MDVR Shutdown Inhibition During Active Data Downloads
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Solution Overview
Problem
Mobile digital video recording systems (MDVR) face interruptions and data loss during downloads due to shutdowns when vehicle ignition is turned off, especially if the Wi-Fi connection is not available, leading to incomplete data transfers and inefficiencies in data analysis.
Innovation Solution
The MDVR system is designed to inhibit shutdown during active downloads by checking for network connectivity and data completeness, ensuring that downloads can continue even when the vehicle ignition is off, using predetermined conditions such as connection attempts and data rates to determine when it is safe to shut down.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the MDVR system shuts down after a programmed time delay when vehicle ignition is OFF, then energy consumption is reduced, but data download may be interrupted and lost
Solution Approach 1:
The shutdown delay time is made dynamic rather than fixed. The system adjusts the shutdown delay based on whether a download is currently active. When a download is detected, the shutdown is inhibited entirely, allowing the download to complete. This dynamic adjustment resolves the contradiction by adapting the energy-saving shutdown behavior to the current operational context, ensuring data completeness when necessary while maintaining energy efficiency when downloads are not active.
Solution Approach 2:
The system implements feedback by continuously monitoring the download status and using this information to control the shutdown behavior. The data controller detects whether a download is active and provides feedback to the shutdown control logic, which then adjusts the shutdown timing accordingly. This feedback mechanism ensures that the system only extends or inhibits shutdown when actually needed for data transfer, balancing energy consumption with download reliability.
2Reliability
If the MDVR system extends shutdown delay to ensure complete download, then data download completeness is improved, but energy consumption increases
Solution Approach 1:
The shutdown delay is dynamically adjusted based on download status. Rather than always extending the delay, the system only modifies the shutdown behavior when a download is actively in progress. This dynamic approach ensures data completeness is improved only when necessary, while avoiding unnecessary energy consumption during periods when downloads are not occurring.
Solution Approach 2:
The system changes the time parameter of the shutdown delay based on the download state. When a download is detected, the shutdown delay parameter is extended or the shutdown is inhibited. When no download is active, the original programmed delay is maintained. This parameter change strategy resolves the contradiction by optimizing the balance between download completeness and energy consumption based on real-time conditions.
3Reliability
If the MDVR system continuously monitors download status to prevent premature shutdown, then data download reliability is improved, but system complexity increases
Solution Approach 1:
The system uses a simple feedback mechanism where the data controller monitors the download status and communicates this information to the shutdown control logic. This feedback loop provides the necessary information to prevent premature shutdown without requiring complex monitoring systems. The feedback is triggered by specific events (download start/complete) rather than continuous monitoring, keeping the system relatively simple while improving reliability.
Solution Approach 2:
The system performs preliminary detection of download status before the programmed shutdown delay expires. By checking whether a download is active in advance of the scheduled shutdown, the system can adjust the shutdown timing appropriately. This preliminary action approach improves download reliability by catching the download status early, while avoiding the need for complex continuous monitoring throughout the entire delay period.
Data Source
AI summary
A method and system for inhibiting shutdown of a mobile data recorder of a mobile digital audio/video recording (MDVR) system in a vehicle while a download is active. The method including identifying if a data download is currently in process and the vehicle is in an OFF powered state and ascertaining if at least one of whether the data download is complete, and a data network connection for conducting the download is not available, and executing a shutdown of the MDVR system. Otherwise, inhibiting shut down of the MDVR system, determining if a selected condition for maintaining the inhibiting is false and executing a shutdown of the MDVR system, and repeating the ascertaining, inhibiting, and determining.