Vehicle Ultrasonic Sensor Mounting for Flush Bumper Alignment
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Solution Overview
Problem
Ultrasonic wave devices attached to vehicles face issues with the depth of insertion of the head into an exposing hole being affected by the curvature of the mounting surface, leading to a non-flush appearance due to deformation of the holding ring and changes in the depth of insertion.
Innovation Solution
An ultrasonic wave device design featuring a holding member fixed to the vehicle's outer panel with a body block that includes abutting parts closer to the exposing hole than the holding member's fixed position, and a biasing part to maintain the depth of insertion, ensuring the exposed surface remains flush regardless of the mounting surface's curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the holding member is fixed to the inner surface of the bumper by gluing or welding, then the ultrasonic wave device can be securely mounted, but the depth of insertion of the head into the exposing hole changes when the bumper surface is curved, causing the exposed surface to become non-flush with the outer surface
Solution Approach 1:
The holding member is divided into multiple functional parts: a fixing part that attaches to the bumper inner surface, and a holding part that secures the body block. This segmentation allows each part to perform its specific function independently, with the holding part compensating for surface curvature variations while the fixing part ensures secure mounting.
Solution Approach 2:
The holding ring acts as an intermediary element between the body block and the bumper. It is inserted into the exposing hole and abuts against the bumper inner surface, mediating the connection and ensuring that the head is held at the correct depth regardless of surface curvature, thus maintaining flush alignment with the outer surface.
2Adaptability or versatility
If the periphery of the exposing hole is curved in the bumper, then the mounting surface adapts to the bumper shape, but the holding ring becomes deformed and the depth of insertion of the head changes, affecting appearance
Solution Approach 1:
The holding ring is designed with specific local properties: it has a circular cross-section with a diameter slightly smaller than the exposing hole, allowing it to be inserted easily, and it includes an abutting surface that contacts the bumper inner surface. This local quality design enables the holding ring to maintain the head's position and shape regardless of the overall curvature of the bumper surface.
Solution Approach 2:
The holding ring is pre-formed with a specific geometry that anticipates the need for depth compensation. Its circular cross-section and slightly smaller diameter than the exposing hole allow it to be inserted beforehand, establishing a stable reference point that maintains flush alignment even when the bumper surface has varying curvature.
3Adaptability or versatility
If the holding ring is made deformable to fit curved surfaces, then the device can be mounted on various bumper shapes, but the depth of insertion becomes unstable and the exposed surface does not remain flush
Solution Approach 1:
The holding member is segmented into a fixing part for attachment and a holding part with a holding ring for position stabilization. This segmentation allows the holding ring to provide stable depth control through its rigid circular structure, while the fixing part adapts to curved surfaces through the mounting method (gluing or welding), thus maintaining both stability and adaptability.
Data Source
AI summary
An ultrasonic wave device includes a holding member designed to be fixed to an inner surface of a bumper as a vehicle outer panel, and a body block designed to be connected with the holding member. The body block includes a head designed to be inserted in an exposing hole provided at the bumper, and at least one abutting part designed to abut on the inner surface of the bumper at a position closer to the exposing hole than a position where the holding member is fixed. The body block is biased to an outer side of the bumper by a spring force of the clamping part, which is a biasing part provided with the holding member.