Multi-Plane Wheel Positioning Target for Calibration Precision
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Solution Overview
Problem
Existing wheel positioning systems for vehicle calibration suffer from low precision in calibration calculations due to the use of single target surface three-dimensional targets.
Innovation Solution
A wheel positioning system that includes a three-dimensional target with at least three target surfaces in different planes, each with known spatial and geometric properties, attached to a wheel. The system uses an image acquisition device and processing system to acquire and process images of the target elements, allowing for precise wheel positioning calculations by configuring multiple groups of target surfaces for calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single target surface three-dimensional target is used for wheel positioning, then the device structure is simple, but the calibration calculation precision is low
Solution Approach 1:
The three-dimensional target is divided into multiple target surfaces (at least three), each located in different planes and each having target elements with known spatial and geometric properties. This segmentation allows the system to perform multiple independent measurements and calculations, thereby improving calibration precision without requiring a complete redesign of the target structure.
Solution Approach 2:
The patent transitions from a single target surface (2D measurement plane) to multiple target surfaces distributed in three-dimensional space. By utilizing targets in different planes and spatial configurations, the system gains additional dimensional information for calculation, significantly enhancing measurement precision while maintaining reasonable device complexity.
2Measurement precision
If multiple target surfaces are used for calibration, then the calibration precision is improved, but the device complexity increases
Solution Approach 1:
The multiple target surfaces share common characteristics: each has target elements with known spatial and geometric properties, and all can be processed by the same image acquisition device and calculation algorithm. This multi-functionality allows the system to use multiple surfaces for calibration without proportionally increasing processing complexity, as the same computational framework handles all surfaces.
Solution Approach 2:
The patent changes the parameter of target surface quantity from one to multiple, while maintaining consistent geometric and spatial property definitions across all surfaces. This parameter change enables improved precision through multiple measurement points without requiring fundamentally different measurement or calculation methods, thus limiting the increase in device complexity.
3Reliability
If multiple groups of target surfaces are used for calculation, then the reliability of wheel positioning is improved, but the calculation complexity increases
Solution Approach 1:
The system performs calculations using multiple groups of target surfaces and compares the results to determine consistency. This feedback mechanism verifies measurement reliability by cross-checking multiple independent calculations, ensuring that the final wheel positioning result is accurate and reliable without requiring overly complex calculation systems.
Solution Approach 2:
The patent uses at least three target surfaces, creating multiple possible groups for calculation (excessive action). By having more target surfaces than the minimum required for a single calculation, the system can perform multiple redundant calculations and comparisons, improving reliability while the calculation complexity remains manageable due to the systematic approach to processing these groups.
Data Source
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AI summary
A three-dimensional target (100), a wheel positioning system, and a wheel positioning method, relating to the technical field of calibration. The three-dimensional target (100) comprises a base body (10); the base body (10) is provided with at least three target surfaces, and the at least three target surfaces are all in different planes. The at least three target surfaces are each provided with target elements (14), the spatial positional relationship between the target elements (14) is known, and the geometric properties of the target elements (14) are known. Each of the at least three target surfaces is used for wheel positioning. Two of the at least three target surfaces are a group of calculation units, and the spatial position relationship between the target elements (14) of at least two group of calculation units is used for determining the position of a wheel. By using two target surfaces as a group, the at least three target surfaces can be configured into multiple groups, and calibration is performed according to the multiple target surfaces; thus, the accuracy of calibration calculation can be improved.