Drive Recorder Selective Video Transmission via Dual Acceleration Thresholds
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Solution Overview
Problem
Existing drive recorders on vehicles transmit large amounts of data whenever acceleration above a predetermined threshold is detected, leading to high transmission costs and inefficiencies, particularly as they are not designed to manage and retrieve images from events like sudden braking in automobiles effectively.
Innovation Solution
A drive recorder with a sensor to measure impact strength, a determination unit to assess if the impact is within a predetermined abnormality or accident reference range, and a notification and video transmission unit to selectively transmit relevant video data to a server upon request, allowing for efficient data management and retrieval of critical events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive recorder transmits images every time acceleration above a predetermined threshold is detected, then the server can acquire dangerous driving images, but the transmission amount becomes very large and transmission costs increase
Solution Approach 1:
The patent changes the threshold parameter for transmission by introducing two distinct acceleration thresholds: a first threshold (higher value) for triggering image transmission, and a second threshold (lower value) for detecting dangerous driving events. This parameter differentiation allows the system to transmit images only for significant events while still recording and notifying about milder dangerous driving behaviors, thereby reducing unnecessary transmissions while maintaining reliable acquisition of critical images.
2Device complexity
If the drive recorder uses a single threshold for both detecting dangerous driving and transmitting images, then the system is simple, but it cannot distinguish between minor and major events leading to excessive transmissions
Solution Approach 1:
The patent segments the acceleration detection range into two distinct zones using two different thresholds. The first threshold (higher) segments major events requiring image transmission, while the second threshold (lower) segments minor dangerous driving events. This segmentation allows the system to handle different event types differently, improving transmission efficiency by avoiding unnecessary transmissions for minor events while ensuring critical events are captured.
3Reliability
If the drive recorder transmits all images upon detecting emergency braking, then no critical data is lost, but the transmission amount becomes unmanageable for automobile applications
Solution Approach 1:
The patent applies parameter changes by establishing a hierarchy of thresholds: a first (higher) threshold for triggering image transmission and a second (lower) threshold for dangerous driving detection. This allows the system to retain all dangerous driving data while selectively transmitting only the most critical images, thereby maintaining data completeness while managing transmission volume effectively for automobile applications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces unnecessary data transmission, allows for targeted acquisition of images from specific events, and ensures that critical accident data is not lost by transmitting it proactively when an accident is detected.
Implementation Method 1
an acceleration sensor that measures a strength of an impact applied to the drive recorder
Data Source
AI summary
[Problem] A drive recorder is provided that enables acquisition of a desired image captured when an impact with a strength meeting a predetermined condition has been measured. [Means of Solution] In the drive recorder 1, the travel recording module 51 records captured moving-imagery data 60 captured by a camera 18 installed on a vehicle. The acceleration sensor 19 measures the acceleration of the vehicle. When it is determined that the acceleration measured by the acceleration sensor 19 is within an abnormality range, the travel recording module 51 notifies the server 4 at a predetermined time point of the time point of dangerous driving at which the acceleration within the abnormality range was measured. The travel recording module 51, when receiving from the server 4 a request for video transmission containing the time point of dangerous driving, selects, from the recorded captured moving-imagery data 60, the captured moving-imagery data 60 associated with a predetermined time period including the time point of dangerous driving contained in the request for video transmission, and transmits this data to the server.