Intersection Driving Assistance with Staged Forward Verification
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Solution Overview
Problem
Existing driving assistance devices are inadequate in preventing encounter traffic accidents, particularly at intersections with poor visibility, where vehicles may not accurately recognize surrounding situations due to obstacles, pedestrians, or bicycles, leading to unsafe driving conditions after temporary stops.
Innovation Solution
A driving assistance device equipped with a forward recognizer, brake controller, and determiner that uses in-vehicle camera data and map information to perform brake and drive control, allowing vehicles to safely stop before a stop line and then slowly drive forward to a predetermined position, where the situation can be reassessed for safety before proceeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle stops before the stop line and then drives forward to check the situation, then the safety of the vehicle is improved, but the time required for the vehicle to pass through the intersection is increased
Solution Approach 1:
The vehicle performs preliminary safety checks by stopping before the stop line and slowly driving forward to verify the situation before fully proceeding. This preliminary action ensures safety by detecting obstacles, pedestrians, or bicycles in advance, while the controlled slow movement minimizes the time penalty compared to complete stops.
Solution Approach 2:
The vehicle dynamically adjusts its movement state, transitioning between stopping, slow forward movement for verification, and normal driving. This dynamic approach allows the vehicle to optimize the balance between safety verification and time efficiency based on real-time conditions detected by the forward recognizer.
2Measurement precision
If the vehicle continuously monitors the forward situation using the forward recognizer, then the detection precision of obstacles is improved, but the energy consumption of the vehicle is increased
Solution Approach 1:
The forward recognizer operates periodically rather than continuously, performing safety checks at key moments (when stopping before the stop line, when slowly driving forward to verify, and before proceeding). This periodic operation maintains detection precision for safety-critical moments while significantly reducing overall energy consumption compared to continuous monitoring.
3Reliability
If the vehicle slowly drives forward to verify the situation before proceeding, then the safety is improved, but the productivity of the vehicle is reduced
Solution Approach 1:
The slow forward movement serves as a preliminary verification action to ensure safety before the vehicle commits to full-speed progression through the intersection. This preliminary check prevents potential accidents while minimizing the impact on overall productivity by keeping the verification process brief and controlled.
Solution Approach 2:
The vehicle dynamically adjusts its speed based on the verification needs, using slow movement only when necessary for safety checks and transitioning to normal speed once safety is confirmed. This dynamic speed adjustment optimizes the balance between safety verification and productivity maintenance.
Data Source
AI summary
A driving assistance device includes a forward recognizer configured to recognize a forward situation of a vehicle, a brake controller configured to perform brake control, and a determiner configured to determine execution of the brake control and drive control based on target data obtained by the forward recognizer and/or from map information. The brake controller performs the brake control to stop the vehicle at a position before a stop line of a road surface, based on a recognition result from the forward recognizer. When the vehicle stops and the forward situation is determined to be safe the determiner slowly drives the vehicle to another position before a crossing road edge where the road on which the vehicle drives intersects with another road. When the vehicle is at the other position and the forward situation is determined to be safe, the determiner slowly drives the vehicle from the other position by a predetermined distance.