Body-Mounted 180° Radar for Vehicle Door Protection and Gestures
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Solution Overview
Problem
Existing vehicle door protection systems require multiple radar sensors per door, increasing maintenance costs and integration complexity, while lacking efficient AI processing and gesture detection capabilities.
Innovation Solution
A vehicle door protection system utilizing two 180-degree mmWave radar sensors per side, positioned outside the doors, performs AI-based processing of radar point cloud data without domain controllers, enabling efficient gesture detection and reducing reliance on central processing units, using a simplified communication infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple radar sensors are integrated into each vehicle door, then door protection coverage is improved, but maintenance costs and device complexity increase
Solution Approach 1:
The system divides the vehicle's lateral sides into independent monitoring zones, with each zone covered by a single radar sensor positioned on the vehicle body rather than on individual doors. This segmentation allows one sensor to effectively monitor multiple doors on the same side, reducing the total number of sensors required while maintaining comprehensive coverage.
Solution Approach 2:
Each radar sensor is designed with a wide 180-degree field of view to serve multiple functions: monitoring multiple doors on the same lateral side, detecting obstacles in the door opening path, and enabling gesture recognition. This multi-functionality eliminates the need for separate sensors for each door, reducing both device complexity and maintenance costs.
2Reliability
If radar sensors are integrated into vehicle doors, then door-specific protection is improved, but integration complexity and maintenance costs increase
Solution Approach 1:
The radar sensors are extracted from the door structures and repositioned on the vehicle body (A-pillars or side panels). This extraction simplifies door assembly and manufacturing while maintaining door-specific protection capabilities through the sensors' wide monitoring coverage and AI-powered obstacle detection.
Solution Approach 2:
The system introduces an intermediary AI processing layer that receives data from the radar sensors and determines door protection actions. This intermediary layer enables door-specific protection logic to be implemented centrally rather than requiring integrated control in each door, simplifying manufacturing and integration.
3Productivity
If domain controllers and central processing units are used for radar data processing, then processing capability is improved, but system complexity and cost increase
Solution Approach 1:
The radar sensor modules are equipped with embedded AI processing capabilities that enable them to autonomously perform obstacle detection, classification, and gesture recognition. This self-service approach allows the sensors to process their own data locally, eliminating the need for complex centralized processing systems while maintaining high processing capability.
Solution Approach 2:
The system merges the sensing and processing functions into integrated radar modules, combining radar hardware with embedded AI processing in a single unit. This consolidation reduces system complexity by eliminating separate domain controllers and central processing requirements while maintaining advanced processing capabilities.
4Area of stationary object
If a wide 180-degree field of view radar sensor is used, then monitoring coverage is improved, but elevation angle coverage for door protection may be insufficient
Solution Approach 1:
The radar sensor's radiation pattern is optimized with enhanced sensitivity in the elevation angles relevant to door protection (typically lower angles near the horizontal plane). This local quality enhancement ensures that while the azimuth coverage is wide at 180 degrees, the elevation detection accuracy is specifically improved in the critical zones for door obstacle detection.
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 reduces maintenance costs, enhances gesture detection capabilities, and minimizes integration complexity by processing radar data efficiently, allowing for affordable and effective door protection with reduced dependence on vehicle central processing units.
Implementation Method 1
two mmWave radar sensor modules, each having a field of view of 180 degrees
Implementation Method 2
mmWave radar sensor modules...specific radiation diagram in the elevation plane
Data Source
Figure 1
Figure 2a~2c
Figure 3a~3b
AI summary
The proposed innovative vehicle door protection system uses one radar sensor per vehicle side for door protection purposes, not being mounted on the vehicle door. They have a 180-degree field of view, and a specific radiation diagram in the elevation plane, pointed in the elevation at an angle larger than 60 degrees. Said proposed system executes related radar processing of the radar point cloud data on the sensing module, without utilizing domain controllers or a central processing unit, while still performing AI processing. Also, said proposed system is advantageously used for radar-based gestures control, supporting hand movements, and/or leg movements.