RFID Reader Power Control for Game Chip Detection
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Solution Overview
Problem
Existing game devices struggle to accurately identify game media placed at laying positions due to the diffusion of electromagnetic waves, leading to erroneous detection of adjacent chips and failure to read information from stacked chips.
Innovation Solution
A game device with a controller that adjusts the output power of electromagnetic waves from readers to prevent duplex detection, using a storage unit to collate data from multiple readers and determine the precise placement, number, and type of game media by varying the power level of the waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output power of electromagnetic waves from readers is increased to ensure detection of game media, then detection reliability is improved, but erroneous detection of adjacent game media occurs due to wave diffusion
Solution Approach 1:
The system dynamically adjusts the output power of electromagnetic waves from each reader based on the detection status of adjacent readers. When a reader successfully detects game media, the system reduces the power of adjacent readers to prevent wave diffusion interference, thereby maintaining both detection reliability and position identification precision
Solution Approach 2:
The system implements a feedback mechanism where detection results from each reader are used to control the output power of adjacent readers. The controller receives detection status information and adjusts electromagnetic wave power levels accordingly, creating a closed-loop control system that prevents erroneous detection while maintaining reliable detection
2Measurement precision
If the output power of electromagnetic waves is decreased to prevent detection of adjacent game media, then position identification precision is improved, but detection reliability deteriorates due to inability to read stacked chips
Solution Approach 1:
The system dynamically adjusts the output power of electromagnetic waves from each reader based on the detection status of adjacent readers. When a reader successfully detects game media, the system reduces the power of adjacent readers to prevent wave diffusion interference, thereby maintaining both detection reliability and position identification precision
Solution Approach 2:
The system implements a feedback mechanism where detection results from each reader are used to control the output power of adjacent readers. The controller receives detection status information and adjusts electromagnetic wave power levels accordingly, creating a closed-loop control system that prevents erroneous detection while maintaining reliable detection
3Area of stationary object
If multiple readers are used to cover all laying positions, then detection coverage is improved, but data collation complexity increases due to overlapping detection zones
Solution Approach 1:
The system uses feedback from detection results to determine which readers have successfully detected game media. The controller selectively controls adjacent readers based on this feedback, allowing multiple readers to operate simultaneously without requiring complex collation of all reader data, thus reducing system complexity while maintaining full coverage
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 identification of game media at laying positions, preventing erroneous detection and ensuring precise reading of information from game chips, even when multiple chips are stacked, by controlling the power level of electromagnetic waves.
Implementation Method 1
a reader that reads identification information from the game medium placed at the laying position by radiating a predetermined electromagnetic wave
Implementation Method 2
the waves (specifically magnetic flux) diffuse along concentric circles according to Ampere's corkscrew rule
Data Source
AI summary
A plurality of readers (antennas ANT1 through ANT3) that are each disposed at each of a plurality of laying positions (betting positions) provided on a game table 2 and are used to read the identification information (RFID) from game media (game chips Pa through Pi) placed at any of the laying positions (betting positions), controller (an antenna controller 4) that performs the process of reading the identification information from the game medium by individually driving and controlling the readers and causing predetermined electromagnetic waves radiated from the readers in the direction passing through the laying position while changing the power level thereof, storage unit (antenna controller) that stores the identification information that has been read as the data of each reader while relating the data to the power level of the electromagnetic wave, and collating unit (antenna controller) that identifies the game medium by using the data of the different readers stored in the storage unit in order to collate the data of the adjoining readers with each other.