Vehicle Radar Mode Switching for Blind Spot and Reverse Detection
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Solution Overview
Problem
Conventional reverse radar systems have detection blind areas between sector-shaped detection areas, leading to potential collision accidents, and increasing the number of antenna modules to address this issue raises product costs.
Innovation Solution
A multimode radar device with a single antenna module that automatically switches between low and high distance resolution modes based on vehicle motion, utilizing a central processing module and path prediction to enhance detection capabilities and cover blind spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two antenna modules are used to expand detection area, then detection coverage is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies dynamics by making the radar device switch between different detection modes (forward detection mode and reverse detection mode) based on vehicle motion state. The single antenna module dynamically changes its detection characteristics through mode switching, allowing one module to fulfill the role that would otherwise require two fixed modules, thereby reducing device complexity while maintaining comprehensive detection coverage
Solution Approach 2:
The single antenna module is designed to perform multiple functions by operating in different modes. It can detect objects in forward detection mode and reverse detection mode, making one antenna module universal enough to replace what would traditionally require two separate modules, thus expanding detection area without increasing the number of components
2Measurement precision
If high distance resolution mode is used for reverse radar detection, then measurement precision is improved, but detection range is reduced
Solution Approach 1:
The radar device dynamically switches between high distance resolution mode and low distance resolution mode based on the vehicle's motion state. When reversing, it uses high distance resolution mode for precise detection of obstacles like railings and poles. When moving forward, it switches to low distance resolution mode to extend detection range for blind spot detection. This dynamic adaptation resolves the contradiction between precision and range by applying the appropriate mode to the appropriate scenario
Solution Approach 2:
The system changes the detection parameter (distance resolution) based on operational context. By adjusting the distance resolution parameter between high and low settings according to whether the vehicle is reversing or moving forward, the system optimizes both measurement precision and detection range for different operational requirements, eliminating the need to compromise between the two
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 device provides precise detection of obstacles in both forward and reverse scenarios, preventing collisions by covering blind areas and reducing the need for multiple antenna modules, thus maintaining safety while controlling costs.
Implementation Method 1
at least an antenna module 1 sends out at least a transmission signal. When the transmission signal meets an object, a reflection signal is reflected to the antenna module 1, so as to detect the distance or velocity of the vehicle
Implementation Method 2
When the transmission signal meets an object, a reflection signal is reflected to the antenna module 1
Implementation Method 3
detect the distance or velocity of the vehicle moving toward/away from the object
Data Source
AI summary
A multimode radar device includes a central processing module, and an antenna module disposed in a middle area of the rear end of a vehicle and electrically connected with the central processing module. The central processing module has a motion determination switch unit, which has a low distance resolution mode and a high distance resolution mode. The motion determination switch unit detects the moving direction of the vehicle. When the vehicle moves forward, the antenna module operates in the low distance resolution mode. When the vehicle reverses, the antenna module operates in the high distance resolution mode. The present invention applies different distance-based resolution modes for blind spot detection and reverse radar detection, so as to fulfill the purpose and demand in different moving motion.