RFID Tag Communication Device Beam Control
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Solution Overview
Problem
Existing tag communication devices struggle to maintain an optimal communication region due to changes in antenna installation or peripheral environments, lacking the ability to correct the communication region effectively.
Innovation Solution
A tag communication device that receives identification information from both a first RFID tag within the desired communication region and a second RFID tag outside this region, using this information to control the radio beam's direction and power to ensure communication with the first tag while avoiding the second tag, thereby maintaining an optimal communication region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radio beam direction is fixed after initial setup, then the device structure is simple, but the communication region cannot be corrected when environment changes
Solution Approach 1:
The system uses feedback from RFID tags (first tag in communication region, second tag outside communication region) to detect changes in the communication region. Based on this feedback, the control means adjusts the radio beam direction to maintain the optimal communication region, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The system performs self-correction of the communication region by automatically detecting changes through RFID tags and adjusting the radio beam direction without requiring external intervention. This maintains adaptability while keeping the overall system structure relatively simple.
2Area of stationary object
If the radio beam covers a larger area, then the communication region is enlarged, but communication collision occurs more frequently
Solution Approach 1:
The system concentrates the radio beam energy into a focused directional beam rather than spreading it over a large area. This creates a localized communication region with high signal strength, preventing communication collisions while maintaining sufficient coverage for the intended communication area.
Solution Approach 2:
The radio beam direction is dynamically adjustable through the control means, allowing the system to optimize the communication region size and position based on environmental conditions and RFID tag feedback, thereby balancing coverage area with communication reliability.
3Adaptability or versatility
If the radio beam direction changes frequently to adapt to environment, then the communication region is optimized, but the control complexity increases
Solution Approach 1:
The control means uses feedback information from RFID tags to determine when and how much to adjust the radio beam direction. This feedback-based control optimizes the communication region while avoiding unnecessary adjustments, thereby managing control complexity effectively.
Solution Approach 2:
The system performs preliminary detection of the communication region using RFID tags before making adjustments to the radio beam direction. This preliminary action allows for planned, deliberate corrections rather than frequent reactive adjustments, reducing overall control complexity.
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 solution secures an optimal communication region even when the antenna installation or peripheral environments change, ensuring reliable communication by adjusting the radio beam's direction and power based on identification information from multiple RFID tags.
Implementation Method 1
A tag communication device that wirelessly communicates with an RFID tag by emitting a radio beam from an antenna
Data Source
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AI summary
It is possible to provide a tag communication device, a tag communication system, and a tag communication method which can secure an optimal communication region even when an antenna installation environment or a peripheral environment changes. A tag A is arranged in a preset communication region while a tag B is arranged outside the communication region. A reader/writer (3) repeatedly scans a radio beam M emitted from a scan antenna (4) and then controls the radio beam so that all the tags A can be read while no tag B can be read according to the ID which has been read.