Event Data Recorder Power Management via Periodic Image Capture
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Solution Overview
Problem
Existing event data recorders (EDRs) have limited operational time in parking mode due to high power consumption, which can result in missed event recordings and difficulty starting the car when the automotive battery becomes flat.
Innovation Solution
The EDR employs an image-recording module with a timing circuit that periodically activates the image-capturing circuit in parking mode for low-quality photograph or video recording functions, consuming less power and extending operational time, and includes a processing circuit to detect specific events and send a wakeup signal to activate the control module for video recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image-capturing circuit continuously performs video recording function in parking mode, then event recording completeness is improved, but power consumption increases and operational time is limited
Solution Approach 1:
The patent implements periodic action by having the image-capturing circuit alternate between photograph mode (low power) and video recording mode (high power) based on event detection. The processing circuit periodically checks for events and only activates full video recording when necessary, thereby reducing overall power consumption while maintaining event recording reliability.
Solution Approach 2:
The system dynamically adjusts the operational mode of the image-capturing circuit between photograph mode and video recording mode based on real-time event detection. This dynamic switching allows the system to optimize power consumption according to actual needs while ensuring complete event recording when events occur.
2Ease of operation
If the EDR uses built-in batteries for power supply in parking mode, then portability is improved, but operational time is limited when battery becomes flat
Solution Approach 1:
By implementing periodic photograph capture instead of continuous video recording, the system significantly reduces power consumption from the built-in batteries, thereby extending operational time while maintaining portability.
Solution Approach 2:
The system changes the operational parameters of the image-capturing circuit by switching between photograph mode (low power consumption) and video recording mode (high power consumption) based on event detection, thereby extending battery life while maintaining functionality.
3Duration of action of stationary object
If the EDR reduces power consumption in parking mode, then operational time is extended, but event detection accuracy may be compromised
Solution Approach 1:
The processing circuit continuously monitors for events and provides feedback to the image-capturing circuit. When an event is detected, the system switches to video recording mode to ensure accurate capture, thereby maintaining event detection accuracy while extending operational time through low-power photograph mode during normal conditions.
Solution Approach 2:
The system dynamically adjusts its operational state between low-power photograph mode and high-power video recording mode based on real-time event detection, ensuring that event detection accuracy is maintained when needed while extending operational time during normal operation.
Data Source
AI summary
An event data recorder (EDR) is configured to operate in a driving mode and a parking mode. In the driving mode, the EDR is configured to perform high quality video recording using an image-capturing circuit. In the parking mode, the EDR is configured to periodically activate the image-capturing circuit for event detection and start to perform low quality video recording after detecting a specific event.