Vehicle Front Bracket Structure for Radar Stability
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Solution Overview
Problem
Long radar bracket pipes in vehicle front-rear direction can transmit torsional and vibration forces, affecting the operation of object detection devices, especially when the distance from the vehicle body member to the device is large.
Innovation Solution
A vehicle body front structure with a pair of bracket members that are spaced apart in the vehicle width direction, featuring a forwardly extending portion and a downwardly extending portion to support the object detection device, and a bracket member locking member that couples these portions and attaches to the vehicle's exterior member, reducing torsional forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radar bracket pipes are made long to accommodate vehicles with large distance from bulkhead to radar position, then the adaptability to different vehicle designs is improved, but the torsional force and vibration force transmitted to the radar device increases
Solution Approach 1:
The bracket member is divided into multiple sections: a first bracket section connected to the bulkhead, a second bracket section extending forward, and a third bracket section extending downward to hold the radar. This segmentation allows each section to be optimized independently - the first section provides stable mounting, while the second and third sections together achieve the required reach without transmitting excessive torsional forces.
Solution Approach 2:
Instead of extending the bracket purely in the front-rear direction (one dimension), the invention uses a multi-dimensional approach with the second bracket section extending forward and the third bracket section extending downward. This dimensional change allows the radar to be positioned at the required distance while reducing the lever arm for torsional forces.
2Reliability
If the distance from the vehicle body member to the object detection device is increased, then the radar can be positioned optimally for detection, but the stability of the device decreases due to increased torsional force transmission
Solution Approach 1:
The bracket structure provides different local qualities at different sections: the first bracket section provides rigid support for stable mounting to the bulkhead, while the second and third sections provide the necessary reach with reduced torsional coupling. This local differentiation allows the radar to be positioned for optimal detection while maintaining stability.
3Measurement precision
If the radar bracket pipes are made long to reach the optimal radar position, then the detection performance is improved, but the vibration force from the vehicle body increases
Solution Approach 1:
By segmenting the bracket into multiple sections with different orientations, the structure reduces the direct transmission path for vibrations from the vehicle body to the radar device, thereby improving detection precision while minimizing vibration exposure.
Data Source
AI summary
A vehicle body front structure has: an object detection device disposed in a vehicle front end section of a vehicle to detect an object ahead of the vehicle; and a pair of bracket members which are spaced apart from each other in a vehicle width direction and which support the object detection device. Each of the pair of bracket members includes: a forwardly extending portion that extends forward from a vehicle body member; and a downwardly extending portion that extends downward from the forwardly extending portion and supports the object detection device. The vehicle body front structure further has a bracket member locking member which couples the forwardly extending portions to each other in the vehicle width direction and to which an exterior member of the vehicle is attached.