Steering Wheel Alert Backup for Driving Assistance Handover
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Solution Overview
Problem
Existing driving assistance systems struggle to smoothly transfer authority related to vehicle control and surrounding monitoring between the vehicle system and the driver, especially when the power supply from the vehicle's power source is stopped.
Innovation Solution
A driving assistance device equipped with an information display unit, an information notification unit on the steering wheel, a notification control unit, and an alarm unit connected via a communication unit, which can output an alarm using an internal power source when the main power supply is stopped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply from the vehicle power source is stopped, then energy consumption is reduced, but the ability to notify the driver of authority transfer is lost
Solution Approach 1:
The alarm unit is equipped with an internal power source that is prepared in advance to take over when the main power source stops supplying power. This preliminary preparation ensures that the notification function can continue without interruption, resolving the contradiction between energy conservation and notification reliability.
Solution Approach 2:
The internal power source acts as an intermediary between the main power source and the alarm unit. When the main power source is unavailable, the internal power source mediates to ensure continuous operation of the notification system, maintaining reliability while allowing the main power source to remain off.
2Reliability
If the alarm unit uses the internal power source, then notification reliability is improved during power outages, but device complexity increases
Solution Approach 1:
The alarm unit is designed with multi-functionality to operate in two power supply modes: normal operation using the vehicle power source and emergency operation using the internal power source. This universal design allows a single device to handle multiple scenarios, improving reliability without requiring separate systems for each mode.
Solution Approach 2:
The alarm unit is self-sufficient by incorporating its own internal power source, allowing it to independently notify the driver even when the vehicle power source is unavailable. This self-service capability ensures notification reliability while avoiding the need for complex external backup systems.
3Loss of information
If the notification system operates continuously, then driver awareness is maintained, but energy consumption increases
Solution Approach 1:
The notification system dynamically switches between two power supply sources based on the operational state. During normal operation, it uses the vehicle power source; during power outages, it automatically transitions to the internal power source. This dynamic adaptation maintains driver awareness while optimizing energy consumption by using the appropriate power source for each condition.
Solution Approach 2:
The system changes the power supply parameter from the vehicle power source to the internal power source when the vehicle power source becomes unavailable. This parameter change allows the notification system to maintain operation and driver awareness while adapting to different energy availability conditions, effectively managing the trade-off between continuous notification and energy consumption.
Data Source
AI summary
A driving assistance device comprises: an information display unit configured to display travel information based on the driving assistance function based on a power supply from a power source mounted on a vehicle having a driving assistance function; an information notification unit provided on a steering wheel of the vehicle and configured to make a notification of an operation state of the driving assistance function by turning on or off; a notification control unit configured to operate based on a power supply from the power source and control the notification based on operation information indicating the operation state of the driving assistance function; and an alarm unit connected to the notification control unit via a communication unit and capable of outputting an alarm based on power of an internal power source different from the power source.