Vehicle Millimeter-Wave Radar Rain Clutter for Wind Estimation
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Solution Overview
Problem
Vehicle-mounted radars in intelligent driving vehicles are adversely affected by weather factors such as rain, leading to degraded detection performance and false alarms due to rain clutter, compromising safety and reliability.
Innovation Solution
A method and apparatus that utilize millimeter-wave radar to determine meteorological parameters like wind direction and speed by analyzing range Doppler RV data, incorporating vehicle traveling parameters to enhance accuracy and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle-mounted radar is used to detect environment information, then detection capability is provided, but detection performance deteriorates in rain regions due to signal weakening and rain clutter
Solution Approach 1:
The patent converts the harmful rain clutter echoes into beneficial meteorological information by analyzing the characteristics of raindrop backscattering. Instead of treating rain clutter purely as noise to be filtered, the system extracts wind speed and wind direction parameters from the rain clutter's radial velocity and spatial distribution, transforming a detection obstacle into a useful sensing opportunity.
Solution Approach 2:
The patent introduces meteorological parameter processing as an intermediary layer between the raw radar signals and the environment detection function. By inserting this intermediate processing stage that separates meteorological information extraction from target detection, the system can compensate for signal weakening effects and improve overall detection reliability in adverse weather conditions.
2Measurement precision
If additional sensors are deployed to detect meteorological information, then meteorological detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the vehicle-mounted radar perform multiple functions: both environment detection and meteorological information detection. By processing the same radar signals to extract both target information and meteorological parameters (wind speed, wind direction), the system eliminates the need for separate meteorological sensors, reducing device complexity and cost while maintaining measurement precision.
Solution Approach 2:
The radar system serves itself by using its own transmitted signals and received echoes to determine meteorological parameters. The system processes its own operational data (radial velocity, signal strength, spatial distribution) to derive wind information, eliminating the need for external dedicated sensors and reducing overall system complexity.
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
Improves the accuracy and reliability of meteorological information processing, enabling safer intelligent driving by utilizing existing radar systems without additional sensors, thus enhancing vehicle safety in various weather conditions.
Implementation Method 1
obtaining first range Doppler RV data collected by a millimeter-wave radar on a vehicle; determining a first meteorological parameter based on the first RV data, where the first meteorological parameter includes a radial velocity of a raindrop
Data Source
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AI summary
A meteorological information processing method and processing apparatus are provided and are applied to the field of radar technologies. First RV data collected by a millimeter-wave radar on a vehicle is obtained (S201); a first meteorological parameter is determined based on the first RV data, where the first meteorological parameter includes a radial velocity of a raindrop in an environment in which the vehicle is located when the millimeter-wave radar collects the first RV data (S202); a first traveling parameter is obtained, where the first traveling parameter includes a vehicle speed and/or a yaw rate of the vehicle present when the millimeter-wave radar collects the first RV data (S203); and a first wind direction and/or a first wind speed in the environment are/is determined based on the first traveling parameter and the first meteorological parameter (S204). In the method, meteorological information in an environment in which an intelligent driving vehicle is located may be processed, to facilitate safe driving of the intelligent driving vehicle based on the meteorological information.