Electronic Control Device Dynamic Diagnosis Adaptation
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Solution Overview
Problem
Existing electronic control devices for automatic driving and advanced driving support systems do not account for variations among products, leading to inefficiencies in communication quality diagnosis between sensors and ECUs due to signal quality deterioration in transmission lines.
Innovation Solution
An electronic control device with a receiving unit, a determination criterion selection unit, and a condition determination unit that assesses the communication system's condition based on the transition information of the data signal's waveform, allowing for accurate diagnosis of communication system characteristics and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed diagnostic criterion is used for communication quality diagnosis, then the diagnosis process is simple, but it cannot adapt to variations among different products and transmission lines
Solution Approach 1:
The patent implements dynamic diagnostic criteria by automatically adjusting the determination threshold based on measured transmission line characteristics. Instead of using a fixed criterion, the system adapts the diagnostic threshold dynamically according to the actual signal attenuation and waveform characteristics observed in each specific product and transmission line configuration, enabling adaptation to product variations while maintaining diagnostic accuracy.
Solution Approach 2:
The patent changes the diagnostic parameter from a fixed threshold to a variable threshold that is adjusted based on measured transmission characteristics. The determination criterion is modified as a parameter that varies according to the signal quality metrics (such as eye pattern opening, signal attenuation) measured during communication, allowing the system to adapt to different products and transmission lines by changing this key parameter.
2Measurement precision
If communication quality diagnosis is performed without considering transmission line characteristics, then the diagnosis is fast, but the accuracy deteriorates due to signal quality deterioration
Solution Approach 1:
The patent performs preliminary measurement of transmission line characteristics (such as signal attenuation, eye pattern characteristics) before conducting the actual communication quality diagnosis. By obtaining these baseline characteristics in advance, the system can then use them to set appropriate diagnostic thresholds and criteria, improving diagnosis accuracy without requiring time-consuming iterative measurements during the actual diagnostic process.
Data Source
AI summary
An electronic control device includes a receiving unit that receives a data signal from an external device via a transmission line, a determination criterion selection unit that determines a determination criterion based on transition information of a waveform in the data signal, and a condition determination unit that determines a condition of a communication system including the external device, the receiving unit, and the transmission line based on a transmission waveform characteristic in the data signal and the determination criterion.