Vehicle Event Recorder Storage Segmentation for Data Distinguishability
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Solution Overview
Problem
Existing vehicle event data recorders face challenges in distinguishing between current and past information due to limited storage capacity, leading to potential errors in self-diagnosis and analysis, as they overwrite previous data, making it difficult to accurately determine the cause of vehicle problems or accidents.
Innovation Solution
An event information collecting system for vehicles that includes a status information acquiring device, a control device, a storage device, a main power supply, and an auxiliary power supply, which stores vehicle status information and power supply conditions at the time of an event, allowing for distinguishable data storage in a limited region, using a control routine to differentiate between pre-event and post-event data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If status information is continuously stored in a limited storage region while overwriting previous data, then the storage device can operate with limited capacity, but the boundary between current and past information becomes obscure leading to erroneous determination in self-diagnosis
Solution Approach 1:
The storage device is divided into multiple storage regions (first storage region and second storage region) that are alternately used. This segmentation allows clear distinction between current cycle information and past cycle information, preventing erroneous determination while maintaining limited storage capacity.
Solution Approach 2:
The system determines in advance whether to store information in the first or second storage region based on a storage determination condition. This preliminary action ensures that information is stored in the appropriate region before overwriting occurs, maintaining clear boundaries between current and past data.
2Quantity of substance
If new vehicle status data is recorded into a temporary storage unit while old data is erased, then the storage device maintains limited capacity, but it becomes impossible to analyze the information or make accurate self-diagnosis
Solution Approach 1:
By segmenting the storage device into multiple regions and alternately using them, the system preserves old information in one region while storing new information in another. This maintains both limited storage capacity and the reliability needed for accurate self-diagnosis and information analysis.
Solution Approach 2:
The system effectively creates a copy of the storage structure by having multiple storage regions that can be alternately activated. This allows preservation of historical data in one region while current data is stored in another, ensuring both capacity management and diagnostic reliability.
Data Source
AI summary
An event information collecting system installed on a vehicle includes a status information acquiring device that acquires and generates vehicle status information, a control device that receives the vehicle status information generated from the status information acquiring device, a storage device connected to the control device, a main power supply that supplies electric power to the control device, and an auxiliary power supply that supplies electric power to the control device when supply of power from the main power supply is stopped. In the event information collecting system, the control device stores, in the storage device, the vehicle status information generated from the status information acquiring device and a condition of power supply from the main power supply, at the time of occurrence of a given event.