Power Supply Control System for ECU Dark Current Anomaly Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power supply control systems face challenges in accurately detecting dark current anomalies in electronic control units (ECUs) without communication functions, leading to increased complexity and cost in circuit structure, and inability to perform power supply control for ECUs without communication capabilities.
Innovation Solution
A power supply control system with a monitoring controller, first and second current controllers, and anomaly determinators that use current sensors and dark current sensors to detect and manage current thresholds, allowing for detection of anomalies and initialization of ECUs in a power-saving state, even without communication functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional power supply control system uses communication-based threshold reporting from multiple ECUs, then the threshold value accuracy is improved, but the device complexity increases due to communication requirements for all ECUs
Solution Approach 1:
The patent extracts the threshold determination function from the communication-based system and implements it locally at each ECU. Each ECU independently determines its own threshold value based on its operational state, eliminating the need for communication connections while maintaining accurate threshold values specific to each controller's conditions.
Solution Approach 2:
Each ECU serves itself by autonomously determining its own threshold value based on its operational state without requiring external communication. The system enables self-service threshold management where each controller independently grasps and applies its appropriate threshold value, removing the communication infrastructure requirement.
2Device complexity
If a shared detection circuit is used during both sleep and wake times, then the device complexity is reduced, but the measurement precision of dark current detection deteriorates due to wider accuracy range requirements
Solution Approach 1:
The patent implements a dynamic circuit configuration where the detection circuit switches between two operational modes: a high-precision dark current detection mode during sleep time and a general current detection mode during wake time. This dynamic adaptation allows the circuit to maintain high measurement precision for dark current while still providing comprehensive current monitoring functionality.
Solution Approach 2:
The patent applies different detection characteristics to different time periods: during sleep time, the circuit is optimized for high-precision dark current measurement with appropriate sensitivity, while during wake time, it operates in a general current monitoring mode. This local optimization of detection quality for specific operational conditions maintains accuracy without requiring a permanently complex circuit.
3Reliability
If the power supply control system monitors total current from multiple ECUs, then the system can detect anomalies, but the reliability decreases when ECUs without communication functions are present
Solution Approach 1:
The patent segments the current monitoring function into individual ECU-level monitoring. Each ECU independently monitors its own current consumption and determines its own threshold value, allowing anomaly detection for each controller separately. This segmentation enables the system to accommodate ECUs with or without communication functions, as each unit operates independently with its own monitoring capability.
Data Source
AI summary
A power supply control system includes: a current sensor as a first detector detecting current flowing in each controller in an operating state of each controller; a first current controller turned on to supply a driving current to each controller in the operating state of each controller and turned off to disconnect the driving current supply to each controller based on a determination result; a second current controller turned on to supply a dark current to each controller in a power-saving state of each controller and turned off to disconnect the dark current supply to each controller in the operation state of each controller; a dark current sensor as a second detector detecting a voltage drop amount in the power-saving state of each controller; and an anomaly determinator determining existence of anomaly in the power-saving state of each controller based on a detection result obtained from the second detector.