3D Magnetic Localization for Trackless AGVs
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Solution Overview
Problem
Existing trackless automated guided vehicle (AGV) positioning technologies, such as laser reflective labels and magnetic columns, are limited to two-dimensional scenarios and require prior emptying of the plant site, making them impractical for three-dimensional environments and lacking in flexibility.
Innovation Solution
A localization device using a magnetic field with a magnetic landmark and a set of tri-axes magnetic sensors mounted on the moving object, allowing for precise positioning in three-dimensional space by sensing the magnetic field and generating identification data for accurate coordinate calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If laser reflective labels or magnetic columns are used for positioning, then positioning can be achieved in two-dimensional scenarios, but the plant site needs to be emptied in advance and cannot be applied to three-dimensional scenarios
Solution Approach 1:
The patent transitions from two-dimensional positioning labels to three-dimensional magnetic field positioning by introducing a magnetic landmark with vertical magnetic field components. The magnetic landmark generates magnetic fields in three-dimensional space, allowing sensors to detect position not only in horizontal planes but also in vertical dimensions, thereby enabling 3D positioning capability.
Solution Approach 2:
The patent replaces mechanical/physical labeling systems (laser reflective labels, magnetic columns requiring physical installation) with a magnetic field-based system. The magnetic landmark uses electromagnetic fields instead of physical markers, eliminating the need for plant emptying and complex physical deployment while maintaining positioning functionality.
2Measurement precision
If label positioning technologies are used, then positioning can be implemented, but the plant site needs to be emptied in advance which reduces productivity
Solution Approach 1:
The magnetic landmark system is self-contained and generates its own magnetic field without requiring external preparation or emptying of the plant site. The system serves itself by creating the positioning environment through the magnetic landmark's inherent magnetic field generation capability, eliminating the need for site preparation work.
Solution Approach 2:
The magnetic landmark is pre-configured with magnetic generation elements before deployment. The system performs preliminary setup by establishing the magnetic field environment in advance through the magnetic landmark, so that when the actual positioning is needed, the environment is already prepared without requiring plant emptying.
3Adaptability or versatility
If conventional positioning methods are used, then positioning can be achieved, but they are limited to two-dimensional scenarios and cannot be used in three-dimensional scenarios
Solution Approach 1:
The magnetic landmark serves multiple functions: it generates magnetic fields for positioning, defines the positioning area, and provides reference signals for both 2D and 3D positioning scenarios. This multi-functional design allows the same device to handle various positioning dimensions without requiring separate systems for different dimensional needs.
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 precise positioning of moving objects in three-dimensional spaces without the need for prior environmental arrangement, achieving millimeter-level precision and improved resistance to noise, surpassing conventional methods in accuracy and efficiency.
Implementation Method 1
a set of at least four tri-axes magnetic sensors senses the magnetic field of the magnetic landmark and generates at least four magnetic signals
Data Source
AI summary
A localization device using a magnetic field for positioning a moving object is provided. The localization device includes a magnetic landmark, a set of at least four tri-axes magnetic sensors mounted on the moving object, and a logic operation processing unit. The set of at least four tri-axes magnetic sensors forms four non-coplanar points in a three-dimension coordinate system. The logic operation processing unit is connected to the set of at least four tri-axes magnetic sensors. The set of at least four tri-axes magnetic sensors senses the magnetic field of the magnetic landmark and generates at least four magnetic signals transmitted to the logic operation processing unit.