Portable Memory Data Transfer for Vehicle Event Recorders
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Solution Overview
Problem
Existing vehicle event recorder systems face challenges in efficient data transfer, particularly for individual or family use scenarios where Wi-Fi connectivity is not available, and they lack a mechanism for archiving data in a permanent and secure fashion.
Innovation Solution
A distributed vehicle event recorder system utilizing a portable flash-type semiconductor memory with a USB interface for data transfer between a vehicle event recorder and a remote server, where a transfer status file ensures that only successfully transferred data is deleted from the vehicle's resident memory, allowing for easy and secure data archiving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated Wi-Fi data transfer systems are used, then data transfer efficiency is improved, but system complexity and requirement for network infrastructure increases
Solution Approach 1:
A portable memory device serves as an intermediary between the vehicle event recorder and the remote server, enabling data transfer without requiring direct network connectivity. The memory device is inserted into a port on the event recorder, automatically receives data via interrupt-driven I/O, and can then be transferred to any location for server connection, eliminating the need for complex Wi-Fi infrastructure while maintaining efficient data transfer.
2Duration of action of stationary object
If data is stored in vehicle event recorder memory, then short-term data preservation is achieved, but long-term archiving capability is insufficient
Solution Approach 1:
The system extracts data from the vehicle event recorder's internal memory and transfers it to external storage media (portable memory devices). This separates the short-term capture function from long-term archiving, allowing the event recorder to maintain its compact design while enabling secure, indefinite data retention through external storage that can be kept in safe locations.
Solution Approach 2:
The system performs preliminary data transfer to portable memory devices before potential data loss scenarios occur. By automatically capturing and externally storing data in real-time, the system ensures data is preserved before accidents, theft, or system failures could compromise it, enhancing both the duration and reliability of data archiving.
3Device complexity
If manual data download methods are used, then system simplicity is maintained, but data transfer productivity decreases
Solution Approach 1:
The portable memory device operates autonomously in the data transfer process. When inserted into the event recorder, it automatically receives data through interrupt-driven I/O without requiring manual initiation or configuration by the user. The device independently manages data reception, storage, and can initiate transmission to the server, eliminating tedious manual operations while maintaining system simplicity.
4Productivity
If vehicle returns to designated parking facility for data transfer, then automated data transfer is achieved, but vehicle mobility and operational flexibility is restricted
Solution Approach 1:
The data transfer function is segmented from the vehicle's operational location requirements. By using removable portable memory devices, the data capture function (in the vehicle) is separated from the data transfer and archiving function (external). This allows the vehicle to operate freely anywhere while data is continuously captured and can be transferred at any convenient location with server access, completely decoupling vehicle mobility from data transfer constraints.
Data Source
AI summary
Data transfer systems for vehicle event recorders are provided as: a vehicle event recorder, a vehicle event recorder resident memory, and upload module in conjunction with, a communication port suitable for coupling with, a portable memory device, a server computer datastore, a server download module in conjunction with, a similar cooperating communications port. The portable memory device is arranged to operably couple with the communications ports of both the vehicle event recorder and the server computer and to be repeatedly moved between the two. The upload/download modules are arranged to transfer data to/from the portable memory in an orderly fashion in which no files are removed from the vehicle event recorder resident memory without first having been successfully transferred to the server computer datastore.