Millimeter-Wave Radar Layout for Wide-Angle Sensing and Low Interference
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Solution Overview
Problem
Existing millimeter-wave radars in automobiles have limited angle detection ranges, particularly in the front-rear direction, and struggle with interference issues that affect detection accuracy.
Innovation Solution
A millimeter-wave radar system with a radome, antenna board, metal middle frame, and main control board configuration that includes an image acquisition module, allowing for large-angle detection through a through-hole and electromagnetic interference reduction, combined with data fusion from millimeter-wave and image data to enhance detection range and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a traditional millimeter-wave radar structure is used, then the device complexity is low, but the detection angle range is limited and cannot achieve wide-angle detection in the front-rear direction
Solution Approach 1:
The patent introduces a new spatial dimension by adding an image acquisition module that extends outside the radome through a through-hole and notch structure. This allows the detection system to capture data from additional angular dimensions (up to 180 degrees) that were previously inaccessible in traditional millimeter-wave radar configurations, thereby expanding the detection angle range without proportionally increasing overall device complexity
Solution Approach 2:
The patent implements a nested structure where the image acquisition module is integrated into the existing radome framework. The module passes through a notch in the metal middle frame and extends outside the radome through a through-hole, nesting the additional detection capability within the existing structural envelope rather than requiring a completely separate external system
2Measurement precision
If the image acquisition module is integrated into the radome structure, then the detection accuracy is improved by supplementing blind spots, but the device complexity increases due to additional components and integration requirements
Solution Approach 1:
The patent merges the image acquisition module with the millimeter-wave radar system by integrating it into the radome structure. The module shares the same physical housing and structural framework, allowing the system to combine millimeter-wave detection data with visual image data from the same angular positions, thereby improving detection accuracy through multi-modal data fusion without requiring completely separate detection systems
Solution Approach 2:
The radome structure itself serves as an intermediary framework that accommodates both the traditional millimeter-wave radar components and the additional image acquisition module. The through-hole and notch structures act as intermediaries that allow the image module to extend outside the radome while maintaining structural integrity, facilitating the integration of multiple detection technologies within a unified system architecture
3Area of moving object
If multiple detection modules are added to expand detection range, then the detection angle increases to 180 degrees, but the electromagnetic interference between components increases
Solution Approach 1:
The patent extracts the image acquisition module from the internal radar cavity and positions it extending outside the radome through the through-hole and notch structure. This physical separation extracts the image sensor from the electromagnetic environment inside the radome, reducing electromagnetic interference between the image module and the millimeter-wave antenna while still allowing both modules to contribute to the expanded 180-degree detection coverage
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 achieves a wider detection angle of up to 180 degrees and improved detection accuracy by supplementing millimeter-wave blind spots with image data, while minimizing interference, thus enhancing the reliability and safety of automobile driving systems.
Implementation Method 1
the radome is made of a material through which millimeter-waves can pass
Data Source
AI summary
The millimeter-wave radar includes a radome, an antenna board, a metal middle frame, a main control board and a base which are sequentially arranged. An image acquisition module is provided on one side of the main control board facing the radome. The antenna board is provided with a radar transceiver control module and is electrically connected to the main control board. The metal middle frame is provided with a notch through which the image acquisition module passes. The radome is made of a material through which radar waves emitted by the antenna board can pass; the radome is connected to the base; the main control board, the antenna board and the metal middle frame are located in a space enclosed by the radome and the base; and the radome is provided with a through-hole which communicates with the notch so that the image acquisition module extends outside of the through-hole.