RFID Reader Device with LED Feedback for Installation Testing
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Solution Overview
Problem
In RFID systems using the UHF band, there is a challenge with efficiently performing installation tests due to the long interaction distance, which can lead to erroneous reading of unwanted tags, and the inefficiency of manually adjusting the positional relationship between the reader/writer and the target tag, making it difficult for operators to simultaneously monitor and adjust positions.
Innovation Solution
A reader device with an interaction unit, identification determining unit, and output control unit that interacts with RFID tags at predetermined intervals, determines the tag's identification, and performs different outputs based on whether the interaction is with the intended tag or not, allowing operators to visually and audibly confirm successful interactions and adjust positions more efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the reader/writer interaction distance is extended to several meters using UHF band RFID technology, then the reading capability is improved, but erroneous reading of unwanted tags occurs
Solution Approach 1:
The patent implements a feedback mechanism where the reader device receives tag IDs from multiple RFID tags within its interaction range, compares them against a predetermined target tag ID, and provides visual feedback through LED indicators. The LED displays different patterns (e.g., green for successful match, red for mismatch) to indicate whether the interacted tag is the intended target or an unwanted tag, enabling operators to adjust positioning based on real-time feedback.
2Ease of operation
If manual positioning adjustment is performed while monitoring via PC, then the installation test can be conducted, but the operator cannot simultaneously monitor and adjust positions due to separated installation locations
Solution Approach 1:
The patent enables the reader device to autonomously perform the monitoring function that previously required external PC equipment. The reader device itself generates and displays visual indicators directly at the installation location, allowing operators to simultaneously observe interaction status and perform positioning adjustments without needing to return to a separate PC location, thus eliminating the time loss from repeated back-and-forth movements.
3Manufacturing precision
If the operator performs position adjustment while monitoring interaction status, then positioning can be optimized, but the operator may miss detecting interactions with unwanted tags
Solution Approach 1:
The patent utilizes color changes in LED indicators to convey different interaction states. The LED displays distinct colors or blinking patterns to indicate successful interaction with the target tag versus interaction with unwanted tags. This visual encoding allows operators to immediately recognize the type of interaction occurring, maintaining full awareness of interaction status even while actively engaged in positioning adjustments.
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 operators to perform installation tests more efficiently by providing visual and auditory feedback, ensuring stable interaction with the target tag and reducing the time and effort required for position adjustments, while preventing unwanted tag readings.
Implementation Method 1
an interaction unit configured to interact with an radio frequency identification (RFID) tag at predetermined time intervals using RFID technology
Data Source
AI summary
An operator is enabled to perform an installation test efficiently. A reader device includes an ID determining unit that specifies an ID code of an RFID tag which is an interaction partner when an interaction with the RFID tag succeeds and an output control unit that causes an LED to emit light in different colors when the ID code is the same as an ID code determined in a previous interaction or an ID code stored in advance in a storage unit and when the ID code is different from the ID code determined in a previous interaction or the ID code stored in advance in the storage unit.