Automated Driving Route Control With Pre-Retrieved Partial Routes
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Solution Overview
Problem
In automated driving systems, the retrieval of a redundant route can cause temporary suspension of cooperation between the electronic control unit and the navigation unit, leading to disruptions in vehicle control, as the electronic control unit cannot receive information about the redundant route until the retrieval is complete.
Innovation Solution
The automated driving device includes a navigation unit that retrieves partial routes with a predetermined length before reaching a branch point, allowing the electronic control unit to control the vehicle based on information from these partial routes until the redundant route is retrieved, thereby minimizing the suspension of cooperation between the units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the navigation unit retrieves a redundant route after the vehicle departs from the guide route, then the electronic control unit can receive alternative route information, but the cooperation between the electronic control unit and navigation unit is temporarily suspended during retrieval
Solution Approach 1:
The navigation unit performs preliminary retrieval of partial routes before the vehicle actually departs from the guide route. By retrieving candidate partial routes in advance (while the vehicle is still on the guide route or approaching the branch point), the system ensures that route information is available immediately when needed, eliminating the cooperation suspension that would occur if retrieval started after departure.
Solution Approach 2:
The redundant route retrieval process is segmented into multiple partial routes rather than retrieving the entire redundant route at once. The navigation unit retrieves only the necessary partial routes (with predetermined length) that the vehicle might need to follow, reducing the total retrieval time and allowing the electronic control unit to receive route information more quickly without waiting for complete redundant route calculation.
2Productivity
If the navigation unit waits to retrieve partial routes until the vehicle passes the branch point, then retrieval can be triggered by actual departure, but the electronic control unit cannot control automated driving based on partial route information during the retrieval period
Solution Approach 1:
The system performs preliminary retrieval of partial routes before the vehicle reaches or passes the branch point. This ensures that when the vehicle actually departs from the guide route, the electronic control unit already has the necessary partial route information to maintain continuous automated driving control without interruption or suspension.
Solution Approach 2:
By retrieving partial routes in advance and maintaining continuous cooperation between the navigation unit and electronic control unit, the system ensures uninterrupted automated driving control. The electronic control unit can continuously control the vehicle based on available partial route information without experiencing gaps or suspensions in control functionality.
Data Source
AI summary
An automated driving device includes: a navigation unit configured to retrieve one or more partial routes with a predetermined length other than a guide route which branch from the guide route at a branch point through which a vehicle is expected to pass before the vehicle passes through the branch point; and an electronic control unit configured to control automated driving of the vehicle based on information of a specific partial route out of the one or more partial routes in a period until the navigation unit completes retrieval of a redundant route for guiding the vehicle to a destination point when the vehicle departs from the guide route at the branch point and travels on the specific partial route.