ECU Sleep Transition Monitoring for Early Battery Drain Detection
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Solution Overview
Problem
Existing technologies for detecting behaviors of electronic control units (ECUs) in vehicles are inadequate, particularly in identifying abnormalities that lead to increased power consumption and potential battery drain.
Innovation Solution
An information processing device mounted on a vehicle increments a delay count when the sleep transition time of an ECU exceeds a prescribed time and outputs information on the ECU when the count reaches a prescribed threshold, allowing early detection of abnormal behaviors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sleep transition time of ECU is monitored to detect abnormal behaviors, then power consumption abnormalities can be detected early, but the system complexity increases due to additional monitoring and counting mechanisms
Solution Approach 1:
The monitoring function is segmented into specific components: a sleep transition time measurement unit that measures the time from when ECU enters non-sleep state to when it returns to sleep state, and a delay count management unit that increments a counter when the measured time exceeds a threshold. This segmentation allows targeted monitoring without requiring complete system redesign.
Solution Approach 2:
The system performs preliminary actions by setting a delay count threshold in advance and continuously comparing the actual delay count against this threshold. When the threshold is reached or exceeded, the system proactively outputs abnormal behavior information, enabling early detection before battery drain occurs.
2Reliability
If continuous monitoring of ECU sleep states is implemented, then abnormal power consumption can be detected, but energy consumption increases due to constant monitoring operations
Solution Approach 1:
Instead of continuous monitoring, the system implements periodic monitoring by measuring sleep transition time only when ECU transitions between sleep and non-sleep states. The monitoring is triggered by state changes rather than operating continuously, significantly reducing energy consumption while maintaining detection capability.
Solution Approach 2:
The monitoring system leverages existing ECU state transition events to trigger measurements. The ECU's own operational states (sleep/non-sleep transitions) serve as the trigger signals for monitoring, eliminating the need for separate continuous monitoring operations and reducing overall energy consumption.
Data Source
AI summary
An information processing device increment a first delay count when a sleep transition time exceeds a first prescribed time, the sleep transition time being a time from when an ECU mounted on the vehicle goes into a non-sleep state until the electronic control unit returns to a sleep state. The information processing device outputs information on the ECU when the first delay count becomes equal to or greater than a first prescribed count.