Induction Power Coil Dual-Function Detection Module
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Solution Overview
Problem
Induction type power supply systems pose a risk to smart cards due to excessively strong electromagnetic energies, which can damage their internal chips, and existing detection methods require additional card readers and increased device size, leading to higher costs and inefficiencies.
Innovation Solution
A supplying-end module for induction type power supply systems that utilizes the same coil for both power delivery and smart card detection, employing a first driver for power output and a second driver to control the coil for sending detection signals, allowing for the detection of smart cards through resonance and reflection signal analysis without the need for additional card readers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional card readers are disposed together with the power sending coil to detect smart cards, then smart card detection reliability is improved, but device complexity and cost increase
Solution Approach 1:
The power sending coil is designed to perform dual functions: delivering power wirelessly and detecting smart cards. By controlling the coil to operate at different frequencies (power delivery frequency vs. detection frequency), the same hardware component achieves multiple purposes, eliminating the need for separate card readers and reducing device complexity while maintaining detection reliability
Solution Approach 2:
The patent combines the power delivery function and smart card detection function into a single integrated system using the same coil. The control unit coordinates both functions by switching the coil's operating mode, merging what were previously separate components into one unified structure, thereby reducing overall device complexity
2Reliability
If additional card readers are disposed together with the power sending coil to detect smart cards, then smart card detection reliability is improved, but manufacturing cost increases
Solution Approach 1:
The power sending coil serves as both a power transmission antenna and a smart card detection sensor. This multi-functionality reduces the bill of materials by eliminating redundant components (separate card readers), directly lowering manufacturing costs while preserving detection capability through frequency-based differentiation
3Object-affected harmful factors
If the electromagnetic energies for power delivery are reduced to be safe for smart cards, then smart card safety is improved, but power delivery capability deteriorates
Solution Approach 1:
The system employs periodic action by alternating between power delivery mode and detection mode. During power delivery, high energy is transmitted; during detection phases, the coil operates at different frequencies to detect smart cards. This temporal separation allows full power capability when needed while ensuring safety during detection, resolving the contradiction between power delivery and smart card safety
Solution Approach 2:
The control unit changes operational parameters (frequency and energy level) of the coil based on the intended function. For power delivery, the coil operates at high power; for detection, it switches to detection frequencies with appropriate energy levels. This dynamic parameter adjustment enables both high power capability and smart card safety at different times
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 effective detection of smart cards using the same coil, preventing damage from excessive electromagnetic energies and reducing costs by eliminating the need for additional card readers, while allowing for the detection of various smart card standards using different resonant frequencies.
Implementation Method 1
the power supply terminal has a driver circuit which drives the supplying-end coil to generate resonance, to deliver radio frequency electromagnetic waves
Implementation Method 2
the coil in the power receiving terminal receives the energies of the electromagnetic waves and then performs electronic conversion
Implementation Method 3
employing a second driver to control the coil for sending detection signals, allowing for the detection of smart cards through resonance
Implementation Method 4
The signal detector, coupled to the supplying-end coil, is used for detecting a reflection signal corresponding to the detection signal
Data Source
AI summary
A supplying-end module for an induction type power supply system includes a supplying-end coil, a first driver, a second driver and a signal detector. The first driver, coupled to the supplying-end coil, is used for driving the supplying-end coil to send electric power. The second driver, coupled to the supplying-end coil, is used for controlling the supplying-end coil to output a detection signal. The signal detector, coupled to the supplying-end coil, is used for detecting a reflection signal corresponding to the detection signal.