Vehicle Malfunction Data Storage with Conditional Ring Buffer
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Solution Overview
Problem
Existing vehicle data management systems face issues with storage capacity overflow when accumulating malfunction analysis data sets, leading to a lack of space for new data as detections increase, preventing further storage.
Innovation Solution
Implementing a data management device that stores malfunction analysis data sets in a first storage area until a prescribed amount is reached, then transfers important data to a second storage area using a ring buffer method, ensuring continuous storage capacity by overwriting older data when full.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If malfunction analysis data sets are continuously accumulated in the storage device, then the quantity of stored data increases, but the storage capacity becomes full and new data cannot be stored
Solution Approach 1:
The storage device is divided into two distinct storage areas: a first storage area that stores all malfunction analysis data sets, and a second storage area that selectively stores only those data sets meeting specific conditions. This segmentation allows the system to manage storage capacity more effectively by categorizing data based on importance or analysis value.
Solution Approach 2:
The system changes the storage parameter from uniform storage to conditional storage by evaluating whether data sets meet predetermined specific conditions before storing them in the second storage area. This parameter change enables selective retention of high-value data while managing overall storage consumption.
2Loss of information
If all malfunction analysis data sets are stored in the first storage area, then data completeness is maintained, but storage space is consumed rapidly and cannot be reused
Solution Approach 1:
Data sets meeting specific conditions are copied from the first storage area to the second storage area. This copying mechanism allows important data to be preserved in the second area while the first area becomes available for new data, effectively creating a data retention and reuse strategy.
Solution Approach 2:
The system implements a discarding and recovering mechanism where data sets that have been processed and meet specific conditions are moved to the second storage area, effectively 'discarding' them from the first storage area to make space for new data while preserving the valuable information in the second area.
3Volume of stationary object
If the storage device uses a ring buffer method for the second storage area, then storage capacity is continuously maintained through overwriting, but data selection criteria must be established
Solution Approach 1:
The system performs preliminary evaluation of data sets against predetermined specific conditions before determining whether to store them in the second storage area. This preliminary action simplifies the overall management complexity by establishing clear selection criteria in advance, making the ring buffer operation more straightforward and predictable.
Data Source
AI summary
A data management device for a vehicle, a vehicle, an analysis system, a storage medium, and a data management method for a vehicle are provided. Processing circuitry acquires a malfunction analysis data sets for analyzing a malfunction in the vehicle when the malfunction has been detected. Newly acquired ones of the malfunction analysis data sets are stored in a first storage area until the total amount of the stored malfunction analysis data sets reaches a prescribed amount. When the newly acquired ones of the malfunction analysis data sets meet a predetermined specific condition, the newly acquired ones of the malfunction analysis data sets are stored in a second storage area using a ring buffer method.