Drive Recorder Event Window Control for Relevant Video Capture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive recorders struggle to accurately save video information relevant to vehicle accidents, driving conditions, or safe driving guidance without excess or deficiency, as the length of useful video segments varies based on different traveling conditions.
Innovation Solution
A drive recorder that includes a camera, video recording unit, abnormal event detection unit, time period determination unit, and data saving unit, which determines and saves video segments based on factors such as vehicle acceleration, location, time of day, illuminance, weather, and biological information to ensure precise capture of relevant events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed time width is used for recording video segments regardless of traveling conditions, then the device complexity is reduced, but the measurement precision of useful video segments deteriorates
Solution Approach 1:
The patent applies dynamics by making the video recording time width variable rather than fixed. The control unit dynamically adjusts the time width based on detected traveling conditions (vehicle speed, acceleration, location, time of day, illuminance, weather, and driver biological information). This allows the system to adapt the recording duration to match the actual duration of relevant driving events, improving measurement precision without excessive complexity increase through automated condition-based adjustment.
Solution Approach 2:
The patent changes the parameter of recording time width based on multiple traveling condition parameters. Instead of using a single fixed value, the system modifies the time width parameter according to detected conditions such as vehicle speed, acceleration magnitude, location type, time of day, illuminance levels, weather conditions, and driver biological states. This parameter adaptation ensures that video segments capture the complete duration of relevant events under varying operating conditions.
2Reliability
If video segments are extended to cover all possible traveling conditions, then the reliability of capturing relevant events is improved, but the loss of substance (storage space) increases
Solution Approach 1:
The patent applies local quality by tailoring the video recording duration to specific local traveling conditions rather than using a uniform extended duration for all situations. The control unit determines appropriate time widths based on local conditions such as vehicle speed, acceleration, location type, time of day, illuminance, weather, and driver state. This ensures that each video segment has just enough duration to capture the relevant event for that specific condition, maintaining reliability while avoiding excessive storage consumption from uniformly extended recordings.
3Adaptability or versatility
If multiple traveling condition parameters are monitored to determine video segment length, then the adaptability of the recording system is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the control unit to handle multiple different traveling condition parameters through a single integrated system. The control unit receives and processes various input parameters (vehicle speed, acceleration, location, time of day, illuminance, weather conditions, and driver biological information) and universally applies them to determine the appropriate video recording time width. This multi-functional approach allows the system to adapt to diverse traveling conditions without requiring separate specialized mechanisms for each parameter, thereby improving adaptability while managing device complexity through consolidation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A drive recorder includes a video recording unit that records a video captured by a camera mounted on a vehicle in association with the time of day, an abnormal event detection unit that detects an abnormal event, a time period determination unit that determines a time period that includes the time of day when the abnormal event is detected and that has a length determined based on a traveling condition other than the speed of the vehicle, a video extraction unit that extracts a video of the determined time period from the video recording unit, and a data saving unit that records, or transmits to an external device, a file including the extracted video as an erasure prohibited object.