Sound Wave Payment System Using Acoustic Magnetic Sensor
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Solution Overview
Problem
Existing short-range payment systems are limited to specific smartphone terminals, making it difficult to utilize offline infrastructures effectively, and current contactless communication methods are not universally compatible with all terminals.
Innovation Solution
A short-range payment system that uses sound communication to transmit and receive card information between a user terminal and an MST payment terminal, employing a magnetic field converter to generate a magnetic field from sound wave signals, enabling payment processing across various terminals without requiring specific hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sound communication is used to transmit card information, then compatibility with various terminals is improved, but security risks increase due to potential eavesdropping on sound waves
Solution Approach 1:
The patent introduces an acoustic magnetic sensor unit as an intermediary device that converts sound wave signals into magnetic field information. This mediator transforms the vulnerable sound communication into secure magnetic field transmission, allowing the system to maintain sound wave compatibility while achieving magnetic field security transmission standards
Solution Approach 2:
The patent replaces the acoustic communication channel with a magnetic field transmission mechanism. By substituting the sound wave-based mechanical/vibrational system with an electromagnetic field system, the patent eliminates the eavesdropping vulnerability of sound waves while preserving the ability to communicate with various terminals through the acoustic magnetic sensor
2Ease of operation
If contactless communication with MST terminals is enabled in all terminal types, then service accessibility is improved, but system complexity increases due to need for universal compatibility
Solution Approach 1:
The patent implements a universal acoustic magnetic sensor unit that can handle multiple communication protocols and terminal types through a single device interface. This multi-functional component enables the system to work with various MST terminals without requiring separate specialized hardware for each terminal type, thus improving accessibility while controlling complexity
3Ease of manufacture
If magnetic field generation is performed from sound wave signals, then hardware requirements are reduced, but conversion accuracy may be compromised
Solution Approach 1:
The acoustic magnetic sensor unit serves as a precision intermediary that accurately converts sound wave signals into magnetic field information. This specialized mediator component ensures high conversion accuracy by being specifically designed to handle the signal transformation process, thereby maintaining manufacturing precision while reducing overall hardware complexity
Solution Approach 2:
The patent transforms the signal parameters from acoustic domain (sound waves) to electromagnetic domain (magnetic fields) through the acoustic magnetic sensor. By changing the fundamental parameter domain and using specialized conversion technology, the system achieves accurate transformation while simplifying hardware requirements for direct magnetic field generation
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 allows for seamless data transmission and reception with MST payment terminals, enhancing payment convenience by enabling smartphone contactless communication with all existing card payment infrastructures, including MST-type credit card check terminals and POS devices, regardless of smartphone type.
Implementation Method 1
a converter speaker configured to output a sound wave signal
Implementation Method 2
a converter microphone configured to receive the card information sound wave signal
Implementation Method 3
a magnetic field converter configured to, when receiving the card information sound wave signal, extract the card information from the card information sound wave signal and generate a magnetic field that matches the extracted card information
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A short-range payment system according to an embodiment of the present invention may include: a user terminal configured to transmit and receive a card information sound wave signal, which is a sound wave signal including card information, during operation in payment mode; a magnetic field converter configured to, when receiving the card information sound wave signal, extract the card information from the card information sound wave signal and generate a magnetic field that matches the extracted card information; and an MST payment device configured to perform payment processing by using the magnetic field generated by the magnetic field converter.