Steering Wheel Haptic Feedback for Obstacle Detection
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Solution Overview
Problem
Existing driving assistance systems rely on acoustic signals and visual displays to inform drivers of obstacles, which can be distracting and do not provide intuitive feedback on the vehicle's environment, especially regarding the distance to objects and potential collision risks.
Innovation Solution
A method that uses haptic feedback through adjustable steering resistance, where the counter-torque profile is determined based on the distance to detected objects, allowing the driver to feel changes in steering resistance that indicate the presence and proximity of obstacles, thereby guiding them to a collision-free trajectory without the need for visual or auditory alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If acoustic signals and visual displays are used to inform drivers of obstacles, then driver information about obstacles is provided, but driver distraction increases and intuitive feedback on vehicle environment is reduced
Solution Approach 1:
The patent replaces acoustic and visual signal systems with a mechanical feedback system that directly couples obstacle information to the steering wheel through variable counter-torque. The counter-torque mechanism translates distance data into tactile resistance, allowing drivers to perceive obstacle proximity through natural steering interactions rather than distracting displays or sounds.
Solution Approach 2:
The steering wheel acts as an intermediary device that mediates between the detection system and the driver. Instead of presenting raw data through displays or sounds, the system uses the steering wheel's natural interaction to convey obstacle information through variable resistance, making the feedback intuitive and non-distracting.
2Loss of information
If visual displays and auditory alerts are used to convey obstacle proximity, then obstacle information is communicated, but driver focus on the road is reduced
Solution Approach 1:
The steering system serves itself by using its own mechanical properties to convey information. The variable counter-torque is generated and applied through the existing steering mechanism, eliminating the need for separate visual or auditory alert systems and allowing the steering wheel to provide both control and information functions simultaneously.
3Ease of operation
If haptic feedback through steering resistance is used, then intuitive feedback on obstacle proximity is provided, but system complexity increases
Solution Approach 1:
The steering wheel is given multiple functions: it serves as both the control interface for vehicle direction and the information display for obstacle proximity. By encoding distance information into variable counter-torque, the same mechanical component performs dual roles, reducing the need for additional dedicated feedback devices and simplifying the overall system architecture.
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 driver awareness of the vehicle's environment by providing intuitive, hands-on feedback that focuses attention on the road, reducing the need for distracting signals and conveying information about obstacle proximity and collision risks effectively.
Implementation Method 1
an actuator which is set up to generate a counter-torque that can be felt on the steering wheel
Implementation Method 2
haptic feedback through adjustable steering resistance
Data Source
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AI summary
The invention relates to a method for driver assistance, wherein a driver of a vehicle (1) is haptically informed, by a change in steering resistance, that an object (2) is in the way. It is provided that objects (2) are detected within a detection range (8) of an environment detection device (11), free path lengths with respect to adjustable steering angles are determined (the free path lengths being defined by the distances of the vehicle (1) to the detected objects (2)), a counter-torque profile is determined for each adjustable steering angle, and the steering resistance is subjected to a counter-torque value T during a steering movement by the driver, which is determined from the counter-torque profile. The invention also relates to a driver assistance system configured to carry out the method.