Vehicle Radar Marking for Lane Detection in Adverse Weather
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Solution Overview
Problem
Current vehicle sensor systems, particularly radar systems, struggle with visibility in inclement weather conditions such as heavy rain and snow, and are ineffective in providing accurate lane guidance and object detection, limiting their ability to support level 4 and 5 autonomous vehicle implementation.
Innovation Solution
An advanced driver-assistance and autonomous vehicle control radar system that employs microwave and radio frequency technology using radar reflective materials in road markings and signs, allowing for enhanced visibility and data transmission through radar waves, enabling reliable environmental sensing and vehicle control even in adverse weather conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional radar systems are used to detect environmental objects and road markings, then the system can provide basic collision avoidance and lane detection capabilities, but the system fails to provide reliable detection in inclement weather conditions such as heavy rain, snow, and fog
Solution Approach 1:
The patent applies radar-reflective materials to road markings and environmental objects that specifically reflect radar waves back to the sensor. These materials effectively change the 'radar signature' or reflectivity characteristics of the road surface and objects, enabling reliable detection of lane markings, road edges, and obstacles even in inclement weather conditions where conventional radar systems fail.
Solution Approach 2:
The patent employs composite materials comprising radar-reflective particles or structures integrated into road marking paints and coatings. These composite materials combine the visual properties needed for driver visibility with enhanced radar reflectivity, allowing the road markings to be detected reliably by radar sensors through fog, rain, and snow.
2Reliability
If radar reflective materials are applied to road markings and signs, then weather-independent detection capability is achieved, but the manufacturing and application complexity of the marking system increases
Solution Approach 1:
The patent modifies the physical and electromagnetic parameters of existing road marking materials by incorporating radar-reflective particles, metallic flakes, or structured surfaces. These parameter changes enhance radar reflectivity while maintaining compatibility with conventional road marking application methods, thereby achieving weather-independent detection without substantially increasing manufacturing complexity.
3Loss of information
If complex signal processing algorithms are used to decipher reflected radar signals, then environmental information can be extracted, but the system requires significant computational resources and processing time
Solution Approach 1:
The patent applies radar-reflective materials to road markings and environmental objects before detection is needed. This preliminary action enhances the radar signature of these objects, resulting in stronger reflected signals that contain more readily extractable information. The pre-enhanced reflections reduce the computational burden required to extract environmental information, as the signal-to-noise ratio is improved before processing begins.
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
The system provides reliable and weather-independent environmental sensing, enabling level 4 and 5 autonomous vehicle capabilities by penetrating fog, snow, and rain, and allowing for accurate lane detection and vehicle control, improving safety and vehicular control.
Implementation Method 1
radar's ability to be transmitted through and penetrate objects and materials without or with limited degradation of the reflected and received radar signal
Implementation Method 2
employing radar reflective materials in road markings and signs, allowing for enhanced visibility and data transmission through radar waves
Data Source
AI summary
A vehicular radar sensing system includes a radar sensor disposed at the vehicle so as to have a field of sensing exterior of the vehicle. The radar sensor includes a plurality of transmitters that transmit radio signals and a plurality of receivers that receive radio signals. The received radio signals are transmitted radio signals that are reflected from from a radar reflective sign that is present along a road being traveled by the vehicle and in the field of sensing of the radar sensor. The radar reflective sign has radar reflective information. A control, via processing of outputs of the receivers by a processor, determines the radar reflective information. A display may display the determined radar reflective information for viewing by a driver of the vehicle. The control may control at least one guidance function of the vehicle responsive at least in part to the determined radar reflective information.