Vehicle Map Control for Automatic Driving With Limited Road Data
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Solution Overview
Problem
Existing automatic driving systems face challenges in maintaining accurate control when road information is insufficient, as they rely heavily on sensor data and may not effectively handle incomplete or outdated map information.
Innovation Solution
An electronic control device and automatic driving system that utilize multiple pieces of map information, each corresponding to a predetermined geographical area, to determine vehicle control methods by specifying relevant data and communicating with a server for real-time updates and data acquisition, ensuring continuous and stable automatic driving even in areas with limited information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If map information is stored for all geographical areas, then automatic driving control can be performed anywhere, but storage capacity requirements increase significantly
Solution Approach 1:
The patent divides map information into multiple segments: basic map information stored locally in the vehicle, and detailed map information stored on servers. The specification unit selectively specifies which segments to acquire based on travel routes and communication availability, resolving the contradiction between comprehensive coverage and storage constraints
Solution Approach 2:
The system performs preliminary acquisition of basic map information that is sufficient for basic automatic driving control. Detailed map information is acquired in advance when communication quality is good, before it is critically needed, reducing the need for large onboard storage while maintaining control availability
2Measurement precision
If detailed map information is acquired continuously, then control accuracy is improved, but communication time and energy consumption increase
Solution Approach 1:
The system acquires only the necessary amount of map information based on current needs and communication conditions. The acquisition amount is dynamically adjusted - acquiring detailed information when communication is available and basic information when communication is limited, achieving sufficient accuracy without excessive communication overhead
Solution Approach 2:
The map information acquisition strategy is made dynamic, adapting to changing communication quality and vehicle travel states. The system flexibly switches between acquiring detailed information and relying on stored basic information, optimizing the balance between accuracy and communication time
3Loss of information
If map information is updated frequently, then information currency is improved, but data transmission requirements increase
Solution Approach 1:
The system extracts and transmits only the essential updates to map information rather than transmitting complete datasets. Changes and updates are identified and transmitted selectively, maintaining information currency while minimizing data transmission volume
Data Source
AI summary
An electronic control device is mounted on a vehicle and executes automatic driving control using a plurality of pieces of map information. Each piece of the map information includes one or more pieces of partial data corresponding to a predetermined geographical area and being information of a predetermined attribute related to a road of the predetermined geographical area. The electronic control device includes a storage unit that stores one or more pieces of the map information, a specification unit that specifies the map information corresponding to a traveling position of the vehicle, and a control unit that determines a control method of the vehicle at a traveling position of the vehicle according to the partial data included in the map information specified by the specification unit.