Radar Axis Displacement Calculation Using Camera and Reflector
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Solution Overview
Problem
Existing radar axis adjustment techniques are limited in flexibility and accuracy, particularly for radars not aligned parallel to the vehicle's travel direction and those requiring high accuracy in both horizontal and vertical direction estimation.
Innovation Solution
A radar axis displacement amount calculation device comprising a reflector, a camera, and a processor that calculates the displacement between the radar axis and a reference direction by using reflected radar transmission waves, allowing for high installation flexibility and accurate positioning adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radar axis adjustment technique from Japanese Patent No. 3511605 is used, then the radar axis can be aligned with the vehicle's travel direction, but it cannot be applied to radars with non-parallel orientations or those requiring high accuracy in vertical direction estimation
Solution Approach 1:
The patent applies universality by making the adjustment device applicable to multiple radar orientations (both parallel and non-parallel to travel direction) and multiple measurement dimensions (horizontal and vertical). The device achieves this through configurable reflector positions and a comprehensive calculation method that handles various radar installation scenarios, transforming a specialized adjustment technique into a universal solution.
Solution Approach 2:
The patent extends the adjustment capability from two-dimensional horizontal alignment to three-dimensional spatial alignment by incorporating vertical direction measurement. The reflector arrangement and calculation method now account for both horizontal and vertical displacement components, enabling accurate positioning in all three spatial dimensions rather than仅限于 horizontal plane.
2Adaptability or versatility
If a radar is installed on a movable part, then the radar can be positioned on moving components, but the radar may be displaced from the proper installation position requiring frequent checks
Solution Approach 1:
The patent implements feedback by using the radar itself to detect the position of the reflector, then using this detection information to calculate the radar's own displacement. This self-feedback mechanism allows the system to automatically determine positioning accuracy without external reference equipment, maintaining reliability while enabling flexible installation on movable parts.
Solution Approach 2:
The system applies self-service by having the radar perform its own axis verification and displacement calculation using the reflector as a reference target. The radar's transmission and reception functions are utilized to measure its own positioning accuracy, eliminating the need for separate verification equipment or manual checking procedures.
3Device complexity
If the radar axis is aligned parallel to the vehicle's travel direction, then the adjustment is simplified, but it limits the radar to specific orientations and reduces installation flexibility
Solution Approach 1:
The patent applies parameter changes by allowing the reflector's position parameters (coordinates in three-dimensional space) to be freely configured rather than fixed in a specific orientation. The calculation method dynamically adjusts based on the actual positions of the radar and reflector, enabling the system to handle various installation orientations without increasing procedural complexity through automated coordinate transformation and displacement calculation.
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 accurate calculation and adjustment of radar axis displacement, enhancing installation flexibility and maintaining high positioning accuracy for radars on vehicles and construction machines, regardless of their orientation or directional requirements.
Implementation Method 1
a radar attached to a first object; a reflector that reflects a radar transmission wave in an arrival direction of the radar transmission wave
Implementation Method 2
a reflector that reflects a radar transmission wave in an arrival direction of the radar transmission wave
Data Source
AI summary
A processor generates first position information on a relative position between a camera and a radar, acquires, from the radar, second position information on a relative position between the radar and a reflector, the second position information being generated by using an arrival direction of the radar transmission wave, and calculates a displacement amount by comparing the first position information and the second position information with each other.