Vehicle Control Device Abnormality Detection Buffer Storage
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Solution Overview
Problem
Current vehicle diagnostic devices fail to record and analyze behaviors that are different from normal but not classified as failures, leading to overlooked abnormalities and potential distrust among drivers.
Innovation Solution
A control device with a monitor unit, nonvolatile storage, and abnormality detection part that stores vehicle and control state information before and after an abnormality is detected, allowing for precise recognition and analysis of abnormal behaviors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data is stored only for a predetermined period after failure occurrence, then storage device capacity is restricted and data amount is controlled, but abnormalities that occur sporadically and are overlooked cannot be traced or recorded
Solution Approach 1:
The system performs preliminary action by continuously monitoring vehicle states and pre-processing data before failure occurs. The monitor unit continuously acquires vehicle state information and control state information, and the abnormality detection part continuously compares this data against predefined ranges to detect abnormalities before they escalate to failures, ensuring no overlooked abnormalities are missed.
Solution Approach 2:
The patent introduces an intermediary mechanism - the abnormality detection part and monitor unit - that acts as a mediator between raw vehicle data and failure detection. This intermediary continuously monitors vehicle state information and control state information, detects abnormalities by comparing data against predefined ranges, and triggers selective data storage, thereby bridging the gap between continuous monitoring and limited storage capacity.
2Loss of information
If data is stored for all vehicle behaviors, then complete traceability is achieved, but storage device capacity is excessively large and data management becomes complex
Solution Approach 1:
The system extracts only the necessary and relevant data for analysis by implementing selective storage. The data storage control part stores vehicle state information, control state information, and monitor information only when abnormalities are detected or failures occur, extracting critical information from the continuous stream of vehicle data while discarding redundant normal operation data, thus managing storage complexity effectively.
Solution Approach 2:
The patent applies local quality by differentiating data storage requirements based on the operational state. Different data are stored with different retention policies: normal operation data are not stored or stored temporarily, while abnormality and failure data are stored with higher priority and longer retention, ensuring information completeness for critical events while minimizing overall storage requirements and management complexity.
3Loss of energy
If abnormalities are not recorded, then storage resources are conserved, but driver discontent and distrust are aggravated due to unexplained vehicle behaviors
Solution Approach 1:
The system implements feedback by continuously monitoring vehicle states and providing information back to the driver about detected abnormalities. The monitor unit and abnormality detection part create a feedback loop that identifies unusual vehicle behaviors, stores relevant data for analysis, and enables subsequent communication with the driver about vehicle status, thereby maintaining trust through transparency while managing storage resources efficiently.
Data Source
AI summary
Vehicle state information is input, and a control amount, which is control state information, is calculated from the vehicle state information to control a controlled device. A control state is monitored by a monitor unit, and an abnormality is detected based on a state where the vehicle state information or the control state information exists in an abnormality region in which the vehicle state information or the control state information has not reached a failure region corresponding to a failure. The vehicle state information, the control state information, and monitor information are stored in a buffer for a period set in advance while always updating the latest vehicle state information, control state information, and monitor information. When the abnormality is detected, the above respective information before and after the abnormality detection including the information stored in the buffer are stored in a nonvolatile storage unit.