Radar Bumper Mounting Structure for Pedestrian Impact Absorption
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Solution Overview
Problem
The rigid mounting of radar units near the front bumper increases the impact on pedestrians in the event of a collision, as existing designs do not provide adequate protection or absorption of impact forces.
Innovation Solution
A bumper structure with pre-assembled moldings and a bracket system that securely fastens the radar unit to the bumper using a combination of hooks and fasteners, ensuring robust attachment and alignment with the bumper's outer surface, while allowing for impact absorption through strategically formed openings and cutting lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar unit is rigidly fixed to the vehicle body to improve object detection accuracy, then measurement precision is improved, but the impact on pedestrians increases in the event of collision
Solution Approach 1:
The bumper structure is segmented into multiple components: a bracket for mounting the radar unit, first and second moldings that surround the radar unit, and the radar unit itself. This segmentation allows the radar unit to be securely mounted for accurate detection while the bumper structure can deform independently to reduce impact on pedestrians.
Solution Approach 2:
The bracket is provided with multiple fastening holes at different positions, and the moldings have hooks that engage with these holes. This local variation in fastening positions allows for optimized mounting that balances detection accuracy with impact reduction, as the radar unit can be positioned and secured with appropriate rigidity while the surrounding bumper structure maintains energy-absorbing characteristics.
2Measurement precision
If the radar unit is disposed near the front bumper to make it easier to detect obstacles, then measurement precision is improved, but the impact on pedestrians increases in the event of collision
Solution Approach 1:
The bracket and molding structure serve as intermediaries between the radar unit and the front bumper. The bracket provides secure mounting for the radar unit near the bumper for good detection coverage, while the moldings that surround the radar unit act as protective intermediaries that can deform during impact, reducing the direct transmission of impact forces to the radar unit and thereby reducing harm to pedestrians.
3Reliability
If a bracket system with multiple fastening holes and hooks is used to securely fasten the radar unit, then reliability is improved, but device complexity increases
Solution Approach 1:
The bracket and moldings are designed to work together as an integrated mounting system. The bracket with multiple fastening holes and the moldings with hooks are combined to provide reliable fastening of the radar unit. This merging of components achieves high reliability through multiple engagement points while avoiding the complexity of separate, independent fastening mechanisms for each component.
Data Source
AI summary
An embodiment bumper structure includes a bracket configured to be fastened to an inner side of a bumper, a radar unit configured to be located in an opening in the bumper and fastened to the bracket, a first molding configured to surround an outer circumference of the radar unit, and a second molding configured to be assembled to the first molding and fastened to the bracket through the first molding and the radar unit.