Road Surface Detector Layout for Pitch-Stable Wheel Sensing
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Solution Overview
Problem
Conventional road surface condition detection systems experience errors due to pitching motion, leading to changes in the distance between detection points and wheels, which affect controllability and require complex calculations for correction.
Innovation Solution
The road surface condition detector is positioned in front of each wheel, with laser beams radiated in a direction tangent to an arc about the vehicle's pitch center, minimizing displacement and maintaining consistent distance during pitching motions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a sensor is mounted at above a front window to detect road surface conditions, then the detection range is extended, but the distance between detection points and wheels changes significantly during pitching motion causing detection errors
Solution Approach 1:
The patent changes the mounting position of the road surface condition detector from above the front window to in front of the front wheels, effectively moving the detection system to a different spatial dimension closer to the wheels. This dimensional change reduces the impact of pitching motion on the distance between detection points and wheels, thereby improving measurement accuracy while maintaining adequate detection range.
2Length of moving object
If a sensor is mounted at a bumper to detect road surface conditions, then the distance to wheels is reduced, but detection errors still occur during pitching motion
Solution Approach 1:
The patent applies local quality by positioning the road surface condition detector specifically in front of each front wheel rather than at a general bumper location. This localized positioning ensures that the detection points remain consistently aligned with the wheels during pitching motion, reducing detection errors and improving measurement precision for the specific critical area near the wheels.
3Measurement precision
If the detector is positioned in front of wheels with laser beams radiated tangent to an arc about the pitch center, then measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent employs spheroidality by radiating laser beams in a direction tangent to an arc about the pitch center of the vehicle. This curved geometric approach ensures that the detection points maintain a consistent radial relationship with the pitch center during pitching motion, automatically compensating for distance changes without requiring complex active adjustment mechanisms, thus balancing measurement precision with device simplicity.
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 configuration reduces errors in distance changes between detection points and wheels, enhancing controllability and simplifying calculations, thereby improving the accuracy of road surface condition detection.
Implementation Method 1
a direction of radiating laser beams by the road surface condition detector
Implementation Method 2
detecting a detection point on a road surface
Data Source
AI summary
A vehicle includes: a vehicle body; front and rear wheels configured to move the vehicle body; and a road surface condition detector configured to detect road surface conditions in front of each of the front wheels, wherein the road surface condition detector is positioned in front of each of the front wheels, and a direction of radiating laser beams by the road surface condition detector for detecting a detection point on a road surface is inclined in a direction of a tangent to an arc, about a pitch center of the vehicle body and running through the detection point, at the detection point, when the vehicle body is viewed laterally.