Electronic Control Device Reset Determination via Sensor Signals
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Solution Overview
Problem
Existing techniques cannot immediately distinguish between microcomputer abnormalities and communication line abnormalities in automotive control systems, leading to delayed determination of communication issues between electronic control devices.
Innovation Solution
An electronic control device with a control command generation unit, communication unit, communication abnormality determination unit, and reset determination unit that uses sensor signals to differentiate between device resets and communication abnormalities, allowing for immediate cause identification and prioritization of control actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the existing technique waits for the microcomputer to rise from reset state before determining abnormality cause, then the determination can be made with sufficient information, but the determination time is delayed
Solution Approach 1:
The invention monitors sensor signals related to the control object state as a preliminary action before the microcomputer recovers from reset. By continuously monitoring these signals and comparing them against predetermined thresholds, the system can immediately determine whether a reset occurred without waiting for the microcomputer to recover, thus reducing determination time while maintaining accuracy
Solution Approach 2:
The invention introduces sensor signals as an intermediary indicator to infer the reset state of the microcomputer. Instead of directly monitoring the microcomputer's internal state, the system uses external sensor signals that reflect the control object's state as a mediator to determine whether a reset has occurred, enabling indirect but timely detection
Data Source
AI summary
An electronic control device includes a control command generation unit that generates and outputs a control command for controlling a first control object; a communication unit that performs communication with another electronic control device that controls a second control object; a communication abnormality determination unit that determines whether communication with the another electronic control device by the communication unit is abnormal; and a reset determination unit that determines whether the another electronic control device is reset based on a change in a sensor signal related to a state of the second control object when the communication abnormality determination unit determines that the communication with the another electronic control device is abnormal.