RF SIM Card Magnetic Induction Activation
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Solution Overview
Problem
RF SIM cards consume excessive power from mobile terminals, affecting standby time, and require tedious calibration for optimal communication range, which limits their application due to variability across different mobile devices.
Innovation Solution
Incorporating a magnetic induction module in the RF SIM card and a magnetic field generation module in the RF card reader to activate the transceiver module only when the card is near the reader, reducing power consumption and eliminating the need for device-specific calibration through adjustable threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the RF SIM card periodically queries for RF exchange data to reduce power consumption, then power consumption is reduced to a certain level, but the RF transceiver module and microcontroller are still activated during interrogations even when no data exchange is needed, significantly affecting standby time
Solution Approach 1:
The patent replaces the traditional periodic query mechanism (electronic/software-based) with a magnetic field detection mechanism. The magnetic induction module detects magnetic field changes to trigger RF transceiver activation, substituting continuous electronic polling with passive magnetic field sensing that consumes minimal power until actually needed.
Solution Approach 2:
The magnetic induction module is pre-configured to detect magnetic field changes before RF communication is initiated. This preliminary detection mechanism prepares the system for upcoming data exchange needs without requiring continuous active monitoring, allowing the RF transceiver to remain dormant until genuinely needed.
2Measurement precision
If the communication range is controlled to within a very small range to avoid unintentional reading and erroneous reading, then reading accuracy is improved, but the RF SIM card requires different wireless transceiving powers for different mobile communication terminals, requiring tedious calibration
Solution Approach 1:
The magnetic induction module serves as an intermediary mechanism that mediates between the RF SIM card and the magnetic field generation module in the card reader. By using magnetic field detection as the triggering mechanism, the system achieves precise communication range control without requiring calibration of RF transceiving power, as the magnetic field presence inherently indicates proximity and readiness for communication.
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 significantly reduces power consumption with minimal impact on standby time and ensures consistent communication range across various mobile devices, enhancing the usability and applicability of RF SIM cards.
Implementation Method 1
a magnetic induction module, said magnetic induction module being electrically connected to the first RF transceiver module; when the magnetic induction module does not receive a matching magnetic field signal, the first RF transceiver module and the first microcontroller are both in a dormant state; when the magnetic induction module receives a magnetic field signal generated by the magnetic field generation module, the received magnetic field signal is converted to an electrical signal to activate the first RF transceiver module
Data Source
Figure 1~2
Figure 3
AI summary
The present invention involves an RF SIM card, an RF card Reader, and magnetic induction control methods in RF Communication. The RF SIM card includes a SIM card core, a first RF transceiver module, a first RF antenna and a first microcontroller, and a magnetic induction module. When the magnetic induction module does not receive a matching magnetic field signal, the first RF transceiver module and the first microcontroller are both in a dormant state. When the magnetic induction module receives a magnetic field signal generated by the magnetic field generation module, the received magnetic field signal is converted to an electrical signal to activate the first RF transceiver module. The first RF transceiver module subsequently examines whether an RF modulation signal exists to determine whether to generate an external interruption to wake up the first microcontroller, and further enters a normal working state to exchange data with the RF card reader. The present invention greatly reduces the power consumption of the SIM card, and effectively controls the RF communication range and avoids read error and unintended reading.