AEB Warning Time Adjustment for Inclined Road Braking
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Solution Overview
Problem
Conventional Autonomous Emergency Braking (AEB) systems face challenges in accurately determining braking distance on inclined roads, leading to potential accidents due to incorrect distance detection by camera sensors when objects are present.
Innovation Solution
An autonomous emergency braking system that includes a gravity sensor and vehicle-speed sensor to determine the inclination of the road surface, with a controller adjusting the AEB warning time based on this inclination to ensure an appropriate braking distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional AEB system uses only camera sensors for distance detection, then the system structure remains simple, but the measurement precision of braking distance deteriorates on inclined roads
Solution Approach 1:
The patent combines multiple sensor types (camera sensor, gravity sensor, vehicle-speed sensor) into an integrated AEB system. The camera sensor detects objects while gravity and vehicle-speed sensors detect road inclination, and the controller merges this data to calculate accurate braking distances on inclined roads, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The controller acts as an intermediary that processes data from multiple sensors and calculates braking distance using a formula that incorporates road inclination angle. This intermediary computation layer transforms raw sensor data into accurate braking distance measurements, enabling precise detection without requiring direct complex sensor arrangements.
2Reliability
If the AEB warning time is fixed for flatland conditions, then the control logic remains simple, but the reliability of collision avoidance deteriorates on inclined roads
Solution Approach 1:
The patent implements dynamic adjustment of AEB warning time based on detected road inclination. Instead of a fixed warning time for flatland conditions, the system continuously adapts the warning time parameter according to the gravity sensor data and calculated inclination angle, ensuring reliable collision avoidance across varying road conditions while maintaining manageable control logic through parameter-based adaptation.
Solution Approach 2:
The system changes the AEB warning time parameter based on road inclination angle detected by the gravity sensor. The controller calculates different warning times corresponding to different inclination angles, allowing the system to maintain high reliability across various road conditions by dynamically adjusting this critical parameter rather than using a fixed value.
3Adaptability or versatility
If the AEB system assumes flatland conditions, then the system design remains simple, but the adaptability to different road conditions deteriorates
Solution Approach 1:
The patent creates a universal AEB system that functions across multiple road conditions (flatland, uphill, downhill) by integrating a gravity sensor for inclination detection. The system uses the detected inclination angle to universally apply appropriate braking distance calculations and warning time adjustments, enabling the same hardware configuration to adapt to various road conditions without requiring condition-specific subsystems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively adjusts AEB warning times to secure efficient braking distances, reducing the risk of accidents by accounting for road inclinations and improving the accuracy of collision avoidance with objects.
Implementation Method 1
a gravity sensor detecting a force of gravity applied to a host vehicle
Implementation Method 2
a vehicle-speed sensor detecting a vehicle speed of the host vehicle
Data Source
AI summary
The present disclosure relates to an autonomous emergency braking system and a method. More specifically, the autonomous emergency braking system according to the present disclosure includes: a sensor that includes a gravity sensor detecting a force of gravity applied to a host vehicle and a vehicle-speed sensor detecting a vehicle speed of the host vehicle; an inclination determiner that determines an inclination of a road surface on which the host vehicle is traveling based on the vehicle speed of the host vehicle and the force of gravity; and a controller that adjusts an AEB warning time based on the determined inclination of the road surface.