Radar Vertical Axis Misalignment Detection
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Solution Overview
Problem
Existing radar devices cannot detect axis misalignment in the vertical direction, which affects their detection performance and maintainability.
Innovation Solution
A radar device with a transmitting unit that transmits waves parallel to the vehicle's travel direction and a determining unit that analyzes reception signals to detect upward or downward axis misalignment, using signal processing units to determine the accuracy of axis alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar devices use horizontal angle calculation based on phase differences to detect axis misalignment, then horizontal axis misalignment can be detected, but vertical axis misalignment cannot be detected
Solution Approach 1:
The patent extends the misalignment detection capability from the horizontal dimension to the vertical dimension by analyzing elevation angle information. The determining unit calculates the elevation angle of detected targets and compares it with expected elevation angles to detect vertical axis misalignment, thereby adding a new detection dimension to the existing horizontal detection system.
Solution Approach 2:
The radar device is enhanced to perform both horizontal and vertical axis misalignment detection using the same receiving antennas and signal processing system. The determining unit utilizes existing reception signals and target position information to simultaneously detect misalignment in both horizontal and vertical directions, making the system multi-functional without requiring separate detection systems.
2Ease of manufacture
If radar devices are mounted on vehicle bumpers to enable compact installation, then installation flexibility is improved, but transmission axis misalignment occurs after minor collisions
Solution Approach 1:
The system performs preliminary detection of transmission axis misalignment by continuously monitoring target position information and elevation angles. Before misalignment significantly affects detection performance, the system can identify the condition and trigger warnings or realignment procedures, allowing for preventive maintenance rather than reactive fixes.
Solution Approach 2:
The radar device incorporates a feedback mechanism where the determining unit continuously analyzes detected target positions and elevation angles to monitor transmission axis alignment status. This feedback information can be used to alert operators to misalignment conditions, enabling real-time or near-real-time adjustment of the transmission axis to maintain optimal detection performance.
3Device complexity
If radar devices lack vertical axis misalignment detection capability, then device complexity is reduced, but detection performance deteriorates after vertical misalignment occurs
Solution Approach 1:
The radar device performs self-diagnosis by using its own received signals and processed target information to detect misalignment conditions. The determining unit analyzes elevation angle data from detected targets and compares it with expected values to identify vertical axis misalignment, allowing the system to monitor its own performance without requiring external testing equipment or complex additional sensors.
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 high-accuracy detection of vertical axis misalignment, improving detection performance and maintainability by determining axis misalignment in the vertical direction.
Implementation Method 1
receives reflected waves of the transmission waves from targets
Data Source
AI summary
There is provided a radar device which is mounted on a moving object and configured to detect a target on the basis of reception signals acquired by receiving reflected waves from the target by receiving antennae. A transmitting unit has a transmission axis substantially parallel to a traveling direction of the moving object. The transmitting unit is configured to transmit transmission waves around the transmission axis as a center thereof. A determining unit is configured to determine upward axis misalignment or downward axis misalignment of the transmission axis, on the basis of the reception signals acquired by receiving the reflected waves of the transmission waves.