Vehicle Drive Assist Control for Diverging Diamond Interchanges
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Solution Overview
Problem
Existing vehicle drive assist apparatuses struggle to accurately detect oncoming vehicles and execute safe traveling control in diverging diamond interchanges (DDIs) due to the temporary reversal of lane positional relationships.
Innovation Solution
A vehicle drive assist apparatus equipped with a DDI detector that identifies the presence of a DDI and determines whether the vehicle is entering or exiting the DDI, allowing the control switch to adjust the traveling control from standard to non-standard modes accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard traveling control is used in DDI regions, then the control system remains simple and consistent, but oncoming vehicle detection accuracy deteriorates due to reversed lane positional relationships
Solution Approach 1:
The traveling control mode is dynamically switched between standard mode and non-standard mode based on DDI detection results. The system adapts its behavior to match the current road environment, using non-standard control only when entering DDI regions to maintain detection accuracy while minimizing overall system complexity
Solution Approach 2:
A DDI detector acts as an intermediary component that identifies DDI regions and triggers the switch between control modes. This mediator enables the system to recognize when special handling is needed without requiring the entire control system to be permanently complex
2Reliability
If the system switches to non-standard traveling control in DDI, then oncoming vehicle detection accuracy improves, but the risk of control errors increases due to unusual lane configurations
Solution Approach 1:
The system performs preliminary detection of DDI regions using map information before entering them. By anticipating the upcoming DDI configuration, the system can prepare the appropriate control mode in advance, ensuring a smooth transition and avoiding control errors that might occur with abrupt mode switching
Solution Approach 2:
The system continuously monitors its own control state and DDI detection status, using feedback to ensure proper mode switching. This self-regulation mechanism helps prevent control errors by verifying that the system is operating in the correct mode for the current road configuration
3Measurement precision
If the system continuously monitors for DDI regions, then traveling control accuracy in DDI improves, but computational load and processing time increase
Solution Approach 1:
The system uses pre-stored map information to identify DDI regions in advance, rather than relying solely on real-time image processing. This approach significantly reduces computational energy consumption during actual driving while maintaining high detection accuracy, as the heavy processing is done beforehand during map data preparation
Data Source
AI summary
A vehicle drive assist apparatus for a vehicle includes a surrounding-condition-information acquiring unit that acquires surrounding condition information, a vehicle-state-information acquiring unit that acquires vehicle state information, a traveling control processor that executes traveling control in accordance with traffic lane designation, a DDI detector, and a control switch. The DDI detector detects a DDI in a front region of the vehicle on the basis of the surrounding condition information and determines whether the vehicle is entering or exiting from the DDI on the basis of the surrounding condition information and the vehicle state information. The control switch switches the traveling control from standard traveling control to non-standard traveling control when the vehicle entering the DDI is detected, and from the non-standard traveling control to the standard traveling control when the vehicle exiting from the DDI is detected on the basis of the result of the DDI determination.