Haptic Seat Risk Alert System with Response Delay Compensation
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Solution Overview
Problem
Existing vehicle systems fail to effectively transmit risk information to drivers by considering their response delay, leading to unnecessary or misleading alerts due to lack of adaptation to the driver's operational state.
Innovation Solution
A system that calculates risk potential based on the driver's response delay and transmits this information through haptic inputs to the driver's seat, adjusting the seat's angle to indicate potential deviations from the lane, taking into account the driver's operational state and road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If information is transmitted to the operator without considering response delay, then the operator is informed of obstacles, but unnecessary or misleading alerts are generated
Solution Approach 1:
The system performs preliminary action by calculating risk potential at a future position that accounts for the operator's response delay. Instead of alerting based on current position only, the system predicts where the vehicle will be when the operator responds and calculates risk at that future position, providing advance warning of potential hazards that will materialize after the operator's natural response time.
Solution Approach 2:
The system applies dynamics by making the future position dynamic rather than fixed. The future position is calculated based on the operator's estimated response delay, which varies depending on the operator's state. This allows the risk assessment to adapt dynamically to the operator's current condition, ensuring alerts are timely and relevant without being premature or misleading.
2Loss of time
If the future position is set remoter for operators with longer response delay, then timely alerts are provided, but the system complexity increases
Solution Approach 1:
The system performs preliminary action by pre-calculating the future position based on estimated response delay before a hazard actually materializes. This allows the system to provide timely alerts at the current moment that will be relevant when the operator responds, effectively compensating for response time without requiring complex real-time adjustments during the operator's response period.
Solution Approach 2:
The system applies parameter changes by adjusting the future position parameter based on the operator's response delay characteristics. Rather than creating a complex adaptive system, the patent simplifies the approach by directly modifying the future position parameter - operators with longer response delays have their future position set remoter, while those with shorter delays have it set nearer, providing timely alerts through a straightforward parameter adjustment.
3Ease of operation
If haptic input is used to transmit risk potential, then information is conveyed intuitively, but the device complexity increases
Solution Approach 1:
The system applies mechanics substitution by replacing complex visual or auditory information transmission with haptic feedback through the seat. Instead of requiring the operator to process complex displays or sounds, the system uses intuitive tactile sensations - vibrations or pressure changes on the seat surface - to convey risk potential, making information transmission more natural and immediate while leveraging the existing mechanical seat structure.
Solution Approach 2:
The system uses the seat as an intermediary to transmit risk information. Rather than directly presenting complex data to the operator's senses, the haptic feedback system acts as an intermediary that translates risk potential calculations into intuitive tactile sensations through the seat, simplifying the information transmission process while maintaining effectiveness.
Data Source
AI summary
A driving assisting for calculating risk potential by considering a response delay by the driver and transmitting information related to the risk potential to the operator in a haptic manner. A controller is provided to estimate the response delay based on an operation performed by the operator. Based on the estimated response delay, the controller calculates a future position at which the risk potential is to be calculated. The longer the response delay, the remoter the future position is. The shorter the response delay, the nearer the future position is. The calculated risk potential at the future position may be transmitted to the operator via a pressing force from one of right and left side portions of a driver's seat occupied by the operator.