Gaming Chip RFID Verification With Image-Based Fault Localization
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Solution Overview
Problem
Existing RFID-equipped gaming chips in casinos face challenges in identifying specific chips with faulty RFID tags or counterfeit issues when read simultaneously, as current systems struggle to differentiate between normal and problematic chips accurately.
Innovation Solution
A management system utilizing an image capturing device, reading device, and image analysis device to capture and analyze gaming chips with built-in RFID tags and surface information, enabling the control device to identify problematic chips by comparing RFID and surface information, and a housing unit to accommodate and align chips for efficient inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RFID tags of multiple gaming chips are read simultaneously, then inspection efficiency is improved, but the ability to identify specific problematic chips deteriorates
Solution Approach 1:
The system segments the identification process into two distinct stages: first, simultaneous RFID reading of multiple chips for efficient screening, and second, individual visual inspection of only those chips that fail the RFID check. This segmentation allows the system to maintain high overall efficiency while ensuring accurate identification of problematic chips.
Solution Approach 2:
The system introduces an intermediary verification mechanism using visual inspection as a secondary check. When RFID reading fails to provide sufficient identification confidence, the system activates visual inspection of the chip surface as an intermediary step to confirm the chip's authenticity and condition, thereby resolving the identification ambiguity.
2Measurement precision
If gaming chips are inspected one by one, then identification accuracy is improved, but inspection time increases significantly
Solution Approach 1:
The system applies partial inspection rather than complete inspection of all chips. By using RFID reading to screen all chips simultaneously and then performing visual inspection only on those that fail the RFID check, the system performs exactly the amount of detailed inspection needed, avoiding unnecessary time expenditure on already-verified chips.
Solution Approach 2:
The system performs preliminary RFID reading on all chips before conducting any visual inspection. This preliminary action filters out the majority of chips that are already verified through RFID, so that subsequent visual inspection is needed only for a small subset of potentially problematic chips, significantly reducing total inspection time.
3Adaptability or versatility
If RFID reading is performed in chip tray or on table, then practical usage conditions are maintained, but reading reliability deteriorates due to interference
Solution Approach 1:
The system uses visual inspection as an intermediary verification method to compensate for unreliable RFID reading in practical usage conditions. When RFID reading is performed in chip trays or on tables where interference may occur, the system activates visual inspection as a backup mechanism to verify chip authenticity, ensuring reliable identification despite reading conditions.
4Measurement precision
If visual inspection is performed on all chips, then identification accuracy is improved, but processing time increases
Solution Approach 1:
The system performs visual inspection only partially, applying it exclusively to chips that fail the RFID reading check rather than inspecting all chips visually. This partial application of visual inspection maintains high identification accuracy for problematic chips while avoiding the time penalty of inspecting every chip with the slower visual method.
Solution Approach 2:
The system performs preliminary RFID reading on all chips before conducting visual inspection. This preliminary filtering action ensures that visual inspection is applied only to the small subset of chips that require it, thereby maintaining high processing speed while ensuring accurate identification of problematic chips.
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 effectively identifies and locates gaming chips with fraudulent or damaged RFID tags or notations by synchronizing RFID reading with image analysis, reducing time-consuming individual inspections and enhancing accuracy in chip management.
Implementation Method 1
a reading device configured to read the RFID tags of the plurality of gaming chips to obtain first information of the plurality of gaming chips
Implementation Method 2
an image capturing device configured to capture a plurality of gaming chips having a built-in RFID tag storing first information and having second information written on a surface thereof to generate an image
Data Source
AI summary
A management system includes a camera configured to capture an image of a plurality of gaming chips having an RFID tag storing first information and having second information written on a surface thereof; a reading device configured to read the first information from the RFID tags of the plurality of gaming chips; an image analysis unit configured to obtain, based on the image, a location of each of the plurality of gaming chips and the second information; and a comparison and judgment unit configured to identify a location of a problem gaming chip, by comparing the first information obtained by the reading device with the second information obtained by the image analysis unit.