Vehicle LVDS Error Diagnosis via Sequenced Controller Messaging
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Solution Overview
Problem
Conventional fault diagnosis methods for low-voltage differential signaling (LVDS) communication in vehicles are limited, as they cannot securely diagnose image quality issues due to restricted I2C communication between controllers, hindering effective error analysis and diagnosis.
Innovation Solution
A communication error diagnosis apparatus and system that transmit request messages with diagnostic identifiers and sequence identifiers to vehicle controllers, analyzing response messages to diagnose LVDS communication errors, including line faults, bit errors, and image quality issues, using a processor and storage to facilitate rapid error cause analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If I2C communication between controllers is used for diagnosis, then device complexity is reduced, but measurement precision of LVDS image quality is insufficient
Solution Approach 1:
The patent introduces an intermediary diagnostic device that mediates between the external diagnostic system and the vehicle controllers. This intermediary device receives LVDS image data from controllers via the existing I2C communication channel, processes the data externally, and performs comprehensive LVDS communication and image quality diagnosis without requiring complex in-vehicle communication protocol changes.
2Reliability
If comprehensive LVDS communication diagnosis is implemented, then reliability of error analysis is improved, but diagnosis time increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring the diagnostic device with multiple diagnostic functions and algorithms before actual diagnosis. The system prepares diagnostic templates, error analysis frameworks, and communication protocols in advance, allowing rapid execution of comprehensive LVDS diagnosis without time-consuming setup during the actual diagnostic process.
Solution Approach 2:
The patent implements continuous useful action by enabling simultaneous multi-controller diagnosis through the external diagnostic device. Multiple controllers can be diagnosed in parallel for LVDS communication errors, line faults, and image quality issues, maintaining continuous diagnostic flow without sequential delays between controllers.
3Loss of information
If multiple diagnostic identifiers are transmitted to multiple controllers, then completeness of error diagnosis is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a universal diagnostic message structure that can be used across multiple controllers and diagnostic functions. The request message format, response processing logic, and error analysis framework are standardized and reusable for different controllers and diagnostic scenarios, reducing message management complexity while maintaining information completeness.
Data Source
AI summary
A communication error diagnosis apparatus for a vehicle, a system including the same and a method thereof may provide a communication error diagnosis apparatus including: a processor configured to transmit a request message including diagnostic identifiers for diagnosing a plurality of controllers that perform vehicle functions and sequence identifiers of the controllers to the controllers depending on a sequence to receive response messages, and configured to analyze vehicle communication errors based on the response messages received from the controllers; and a storage configured to store data and algorithms driven by the processor.