Driver Assistance Device Target Type Detection
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Solution Overview
Problem
Driver assistance systems often issue unnecessary notifications when the deceleration target is lost, leading to driver annoyance, as they continue deceleration assistance assuming the target exists even if it is no longer present, especially when the target is a position-fixed object like a traffic light.
Innovation Solution
A driver assistance device that determines the type of deceleration target and only notifies the driver if it is a moving object, continuing deceleration assistance using the position of a lost position-fixed object target, and adjusts notifications based on traffic light state changes to inform the driver of necessary deceleration actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deceleration assistance continues when the deceleration target is lost, then the system maintains safety by assuming the target exists, but the driver receives unnecessary notifications when the target is a position-fixed object, causing annoyance
Solution Approach 1:
The notification behavior is differentiated based on the type of deceleration target. For position-fixed objects, notifications are suppressed when the target is lost, while for moving objects, notifications continue. This localized differentiation of notification behavior resolves the contradiction by applying different quality rules to different target types.
Solution Approach 2:
The system dynamically adjusts notification behavior based on the detected type of deceleration target. The notification unit changes its operation mode depending on whether the target is classified as position-fixed or moving, allowing the system to adapt its notification strategy to the specific situation.
2Loss of information
If the system notifies the driver whenever the deceleration target is lost, then the driver is informed of all target loss events, but the driver receives redundant notifications for position-fixed objects where continued deceleration assistance is appropriate
Solution Approach 1:
The notification system applies different information delivery rules based on target type. Position-fixed objects receive suppressed notifications when lost, while moving objects receive full notifications. This selective information delivery eliminates redundant notifications while preserving important information.
Solution Approach 2:
Instead of completely suppressing all notifications when a target is lost, the system applies partial notification suppression only for position-fixed objects. This partial action approach maintains necessary notifications for moving objects while filtering out redundant notifications for position-fixed targets.
3Ease of operation
If the system suppresses all notifications when the deceleration target is lost, then driver annoyance is reduced, but the driver is not informed when the target is a moving object requiring attention
Solution Approach 1:
The notification suppression is applied locally and selectively only to position-fixed objects, while moving objects continue to trigger notifications. This localized application of suppression rules maintains driver comfort for routine situations while preserving critical information for situations requiring driver attention.
Solution Approach 2:
The notification system dynamically switches between suppressed and active notification modes based on the detected target type. This dynamic adjustment ensures that notifications are delivered only when necessary, balancing driver comfort with information delivery.
Data Source
AI summary
A driver assistance device is configured to determine whether a type of a deceleration target is included in a category of a position-fixed object or a moving object, and determine whether the deceleration target is lost, and to continue the deceleration assistance on assumption that the lost deceleration target exists when the deceleration target is determined to be lost. The driver assistance device is configured to notify a driver of a host vehicle that the deceleration target is lost when the deceleration target is determined to be lost and the type of the deceleration target is included in the category of the moving object, and not to notify the driver that the deceleration target is lost when the deceleration target is determined to be lost and the type of the deceleration target is included in the category of the position-fixed object.