ECU Wake-Up Control Using Abnormal Activation Signal Detection
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Solution Overview
Problem
Existing information processing systems may unnecessarily switch ECUs to wake-up mode due to abnormal activation request signals from external devices, leading to increased power consumption.
Innovation Solution
A first ECU determines if an activation request signal from an external device has persisted for a prescribed period, identifies the device as abnormal, and switches the second ECU to sleep mode if the signal persists, while allowing normal devices to maintain wake-up mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the first ECU switches the second ECU to wake-up mode upon receiving an activation request signal, then the system responds quickly to activation requests, but the second ECU may be unnecessarily switched to wake-up mode due to abnormal signals, increasing power consumption
Solution Approach 1:
The first ECU performs preliminary verification by monitoring whether the activation request signal continues for a prescribed period before executing the wake-up mode switch. This preliminary action filters out abnormal transient signals while maintaining responsiveness to legitimate activation requests.
2Reliability
If the first ECU monitors signal duration to filter abnormal requests, then false wake-up triggers are reduced, but the system complexity increases
Solution Approach 1:
The system changes the temporal parameter of signal validation by introducing a time-duration criterion. The first ECU compares the signal duration against a prescribed threshold, transforming a simple presence/absence detection into a time-based validation mechanism that improves reliability without requiring complex analysis.
Data Source
AI summary
An information processing system includes a first ECU and a second ECU. The first ECU is configured to: communicate with the second ECU; acquire an activation request signal from an external device; determine whether the acquired activation request signal has continued for a prescribed period or more; when the first ECU determines that the activation request signal has continued for the prescribed period or more, identify the external device that has output the activation request signal as an abnormal external device; switch the second ECU to a wake-up mode when the first ECU acquires the activation request signal from the external device that is not the abnormal external device while the second ECU is in a sleep mode; and switch the second ECU to the sleep mode when the first ECU acquires the activation request signal from the abnormal external device.