IC Card Reader Metal Detection Mechanism for Orientation Verification
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Solution Overview
Problem
Existing IC card readers face challenges in accurately determining the correct posture of IC cards with external connection terminals, especially when the cards are inserted in directions other than the standard orientation, due to variations in terminal sizes and low sensitivity of metal detection mechanisms, leading to incorrect detection and processing issues.
Innovation Solution
A card reader design that incorporates a metal detection mechanism and a tip end detection mechanism, where the metal detection mechanism detects the external connection terminal before the tip end, and calculates an integrated value of metal detection signal values over time to determine the correct posture of the card, even when the card is inserted in non-standard orientations or with low reactive cards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a metal detection mechanism is used to detect the external connection terminal, then the detection capability is improved, but the sensitivity is insufficient for low reactive cards
Solution Approach 1:
The patent performs preliminary actions by acquiring metal detection signal values at multiple time points before final determination, calculating integrated values in advance, and using these pre-computed values for posture determination. This allows the system to accumulate sufficient detection data even for low reactive cards, improving both detection capability and reliability.
Solution Approach 2:
The patent changes the parameter of signal integration by computing integrated values from multiple acquisition cycles rather than relying on single-point detection. This parameter transformation amplifies weak signals from low reactive cards, enhancing detection sensitivity while maintaining measurement precision.
2Measurement precision
If the metal detection mechanism detects the external connection terminal, then the detection accuracy is improved, but the card posture determination becomes unreliable when cards are inserted in non-standard orientations
Solution Approach 1:
The system performs preliminary detection of the external connection terminal's position and uses this information to dynamically adjust the detection strategy. By acquiring signal values at multiple time points and calculating integrated values beforehand, the system can reliably determine card posture even when inserted in non-standard orientations.
Solution Approach 2:
The patent implements feedback by continuously monitoring metal detection signal values at multiple time points, comparing integrated values against threshold criteria, and using this feedback information to determine card posture. This feedback mechanism enhances both detection accuracy and posture determination reliability across various insertion orientations.
3Reliability
If multiple metal detection signal values are acquired over time, then the integrated value calculation improves detection reliability, but the detection time increases
Solution Approach 1:
The patent applies partial action by acquiring metal detection signal values at selectively determined time points rather than continuously monitoring. The system calculates integrated values from these partial measurements, achieving sufficient detection reliability without the time cost of exhaustive sampling.
Solution Approach 2:
The system performs preliminary acquisition of metal detection signal values at optimized time points before final posture determination. This preliminary sampling approach, combined with integrated value calculation, achieves reliable detection while minimizing the total detection time required.
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 and processing of IC cards in both standard and non-standard orientations, improving the reliability of card insertion detection and reducing errors caused by low sensitivity or varying signal levels, ensuring correct posture determination.
Implementation Method 1
a metal detection mechanism which is provided in the card insertion part and is structured to detect an external connection terminal of the IC chip
Data Source
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AI summary
Provided is a card reader being capable of easily determining whether or not the orientation of the inserted IC card is correct. This card reader comprises: an insertion port (3) wherein a card (2) having a built-in IC chip is inserted; a metal detection mechanism (10) for detecting an external connection terminal (2C) of the IC chip formed in the card (2); and a tip detection mechanism (11) for detecting the tip, in the insertion direction, of the card (2) inserted from the insertion port (3). In this card reader (1), the metal detection mechanism (10) and the tip detection mechanism (11) detects the tip, in the insertion direction, of the card (2) inserted in the correct orientation from the insertion port (3), the metal detection mechanism (10) is arranged at a position that detects the external connection terminal (2c).