Game Table RFID Reading System with Read-Restriction Antennas
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Solution Overview
Problem
In game table reading systems, the use of multiple reading antennas with a narrower range to determine the detailed position of game tokens on a game table leads to the issue of RFID tags being read beyond the intended range, causing interference between adjacent reading areas.
Innovation Solution
A game table reading system is implemented with a configuration that includes a game table with defined reading areas, multiple reading antennas installed for each area, read-restriction antennas to prevent cross-area reading, a reading control device to manage antenna reading sequences, and a read-restriction control device to synchronize read-restriction actions with the reading process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple reading antennas with narrower reading range are used to determine detailed position of game tokens, then measurement precision is improved, but reading interference occurs between adjacent reading areas
Solution Approach 1:
The game table is divided into multiple distinct reading areas, each with its own reading antenna. This segmentation allows precise positioning of game tokens within specific betting areas while the read-restriction antennas prevent electromagnetic interference between adjacent segments, resolving the contradiction between measurement precision and reading interference.
Solution Approach 2:
Read-restriction antennas are introduced as intermediary elements between adjacent reading areas. These antennas emit electromagnetic waves that actively prevent reading in neighboring areas, serving as a mediator that blocks interference while allowing the primary reading antenna to function with high precision in its designated area.
2Area of stationary object
If reading antennas are placed in close proximity to achieve detailed positioning, then area coverage is improved, but reading reliability deteriorates due to cross-reading of RFID tags
Solution Approach 1:
Read-restriction antennas perform preliminary anti-action by emitting electromagnetic waves that prevent RFID tags in adjacent areas from being read before the primary reading antenna can inadvertently read them. This pre-emptive measure ensures that even when antennas are placed in close proximity for comprehensive coverage, each reading operation remains reliable and accurate.
Solution Approach 2:
The system employs periodic activation of reading and read-restriction functions in a coordinated sequence. The reading control device and read-restriction control device alternately activate their respective antennas in synchronization, creating periodic cycles of reading and restriction that maintain both comprehensive coverage and high reading reliability across all areas.
3Reliability
If read-restriction antennas are activated to prevent cross-area reading, then reading reliability is improved, but device complexity increases
Solution Approach 1:
The reading control device and read-restriction control device are merged into a unified control system that coordinates all antenna operations. This integration manages the complexity by providing centralized control over the multiple antennas, ensuring they work together harmoniously to maintain high reading reliability while reducing overall system complexity through unified management.
Solution Approach 2:
The control devices are designed with multi-functionality, handling both reading and read-restriction operations across multiple areas. This universality reduces device complexity by eliminating the need for separate dedicated controllers for each function and area, as the same control devices manage multiple roles throughout the system.
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
This configuration effectively restricts reading in adjacent areas, allowing for accurate and separate reading of RFID tags in each area, even when reading areas are close to each other, thereby preventing interference and ensuring precise tracking of game tokens.
Implementation Method 1
a plurality of reading antennas installed in correspondence with each of the plurality of reading areas for reading the RFID tag embedded in the game token placed in the corresponding reading areas
Implementation Method 2
a read-restriction antenna installed in correspondence with each of the plurality of reading areas for restricting reading of an RFID tag embedded in the game token placed in the corresponding reading area by the reading antenna corresponding to other adjacent reading areas
Data Source
AI summary
The game table reading system comprises reading antennas for each of a plurality of reading areas of a game table, read-restriction antennas for each of the plurality of the reading areas, the read-restriction antennas restricting the RFID tag embedded in a game token placed in the corresponding reading area from being read by the reading antenna corresponding to the other adjacent reading areas, a reading control device that controls the reading antennas, and a read-restriction control device that controls the read-restriction antennas. The read-restriction control device causes the read-restriction antennas corresponding to the reading areas adjacent to the reading areas corresponding to the reading antenna that the reading control device causes to read, in synchronization with the reading control device.