Vehicle Deceleration Control for Driver Abnormality Collision Risk
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems face challenges in reliably avoiding collisions when a driver's abnormality is detected, as they often result in unnecessary deceleration due to limited activation situations of collision damage mitigation brakes.
Innovation Solution
A vehicle control device with a special mode that expands the range for identifying potential collision objects and adjusts detection criteria when a driver abnormality is detected, increasing the likelihood of deceleration control activation while minimizing unnecessary deceleration in normal modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collision damage mitigation brake is activated with limited situations to avoid erroneous deceleration, then false activation is reduced, but collision avoidance reliability deteriorates when driver abnormality occurs
Solution Approach 1:
The patent dynamically adjusts the target candidate identification range based on driver status. When driver abnormality is detected, the system switches to a special mode that expands the identification range, allowing deceleration control to be activated more readily. This dynamic adaptation resolves the contradiction by making the system sensitive to driver state and adjusting its activation criteria accordingly.
Solution Approach 2:
The system changes the parameter of target candidate identification range between normal mode and special mode. In normal mode, the range is limited to reduce false activation. In special mode (driver abnormality detected), the range is expanded to increase activation probability. This parameter change allows the system to optimize for different operational contexts.
2Reliability
If the target candidate identification range is expanded in special mode, then collision detection probability increases, but false positive rate may increase
Solution Approach 1:
The system dynamically adjusts identification criteria based on driver status. In special mode, while the range is expanded, the system maintains appropriate detection thresholds and continues to use multiple sensors (camera, radar) to verify target candidates. This dynamic adjustment allows broader monitoring without sacrificing precision through improper threshold settings.
Solution Approach 2:
The system uses feedback from multiple sensors (camera, radar, LIDAR) to continuously monitor and verify target candidates. Even in special mode with expanded range, the feedback mechanism ensures that only genuine collision risks trigger deceleration control, maintaining measurement precision while improving detection probability.
Data Source
AI summary
A vehicle control device includes a first control unit that executes, when an abnormality of a driver of a vehicle is detected, stop control, a second control unit that executes, when the vehicle is determined to have a risk of collision, deceleration control, a determination unit that identifies an object around the vehicle as a target candidate of the collision and determines whether or not there is the risk of the collision with the identified target candidate, and a setting unit that sets, when the abnormality is detected, an operation mode of the deceleration control to a special mode from a normal mode, the normal mode provided for cases in which the abnormality is undetected. The determination unit expands a range for identifying the object around the vehicle as the target candidate of the collision in the special mode as compared with the range in the normal mode.