Inductive Charging Coil Pose Correction Under Environmental Drift
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Solution Overview
Problem
Existing systems for determining the relative pose between a primary and secondary winding structure in inductive power transfer systems are prone to inaccuracies due to environmental influences, which can change over the system's lifetime, affecting the accuracy of the relative pose determination during vehicle charging.
Innovation Solution
A system and method that includes a primary unit with a primary winding structure and a secondary unit with a secondary winding structure, utilizing a first pose determining means to determine the relative pose, and a correcting means to adjust and correct the pose determination over time, minimizing the impact of environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a first pose determining means is used to determine the relative pose between primary and secondary winding structures, then the charging alignment can be established, but the determination accuracy decreases due to environmental influences such as metal objects, ferromagnetic material, and changing conditions over system lifetime
Solution Approach 1:
The system employs a feedback mechanism where a second pose determining means continuously monitors the relative pose and provides correction values to adjust the charging alignment. This feedback loop compensates for environmental influences by comparing the actual pose with the desired pose and making real-time adjustments, thereby maintaining determination accuracy despite changing conditions over system lifetime.
Solution Approach 2:
The patent introduces a second pose determining means as an intermediary component that acts as a reference system. This intermediary provides a stable reference frame that is less susceptible to environmental influences, and its data is used to correct the measurements from the first pose determining means, thereby isolating the system from harmful environmental factors.
2Measurement precision
If the system relies on evaluation of transmitted signals for pose determination, then the relative pose can be determined, but the accuracy decreases due to signal disturbances from environmental factors
Solution Approach 1:
The system uses feedback from the second pose determining means to correct signal quality issues. By continuously monitoring and comparing pose data from both determination means, the system can identify and compensate for signal disturbances caused by environmental factors, maintaining accurate pose determination despite information loss in the transmitted signals.
Solution Approach 2:
The patent creates a reference copy of the pose determination process through the second pose determining means. This copy serves as a reliable reference that can be used to validate and correct the primary measurement, providing redundancy that protects against signal quality degradation and information loss.
3Reliability
If environmental influences change over the system lifetime, then the system must adapt to maintain accuracy, but this requires additional correction mechanisms
Solution Approach 1:
The feedback mechanism provided by the second pose determining means enables the system to automatically adapt to environmental changes over its lifetime. This continuous correction process maintains reliability without requiring manual intervention or complex reconfiguration, as the system self-adjusts based on the reference data from the second determination means.
Solution Approach 2:
The system performs self-correction using the second pose determining means as an internal reference. This self-service capability allows the system to maintain accurate pose determination throughout its lifetime without external intervention, automatically compensating for environmental changes and reducing the need for complex external calibration mechanisms.
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 in determining the relative pose by adapting to changing environmental influences, ensuring precise alignment for efficient inductive power transfer.
Implementation Method 1
The vehicle can comprise the secondary unit with the secondary winding structure for receiving an alternating electromagnetic field which is generated by the primary winding structure of the primary unit. The primary winding structure generates the alternating electromagnetic field if the primary winding structure is energized or supplied with operating current.
Data Source
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AI summary
The invention relates to a system for determining a relative pose between a primary winding structure (18) and a secondary winding structure (21) of a system (2) for inductive power transfer, wherein the system comprises at least a first pose determining means for determining a relative pose, wherein the relative pose is determinable by the first pose determining means, wherein the system comprises at least one correcting means for correcting the pose determination by the first pose determining means, wherein a correction of the pose determination is adjustable.