Dash Cam Motion Detection Power Gating for Parking Mode
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Solution Overview
Problem
The existing driving video recording systems consume significant current in parking recording mode due to continuous video recording and event detection, leading to reduced battery life.
Innovation Solution
A method is introduced to minimize power consumption by controlling the power supply to the capturing unit 110, an event detection unit 120, and a main body 200, and a computer-readable recording medium on which a program for executing the method for reducing power consumption of a driving video recording system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous video recording is performed in parking recording mode, then recording reliability is maintained, but power consumption increases significantly
Solution Approach 1:
The system performs video recording periodically based on event detection rather than continuously. The event detection unit triggers recording only when motion or impact is detected, creating a periodic action pattern that reduces power consumption while maintaining recording reliability for important events.
Solution Approach 2:
The event detection function is extracted and separated from the main video recording system. The event detection unit operates independently with minimal power consumption, and only triggers the main recording system when needed, thereby reducing overall power consumption while maintaining recording reliability.
2Reliability
If event detection sensor is built into the camera and always powered on, then event detection reliability is improved, but current consumption increases
Solution Approach 1:
The event detection sensor operates in a periodic manner, being activated only when motion or impact events occur rather than continuously. This periodic operation maintains event detection reliability for critical events while significantly reducing current consumption during normal parking recording mode.
Solution Approach 2:
The power state of the event detection sensor is made dynamic rather than static. The sensor can switch between active and sleep states based on system mode, allowing reliable event detection when needed while minimizing power consumption during normal operation.
3Reliability
If SERDES is kept operating for object detection signal transmission, then communication reliability is maintained, but power consumption increases
Solution Approach 1:
The SERDES interface operates periodically based on event detection triggers rather than continuously. When an event is detected, the SERDES activates to transmit object detection signals reliably. This periodic operation maintains communication reliability for critical events while reducing power consumption during normal operation.
Solution Approach 2:
The SERDES communication function is extracted and activated only when needed for event signal transmission. The main body and camera can enter low-power states with SERDES inactive, and only activate communication when events require signal transmission, thereby reducing power consumption while maintaining communication reliability.
Data Source
AI summary
A driving video recording system includes: a camera that includes a capturing unit capturing a video, an event detection unit detecting an event, and a camera connector for interfacing with a main body; and a main body that includes an image processing unit receiving and processing an image captured by the capturing unit, a power supply unit supplying power for an operation of the driving video recording system, a control unit controlling an operation of the power supply unit, and a main body connector for interfacing with the camera, in which the control unit may control a power supply to the capturing unit among the components of the camera to be turned off, and the power supply to the event detection unit to be turned on, and control the power supply to the image processing unit among the components of the main body to be turned off and the power supply to the power supply unit to be turned on.