Vehicle Headlight Control Architecture for Easier Software Maintenance
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Solution Overview
Problem
Modern vehicles with complex headlights require costly and complex maintenance due to software-related errors necessitating the removal of entire headlight assemblies.
Innovation Solution
A vehicle lighting system comprising a master control device and slave control devices connected via a bus system, allowing application software to be transferred between them, enabling maintenance without removing the entire headlight and facilitating easy updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control units are permanently installed within the headlight assembly, then the headlight system can be controlled reliably, but maintenance becomes complex and costly requiring removal of the entire headlight assembly
Solution Approach 1:
The control system is segmented into a master control unit located outside the headlight assembly and slave control units located inside. This segmentation allows the slave control units to be easily replaced or updated without removing the entire headlight assembly, while the master control unit maintains overall system reliability through centralized control and software management.
2Adaptability or versatility
If the entire headlight assembly is removed for software updates, then software can be updated, but time and cost are significantly increased
Solution Approach 1:
The slave control units are extracted as separate, accessible components within the headlight assembly. This extraction allows software updates to be performed by simply replacing or communicating with the slave control unit via bus system, without the need to remove the entire headlight assembly, thereby significantly reducing maintenance time while preserving software update capability.
3Manufacturing precision
If control units are integrated within the headlight housing, then control precision is improved, but device complexity increases
Solution Approach 1:
The control system is divided into master and slave control units with clearly defined functions. The slave control units handle local control precision tasks within the headlight, while the master control unit manages overall system coordination. This segmentation maintains control precision while reducing overall system complexity through modular design and standardized bus communication.
Data Source
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AI summary
A lighting device has a master control apparatus (1) and at least one slave control apparatus (21a, 21b, 21c), wherein the slave control device (21a, 21b, 21c) is connected to the master control apparatus (1) via a bus system (15). The slave control apparatus (21a, 21b, 21c) is designed to execute application software for actuating a headlight system component (23a, 23b, 23c). The master control apparatus (1) is designed to upload the application software onto the slave control apparatus (21a, 21b, 21c) and/or to actuate and/or diagnose the slave control apparatus (21a, 21b, 21c).