Vehicle Bumper Curvature for Radar Detection
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Solution Overview
Problem
Radar devices installed obliquely on vehicles face performance decline due to non-perpendicular beam axes with respect to the bumper, leading to suboptimal detection performance, especially when the bumper direction cannot be altered for design reasons.
Innovation Solution
A radar apparatus with an inward bent surface on the vehicle's bumper, curving more sharply in the horizontal plane than the upper bumper surface, allows the radar device to be placed behind it, maintaining a smaller incident angle and reducing left-right deviation, thus preserving detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radar device is placed obliquely to detect objects in oblique directions, then the detection coverage is improved, but the incident angle of the radar wave on the bumper becomes large causing performance degradation
Solution Approach 1:
The bumper surface is designed with a specific curvature radius (R1) in the width direction to control the reflection characteristics of radar waves. This curved surface allows oblique radar waves to reflect at controlled angles, preventing excessive incident angles while maintaining oblique detection capability. The curvature radius is specifically set to ensure that radar waves reflecting from the curved surface maintain appropriate incident angles for reliable detection.
2Measurement precision
If the bumper direction is changed to match the oblique radar device, then the detection performance is improved, but the vehicle design is significantly affected
Solution Approach 1:
Only the local region where the radar device is installed is modified with a specific curved surface design, while the rest of the bumper maintains its original design. This localized modification allows the radar to achieve optimal performance without requiring changes to the overall bumper structure or vehicle design, thus minimizing impact on vehicle aesthetics and structural integrity.
3Ease of manufacture
If the radar device is placed behind a flat bumper surface, then the installation is simple, but the incident angle becomes large causing performance loss
Solution Approach 1:
The bumper surface is designed with a specific curvature radius (R1) in the width direction to control the reflection characteristics of radar waves. This curved surface allows oblique radar waves to reflect at controlled angles, preventing excessive incident angles while maintaining oblique detection capability. The curvature radius is specifically set to ensure that radar waves reflecting from the curved surface maintain appropriate incident angles for reliable detection.
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 maintains good detection performance for radar devices placed obliquely, preventing performance decline by minimizing the incident angle and deviation, ensuring effective obstacle detection even when the radar device is angled relative to the vehicle's frontal direction.
Implementation Method 1
the incident angel of the radar wave on the inward bent surface can be prevented from becoming excessively large
Data Source
AI summary
A radar apparatus mounted in a vehicle includes an inward bent surface and a radar device. The inward bent surface is formed in a lower portion of a bumper of the vehicle, and curves inward with a higher degree of curvature in a horizontal plane than a bumper surface of an upper portion of the inward bent surface. The radar device is placed behind the inward bent surface so that a beam axis of the radar device penetrates the inward bent surface.