Vehicle Radar Radome Heating Layout for Off-Center Ice Buildup
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Solution Overview
Problem
Existing radome heating systems for radar sensors in vehicles fail to efficiently address precipitation accumulation, particularly in off-center installations, leading to impaired radar performance in cold weather conditions.
Innovation Solution
A radome device with a heating element featuring a first and second electric heating circuit, and an inhomogeneous heating-conductor density or cross-sectional distribution, allowing targeted heat output in a preferred accumulation region to efficiently remove precipitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating elements are distributed evenly within the radome, then the temperature distribution is uniform, but precipitation accumulation in specific regions cannot be effectively addressed
Solution Approach 1:
The heating element density is made non-uniform, with higher density in the preferred accumulation region and lower density in other regions. This local variation in heating capacity matches the local precipitation accumulation patterns, providing effective heating where needed while reducing unnecessary heating in other areas.
Solution Approach 2:
The radome heating system is segmented into regions with different heating requirements. The heating element is divided into sections with different densities, allowing independent optimization of heating in the preferred accumulation region versus other regions of the radome.
2Reliability
If heating output is increased to remove precipitation accumulation, then precipitation removal effectiveness improves, but energy consumption increases
Solution Approach 1:
Heating power is concentrated in the preferred accumulation region where precipitation removal is most needed, rather than uniformly distributing power across the entire radome. This localizes energy expenditure to the most critical area, improving precipitation removal effectiveness while minimizing overall energy consumption.
Solution Approach 2:
The heating element provides enhanced (excessive) heating capacity specifically in the preferred accumulation region, while other regions receive reduced or no heating. This partial application of excessive heating power addresses the critical precipitation accumulation problem without the energy cost of heating the entire radome uniformly.
3Reliability
If heating elements are distributed symmetrically in the radome, then manufacturing is simplified, but off-center precipitation accumulation cannot be addressed
Solution Approach 1:
The heating element distribution is made asymmetric, with higher density in the preferred accumulation region which is typically off-center. This asymmetric layout matches the asymmetric precipitation accumulation pattern caused by vehicle geometry and airflow, enabling effective control of precipitation in the critical region while accepting a more complex manufacturing layout.
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
Effectively prevents precipitation accumulation on the radome by optimizing heat distribution, ensuring efficient radar performance without unnecessary energy consumption.
Implementation Method 1
a heating element for controlling the temperature of the central region of the radome, by means of which an overall heat output that is different from the heat output can be introduced in the preferred accumulation region of the central region by electrical energy
Data Source
AI summary
A radome device for a radar sensor of a vehicle has a radome with a central region which is permeable to electromagnetic radiation from the radar sensor. The radome device includes a heating element for controlling the temperature of a central region of the radome, wherein a heat output can be introduced into the central region of the radome by way of electrical energy. The central region has a preferred accumulation region, within which precipitation from the surroundings of the vehicle preferably accumulates when the radome device is arranged on the vehicle as intended. An overall heat output that is different from the heat output can be introduced into the preferred accumulation region.