Inductive Susceptor Detection Using Dual-Frequency Coil Signals
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Solution Overview
Problem
Existing aerosol generating devices using inductive heating schemes face challenges in determining whether a susceptor has been changed, which can affect heating efficiency and performance.
Innovation Solution
The method involves applying alternating magnetic fields at different frequencies to determine electrical characteristics of the susceptor, allowing the device to identify susceptor changes and adjust heating signals accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single frequency signal is applied to the coil, then the device structure is simple, but the ability to detect susceptor changes is insufficient
Solution Approach 1:
The patent applies periodic action by using multiple alternating magnetic field signals with different frequencies to periodically excite the susceptor. This allows the system to measure electrical characteristics at different frequencies and detect susceptor changes more accurately, resolving the contradiction between detection accuracy and device complexity.
2Measurement precision
If multiple frequencies are applied to detect susceptor changes, then detection accuracy improves, but energy consumption increases
Solution Approach 1:
The patent implements partial action by applying multiple frequency signals only when susceptor change detection is required, rather than continuously. The controller selectively applies different frequency signals based on detection needs, reducing overall energy consumption while maintaining measurement accuracy when detection is performed.
3Reliability
If the device adapts to different susceptors, then heating performance consistency improves, but control system complexity increases
Solution Approach 1:
The patent uses feedback by measuring the electrical characteristics of the susceptor at different frequencies and using this information to adaptively adjust the heating control characteristics. The controller receives feedback from the susceptor's electrical response and modifies the heating signal accordingly, ensuring consistent heating performance across different susceptor types while managing control complexity through intelligent adaptation.
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 accurate detection of susceptor changes, ensuring consistent heating performance and efficiency by adapting control signals based on susceptor properties.
Implementation Method 1
an e-cigarette may use a coil to generate an alternating magnetic field to generate eddy currents in a susceptor adjacent to the cigarette
Implementation Method 2
generate eddy currents in a susceptor adjacent to the cigarette. The temperature of the susceptor may increase due to eddy currents generated in the susceptor
Implementation Method 3
The temperature of the susceptor may increase due to eddy currents generated in the susceptor
Data Source
AI summary
A method of determining whether a susceptor is changed, according to an embodiment, includes applying a first signal to a coil of a heater so that an alternating magnetic field having a first frequency is generated, determining a first value of an electrical characteristic of a susceptor indicated by the first signal, applying a second signal to the coil of the heater so that an alternating magnetic field having a second frequency is generated, determining a second value of an electrical characteristic of the susceptor indicated by the second signal, and determining whether the susceptor is a changed susceptor based on the first value and the second value.