Vehicle Sensor Protector with Separable Electromagnetic Wave Shield
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Solution Overview
Problem
Existing sensor protector designs for vehicles face issues with incorrect object detection due to reflected waves and lack of versatility across different vehicle sizes, as well as inadequate protection during collisions.
Innovation Solution
A sensor protector comprising a mount, a plate-shaped cover, and an electromagnetic wave shield that extends from the mount to cover the lower portion of the sensor, preventing reflected waves from reaching the sensor and allowing for separation from the bumper cover to absorb collision loads, while being adaptable to various vehicle sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the housing box is provided in close contact with the back face of the rear bumper, then the reflected waves are reflected by the shield plate and prevented from reaching the object, but there is a chance of load being transmitted to the housing box or the radar device if collision load is input to the rear bumper
Solution Approach 1:
The sensor protector is divided into a mounting portion (attached to the bracket) and a cover portion (extending toward the bumper cover). This segmentation allows the mounting portion to remain fixed for maintaining detection accuracy while the cover portion can independently absorb collision loads through deformation or detachment.
Solution Approach 2:
The sensor protector acts as an intermediary element between the sensor and the bumper cover. It provides electromagnetic wave shielding to prevent incorrect detection while simultaneously serving as a protective intermediary that absorbs collision loads before they reach the sensor, through its separable design.
2Measurement precision
If the housing box is in contact with the back face of the rear bumper, then the reflected waves are blocked, but if the placement of the radar device and the rear bumper vary depending on vehicle size, it is not possible to employ a common housing box
Solution Approach 1:
The sensor protector is designed with a standardized mounting interface that can be universally attached to the bracket regardless of vehicle size variations. The cover portion's extended design provides sufficient shielding distance for different bumper placements, enabling a single design to serve multiple vehicle models.
Solution Approach 2:
Instead of varying the horizontal positioning of the housing box to adapt to different bumper placements, the invention extends the cover portion in the depth direction (toward the bumper cover). This dimensional change allows the same mounting position to provide effective shielding for various vehicle sizes and bumper configurations.
3Measurement precision
If the cover extends close to the bumper cover, then the electromagnetic wave shield is effective, but the load transmission risk increases
Solution Approach 1:
The cover portion is designed to be dynamically separable from the bumper cover area. During normal operation, it extends close to the bumper for effective shielding. During collision, it can deform or detach to avoid transmitting load to the sensor, providing adaptive protection based on operational conditions.
Solution Approach 2:
The sensor protector is pre-positioned between the sensor and the bumper cover to provide beforehand cushioning. The cover portion extends toward the bumper cover to intercept electromagnetic waves while being positioned to absorb or redirect collision loads before they reach the sensor, protecting it in advance of actual collision events.
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
The solution effectively prevents incorrect object detection and enhances sensor protection during collisions, ensuring accurate sensor operation and increased versatility across multiple vehicle models.
Implementation Method 1
when some of the electromagnetic waves emitted from the sensor are reflected by a back face of the bumper cover, reflected waves reaching the cover are further reflected by the electromagnetic wave shield
Data Source
AI summary
A sensor protector configured including a mount, a plate shaped cover, and an electromagnetic wave shield is provided. The mount is mounted at a bracket configured to fix a sensor, provided at an inner side of a bumper cover, to a body of a vehicle. The plate shaped cover that extends from a lower portion of the mount toward the bumper cover with an end portion of the cover, at an outer side in a vehicle front-rear direction, separated from the bumper cover, and covers a lower portion of the sensor as viewed from a lower side of the vehicle. The electromagnetic wave shield is provided to at least a portion of the cover.