RFID Tag Misrecognition Prevention in Gaming Chip Counting
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Solution Overview
Problem
In gaming establishments, the stochastic method for reading RFID tags often generates 'ghost chips' due to misrecognition of multiple tags as a single chip, leading to inaccurate counting and inefficiencies, particularly in crowded bet areas and chip trays, where existing RFID technologies struggle to provide precise and rapid identification without excessive computing resources.
Innovation Solution
A system and method utilizing RFID tags with memory storing intrinsic identification information and error detection codes, generated using different methods, to detect mismatches and prevent misrecognition, allowing for precise counting of chips without requiring significant computing power. This involves an antenna transmitting request signals, receiving answer-back signals with identification and error detection codes, and determining match or mismatch to identify misrecognized chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the stochastic method is used to read a large number of RFID tags quickly, then recognition speed is improved, but ghost chips are generated due to misrecognition of multiple tags as a single chip
Solution Approach 1:
The system transmits the same inquiry signal multiple times and compares the answer back signals received. By using feedback comparison of multiple readings, the system can identify and eliminate ghost chips while maintaining rapid recognition speed through parallel processing of multiple signals.
Solution Approach 2:
The system performs more readings than the minimum single reading would provide, transmitting inquiry signals multiple times and comparing results. This excessive action of multiple readings enables accurate distinction between real chips and ghost chips while maintaining overall fast processing through efficient comparison algorithms.
2Measurement precision
If the deterministic method is used to individually inquire RFID tags, then counting accuracy is improved, but recognition speed deteriorates
Solution Approach 1:
The system merges the advantages of both deterministic and stochastic methods by using stochastic inquiry signals to rapidly read multiple tags simultaneously, then applying deterministic comparison logic to verify results. This combination achieves both high-speed recognition and accurate counting without the limitations of either method alone.
Solution Approach 2:
The system segments the chip identification process into two phases: rapid stochastic inquiry phase for initial reading, and verification phase using comparison logic. This segmentation allows the system to maintain fast overall processing while ensuring accurate identification through targeted verification of potentially problematic readings.
3Measurement precision
If multiple error detection codes generated by different methods are used, then chip identification precision is improved, but device complexity increases
Solution Approach 1:
The system changes parameters of the inquiry signal across multiple transmissions, such as varying time slots or frequency characteristics. This parameter variation enables the same RFID tags to be read under different conditions, making ghost chip detection more reliable without requiring additional hardware complexity.
Solution Approach 2:
The system creates multiple copies of the inquiry signal and transmits them in sequence, then compares the answer back signals received. This copying approach allows verification of chip identities through comparison without requiring complex additional hardware, using software-based signal replication and comparison instead.
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
The system enables accurate and rapid counting of RFID-tagged chips, reducing the occurrence of ghost chips and improving precision, thus facilitating efficient chip management in gaming environments without the need for excessive computational resources.
Implementation Method 1
performing communication between a reader and the RFID tag by an electromagnetic wave
Data Source
AI summary
The present application provides a system which determines, when the same data is read for a predetermined consecutive number of times from the chip placed in the bet area, that reading of the bet area is successful, while determines, when the same data is not read for a predetermined consecutive number of times, that reading of the bet area is unsuccessful, and terminates a reading process for the bet area when it is determined by the determination unit that reading of the bet area is successful, or performs a reading process for the bet area when it is determined by the determination unit that reading of the bet area is unsuccessful.