Vehicle Drive Recorder Ring Buffer Data Preservation
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Solution Overview
Problem
Existing vehicle information recording systems can only record and store image data from the accident vehicle, limiting the ability to gather information from surrounding vehicles, and face challenges with data transmission costs and potential destruction or loss of recording devices.
Innovation Solution
An information recording system that includes multiple drive recorders with ring buffers and save memories, allowing for the recording and transmission of abnormal-status information from both the accident vehicle and surrounding vehicles, with a server to accumulate and manage this data, reducing costs and ensuring data preservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a drive recorder records images for a specific time length, then the recording duration is limited, but the image data from surrounding vehicles is lost due to overwrite recording
Solution Approach 1:
The system performs preliminary actions by having surrounding vehicles record and store image data in advance in their save memories before the accident occurs. When an accident is detected, the save request is transmitted to vehicles that have already prepared their recorded data, ensuring the data is preserved before any potential overwrite occurs.
Solution Approach 2:
The save memory acts as an intermediary storage device between the ring buffer and the final data preservation. It temporarily holds the recorded image data, allowing it to be transmitted and saved from other vehicles even after the original recording vehicle stops recording or overwrites data in its ring buffer.
2Loss of information
If only the accident vehicle's drive recorder is used for verification, then the investigation scope is limited, but information from surrounding vehicles cannot be obtained
Solution Approach 1:
The system makes the drive recorder universal by enabling it to perform multiple functions: recording its own images in the ring buffer, receiving save requests from other vehicles, transmitting its recorded data to other vehicles, and participating in a networked information collection system that serves the entire accident investigation community.
Solution Approach 2:
The invention merges the information collection capabilities of multiple drive recorders into a unified accident investigation system. By combining the save memory functionality with the existing ring buffer, it integrates data from multiple vehicles into a comprehensive accident status information set.
3Loss of information
If drive recorder transmits image information externally, then communication cost increases, but data transmission capability is improved
Solution Approach 1:
The system enables self-service by allowing each drive recorder to autonomously transmit its recorded image data to other vehicles that need it for accident verification. This peer-to-peer data sharing eliminates the need for centralized server communication, reducing overall communication costs while maintaining data transmission capability.
Data Source
AI summary
An accident judgment device (105) judges whether or not an accident has occurred based on a detection signal of an impact sensor (104). Upon judging that an accident has occurred, an image saving device (106) extracts an image within several seconds before and after occurrence of the accident from a ring buffer (103) to save the same in a save memory (107). Upon judging that the accident has occurred, an image-record requesting device (108) transmits an image-recording request to a drive recorder (10) of target vehicles existing in the vicinity of the accident spot. Upon receiving the image-recording request, an image saving device (106) of the drive recorder (10) on the target vehicle extracts the image within several seconds before and after occurrence of the accident from the ring buffer (103) to save the same into the save memory (107).