Vehicle Headrest Face Direction Measurement Using Distance Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current headrest adjusting systems in vehicles lack the ability to accurately measure and respond to the driver's face direction, leading to unnecessary alarms and ineffective adjustments.
Innovation Solution
A system comprising a sensor network using infrared or laser distance measuring sensors on a headrest to determine the driver's face direction by calculating and comparing average and current distances, allowing for precise adjustment and notification based on the driver's gaze direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional headrest adjusting systems use simple distance detection, then the system complexity is low, but the measurement precision of driver face direction is insufficient
Solution Approach 1:
The headrest is divided into multiple sensor zones (upper left, upper right, lower left, lower right) with distance sensors positioned at each segment. This segmentation allows the system to detect face direction by comparing distances from different regions, achieving precise directional measurement without requiring a single complex sensor
Solution Approach 2:
The system transitions from simple one-dimensional distance detection to two-dimensional directional measurement by positioning sensors at multiple locations on the headrest. By comparing distance variations across different spatial positions, the system determines face direction (upward, downward, leftward, rightward) with high precision
2Measurement precision
If the system uses multiple distance sensors to accurately measure face direction, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The distance sensors serve multiple functions: they detect both the presence of the driver and the direction of the driver's face. By analyzing distance variations from different sensor positions, the system simultaneously achieves occupancy detection and directional measurement, reducing the need for separate sensor systems
Solution Approach 2:
The controller continuously compares current distance measurements with previously stored distance data to determine face direction. This feedback mechanism allows the system to dynamically adjust headrest position based on real-time facial direction detection, improving measurement accuracy through iterative comparison
3Reliability
If the headrest adjusting system lacks face direction measurement capability, then the device complexity is low, but the reliability of adjustment accuracy deteriorates
Solution Approach 1:
The system stores distance information measured when the driver's face is in a neutral position as reference data before adjustment begins. This preliminary action establishes a baseline for comparison, enabling the controller to accurately determine face direction during actual adjustment operations by comparing current measurements against the stored reference
Solution Approach 2:
The system replaces complex mechanical direction detection mechanisms with optical distance sensors and computational analysis. By using infrared or laser distance measurement combined with algorithmic comparison of distance data, the system achieves reliable face direction detection without mechanical moving parts or complex mechanical structures
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 effectively measures and responds to the driver's face direction, reducing unnecessary alarms and ensuring accurate adjustments, thereby enhancing safety and comfort.
Implementation Method 1
a plurality of distance measuring sensors that use infrared rays or laser
Implementation Method 2
a plurality of distance measuring sensors that use infrared rays or laser
Data Source
AI summary
A system for measuring a direction of the face of a driver in a vehicle includes a sensor system for measuring a distance between a headrest in the vehicle and the face of the driver, and a controller communicatively connected to the sensor system and configured to collect the measured distance for a predetermined period of time, calculate an average distance between the headrest and the face of the driver by using the collected distance, and compare the calculated average distance and a current distance between the headrest and the face of the driver to determine the direction of the face of the driver in the vehicle.