Remote Vehicle Guidance via Standardized OBD-CAN Interface
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Solution Overview
Problem
Current vehicle guidance systems for driverless vehicles without steering wheels or pedals lack standardized communication interfaces, requiring significant additional development effort for remote control functionality during maintenance and service operations.
Innovation Solution
A vehicle guidance system featuring a remote control unit with a user interface for entering guidance specifications, a command translation unit to determine and transmit relevant vehicle parameters, and a standardized wired communication interface, such as OBD-2, for connecting to the vehicle's internal communication system, enabling efficient communication and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a remote control unit is implemented for driverless vehicles without standardized interfaces, then vehicle guidance functionality is achieved, but development effort and system complexity increase significantly
Solution Approach 1:
The patent applies universality by implementing a standardized communication interface based on ISO 15765-4 (CAN over USB) that can be used across different vehicle models and manufacturers. This single interface design serves multiple purposes: it enables remote control functionality, provides diagnostic capabilities, and supports various vehicle guidance scenarios without requiring separate interface developments for each case.
Solution Approach 2:
The patent introduces an intermediary layer in the form of a translation unit that converts between USB communication protocols and CAN bus protocols. This intermediary component mediates between the remote control unit and the vehicle's internal communication systems, enabling standardized interaction without requiring direct customization between each remote control and vehicle combination.
2Reliability
If multiple proprietary interfaces are developed for different vehicle models, then specific vehicle requirements are met, but manufacturing cost and system adaptability decrease
Solution Approach 1:
The standardized USB-to-CAN interface design enables a single remote control unit to work with multiple vehicle models from different manufacturers. The system maintains adaptability through configuration files that map generic CAN messages to vehicle-specific parameters, allowing one interface design to serve multiple vehicle types without sacrificing model-specific control requirements.
Solution Approach 2:
The patent uses parameter changes to adapt the standardized interface to different vehicle models. By modifying communication parameters such as CAN message IDs, data formats, and control thresholds in configuration files rather than changing the fundamental interface architecture, the system maintains both standardization and vehicle-specific customization capabilities.
3Ease of operation
If wireless communication is used between remote control unit and vehicle, then ease of use improves, but communication reliability and response time may deteriorate
Solution Approach 1:
The patent uses USB wireless communication as an intermediary that provides reliable structured data transmission between the remote control unit and the vehicle. The USB protocol ensures stable communication with defined error handling and retransmission mechanisms, while the translation to CAN bus messages maintains the reliability needed for vehicle control applications.
Data Source
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AI summary
The invention relates to a vehicle guidance system (1) for a driverless vehicle (4), in particular one without a steering wheel and pedals. The vehicle guidance system (1) comprises a remote control unit (2) with a user interface (6) for inputting vehicle guidance commands. It further comprises a command translation unit (3) configured to receive the inputted vehicle guidance commands, determine target values of at least one vehicle guidance-relevant parameter based on these commands, and generate corresponding messages known to the integrated control units of the vehicle (4) for controlling corresponding vehicle actuators.The command translation unit (3) for transmitting the generated messages to the integrated control units of the vehicle (4) has a wired communication interface (K22) which is designed for connection to a standardized wired interface (K21) of a vehicle-specific communication system (5) in which these control units are connected.