Driving Assistance Warning Suppression During Active Steering
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Solution Overview
Problem
Existing driving assistance systems often issue discomforting warnings when the driver's consciousness is clear, even if the vehicle wanders due to the system's steering, leading to unnecessary driver discomfort.
Innovation Solution
The driving assistance device includes an execution determination unit that assesses whether the assistance is being performed, adjusting the warning issuance criteria to minimize warnings when the system is actively steering the vehicle, thereby reducing driver discomfort by setting the warning to a stop state or reducing stimulation during assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lane keeping device performs driving assistance by generating steering torque, then the vehicle position is maintained in the lane, but the host vehicle may wander due to rapid changes in steering angle or lateral position, making it difficult to determine whether the wandering is caused by driver operation or system steering
Solution Approach 1:
The patent introduces a determination unit as an intermediary component that analyzes steering angle variations and vehicle position changes to distinguish between driver-induced wandering and system-induced wandering. This mediator processes multiple input signals (steering angle, lateral position, driving assistance execution status) to generate an accurate consciousness degradation determination, resolving the ambiguity caused by the lane keeping device's active steering intervention
2Measurement precision
If the control unit detects carelessness based on steering angle variation and issues a warning, then driver carelessness is detected, but warnings are issued even when the driver's consciousness is clear and the vehicle wanders due to lane keeping device steering
Solution Approach 1:
The patent implements a feedback mechanism where the determination unit continuously monitors steering angle variations and vehicle position changes, and this information feeds back to the warning control unit. The warning control unit uses this feedback to dynamically adjust warning issuance decisions based on the current driving assistance execution status, thereby avoiding false warnings that cause driver discomfort while maintaining accurate carelessness detection
Solution Approach 2:
The patent makes the warning issuance criteria dynamic by adjusting them based on the driving assistance execution status. When driving assistance is detected as executing, the system adopts different determination criteria compared to when it is not executing, allowing the warning system to adapt its sensitivity and avoid issuing warnings during system-controlled steering operations
3Measurement precision
If the arousal level estimation part estimates driver arousal level from face images, then driver arousal level is monitored, but warnings may be issued when the driver is actually alert but the vehicle wanders due to system steering
Solution Approach 1:
The patent merges multiple determination approaches by combining arousal level estimation from face images with steering angle variation analysis and driving assistance execution status monitoring. This multi-factor combination allows the system to cross-validate warnings and reduce false positives, ensuring that warnings are only issued when both the arousal level indicates degradation and the wandering pattern is consistent with driver carelessness rather than system steering
Data Source
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AI summary
In a driving assistance device 1, when an execution determination unit 12 determines that a driving assistance unit 11 performs driving assistance, a consciousness degradation determination unit 13 performs control such that a warning unit 9 is less likely to issue a warning than that when the driving assistance is not performed. Therefore, even when the position of a host vehicle is changed by the steering of the host vehicle by a driving assistance unit 11, it is possible to reduce the discomfort of a driver due to a warning.