Electromagnetic Wave Transmissive Cover Seal Member
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Solution Overview
Problem
Existing sensor modules face detection performance degradation due to water and debris entering through gaps between the sensor device and the electromagnetic wave transmissive cover, which absorb electromagnetic waves and reduce the accuracy of object recognition and distance/velocity detection.
Innovation Solution
An electromagnetic wave transmissive cover with a seal member, comprising an attachment base and an annular hollow seal, is designed to be attached to the vehicle, sealing the gap between the sensor device and the cover body, preventing water and debris from reaching the transmissive portion and ensuring continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sensor device and the electromagnetic wave transmissive cover are separately attached to the vehicle, then the installation flexibility is improved, but water and debris enter through the gap between the sensor device and the cover body, reducing detection performance
Solution Approach 1:
A seal member is introduced as an intermediary component between the sensor device and the electromagnetic wave transmissive cover. The seal member includes a seal portion that contacts both components to fill the gap, preventing water and debris from entering while maintaining the separate attachment structure for installation flexibility.
Solution Approach 2:
The seal member uses a flexible seal portion that can deform to accommodate the gap between the sensor device and cover body. This flexible sealing structure adapts to the interface geometry while maintaining effective sealing against water and debris infiltration.
2Quantity of substance
If water and debris collect on the electromagnetic wave transmissive portion, then the electromagnetic wave transmission is improved, but the detection performance is reduced due to absorption of electromagnetic waves
Solution Approach 1:
The seal member acts as a protective intermediary that prevents water and debris from reaching the electromagnetic wave transmissive portion. By sealing the gap, it ensures clean contact between the transmissive portion and the external environment, maintaining optimal electromagnetic wave transmission and detection precision.
Data Source
AI summary
An electromagnetic wave transmissive cover is configured to be employed in a vehicle to which a sensor device is attached. The electromagnetic wave transmissive cover includes a cover body that is attached to the vehicle and covers the sensor device from a front side in an emission direction of the electromagnetic waves, and a seal member that provides a seal between the sensor device and the cover body. The seal member includes an attachment base portion that is attached to the cover body while surrounding the electromagnetic wave transmissive portion, and an annular hollow seal portion that is coupled to the attachment base portion and is in contact with the sensor device while surrounding the electromagnetic wave transmissive portion.