Drive Recorder Server-Feedback Overwriting Policy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional drive recorders overwrite image data related to non-sudden braking events, leading to loss of critical accident data, and occupy limited storage space unnecessarily due to improper overwriting policies.
Innovation Solution
A drive recorder system that continuously records and stores image data sets, using a microcomputer to acquire, store, and detect events, sending situation data to an external server for determination on whether to prohibit overwriting, ensuring only critical data is protected from overwriting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data is prohibited from being overwritten based on large acceleration detection, then critical accident data is preserved, but storage space is wasted on non-critical data
Solution Approach 1:
The system sends situation data to an external determination apparatus that analyzes whether the image data should be protected from overwriting. The determination result is fed back to the drive recorder, which then adjusts its overwriting prohibition accordingly. This feedback mechanism ensures accurate identification of critical accident data while avoiding unnecessary protection of non-critical data, thus optimizing storage space utilization.
Solution Approach 2:
An external determination apparatus acts as an intermediary between the drive recorder and the image data protection decision. This intermediary analyzes the situation data (including acceleration, speed, location, and image content) and provides expert judgment on whether the data represents a critical accident, thereby improving the accuracy of data preservation without wasting storage space.
2Reliability
If all image data is protected from overwriting, then no critical data is lost, but storage capacity is insufficient for continuous recording
Solution Approach 1:
Instead of uniformly protecting all image data from overwriting, the system applies differential protection based on local characteristics of each data set. The determination apparatus evaluates each situation individually and provides targeted protection only for data sets that represent critical accidents or important events, allowing non-critical data to be overwritten when storage is full.
Solution Approach 2:
The system dynamically changes the protection status parameter of image data based on analysis of situation parameters (acceleration, speed, location, image content). Data sets are transitioned between protected and non-protected states according to their evaluated importance, enabling efficient use of limited storage capacity while preserving critical information.
3Ease of operation
If image data is overwritten based on predetermined storage area prohibition, then storage management is simplified, but critical accident data without large acceleration is lost
Solution Approach 1:
The system performs preliminary analysis of situation data (acceleration, speed, location, and image content) before making the overwriting decision. The external determination apparatus evaluates whether the current situation represents a critical accident and provides advance guidance on which data should be protected, preventing loss of critical accident data that does not involve large acceleration events.
Solution Approach 2:
The external determination apparatus provides feedback on whether each image data set should be protected from overwriting, based on comprehensive analysis of situation parameters. This feedback mechanism replaces simple predetermined prohibition rules with intelligent, situation-aware decision-making, ensuring critical accident data is retained while maintaining practical storage management.
Data Source
AI summary
A drive recorder sends to a server a moving image file showing a situation of surroundings of vehicle in a moment at which large acceleration occurred. The server determines, based on moving image file, whether or not to prohibit from being overwritten moving image file showing surroundings of vehicle in a moment at which an event occurred. Based on a determination result determined by the server, the drive recorder prohibits from being overwritten an image data set showing the moment 1) at which the event occurred or 2) optionally before and/or after the event occurred including the moment at which the event occurred. Thus, the drive recorder can surely prohibit the image data set to be prohibited from being overwritten. Moreover, it is possible to effectively use a storage area of a memory by allowing overwriting image data set that does not necessarily need to be prohibited from being overwritten.