Label Printer RFID Tag Positioning via Intensity Tracking
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Solution Overview
Problem
In label printers, automatically determining the optimal communication position for RFID tags during simultaneous communication with multiple tags is challenging, as it is difficult to distinguish which communication value corresponds to which label, leading to potential errors in data writing and reading.
Innovation Solution
A label printer configuration that includes a conveying mechanism, an RFID reader and writer, a communication intensity information acquisition unit, a maximum communication intensity position determination unit, and an optimal communication position calculation unit, which acquires and analyzes communication intensity data to determine the optimal position for each RFID tag, ensuring accurate identification and data writing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RFID reader and writer communicates with multiple RFID tags simultaneously during automatic adjustment, then communication efficiency is improved, but it becomes difficult to determine which communication value corresponds to which label
Solution Approach 1:
The patent segments the communication process by dividing the label sheet into individual labels and tracking each label's communication values separately. By processing labels one at a time through the conveying mechanism, the system maintains clear correspondence between communication values and specific labels, eliminating the information loss that would occur with simultaneous multi-label communication.
Solution Approach 2:
The patent implements feedback mechanisms where the system monitors communication intensity values and uses this information to determine optimal communication positions. The feedback loop tracks which communication values correspond to which labels by observing the conveying process and matching communication intensity patterns with specific label positions, thereby resolving the correspondence ambiguity.
2Device complexity
If the RFID reader and writer is disposed upstream of the printing unit, then the structure is simplified, but accurate communication with RFID tags becomes difficult when multiple tags are present
Solution Approach 1:
The patent introduces dynamic positioning through the conveying mechanism that moves labels past the fixed RFID reader and writer. This dynamic approach allows the system to maintain simple fixed positioning of the reader/writer while achieving accurate communication by controlling the motion state and timing of communication with individual labels during their passage through the reading zone.
Solution Approach 2:
The patent performs preliminary actions by pre-positioning labels on the conveying mechanism and pre-establishing communication parameters before the actual communication occurs. The system prepares the conveying mechanism to present labels to the RFID reader/writer at optimal moments, ensuring accurate communication without requiring complex reader/writer positioning.
3Measurement precision
If automatic adjustment of optimal communication position is implemented, then communication accuracy is improved, but the process becomes complex when multiple tags communicate simultaneously
Solution Approach 1:
The patent extracts the automatic adjustment function from a complex simultaneous multi-tag processing system and applies it individually to each label during sequential processing. By handling one label at a time through the conveying mechanism, the system maintains communication accuracy for each label while significantly simplifying the overall adjustment process compared to managing multiple tags simultaneously.
Data Source
AI summary
According to an embodiment, there is provided a label printer including a conveying mechanism, an RFID reader and writer, a communication intensity information acquisition unit, and a maximum communication intensity position determination unit, and an optimal communication position calculation unit. If communication with the plurality of RFID tags occurs simultaneously in the RFID reader and writer while conveying the mount by the conveying mechanism along the conveying route, the communication intensity information acquisition unit acquires information indicating a communication intensity between each of a plurality of the RFID tags and the RFID reader and writer in correlation with identification information of each of the RFID tags. The maximum communication intensity position determination unit determines a maximum communication intensity position, at which a communication intensity capable of being correlated with the identification information of each of the RFID tags becomes the maximum, on the basis of a tendency of a variation in the communication intensity of each of the plurality of RFID tags which accompanies the conveyance along the conveying route, and a conveying distance of the mount by the conveying mechanism. The optimal communication position calculation unit calculates an optimal communication position with the RFID tags of the plurality of labels adhered to the label paper on the basis of the maximum communication intensity position determined with respect to each of the plurality of RFID tags.