Vehicle Lamp Bus Segmentation for Communication Fault Isolation
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Solution Overview
Problem
Current vehicle lamp systems fail to synchronize the communication between lamps, especially where several lamps together form a multi-part lamp, and to handle failures of such communication, especially where several lamps together form a multi-part lamp, and to handle failures of such communication, especially where several lamps together form a multi-part lamp, and to handle failures of such communication.
Innovation Solution
A system for controlling vehicle lamps comprising a first lamp, a second lamp, a bus for parallel communication, a main control unit, and at least two secondary control units, where the main control unit controls the whole system via secondary control units, and each secondary control unit has an input connected to the bus and multiple outputs for switching light sources on and off, with a switch placed in the bus to disconnect sections in case of communication failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a parallel communication bus is used to connect main control unit and secondary control units, then communication efficiency is improved, but reliability deteriorates because a single point of failure can disable the entire communication system
Solution Approach 1:
The communication bus is divided into multiple independent sections with each secondary control unit having its own dedicated connection to the main control unit. This segmentation ensures that a failure in one section does not affect other sections, allowing the system to maintain partial functionality even when communication defects occur.
2Ease of manufacture
If lamps are mechanically separated into multiple parts, then ease of installation and vehicle design flexibility are improved, but communication reliability deteriorates due to increased wire damage risk from repeated pressing and bending
Solution Approach 1:
The system is divided into multiple independently mounted lamp parts, each with its own secondary control unit. This allows flexible installation on different vehicle components while maintaining communication through the segmented bus architecture that tolerates physical stress on individual connections.
Solution Approach 2:
The system incorporates redundancy and fault tolerance mechanisms in advance to cushion against potential wire damage from repeated pressing or bending. If a communication defect occurs, the system can detect it and switch to alternative communication paths or operational modes, preventing complete system failure.
3Reliability
If the entire communication bus fails, then all control units lose communication and are left in basic illumination state, but this causes loss of controlled illumination functions
Solution Approach 1:
The communication system is segmented into independent sections, so if one section fails, other sections can continue to operate. This allows partial illumination functions to remain available even when part of the system experiences communication failures.
Solution Approach 2:
The system continuously monitors communication status between control units. When a communication defect is detected, the system provides feedback to switch to alternative operational modes, ensuring that illumination functions can be maintained or restored rather than remaining in a permanent basic state.
Data Source
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AI summary
A system and method for controlling vehicle lamps. The system comprises two lamps and a main control unit (3) for controlling illumination of the lamps via secondary control units. The main control unit (3) and the secondary control units are connected through a bus (6) which has two sections connected by a switch (12). Each secondary control unit is configured for detecting a failure of communication in the bus (6) and setting each of its outputs (10) to a predefined value if the failure is detected. One of these outputs (10) is connected to a control terminal (13) of the switch (12) to automatically disconnect the bus (6) in case of failure of the communication to isolate the cause of the failure.