the second road toward the junction and that follows the host vehicle after the host vehicle completes the direction change, based on a detection result of the front detection unit obtained before or during the direction change; and a support determination unit configured to determine whether the host vehicle needs a rear-side support in relation to the state of the other vehicle, based on a recognition result of the recognition unit.