RF Tag Reader Writer Communication Success Rate Determination
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Solution Overview
Problem
In RFID systems, accurately determining the communication state and identifying reading omissions among RF tags is challenging due to the reliance on a buzzer for confirmation, which is not reliable for assessing communication success.
Innovation Solution
An RF tag reader and writer with a reading omission determining unit that calculates communication success rates and determines the communication state by analyzing the acquisition of tag information within a predetermined time, using a communication success rate calculator and stability determining unit to assess the communication state and position of RF tags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a buzzer is used to indicate successful information acquisition from RF tags, then the user can receive immediate feedback, but the user cannot accurately determine the communication state or identify reading omissions
Solution Approach 1:
The patent implements a comprehensive feedback system that goes beyond simple buzzer alerts. The reading omission determination unit continuously monitors communication results and provides detailed feedback through both visual display (showing specific tags that failed to read) and audible signals. This multi-channel feedback mechanism enables users to accurately identify reading omissions while maintaining ease of operation.
Solution Approach 2:
The patent introduces a reading omission determination unit as an intermediary between the RF tag reading process and the user. This unit acts as a mediator that analyzes communication results, compares expected versus actual readings, and translates complex communication states into user-friendly indicators. It identifies specific tags that failed to communicate properly and presents this information through multiple channels (display and buzzer).
2Reliability
If the user manually checks each RF tag by moving the antenna and listening for buzzer sounds, then all tags can be verified, but the process is time-consuming and inefficient
Solution Approach 1:
The patent performs preliminary actions by automatically determining which RF tags have been successfully read and which have been omitted before the user completes the inventory process. The reading omission determination unit proactively identifies potential reading omissions by analyzing communication results in real-time, allowing users to address issues immediately rather than manually checking each tag afterward.
Solution Approach 2:
The system performs self-verification by automatically monitoring its own reading process. The reading omission determination unit independently analyzes communication results, compares them against expected outcomes, and identifies reading omissions without requiring manual intervention. This self-service capability maintains high reliability while preserving user productivity.
3Adaptability or versatility
If the reader and writer moves the antenna through a wide inventory range to read all RF tags, then more tags can be accessed, but the communication state becomes difficult to monitor accurately
Solution Approach 1:
The patent replaces manual mechanical monitoring (user listening for buzzer sounds while moving the antenna) with an automated electronic determination system. The reading omission determination unit uses electronic analysis of communication results to precisely identify reading omissions, substituting the imprecise mechanical feedback method with a sophisticated electronic assessment system that works effectively across the entire inventory range.
Data Source
AI summary
An RF tag reader and writer is provided which includes: a communication unit that communicates with one or more RF tags as an information acquisition target using an anti-collision method of avoiding a collision between signals and that performs an acquisition process of acquiring tag information which is information stored in the one or more RF tags; and a communication success rate calculator that calculates a communication success rate of the communication unit with the one or more RF tags on the basis of the number of times by which the communication unit successfully acquires the tag information from the one or more RF tags within a predetermined period and the number of times by which the communication unit performs a communication process with the one or more RF tags in a state where the collision between signals is avoided within the predetermined period.