Radar Sensor Housing Shielding Interference Waves
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Solution Overview
Problem
Radar sensor devices in motor vehicles face interference from electromagnetic waves reflected by metallic and dielectric vehicle parts, leading to disruptive signal superimposition and inaccurate measurements due to multiple reflections, which existing solutions attempt to mitigate with additional shielding devices.
Innovation Solution
The radar sensor device integrates a one-piece housing that serves as both a shielding device, deflecting and absorbing interference waves, thereby reducing the need for separate shielding components and enhancing signal clarity within the predetermined field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If additional separate shielding devices are used to block interference waves, then shielding effectiveness is improved, but device complexity and assembly cost increase
Solution Approach 1:
The housing is designed to perform both the function of enclosing the radar sensor and the function of shielding against interference waves. The housing includes a first housing area for accommodating the radar sensor and a second housing area forming the shielding device, merging two separate components into one integrated structure.
Solution Approach 2:
The housing serves multiple functions simultaneously: it provides mechanical protection for the radar sensor, defines the structural mounting interface on the vehicle bumper, and acts as an electromagnetic shielding device to block interference waves from reaching the sensor.
2Object-affected harmful factors
If multiple separate shielding components are assembled, then shielding coverage is improved, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The shielding device is integrated as an inherent part of the housing structure rather than being a separate assembly component. The housing is designed in one piece with the shielding device forming at least part of it, eliminating the need for separate assembly steps.
Solution Approach 2:
The housing structure simultaneously provides mechanical enclosure, mounting integration with the vehicle bumper, and electromagnetic shielding functionality, reducing the total number of parts and simplifying both manufacturing and assembly processes.
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 configuration effectively shields the radar sensor from interference waves, preventing ripple formation in differential phase signals and allowing for more reliable distance and angle determination between the vehicle and objects, thus improving measurement accuracy with reduced assembly complexity and cost.
Implementation Method 1
A remedy against the interference waves is, for example, the use of an electromagnetic wave absorbing material
Implementation Method 2
the shielding device is positioned in relation to the radar sensor in such a way that it deflects the interference waves that hit the shielding device away from the radar sensor
Data Source
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AI summary
The invention relates to a radar sensor device (2) for a motor vehicle (1) for detecting an object (7) in an area (6) surrounding the motor vehicle (1). With a radar sensor (8) which is designed to emit an electromagnetic wave and to receive the electromagnetic wave reflected by the object (7) in a predetermined visual range (9) of the radar sensor (8) in order to detect the object (7). And with a housing (11) in which the radar sensor (8) is arranged at least in certain areas and with a shielding device (12) which is designed to shield interfering waves, which are formed by the reflected electromagnetic waves outside the predetermined visual range (9), from the radar sensor (8), wherein the housing (11) has a single-part design and the shielding device (12) forms at least one part of the housing (11). The invention also relates to a driver assistance system and a motor vehicle (1).