RFID Verification Using Weight and Optical Feedback
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Solution Overview
Problem
Existing RFID systems lack feedback mechanisms to verify if all items within the read zone have been effectively read, leading to potential errors in identification and tracking processes.
Innovation Solution
Combining an RFID reader with a weigh scale and/or optical reader to provide verification by comparing calculated item weights or counts, using either RFID tag data or image recognition, to ensure accurate reading operations and notify operators of discrepancies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RFID reader is used to read items in a read zone, then reading speed and automation are improved, but reliability of item identification is worsened due to lack of verification feedback
Solution Approach 1:
The patent implements feedback mechanisms by integrating weigh scales and optical readers with RFID readers. The weigh scale provides weight feedback to verify if the total weight of read items matches expected values, while the optical reader provides visual feedback by displaying images of read items. This feedback loop allows the system to detect and alert operators when items are missed or misidentified, thereby maintaining high reading speed while improving identification reliability.
2Reliability
If verification mechanisms (weigh scale and optical reader) are added to RFID system, then reliability of item identification is improved, but device complexity is worsened
Solution Approach 1:
The patent merges multiple verification functions into an integrated system. The weigh scale and optical reader are combined with the RFID reader in a single apparatus, allowing simultaneous weight-based verification and visual confirmation. This merging approach improves reliability through multiple verification methods while managing device complexity by consolidating functions into one unified system rather than separate standalone devices.
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
Enhances the reliability of RFID systems by providing real-time feedback and verification, reducing errors in item identification and tracking through integrated weight measurement and optical scanning methods.
Implementation Method 1
RFID technology uses electromagnetic energy as a medium through which to send information
Implementation Method 2
input from the weigh scale is used to verify item identification by measuring a total weight of all the items
Implementation Method 3
verification is provided by an imaging system that uses image recognition and/or optical code scanning to identify number of items
Data Source
AI summary
A system and method for reading multiple items bearing electronic tags, such as radio frequency identification (RFID) tags, disposed in a read zone wherein a correlation scheme/system, separate (e.g. non-RF) from the electronic reader, is provided for verifying that all the items in the read zone have been successfully read. Typically, the user/operator is then notified whether or not all the items detected by the verification system have been successfully read by the electronic reader.