Driver Attention-Based Lead Vehicle Start Notification
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Solution Overview
Problem
Existing vehicle-to-vehicle distance warning systems uniformly notify drivers when a predetermined distance is reached, regardless of the driver's attention state, leading to delayed notifications if the driver is distracted or early notifications if the driver is attentive.
Innovation Solution
A notification device that determines whether the driver is visually checking the forward direction and adjusts the notification mode, including timing, presence, and method based on the driver's attention state, providing earlier notifications when the driver is not attentive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the predetermined distance is set to be long, then the notification covers more cases, but the notification is delayed when the driver is looking aside or dozing
Solution Approach 1:
The notification distance threshold is dynamically adjusted based on the driver's visual state. When the driver is determined to be visually checking the forward direction, a first (longer) distance threshold is used. When the driver is not visually checking the forward direction, a second (shorter) distance threshold is used. This dynamic adjustment resolves the contradiction by adapting the notification timing to the driver's actual attention state, ensuring timely notifications when needed while avoiding unnecessary early notifications when the driver is already attentive.
Solution Approach 2:
The system changes the parameter of notification distance threshold based on the driver's visual state parameter. The determination unit detects whether the driver is visually checking the forward direction, and the notification unit accordingly changes between a first notification distance (when driver is attentive) and a second notification distance (when driver is inattentive). This parameter change approach allows the system to optimize notification timing according to driver state, resolving the contradiction between comprehensive coverage and timely notification.
2Loss of time
If the predetermined distance is set to be short, then the notification timing is precise, but the notification is performed even when the driver is paying attention and perceives the movement
Solution Approach 1:
The notification distance threshold is dynamically adjusted based on the driver's visual state. When the driver is determined to be visually checking the forward direction, a first (longer) distance threshold is used, which reduces false alarms. When the driver is not visually checking the forward direction, a second (shorter) distance threshold is used, which ensures timely notification. This dynamic adjustment resolves the contradiction by adapting the notification criteria to the driver's actual attention state.
Solution Approach 2:
The system changes the parameter of notification distance threshold based on the driver's visual state parameter. By switching between a first notification distance (when driver is attentive) and a second notification distance (when driver is inattentive), the system avoids false alarms for attentive drivers while ensuring timely notifications for inattentive drivers, thus resolving the contradiction between timing precision and false alarm reduction.
3Ease of operation
If uniform notification is used regardless of driver state, then the system is simple to operate, but the notification effectiveness varies with driver attention
Solution Approach 1:
The system automatically detects the driver's visual state and self-adjusts the notification parameters without requiring manual intervention from the driver. The determination unit detects whether the driver is visually checking the forward direction, and the notification unit automatically adjusts the notification distance threshold accordingly. This self-service approach maintains ease of operation while significantly improving notification effectiveness by adapting to the driver's actual attention state.
Solution Approach 2:
The system automatically changes the notification distance threshold parameter based on the detected driver visual state. When the driver is visually checking the forward direction, a first notification distance is used; when the driver is not visually checking the forward direction, a second notification distance is used. This automatic parameter change improves notification effectiveness while maintaining system simplicity, as the driver does not need to manually adjust any settings.
Data Source
AI summary
A notification device that notifies a driver of a host vehicle of a start of movement of a preceding vehicle that is in a stopped state in front of the host vehicle, includes: a determination unit which determines whether the driver is visually checking a forward direction; a state detection unit which detects a state of the preceding vehicle; and a notification unit notifies the driver of the start of movement. The notification unit changes a notification mode of notifying the driver of the start of movement, between a case where the driver is visually checking the forward direction and a case where the driver is not visually checking the forward direction. The notification mode includes at least one of a timing of a notification, presence or absence of the notification, and a notification method.