Steering Wheel Brake Trigger Using Pull-Force Sensing
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Solution Overview
Problem
Existing braking systems in vehicles, particularly those integrated with the steering mechanism, face challenges such as operational errors due to the proximity of pedals and complexity/cost issues, leading to unreliable emergency braking in unstable conditions.
Innovation Solution
A steering wheel assembly with a force sensor, photoelectric sensor, or switch connected to a controller that triggers braking actions based on the driver's pulling force, allowing for distinct threshold-based braking actions without affecting traditional driving modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brake button is provided on the steering wheel, then the braking function is improved, but the ease of operation deteriorates because the driver cannot quickly and accurately press the button in an emergency
Solution Approach 1:
The patent replaces the mechanical button-pressing system with a force detection system that automatically triggers braking. The force sensor detects when the driver pulls the steering wheel toward themselves, eliminating the need for manual button pressing and enabling instant braking response.
Solution Approach 2:
The steering wheel assembly performs self-detection and self-triggering of braking. The force sensor integrated into the steering wheel automatically detects the driver's pulling action and sends signals to the control unit, which then activates the braking system without requiring additional driver input.
2Extent of automation
If pressure sensors are attached to the steering wheel to measure grip tightness, then automatic braking control is improved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts the essential function from a complex array of pressure sensors and implements it through a single force sensor. Instead of using multiple sensors to measure grip tightness, the invention uses one force sensor to detect the pulling force, simplifying the system while maintaining automatic braking control.
Solution Approach 2:
The patent changes the detection parameter from grip tightness (pressure distribution) to pulling force (single directional force). This parameter change allows the use of a simpler force sensor instead of multiple pressure sensors, reducing system complexity while achieving automatic braking control.
3Measurement precision
If a force sensor is provided on the steering shaft with supporting springs, then the detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent merges the force sensor integration with the existing steering shaft structure. The force sensor is incorporated into the steering shaft assembly, and the supporting springs are integrated into the same structure, combining multiple functions into a unified system that achieves accurate force detection without excessive complexity.
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
The solution provides a reliable, low-cost, and user-friendly emergency braking system that minimizes the risk of accelerator-to-brake confusion, ensuring effective braking operations across various vehicle types and energy sources.
Implementation Method 1
A force sensor is provided between the rim body and the spokes, or on one side of the rim body away from a driver, or between the spokes and the steering shaft, or on the steering shaft
Implementation Method 2
a photoelectric sensor, a mechanical wave sensor or a switch are provided between the rim body and the spokes, or on one side of the rim body away from a driver
Implementation Method 3
a photoelectric sensor, a mechanical wave sensor or a switch are provided between the rim body and the spokes
Data Source
AI summary
A steering wheel assembly having a braking function, including: a steering wheel, a steering shaft, and a controller. The steering wheel is connected to one end of the steering shaft. The steering wheel includes a rim body and spokes. The rim body is connected to the steering shaft via the spokes. A force sensor, a photoelectric sensor, a mechanical wave sensor or a switch are provided between the rim body and the spokes, or provided on one side of the rim body away from a driver, or provided between the spokes and the steering shaft, or provided on the steering shaft, and are connected to the controller. The controller is connected to a braking system.