Driving Support Apparatus Rear Collision Prediction
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Solution Overview
Problem
Existing driving support apparatuses fail to effectively avoid collisions between a rear vehicle and an obstacle while the own vehicle is avoiding an obstacle in the front, as they do not consider the potential collision between the rear vehicle and the obstacle during the avoidance maneuver.
Innovation Solution
A driving support apparatus that includes an obstacle detector, a rear vehicle detector, a collision estimator, and an operation controller, which determines the best avoiding operation (lane change, steering, or braking) to avoid the front obstacle while assessing the risk of collision with the rear vehicle, using sensors like imaging cameras, millimeter wave radar, and LiDAR to predict positions and situations, and adjust the own vehicle's trajectory to prevent both collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the own vehicle performs steering control to avoid an obstacle in the same lane, then the own vehicle can avoid the obstacle, but a collision with a rear vehicle (e.g., motorcycle) may occur
Solution Approach 1:
The system performs preliminary detection of rear vehicles and predicts potential collision scenarios before executing avoidance maneuvers. The collision prediction unit calculates whether rear vehicles will collide with obstacles if the own vehicle performs lane changes or steering operations, and adjusts the avoidance strategy in advance to prevent such collisions.
Solution Approach 2:
The system introduces an intermediate evaluation step (collision prediction) between obstacle detection and avoidance execution. This intermediary assessment determines whether standard avoidance maneuvers are safe by predicting rear vehicle behavior, and only executes maneuvers that pass this safety check or selects alternative maneuvers.
2Reliability
If the own vehicle performs lane change operation to avoid an obstacle, then the own vehicle can avoid the obstacle, but the rear vehicle may collide with the obstacle in the original lane
Solution Approach 1:
The system continuously monitors rear vehicle position and speed, and uses this feedback to predict whether the rear vehicle will collide with the obstacle after the own vehicle changes lanes. Based on this feedback loop, the system determines whether lane change avoidance is appropriate or if alternative maneuvers should be selected.
3Reliability
If the own vehicle performs braking operation to avoid an obstacle, then the own vehicle can avoid the obstacle, but unnecessary braking increases energy consumption and reduces productivity
Solution Approach 1:
Instead of always performing full braking operations, the system applies partial braking or no braking when collision risk is low. The avoidance maneuver is scaled to the actual risk level, performing only the necessary amount of action to ensure safety while minimizing energy consumption and maintaining productivity.
Data Source
AI summary
In a driving support apparatus mounted in an own vehicle, an obstacle detector detects an obstacle present on a front side in a traveling lane. A rear vehicle detector detects a rear vehicle. An operation controller determines an avoiding operation by one of a lane change operation for changing to a lane adjacent to the traveling lane, a steering operation for steering in the traveling lane, and a braking operation for applying a brake in the traveling lane and controlling the own vehicle to perform the avoiding operation to avoid the obstacle. A collision estimator estimates presence or absence of a collision between the rear vehicle and the obstacle in a case in which the own vehicle performs the avoiding operation by one of the lane change operation and the steering operation. The operation controller determines the avoiding operation based on the estimated presence or absence of the collision.