Adaptive Vehicle Sunvisor Positioning for Dynamic Glare Blocking
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Solution Overview
Problem
Existing autonomous sunvisors struggle to adapt smoothly to constant changes in light direction and intensity during driving, leading to sudden or delayed movements that can compromise safety and ergonomics.
Innovation Solution
A retractable sunvisor system with a unified sun sensor, control unit, and acceleration sensor that measures light angle and intensity, along with vehicle movement, to calculate and execute precise sliding and rotating movements to block glare effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors and complex control systems are used to achieve precise sunvisor positioning, then the accuracy of glare blocking is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple sensor functions into a single integrated sensor unit that simultaneously detects light intensity, light direction, and vehicle movement. This merging approach achieves precise positioning accuracy while reducing the number of separate components and simplifying the overall system architecture.
Solution Approach 2:
The control unit is designed to perform multiple functions: processing data from the integrated sensor, calculating optimal sunvisor position, determining glare direction, and controlling the positioning mechanism. This multi-functionality reduces the need for separate dedicated components for each function.
2Speed
If rapid response to light changes is implemented, then the responsiveness to glare is improved, but false movements and instability increase
Solution Approach 1:
The system continuously monitors light conditions through the sensor and adjusts the sunvisor position based on real-time feedback. The control unit processes ongoing data from the sensor about light intensity and direction, making incremental adjustments to achieve stable positioning rather than reactive movements.
Solution Approach 2:
The control unit calculates the optimal sunvisor position in advance based on sensor data before executing the positioning action. This preliminary calculation allows the system to respond accurately to glare conditions while avoiding unnecessary movements by pre-determining the appropriate position.
3Adaptability or versatility
If manual adjustment is required for optimal positioning, then the adaptability to different driving conditions is improved, but the ease of operation and safety decrease
Solution Approach 1:
The sunvisor system performs self-adjustment through the integrated sensor and control unit that automatically detect glare conditions and reposition the sunvisor without driver intervention. The system serves itself by monitoring its own operational environment and making necessary adjustments autonomously.
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated electromechanical positioning system. The control unit electronically controls the sunvisor positioning mechanism based on sensor data, substituting the need for manual mechanical operation with an automated control system.
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 system provides immediate and accurate adjustments to block glare, ensuring occupant safety and comfort by minimizing false movements and reducing the need for manual intervention.
Implementation Method 1
the sun sensor comprising one to sixteen photosensors or light detectors being configured to measure the light incident angle and light intensity
Implementation Method 2
an acceleration sensor, comprising one to three accelerometers being configured to measure the vehicle movement in the three axis X,Y,Z
Data Source
AI summary
Antiglare device for vehicles comprising a retractable sunvisor, a sun sensor and a control unit; the retractable sunvisor comprising a sunvisor screen and a movement mechanism to provide a sliding and rotating movement; the sun sensor comprising one to sixteen photosensors is a unique part; the device also comprises an acceleration sensor comprising one to three accelerometers; the control unit being connected to the movement mechanism, the sun sensor and the acceleration sensor, taking into account all the measurements of the sun sensor and the acceleration sensor. Method of use of the antiglare device that measures the sun light incident angle and intensity, calculates in the control unit of an extent of sliding and/or rotation of the sunvisor screen; the measure step also includes to measure the vehicle movement by the acceleration sensor. The device and method provide an adaptation of the position of the sunvisor at all driving conditions.