Inductive Charging Coil Pose Correction Against Environmental Drift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for determining the relative pose between primary and secondary winding structures in inductive power transfer systems face inaccuracies due to environmental influences, which can change over time, affecting the efficiency and accuracy of power transfer.
Innovation Solution
A system that includes a first pose determining means for initial relative pose determination and a correcting means to adjust and correct the pose determination, using adjustable parameters and reference poses to minimize the impact of environmental changes, allowing for improved accuracy and robustness over the system's lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the relative pose determination relies on evaluation of transmitted signals, then the system can determine the relative pose between primary and secondary winding structures, but the accuracy is decreased due to environmental influences such as metal objects, ferromagnetic material, and other disturbances that change over lifetime
Solution Approach 1:
The patent changes the parameters used for pose determination from signal evaluation to geometric parameter evaluation. Specifically, it uses parameters such as the position and orientation of the primary winding structure, the position of the vehicle, and the orientation of the vehicle to determine the relative pose. This parameter change makes the system robust against environmental influences like metal objects and ferromagnetic materials that disturb signal transmission.
Solution Approach 2:
The patent replaces the signal-based electromagnetic measurement system with a geometric/mechanical parameter-based system. Instead of relying on transmitted signals that are affected by electromagnetic environmental factors, the system uses geometric relationships and mechanical parameters (vehicle position, orientation, winding structure parameters) to determine relative pose, thereby substituting a vulnerable system with a more robust one.
2Productivity
If the system uses fixed pose determination parameters, then the initial pose determination can be performed, but the accuracy deteriorates over lifetime due to changing environmental influences
Solution Approach 1:
The patent introduces dynamic adaptability to the pose determination system. The system can adapt its parameters and correction values based on current environmental conditions and operational state. This dynamic characteristic allows the system to maintain high accuracy over the lifetime of the inductive power transfer system, preventing deterioration due to changing environmental influences while maintaining charging efficiency.
Solution Approach 2:
The system performs self-correction and self-optimization by using the determined relative pose to calculate correction values that are applied back to improve subsequent pose determinations. This self-service mechanism allows the system to automatically compensate for environmental changes and maintain accuracy without external intervention, thereby preserving charging efficiency over time.
3Measurement precision
If no correction mechanism is implemented, then the system structure remains simple, but the pose determination accuracy is insufficient due to environmental disturbances
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values based on predetermined relative poses and environmental conditions. These correction values are prepared in advance and applied when determining the actual relative pose, thereby improving accuracy without requiring complex real-time correction mechanisms. This preliminary preparation balances accuracy improvement with system complexity management.
Solution Approach 2:
The patent introduces correction values as an intermediary element between the raw pose determination and the final accurate pose. These correction values mediate the effect of environmental disturbances by compensating for their influence. This intermediary approach improves measurement precision while adding only minimal system complexity, as the correction mechanism operates as a separate computational layer rather than requiring fundamental system redesign.
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
The system provides improved accuracy and reliability in determining the relative pose between primary and secondary winding structures, adapting to changing environmental conditions and ensuring efficient inductive power transfer by adjusting correction values and parameters, thereby maintaining optimal charging efficiency.
Implementation Method 1
The primary winding structure generates an alternating electromagnetic field if the primary winding structure is energized or supplied with operating current
Implementation Method 2
a secondary unit with the secondary winding structure for receiving an alternating electromagnetic field which is generated by the primary winding structure
Data Source
AI summary
A system for determining a relative pose between a primary winding structure and a secondary winding structure of a system for inductive power transfer. The system includes at least a first pose determining means for determining a relative pose, wherein the relative pose is determinable by the first pose determining means. The system further includes at least one correcting means for correcting the pose determination by the first pose determining means. A correction of the pose determination is adjustable.