Vehicle Radar Vertical Misalignment Detection on Uneven Roads
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Solution Overview
Problem
Vehicle radar devices often experience vertical mounting misalignment issues during installation, leading to inaccurate vertical direction information and compromised target detection performance, especially in autonomous driving systems, where precise vertical direction detection is critical.
Innovation Solution
A method and device for detecting vertical mounting misalignment in vehicle radar devices by calculating estimation errors between preset reference vertical angles and actual measured angles using radar signals, with a monitoring range setter, ground component determiner, estimated vertical angle determiner, estimation error determiner, and vertical misalignment determiner to accurately assess and correct misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar device is mounted with specific vertical angle alignment, then accurate vertical direction information can be acquired, but mounting complexity and alignment difficulty increase
Solution Approach 1:
The patent applies preliminary action by pre-storing reference vertical angle values corresponding to different ground distances in a lookup table before operation. During detection, the system simply retrieves the appropriate reference value based on measured ground distance, avoiding complex real-time calculations and simplifying the mounting alignment process while maintaining measurement precision
Solution Approach 2:
The system performs self-diagnosis by automatically detecting vertical mounting misalignment through comparing estimated vertical angles with reference values. The radar device self-corrects for mounting errors by identifying the misalignment and compensating in subsequent measurements, eliminating the need for complex external alignment equipment
2Measurement precision
If vertical mounting misalignment detection method is implemented, then detection accuracy improves, but computational load increases
Solution Approach 1:
Reference vertical angle values are pre-calculated and stored in a lookup table before operation. During runtime, the system performs simple table lookups based on ground distance rather than complex real-time calculations, significantly reducing computational energy while maintaining detection accuracy
Solution Approach 2:
The system focuses computational resources on detecting only vertical mounting misalignment by analyzing specific ground reflection patterns, rather than performing full-spectrum target analysis. This partial action approach achieves the needed detection accuracy with minimal computational overhead
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
This approach enhances the precision of vertical mounting alignment detection, ensuring accurate target detection and preventing potential safety hazards by using a simple configuration and statistical analysis of estimation errors.
Implementation Method 1
A radar device mounted in a vehicle or the like is widely used as a sensor device for vehicle control. The radar device may transmit electromagnetic waves having a predetermined frequency, receive a signal reflected from an object
Data Source
AI summary
The present disclosure relates to a device and method for detecting vertical misalignment of a vehicle radar device and vehicle radar device with the same. A radar device according to an embodiment determines a monitoring range including the ground in front by using the radar signal, determines an error of vertical angles for a number of ground distances within the monitoring range, and detects the vertical mounting misalignment of the radar device by using the error. According to embodiments, it is possible to accurately determine the vertical mounting misalignment of the radar device even if there is a road surface non-uniformity, road slope, or radar beam width change.