Soft Target Test Vehicle Layout for Urban ADAS Radar Testing
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Solution Overview
Problem
Current test vehicles for advanced crash avoidance systems have a large profile and high radar cross section, making them unsuitable for urban environments and scenarios requiring multiple pedestrian targets, as they interfere with the radar sensors of vehicles being tested and are not designed to simulate busy intersections effectively.
Innovation Solution
The development of an overrunable test vehicle with a low profile and minimal radar cross section, featuring a chassis with a control section and a carrier section of different heights, equipped with a drive mechanism, caster members, and a control system, allowing for the simulation of multiple pedestrian targets moving in different directions and speeds, and capable of withstanding significant weights and impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large test vehicle is used to carry soft targets, then the structural strength and stability are improved, but the radar cross section increases and interferes with ADAS sensors
Solution Approach 1:
The test vehicle is divided into a chassis structure and separate soft target mounts. The chassis provides structural strength while the soft targets are mounted separately on the chassis, allowing the radar interference from the chassis to be minimized while maintaining structural integrity.
Solution Approach 2:
Different parts of the test vehicle have different properties: the chassis is designed with minimal radar cross section for urban environments, while the soft target mounts are positioned and shaped to carry targets without adding significant radar interference. The carrier section has a different profile height than the control section to optimize radar characteristics.
2Stability of the object's composition
If a large profile test vehicle is used, then the stability and load capacity are improved, but the suitability for urban environments and multiple pedestrian simulation decreases
Solution Approach 1:
The test vehicle uses a low profile design with the carrier section having a different profile height than the control section, allowing it to navigate urban environments while maintaining stability. The vehicle can simulate multiple pedestrian targets by positioning multiple soft targets on the carrier section.
Solution Approach 2:
The test vehicle transitions from a traditional large profile design to a low profile design, changing the vertical dimension characteristics. This allows the vehicle to fit within urban environments while maintaining structural stability through optimized chassis design.
3Object-affected harmful factors
If a small platform test vehicle is used, then the radar cross section is minimized and urban environment suitability is improved, but the load capacity and impact resistance may be reduced
Solution Approach 1:
The test vehicle has an asymmetric design where the control section and carrier section have different profile heights. The carrier section is optimized for minimal radar cross section while the chassis structure provides sufficient strength and impact resistance for the intended applications.
Data Source
AI summary
The teaching generally provide for an overrunable test vehicle for dynamic vehicle testing of advanced driver assistant systems. The overrunable test vehicle comprising a chassis with a control section defining a cavity, the control section having a profile height, and a carrier section having a profile height different than the control section profile height, the carrier section including a mounting area configured to receive a soft target. The overrunable test vehicle including a caster member supported by the chassis in the carrier section, a drive mechanism located in the control section having an electric motor and a drive wheel. The overrunable test vehicle also including a control system disposed within the cavity of the control section and coupled with the at least one electric motor for sending and receiving information.