Payment Terminal ESD Test Standardization
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Solution Overview
Problem
There is no standard test procedure for measuring the electrostatic discharge (ESD) resistance levels of Point of Sale (POS) payment terminals, which can lead to temporary or permanent damage due to increased metal-based components in payment devices.
Innovation Solution
A system and method using test equipment and procedures to measure the peak discharge current and energy levels of payment terminals under simulated conditions, including normal insertion, charge buildup through user activity, and incremental voltage testing to determine the terminal's ESD susceptibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal-based components are added to payment devices to enhance security features, then the security and functionality of payment devices are improved, but the susceptibility to electrostatic discharge damage increases
Solution Approach 1:
The patent applies preliminary anti-action by implementing ESD protection circuits and design considerations before the actual ESD event occurs. The system proactively addresses potential ESD damage through preventive measures in the circuit design, such as incorporating protective components and grounding pathways that neutralize electrostatic threats before they can cause harm to the payment terminal or payment device.
2Reliability
If standard test procedures are implemented for ESD resistance measurement, then the reliability of payment terminals can be defined and improved, but currently no such standard exists leading to unmeasured vulnerability
Solution Approach 1:
The patent replaces complex manual ESD testing procedures with an automated measurement system that uses a current transducer and oscilloscope to automatically detect and quantify ESD events. This substitution transforms the difficult mechanical process of manual ESD testing into an automated electrical measurement system that can precisely measure peak current, rise time, and energy parameters without requiring complex manual intervention.
3Measurement precision
If ESD testing is performed to measure peak discharge current and energy levels, then the ESD susceptibility of payment terminals can be characterized, but without such testing the vulnerability remains unknown
Solution Approach 1:
The patent segments the ESD measurement process into distinct, manageable components: a current transducer for detecting discharge current, an oscilloscope for measuring temporal characteristics, and a structured test procedure that applies controlled ESD events. This segmentation allows each component to be optimized independently and simplifies the overall measurement system, making it possible to characterize ESD susceptibility through standardized, repeatable tests.
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
Provides a standardized method to define ESD resistance levels of payment terminals, helping to prevent damage from electrostatic discharges and ensuring reliable transaction operations.
Implementation Method 1
ESD (Electrostatic Discharge) relates to sudden and momentary electric current that flows between two objects at different electrical potentials and is caused by direct contact or is induced by an electrostatic field.
Data Source
AI summary
Systems and methods for performing test procedures for measuring and defining the sensitivity of payment terminals to ESD (electrostatic discharge) are disclosed. In some embodiments, a plurality of test equipment in a controlled environment are used to measure the peak discharge current (Ip) when a payment device is inserted into a payment terminal during several simulated conditions. Energy levels of the discharge currents are calculated using an energy calculation program. One or more reference current and energy levels are determined.