Inductive Vehicle Charging Alignment Using Dynamic Signal Gain
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Solution Overview
Problem
Existing inductive vehicle charging systems face challenges in determining the relative position and distance between the vehicle module and the floor module due to dynamic changes in signal transmission characteristics, which affect the amplification requirements for optimal energy transfer.
Innovation Solution
The system dynamically adjusts the transmission power of the transmitter in the vehicle module and/or the damping properties of the signal transfer path based on the current distance between the modules, ensuring optimal signal strength and preventing electrical overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high amplification is applied for large distances, then signal strength at receiver is improved, but electrical overload risk increases when distance decreases
Solution Approach 1:
The patent implements dynamic adjustment of amplification factors based on real-time distance measurements between transmitter and receiver. The receiving unit changes its signal amplification level according to the current distance, ensuring optimal signal strength while preventing electrical overload. This dynamic adaptation resolves the contradiction between needing high amplification for distant signals and avoiding overload for close signals.
Solution Approach 2:
The system employs feedback mechanisms where the receiving unit continuously monitors signal characteristics and distance information, then adjusts amplification factors accordingly. This closed-loop control ensures that amplification is optimized for the current operating condition, preventing both weak signal reception and electrical overload while adapting to changing distances.
2Device complexity
If fixed amplification is used, then device complexity is reduced, but measurement precision deteriorates due to dynamic distance changes
Solution Approach 1:
The patent implements dynamic adjustment of amplification factors based on real-time distance measurements between transmitter and receiver. The receiving unit changes its signal amplification level according to the current distance, ensuring optimal signal strength while preventing electrical overload. This dynamic adaptation resolves the contradiction between needing high amplification for distant signals and avoiding overload for close signals.
Solution Approach 2:
The system dynamically changes the amplification parameter based on distance measurements. By adjusting the amplification factor as a variable parameter rather than keeping it fixed, the system maintains high measurement precision for position determination while adapting to varying transmission distances, thereby resolving the contradiction between simplicity and precision.
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
This approach ensures optimal signal strength is maintained at the receiver, allowing for accurate determination of relative position and distance, and prevents electrical overload, thereby extending the service life of the receiver.
Implementation Method 1
a transmitter S1 for wirelessly emitting signals SigS1(ti)
Implementation Method 2
electrical energy being transmitted inductively from the floor module to the vehicle module
Data Source
AI summary
A system for determining a relative position and/or a relative distance of a transmitter with respect to a receiver, including: the transmitter for wirelessly emitting signals at the time ti, the receiver or receiving a signal at the time ti+Δt, wherein the receiver is configured to determine the following: a signal level P and/or a signal-to-noise ratio SNR of the received signal, a direction of incidence of the received signal and, on the basis of P and E, a relative position POS of the transmitter with respect to the receiver and/or a relative distance D between the transmitter and the receiver, and another transmitter connected to the receiver and intended to wirelessly transmit P, SNR, POS, and/or D to another receiver connected to the transmitter.