Wireless Key Lock Core Using Magnetic Resonance Coupling
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Solution Overview
Problem
Existing electrical lock-and-key systems face issues with power transfer efficiency due to oxidation, corrosion, and magnetic leakage, and require precise alignment, which complicates the operation and reliability of wireless charging technologies.
Innovation Solution
The system employs a magnetic core with a coil wrapped around it, using pulse sequences to modulate energy transfer and determine key position, enabling efficient wireless charging and secure communication for locking and unlocking operations without the need for external sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact electrodes are used for power transfer, then power transfer efficiency is maintained, but oxidation and corrosion occur leading to operation failure
Solution Approach 1:
The patent replaces the mechanical contact electrode system with a wireless power transfer system using magnetic resonance coupling. The key includes a transmit coil and the lock contains a receive coil, eliminating physical contact between metal surfaces and thus preventing oxidation and corrosion while maintaining reliable power transfer.
2Object-generated harmful factors
If induction coils are used for wireless power transfer, then contact corrosion is eliminated, but coil size becomes large and cumbersome
Solution Approach 1:
The patent changes the operating parameters by using magnetic resonance coupling at specific resonant frequencies. This allows the use of smaller coils compared to traditional induction methods, as the resonant coupling enhances the magnetic field interaction efficiency, enabling compact coil design while maintaining effective wireless power transfer.
3Use of energy by moving object
If magnetic core is added to improve energy transfer efficiency, then power transfer efficiency increases, but magnetic leakage and coil overheating occur
Solution Approach 1:
The patent uses magnetic shielding materials as intermediaries to contain and direct the magnetic field lines between the transmit and receive coils. These shielding materials prevent magnetic leakage to surrounding areas and distribute the magnetic flux more evenly, reducing localized overheating while maintaining high energy transfer efficiency through the key-lock interface.
4Use of energy by moving object
If precise alignment is required for coil positioning, then energy transfer efficiency is improved, but system complexity increases due to alignment detection requirements
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors the coupling between the transmit and receive coils by detecting changes in impedance or resonant frequency. Based on this feedback, the system automatically adjusts the power transfer parameters or provides visual guidance to the user for optimal alignment, achieving high energy transfer efficiency without requiring complex external alignment detection sensors.
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 solution enhances power transfer efficiency, reduces device size, and ensures reliable operation with improved alignment and security through encrypted communication, addressing the limitations of existing technologies.
Implementation Method 1
the electrical key can provide power to the electrical lock wirelessly to facilitate operations of the electrical lock
Implementation Method 2
Both the key and lock can include coils and magnetic cores for facilitating the induction-based position detection and wireless charging
Implementation Method 3
a measurement module configured to measure a current or voltage on the coil excited by the voltage or current
Data Source
AI summary
One embodiment provides an electrical key for locking and unlocking an electrical lock. The electrical key includes an energy-transfer unit that includes a magnetic core and a coil wrapped around the magnetic core, a pulse generator configured to generate a first pulse sequence including alternating pulse on and pulse off cycles and a second pulse sequence comprising a continuous pulse train, and a modulator driver configured to modulate a voltage or current on the coil using the generated first or second pulse sequence, a measurement module configured to measure a current or voltage on the coil excited by the modulated voltage or current, respectively, a key-position determination module configured to determine a relative position between the electrical key and the electrical lock based on the measured current or voltage, and a communication interface for communicating with the electrical lock to facilitate the locking and unlocking of the electrical lock.