Vehicle Control Apparatus Dynamic Threshold Adjustment
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Solution Overview
Problem
Existing vehicle control systems fail to accurately determine dangerous driving conditions, such as drowsiness or inattentive driving, due to reliance solely on driver-state information without considering road-surface conditions, leading to inappropriate determinations in varying environments.
Innovation Solution
A vehicle control apparatus that includes a driver state-value detection processor, road-surface-state detection processor, threshold setting processor, and determination threshold changing processor, which detects driver states and road-surface conditions to set and adjust determination thresholds, providing real-time warnings for dangerous driving based on both driver attention levels and road-surface states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If determination thresholds are set based solely on driver-state information, then the system is simple to operate, but the accuracy of dangerous driving detection deteriorates in varying road conditions
Solution Approach 1:
The determination threshold is made dynamic by automatically adjusting it based on detected road surface states. The system transitions from a static threshold to a dynamic one that adapts to environmental conditions, resolving the contradiction between detection accuracy and system complexity through automated adaptation rather than manual adjustment.
Solution Approach 2:
The system changes the determination threshold parameter based on road surface state detections. By modifying the threshold parameter dynamically according to environmental conditions (wet, dry, snowy roads), the system maintains high detection accuracy without requiring complex manual intervention mechanisms.
2Reliability
If fixed determination thresholds are used, then the system is easy to manufacture and implement, but the reliability of dangerous driving determination deteriorates when road conditions vary
Solution Approach 1:
The system performs self-adjustment of the determination threshold based on its own detections of road surface states. By using its built-in detection capabilities to automatically modify its operational parameters, the system improves reliability without requiring external complex adjustment mechanisms.
Solution Approach 2:
The system implements a feedback loop where detection results of road surface states feed back into the adjustment of the determination threshold. This closed-loop control mechanism ensures reliable dangerous driving determination across varying conditions while maintaining manageable system complexity through automated feedback-based adjustment.
3Measurement precision
If the system monitors only driver state values, then the device complexity is low, but the measurement precision of dangerous driving detection deteriorates due to lack of environmental context
Solution Approach 1:
The system merges driver state detection with road surface state detection into a unified dangerous driving determination process. By combining these detection functions and integrating their results, the system achieves higher measurement precision without proportionally increasing device complexity, as the additional detection capability leverages existing system resources.
Data Source
AI summary
A vehicle control apparatus to be applied to a vehicle includes a driver state-value detection processor, a road-surface-state detection processor, a threshold setting processor, a dangerous-driving determination processor, and a determination threshold changing processor. The driver state-value detection processor detects a state value of a driver who drives the vehicle. The road-surface-state detection processor detects a road-surface state of a road on which the vehicle is traveling. The threshold setting processor decides, based on the state value, one or more determination thresholds of a state to be determined as occurrence of dangerous driving. The dangerous-driving determination processor determines that the dangerous driving is occurring in a case where the state value is present within a range outside any of the one or more determination thresholds for a predetermined time period or more. The determination threshold changing processor changes the one or more determination thresholds based on the road-surface state.