Multi-Zone Temperature Stimulus for Driver Alertness Maintenance
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Solution Overview
Problem
Existing alertness maintenance systems for drivers, such as those using temperature stimuli, often fail to achieve sufficient alerting effects due to the high sensitivity of the neck area, leading to habituation and reduced effectiveness.
Innovation Solution
An alertness maintenance apparatus that generates multiple types of temperature stimuli, including those for the hands, face, and torso, with intensities sequentially increased and fluctuated to prevent habituation, using a stimulation controller and air conditioner system to deliver targeted temperature adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature stimulus is applied to the neck area to maintain driver alertness, then the alerting effect is enhanced due to high sensitivity, but the driver becomes accustomed to the stimulus more quickly, reducing long-term effectiveness
Solution Approach 1:
The patent divides the temperature stimulus into multiple independent target areas (hands, face, torso) rather than concentrating on a single neck area. This segmentation allows the system to rotate through different body parts, preventing the driver from becoming accustomed to a constant stimulus pattern while maintaining continuous alertness through distributed thermal stimulation.
Solution Approach 2:
The patent implements periodic rotation of temperature stimulus intensity across different target areas. The stimulation controller alternates which body part receives the strongest stimulus in a cyclical manner, creating a dynamic, time-varying stimulus pattern that maintains driver alertness while preventing habituation to a static stimulus configuration.
2Reliability
If uniform temperature stimulus is applied across all body areas, then the system complexity is reduced, but the alerting effectiveness is diminished due to lack of targeted stimulation
Solution Approach 1:
The patent applies different temperature stimulus intensities to different local body areas (hands, face, torso) based on their individual sensitivity characteristics. The stimulation controller selectively adjusts the strength of temperature stimuli for each target area, providing optimized local stimulation rather than uniform global stimulation, thereby enhancing overall alerting effectiveness.
Solution Approach 2:
The patent introduces dynamic control of temperature stimulus distribution across multiple target areas. The stimulation controller continuously adjusts which body part receives the primary stimulus and rotates the intensity distribution over time, transforming a static uniform stimulus into a dynamic adaptive stimulus pattern that maintains driver engagement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances alerting effects by targeting highly sensitive body areas and varying stimulus intensities, significantly increasing the duration of alertness maintenance compared to uniform temperature stimuli.
Implementation Method 1
a temperature stimulus to a hand of the subject person and also including a temperature stimulus to a face of the subject person or a temperature stimulus to a torso of the subject person via a seat on which the subject person sits
Data Source
AI summary
An alertness maintenance apparatus includes a stimulation controller that is configured to cause a stimulation device to generate multiple types of temperature stimuli maintaining an alert state of a subject person, the temperature stimuli including a temperature stimulus to a hand of the subject person and also including a temperature stimulus to a face of the subject person or a temperature stimulus to a torso of the subject person via a seat on which the subject person sits.