Sensor Bracket Attachment Structure with Dual Absorption Mechanisms
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Solution Overview
Problem
Existing sensor attachment structures on vehicles face challenges in maintaining attachment accuracy due to aging, which is influenced by the weight received by exterior members, leading to potential damage from external loads.
Innovation Solution
A sensor attachment structure featuring a first absorption mechanism that allows the sensor bracket to retreat and a second absorption mechanism that enables the sensor bracket to swing in response to external loads, both mechanisms being designed to absorb and distribute the impact without affecting attachment accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sensor is attached to the exterior member to extend the detection range, then the detection range is extended, but the sensor is exposed to external loads that can cause damage and attachment accuracy degradation due to aging
Solution Approach 1:
The attachment structure is divided into two independent parts: the exterior member (bumper) that absorbs external loads, and the sensor bracket that maintains sensor position. The exterior member and sensor bracket are connected through a mounting structure that allows relative movement, separating the load-bearing function from the precision positioning function.
Solution Approach 2:
The mounting structure acts as an intermediary between the exterior member and the sensor bracket. It includes mounting holes with clearance and positioning ribs that allow the sensor bracket to move independently from the exterior member, absorbing shocks without transmitting them to the sensor.
2Manufacturing precision
If the sensor bracket is fixed rigidly to maintain attachment accuracy, then the attachment accuracy is maintained, but the sensor is vulnerable to damage from external loads
Solution Approach 1:
The mounting structure transitions from a rigid fixed connection to a dynamic connection that allows controlled movement. The sensor bracket can move relative to the exterior member within the mounting holes, and the positioning ribs provide guidance while allowing absorption of external loads through elastic deformation and relative movement.
3Reliability
If the sensor bracket is made movable to absorb loads, then the sensor is protected from external loads, but the attachment accuracy may change due to aging and movement
Solution Approach 1:
Different parts of the mounting structure have different properties: the mounting holes provide clearance for movement in certain directions while maintaining position in others, and the positioning ribs provide localized guidance and support. This allows the structure to be flexible where needed while maintaining precision where required.
Data Source
AI summary
A sensor attachment structure in which a sensor bracket that holds a sensor configured to detect an external world of a moving body is attached to an exterior member of the moving body and a structure member of the moving body, comprises: a first absorption mechanism configured to hold the sensor bracket such that the sensor bracket can retreat from an initial position of the sensor bracket in a state in which an external load does not act along a front-and-rear direction of the moving body in response to action of the external load; and a second absorption mechanism configured to hold the sensor bracket such that the sensor bracket can swing from the initial position in response to the action of the external load, while being held by the first absorption mechanism.