Adaptive Radar Detection Region for Vehicle Interference Reduction
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Solution Overview
Problem
The use of actively measuring surroundings sensors in motor vehicles, such as radar and lidar sensors, can lead to mutual interference when operating in the same frequency band, resulting in ghost targets and reduced sensitivity, which is particularly problematic in complex traffic scenarios and can cause incorrect maneuvers or failure to recognize weakly reflecting targets, especially in automated vehicle systems.
Innovation Solution
Adapting the detection region of surroundings sensors based on traffic information, such as the position and movement of other road users, to minimize interference by adjusting the emission characteristic using digital beamforming and modifying transmission power, and utilizing motor vehicle-to-motor vehicle communication to share sensor data and adapt detection regions accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple radar sensors operate in the same frequency band to provide comprehensive surroundings detection, then detection coverage and sensor functionality are improved, but mutual interference occurs leading to ghost targets and reduced sensitivity
Solution Approach 1:
The patent applies local quality by making the detection region adaptable and sensor-specific. Each sensor's detection region is individually configured based on its position and orientation, allowing comprehensive coverage while minimizing overlap and interference in specific spatial locations. The control device assigns different detection regions to different sensors based on local traffic situations and sensor characteristics.
Solution Approach 2:
The patent implements dynamics by making the detection region adaptable rather than fixed. The control device continuously adjusts the detection regions of multiple sensors based on real-time traffic information, sensor positions, and detected objects. This dynamic adaptation allows the system to maintain optimal detection coverage while avoiding mutual interference as traffic conditions change.
2Area of stationary object
If the detection region is expanded to improve detection coverage, then more targets can be detected, but interference with other sensors increases
Solution Approach 1:
The patent applies local quality by assigning different detection regions to different sensors based on their specific positions, orientations, and functions. Each sensor monitors a tailored spatial zone, ensuring comprehensive overall coverage while minimizing overlapping detection regions that would cause interference. The control device optimizes each sensor's detection region locally rather than using a uniform approach.
Solution Approach 2:
The patent implements segmentation by dividing the overall detection space into multiple distinct detection regions, each assigned to a specific sensor. The control device segments the surveillance space based on sensor characteristics and traffic conditions, allowing each sensor to operate independently in its assigned region while contributing to comprehensive situational awareness.
3Length of moving object
If transmission power is increased to improve detection range, then detection capability is improved, but mutual interference and noise increase
Solution Approach 1:
The patent applies local quality by allowing different sensors to operate with different transmission power levels optimized for their specific detection requirements and spatial zones. Sensors detecting distant objects can use higher power, while sensors in regions with less critical detection needs use lower power, minimizing overall interference while maintaining necessary detection ranges.
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 approach increases the interference resistance of surroundings sensors by adaptively adjusting the detection region to avoid disturbing other sensors, reducing mutual interference and ensuring accurate detection of relevant targets while minimizing noise and ghost targets, thereby enhancing the reliability of vehicle systems.
Implementation Method 1
the surroundings sensor measures in an adaptable detection region by emitting a transmission signal and receiving a reception signal resulting due to reflection of the transmission signal
Implementation Method 2
adapting the emission characteristic of the at least one surroundings sensor, in particular by digital beamforming
Data Source
AI summary
A method for operating at least one distance-measuring surroundings sensor, in particular a radar sensor and/or a lidar sensor, of a motor vehicle. The surroundings sensor measures in an adaptable detection region by emitting a transmission signal and receiving a reception signal resulting due to reflection of the transmission signal. The detection region is adapted in dependence on an item of traffic information describing at least one further road user, in particular a further motor vehicle, in relation to the ego motor vehicle to reduce interference between the surroundings sensor of the motor vehicle and at least one surroundings sensor of the further road user.