Vehicle Haptic Warning Assembly for Distracted Pedestrians
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Solution Overview
Problem
Vehicles operating in automated modes face challenges in effectively warning pedestrians and cyclists, particularly those using electronic devices with headphones, as they cannot perceive conventional visual or acoustic signals.
Innovation Solution
An assembly and method that utilize tactile and haptic warning signals, including blasts of air, thermal radiation, and vibrations, generated by sensors and signal generators to alert individuals in the vehicle's environment, ensuring they are aware of an impending vehicle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual or acoustic warning signals are used to indicate vehicle movement to people in the environment, then the warning system is simple and conventional, but distracted people using electronic devices with headphones cannot perceive these signals
Solution Approach 1:
The warning system is segmented into multiple independent signal generators (acoustic, visual, and tactile components) that can be activated separately or in combination. Each signal generator targets different sensory channels, ensuring that at least one modality reaches distracted individuals regardless of which senses are blocked by device usage.
Solution Approach 2:
The control device is designed with multi-functionality to manage multiple types of signal generators (acoustic horns, visual lights, tactile vibration units). This universal control system can select and activate appropriate signal types based on detected distraction levels, making the warning system adaptable to various distraction scenarios without requiring separate dedicated systems for each signal type.
2Reliability
If multiple signal generators (acoustic, visual, tactile) are deployed to ensure warning effectiveness, then warning reliability improves, but device complexity increases
Solution Approach 1:
Multiple signal generators of different types (acoustic horns, visual lights, tactile vibration units) are merged into a single integrated assembly mounted on the vehicle. This combined structure allows coordinated activation of multiple signal types simultaneously or sequentially, ensuring comprehensive warning coverage while managing system complexity through unified mounting and control architecture.
Solution Approach 2:
The control device acts as an intermediary between the detection system and multiple signal generators. It processes sensor data to determine distraction levels and automatically selects which signal generators to activate, serving as a mediator that simplifies the complexity by providing centralized intelligent control rather than requiring independent control circuits for each signal type.
3Reliability
If tactile signal generators are activated to warn distracted people, then attention direction improves, but energy consumption increases
Solution Approach 1:
The tactile signal generators operate dynamically with variable intensity and duration based on real-time detection of distraction levels. The control device adjusts the activation parameters (strength, timing, duration) of tactile signals to match the detected distraction severity, ensuring effective attention capture while minimizing unnecessary energy consumption during low-distraction scenarios.
Solution Approach 2:
Tactile signal generators are activated periodically or in pulsed sequences rather than continuously, especially when distraction is detected. This periodic activation pattern maintains attention capture effectiveness while significantly reducing overall energy consumption compared to continuous operation, allowing the system to reset and re-engage attention as needed.
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
Enhances traffic safety by ensuring that individuals, including distracted ones, are alerted to a vehicle's starting movement, preventing accidents by directing their attention through haptic means that are independent of visual or auditory distractions.
Implementation Method 1
The at least one signal generator is designed as a pressurized air nozzle, infrared source, and/or a vibration unit. The pressurized air nozzle may be connectable, for example, to a compressor or a compressed air reservoir in order to be able to generate a blast of air when necessary.
Implementation Method 2
The use of an infrared source allows for the emission of thermal radiation, which can be used to heat a person.
Implementation Method 3
A vibration unit arranged on the vehicle is used to create an imbalance. In particular in the case of people who are touching the vehicle or leaning against the vehicle, such an oscillation can direct the attention of the person to the vehicle.
Data Source
AI summary
An assembly is for outputting tactile warning signals in a vehicle environment of a vehicle and includes at least one sensor for scanning the vehicle environment and for detecting sensor data, and at least one signal generator for outputting a warning signal that is tactilely and/or haptically perceptible to people in the vehicle environment. The assembly further includes a control device for receiving and evaluating the sensor data and for generating control commands for actuating the signal generator in the event of a person being detected in the vehicle environment.