Pedestrian Collision Prevention via V2V Velocity Data and TTC Prediction
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Solution Overview
Problem
Conventional pedestrian collision prevention technologies only recognize suddenly appearing pedestrians and fail to predict and prevent collisions in advance, especially when pedestrians are hidden by parked or stopped vehicles.
Innovation Solution
An apparatus and method that includes a pedestrian sensing unit to detect pedestrians in advance, a communication unit to transmit velocity and direction information, a time-to-collision calculating unit to predict potential collisions, and a controller to operate warning systems and brake devices to prevent accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pedestrian sensing technology is used, then suddenly appearing pedestrians can be recognized, but collision prediction and prevention in advance is not possible
Solution Approach 1:
The system performs preliminary sensing of pedestrians in advance of potential collision situations. The pedestrian sensing unit continuously monitors areas around the vehicle, and the TTC calculating unit pre-calculates time-to-collision values before actual collision risk materializes, enabling proactive rather than reactive prevention
Solution Approach 2:
The system applies beforehand cushioning by issuing warnings to both pedestrians and drivers before collision actually occurs. The warning unit provides advance notification when TTC falls within threshold ranges, allowing parties to take preventive action before the harmful collision event happens
2Measurement precision
If pedestrian sensing is enhanced to detect hidden pedestrians, then collision prediction capability improves, but system complexity increases
Solution Approach 1:
The system segments the pedestrian detection and collision prediction function into distinct modular units: a pedestrian sensing unit for detecting pedestrians, a TTC calculating unit for computing time-to-collision, and a warning unit for issuing alerts. This segmentation allows each component to be optimized independently while maintaining overall system precision
Solution Approach 2:
The TTC calculating unit serves as an intermediary that processes raw sensing data from the pedestrian sensing unit and transforms it into actionable collision risk assessments. This intermediary layer simplifies the overall system architecture by centralizing the complex calculation logic in a dedicated component
3Reliability
If automatic braking intervention is implemented, then collision prevention effectiveness increases, but loss of driver control and system complexity increase
Solution Approach 1:
The system applies preliminary anti-action by automatically applying brakes when TTC falls within a critical threshold range, counteracting the potential collision before it occurs. This pre-emptive counter-action is triggered automatically based on calculated TTC values, preventing the harmful collision event
Data Source
AI summary
An apparatus for preventing a pedestrian collision accident, a system having the same, and a method thereof are provided. The apparatus includes a pedestrian sensing unit that senses a pedestrian moving into a dangerous area and calculates velocity and direction information of the pedestrian. A communication unit transmits the velocity and direction information of the pedestrian to a surrounding vehicle. A time-to-collision (TTC) calculating unit calculates a TTC using velocity and direction information of a subject vehicle and second velocity and direction information of the pedestrian, when the TTC calculating unit receives the second velocity and direction information of the pedestrian from another vehicle. A controller outputs based on the TTC a warning to a driver of the subject vehicle or the pedestrian.