Dual-Radar Blockage Detection Using FFT Relative-Speed Comparison
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Solution Overview
Problem
Radar devices in vehicles can be blocked by external substances or objects, leading to degraded accuracy and reliability, necessitating a method to determine their blockage state.
Innovation Solution
A radar control apparatus and method that utilizes two radars to determine relative speeds through Fast Fourier Transform (FFT) on reception signals, comparing object information to assess the states of each radar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar devices are mounted to detect objects in the vicinity of a host vehicle, then the reliability of safety functions is improved, but the radar devices may be blocked by external substances or objects causing degraded accuracy
Solution Approach 1:
The patent combines information from multiple radars (first radar and second radar) to perform joint object determination. By merging the detection results and comparing relative speeds from different radar viewpoints, the system can identify and eliminate blocked radar data, thereby maintaining measurement precision while preserving the reliability provided by multiple radars.
2Reliability
If multiple radars are used to improve detection reliability, then the ability to determine blockage states is improved, but the device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the determination unit continuously compares relative speeds from multiple radars to assess blockage states. The system uses the relative speed comparison as feedback to identify which radar is blocked, and automatically adjusts by relying on the unblocked radar's data, thereby managing device complexity through intelligent control algorithms.
Solution Approach 2:
The radar control apparatus performs self-diagnosis by automatically comparing detection results from multiple radars to identify blockage states without external intervention. The system serves itself by using its own multi-radar configuration to detect and compensate for blockages, reducing the need for additional complex external monitoring systems.
3Measurement precision
If separate evaluation of each radar's state is performed, then the accuracy of blockage determination is improved, but the loss of time and processing efficiency increases
Solution Approach 1:
The patent merges the evaluation process by simultaneously analyzing relative speeds from multiple radars to determine blockage states in a single integrated operation. Instead of separately evaluating each radar, the system combines the data processing and blockage determination into one unified process, reducing time loss while maintaining accurate blockage identification through comparative analysis.
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
Enables determination of radar blockage by comparing object information from multiple radars, ensuring accurate and reliable operation without separately evaluating each radar's state.
Implementation Method 1
a transmitter/receiver configured to transmit transmission signals used for detecting the vicinity of a host vehicle through a first radar and a second radar mounted to host vehicle
Implementation Method 2
a calculator configured to determine a measured value by performing a Fast Fourier Transform (FFT) on a reception signal and determine a first relative speed for at least one first measured value
Data Source
AI summary
The present embodiment relates to a radar control apparatus and a method. More specifically, according to the present embodiment, there is provided a radar control apparatus including: a transmitter/receiver configured to transmit transmission signals used for detecting the vicinity of a host vehicle through a first radar and a second radar mounted to a host vehicle and receive reflected reception signals; a calculator configured to determine a measured value on a reception signal and determine a first relative speed for at least one first measured value determined in a Field Of View (FOV) of the first radar and a second relative speed for at least one second measured value determined in a field of view of the second radar; and a determiner configured to determine states of the first radar and the second radar based on the first relative speed and the second relative speed.