Collision Point Calculation for Side-Impact Brake Deceleration
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Solution Overview
Problem
Existing advanced driver assistance systems (ADAS) do not adequately address side collisions, particularly those involving vulnerable areas like the B-pillar, and emergency brake assist systems apply full brake deceleration without considering the risk, often colliding with these areas, leading to severe injuries.
Innovation Solution
A method to calculate collision points by defining areas of major risk, predicting vehicle movements, and applying customized deceleration levels based on these calculations to avoid vulnerable areas, using a collision point processing unit and actuation unit to manage emergency brake assist deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emergency brake assist systems apply full brake deceleration to prevent collisions, then collision avoidance capability is improved, but collision occurs in vulnerable areas such as the B-pillar causing severe injuries
Solution Approach 1:
The patent applies local quality by differentiating between various collision zones on the vehicle body and assigning different risk weights to each area. The system identifies vulnerable areas such as the B-pillar, A-pillar, and roof rail as high-risk zones, while other areas are classified as low-risk. This enables the emergency brake assist system to adjust deceleration strategies based on the specific collision risk profile of different vehicle regions, thereby avoiding severe injuries by preventing collisions in vulnerable areas while still maintaining effective collision avoidance capability.
2Device complexity
If collision point calculation uses general collision detection without area-specific analysis, then system complexity is reduced, but inability to identify vulnerable areas leads to inadequate prevention of side crashes
Solution Approach 1:
The patent implements segmentation by dividing the vehicle body into multiple distinct collision risk areas, including high-risk zones (B-pillar, A-pillar, roof rail) and low-risk zones. Each segment is assigned specific geometric boundaries and risk characteristics. This segmentation allows the collision detection system to evaluate each area independently and identify collisions in vulnerable regions, thereby improving side crash prevention capability while maintaining manageable system complexity through modular area definitions.
3Loss of time
If emergency brake assist applies maximum deceleration without considering collision risk distribution, then response time is reduced, but collision occurs in high-risk areas causing severe injuries
Solution Approach 1:
The patent applies dynamics by making the deceleration strategy adaptive rather than static. The emergency brake assist system dynamically adjusts the deceleration profile based on real-time collision risk assessment across different vehicle areas. When a potential collision is detected, the system evaluates which areas are at risk and modifies the deceleration magnitude and timing accordingly. This dynamic approach enables the system to maintain fast response times while avoiding maximum deceleration scenarios that would result in collisions with vulnerable body parts.
Data Source
AI summary
A method of calculating a collision point between an ego vehicle and a target vehicle and to emergency-brake-assist deceleration using the calculation. The calculation defines areas of collision risk of the ego vehicle, determines movement of the ego and target vehicle, calculates times-to-collision for first and second ego-vehicle intersecting points and a target-vehicle intersecting point to an intersection point. A risk collision point condition establishes that the collision point is inside an ego vehicle area if the first time-to-collision for the first ego-vehicle intersecting point reaching the intersection point is less than a third time-to-collision for the target-intersection point reaching the intersection point, and the second time-to-collision for the second ego-vehicle intersecting point reaching the intersection point is greater than the third time-to-collision for the target intersection point reaching the intersection point. A deceleration level is selected based on the collision points satisfying the risk collision point condition.