Vehicle Driving Assist Azimuth Angle Acceleration Suppression
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Solution Overview
Problem
Existing vehicle driving assist systems fail to effectively prevent abrupt acceleration due to driver missteps, especially in environments where obstacle detection sensors are inadequate, such as dense fog, rainfall, or at intersections without clear obstacles, leading to potential accidents.
Innovation Solution
A vehicle driving assist apparatus that utilizes a combination of map information storage, a position estimator, a crossing road detector, and an azimuth angle difference calculator to calculate and apply a higher degree of acceleration suppression when the azimuth angle difference between the vehicle's travel direction and the crossing road is narrow, without relying on obstacle recognition sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If obstacle detection sensors are used to detect missteps, then misstep prevention capability is improved, but detection reliability deteriorates in adverse weather conditions such as dense fog, rainfall, or at intersections without clear obstacles
Solution Approach 1:
The patent introduces map information as an intermediary element that mediates between the vehicle and the environment. Instead of directly detecting obstacles with sensors that fail in adverse conditions, the system uses pre-stored road map data to identify intersections and crossing roads, providing reliable detection information without direct environmental sensing.
Solution Approach 2:
The system performs preliminary action by pre-storing road map information including intersection locations and crossing road data before the vehicle reaches these locations. This allows the system to proactively identify situations requiring acceleration suppression without waiting for real-time obstacle detection, which fails in adverse weather conditions.
2Reliability
If acceleration suppression is applied at all intersections, then safety is improved, but unnecessary suppression occurs on straight roads reducing driving efficiency
Solution Approach 1:
The patent applies local quality by differentiating acceleration suppression application based on specific location characteristics. The system calculates azimuth angle differences between the vehicle's travel direction and crossing roads, applying suppression only when the azimuth angle difference indicates an intersection geometry where misstep danger exists, rather than uniformly at all intersections.
Solution Approach 2:
The system dynamically adjusts acceleration suppression based on real-time calculated azimuth angle differences. The suppression degree varies according to the geometric relationship between the vehicle's current path and crossing roads, allowing the system to adapt to different intersection configurations and maintain safety while avoiding unnecessary suppression on straight roads.
3Reliability
If retrofitting misstep preventing apparatus is implemented, then misstep prevention is improved, but economic burden on users increases
Solution Approach 1:
The patent achieves universality by making the existing accelerator pedal serve multiple functions: normal acceleration control and misstep prevention. The system utilizes existing vehicle sensors (accelerator position sensor, vehicle speed sensor, obstacle detection sensor) and combines them with map information processing to provide misstep prevention without requiring separate dedicated hardware, thereby reducing costs while maintaining effectiveness.
Data Source
AI summary
A vehicle driving assist apparatus includes an first calculator to calculate a degree of acceleration suppression, a controller to suppress target acceleration based on the degree of acceleration suppression, a map information storage to store road map information, an estimator to estimate a vehicle position and identify a traveling lane on the road map information, a detector to detect whether there is a crossing road ahead of the identified traveling lane, and a second calculator to calculate an azimuth angle difference between an azimuth of the crossing road where the own vehicle is about to turn and an azimuth in the traveling direction of the own vehicle. The acceleration suppression degree calculator makes a degree of acceleration suppression for suppressing the acceleration of the own vehicle higher then an azimuth angle difference becomes narrower based on the azimuth angle difference.