Roadside Apparatus Sleep-Mode Control for Battery-Limited Notification
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Solution Overview
Problem
Existing technologies do not effectively address power consumption reduction in portable roadside apparatuses designed to notify pedestrians and vehicles of information, which are typically battery-powered.
Innovation Solution
A control system that includes a roadside apparatus capable of shifting to a sleep mode with reduced power consumption after a predetermined time, and a server that transmits cancellation instructions to return to operation mode when specific conditions are met, along with battery capacity management to deactivate or stop operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the roadside apparatus operates continuously to notify vehicles and pedestrians, then the information notification function is maintained, but the power consumption increases
Solution Approach 1:
The roadside apparatus dynamically transitions between operation mode and sleep mode based on real-time conditions. The control unit monitors vehicle detection status and battery capacity, switching modes adaptively to balance notification reliability with power conservation, thereby resolving the contradiction between continuous operation and energy consumption.
Solution Approach 2:
The system changes operational parameters by adjusting the apparatus state between full operation and sleep modes. When in sleep mode, power consumption is reduced while maintaining the ability to quickly resume operation when needed, thus addressing the trade-off between continuous notification and energy usage.
2Use of energy by moving object
If the roadside apparatus enters sleep mode to reduce power consumption, then the power consumption is reduced, but the response time to notify vehicles and pedestrians increases
Solution Approach 1:
The control unit performs preliminary monitoring of vehicle detection status and battery capacity before transitioning to sleep mode. This preliminary action ensures that the apparatus only enters sleep mode when safe to do so, preventing unnecessary delays in notification while still achieving power conservation during low-activity periods.
Solution Approach 2:
The system implements feedback mechanisms where the control unit continuously monitors external conditions (vehicle detection) and internal conditions (battery capacity). This feedback enables the apparatus to exit sleep mode promptly when notification is needed, thus minimizing response time loss while maintaining power savings.
3Duration of action of moving object
If the roadside apparatus operates with limited battery capacity, then the portability is maintained, but the operation duration is reduced
Solution Approach 1:
The roadside apparatus employs periodic operation by alternating between operation mode and sleep mode. This periodic action extends the effective operation duration by utilizing sleep periods for power conservation, allowing the apparatus to function longer on limited battery capacity while maintaining portability.
Solution Approach 2:
The control unit implements partial operation by selectively activating notification functions based on detected conditions and battery status. When battery capacity is low, the apparatus performs only essential notifications rather than continuous operation, thereby extending operational duration while maintaining the core notification function.
Data Source
AI summary
A control system includes a roadside apparatus, and a server capable of communicating with the roadside apparatus, the roadside apparatus is configured to shift from an operation mode to a sleep mode in which power consumption is reduced more than in the operation mode when a predetermined time period has elapsed after a start of operation, the server is configured to transmit a cancellation instruction for the sleep mode to the roadside apparatus when a first condition has been satisfied, and the roadside apparatus is configured to cancel the sleep mode and return to the operation mode in response to receipt of the cancellation instruction.