Radar Wave Transmission Component for Vehicle Cladding
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Solution Overview
Problem
The attenuation of radar waves by external cladding components in vehicles, particularly due to design constraints and material properties, affects the detection range and resolution accuracy of radar sensors, especially for short-range sensors with larger opening angles, leading to varying attenuation across different angles of incidence.
Innovation Solution
A device with a wall section designed to maintain a constant traveling distance for radar waves regardless of the angle of incidence, comprising a mounting section and a wall section shaped to ensure uniform attenuation within a cone-shaped area, and optionally incorporating an absorption layer to prevent interfering signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the external cladding component is made of plastics (particularly thermoplastics) to achieve design requirements and invisibility, then the aesthetic appearance and integration are improved, but the radar wave transmission performance deteriorates due to attenuation
Solution Approach 1:
A transmission component is introduced as an intermediary element between the radar sensor and the external cladding component. This transmission component is specifically designed to be transparent to radar waves while being integrated into the cladding structure, allowing the cladding to maintain its aesthetic plastic construction without compromising radar wave transmission. The transmission component acts as a mediator that separates the aesthetic function (cladding) from the functional requirement (radar transmission).
Solution Approach 2:
The transmission component is positioned locally at the specific region where the radar sensor is located, rather than requiring the entire cladding component to be radar-transparent. This allows different parts of the cladding to have different properties: the region with the transmission component maintains high radar wave transmission, while other regions can be made of opaque plastics for aesthetic purposes.
2Strength
If the wall thickness of the external cladding component is increased to improve structural strength and aesthetics, then the mechanical strength is improved, but the radar wave transmission performance deteriorates due to increased attenuation
Solution Approach 1:
The transmission component with optimized (reduced) wall thickness is applied locally only at the radar sensor region, while other parts of the cladding can maintain their required structural thickness for strength and aesthetics. This localized approach allows the radar transmission area to have minimal thickness for optimal wave transmission, while the overall structure maintains necessary strength.
Solution Approach 2:
The transmission component serves as a specialized intermediary layer that handles the radar wave transmission function, allowing the main cladding structure to focus on providing structural strength and aesthetics without compromise. The intermediary component absorbs the functional requirement, enabling independent optimization of both strength and transmission properties in different parts of the assembly.
3Area of stationary object
If the opening angle of short-range radar sensors is increased to improve blind spot detection coverage, then the detection coverage is improved, but the attenuation variation across different angles of incidence increases
Solution Approach 1:
The transmission component is designed with specifically optimized geometric parameters (curvature, thickness profile, surface shape) that compensate for the varying angles of incidence across the wide opening angle of short-range radar sensors. By adjusting these parameters, the component ensures that radar waves traveling at different angles experience uniform attenuation, maintaining consistent transmission performance across the entire detection cone.
Solution Approach 2:
The transmission component incorporates curved or spherical surface geometries that help equalize the path length and attenuation experienced by radar waves across different angles of incidence. The curvature is specifically designed to compensate for the angular variation, ensuring that waves entering at different angles traverse equivalent effective thicknesses of the component, thereby achieving uniform attenuation characteristics.
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
This solution improves the performance of radar sensors by maintaining consistent attenuation across different angles of incidence, enhancing detection accuracy and reducing interfering signals, thus improving the overall transmission behavior of radar waves through the external cladding component.
Implementation Method 1
radar waves that are emitted by the radar sensor when fastened to the mounting section impinge on the first surface by an angle of incidence, enter the wall section and leave the wall section via the second surface
Implementation Method 2
the electromagnetic waves emitted by the respective sources have to penetrate the external cladding component of the vehicle to reach the exterior of the vehicle... which attenuate the electromagnetic waves to a certain degree
Implementation Method 3
optionally incorporating an absorption layer to prevent interfering signals
Data Source
AI summary
The present disclosure is drawn to a device for improving the transmission behavior of radar waves, comprising a mounting section to which a radar sensor can be fastened, and a wall section having a first surface and a second surface, wherein radar waves that are emitted by the radar sensor, when fastened to the mounting section, impinge on the first surface by an angle of incidence α, β, γ, δ, enter the wall section, and leave the wall section via the second surface. The radar waves travel a traveling distance (d) between the first surface and the second surface, the first surface and the second surface being shaped such that the traveling distance (d) of the radar waves stays constant for every angle of incidence α, β, γ, δ.