Wireless Power Coil Resonance for Vibration Detection
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Solution Overview
Problem
Existing contactless power supply devices struggle to detect mechanical vibrations, their intensity, frequency, and frequency component distribution between the power transmission and reception sides effectively.
Innovation Solution
Incorporating a relative movement detection unit within the contactless power supply device that utilizes a resonance circuit and a high-frequency magnetic field to detect amplitude changes in high-frequency voltage, allowing for the determination of physical relative movement between the power transmission and reception coils, thereby enabling the detection of mechanical vibrations and their characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a contactless power supply device uses a resonance circuit with high-frequency magnetic field for power transmission, then power transmission efficiency is improved, but the ability to detect mechanical vibrations and their characteristics deteriorates
Solution Approach 1:
The patent combines the power transmission function and vibration detection function into a single contactless power supply device. The resonance circuit used for wireless power transmission also serves as the detection mechanism for mechanical vibrations, eliminating the need for separate detection sensors and integrating multiple functions into one system.
Solution Approach 2:
The system uses itself for detection - the resonance circuit's own high-frequency voltage amplitude changes are monitored to detect vibrations. The power transmission components themselves become the sensing elements, allowing the system to self-diagnose mechanical vibrations without external detection devices.
2Measurement precision
If the contactless power supply device monitors high-frequency voltage amplitude changes for vibration detection, then vibration detection precision is improved, but device complexity increases
Solution Approach 1:
The system utilizes its own operational parameters (high-frequency voltage amplitude) for detection purposes. By monitoring changes in the voltage amplitude already present during power transmission, the system achieves vibration detection without adding separate sensing hardware, thus maintaining simplicity while improving measurement precision.
Solution Approach 2:
The patent detects vibrations by monitoring changes in the amplitude parameter of the high-frequency voltage already present in the resonance circuit. This approach transforms the detection problem into a parameter monitoring task, using existing circuit parameters rather than introducing new detection 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
Enables the contactless power supply device to accurately determine the presence, intensity, frequency, and intensity distribution of mechanical vibrations, enhancing its capability to perform effective power transmission and reception while providing vibration detection functionality.
Implementation Method 1
a power transmission coil generating a high-frequency magnetic field
Implementation Method 2
a power reception coil generating a high frequency current by the high-frequency magnetic field
Implementation Method 3
The contactless power supply device includes a power transmission module and a power reception module. The power transmission module includes a resonance circuit.
Data Source
AI summary
A contactless power supply device contactless power supply device includes a power transmission module and a power reception module. The power transmission module includes a resonance circuit. The resonance circuit includes a power transmission coil generating a high-frequency magnetic field. The power reception module includes a resonance circuit. The resonance circuit includes a power reception coil generating a high frequency current by the high-frequency magnetic field. At least one of the power transmission module and the power reception module includes a relative movement detection unit that detects an amplitude change of a high-frequency voltage corresponding to the high frequency current flowing through the at least one resonance circuit of the power transmission module or the power reception module and outputs an output signal indicating a physical relative movement of the power transmission coil and the power reception coil.