RFID Tag Reading Method with Sensor-Based Object Detection
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Solution Overview
Problem
RFID systems face issues with collecting accurate data in environments like fitting rooms, where unnecessary tag readings occur, leading to incorrect data storage, especially when store clerks enter and read tags alongside customer-commodity tags.
Innovation Solution
An RFID system with a sensor to detect specific objects and a control unit that stores specific tag data, preventing the transmission of duplicate or unnecessary data to a host apparatus by comparing read data with stored data, ensuring only unique data is transmitted to the server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the RFID reader continuously reads tag data in the communication area, then the system can detect all commodities including those tried on by customers, but unnecessary tag data from store clerks and other non-customer objects is also read and stored, reducing data accuracy
Solution Approach 1:
The system performs preliminary actions by detecting objects with a sensor before initiating RFID tag reading. This preliminary detection filters out non-customer objects (store clerks, etc.) before the RFID reader operates, preventing unnecessary data from being read in the first place. The sensor detection occurs ahead of time to establish which objects should have their tags read.
Solution Approach 2:
A sensor acts as an intermediary between the RFID reader and the objects in the communication area. The sensor detects objects and provides this information to the RFID reader, which then uses it to selectively read tags only from detected objects. This intermediary filtering mechanism prevents direct reading of all tags in the area, thereby improving data accuracy by excluding non-customer objects.
2Reliability
If the RFID reader reads tags of all objects in the communication area, then no data is missed, but time and energy are wasted reading and storing duplicate or irrelevant data
Solution Approach 1:
The system performs preliminary detection of objects using a sensor before the RFID reader operates. This preliminary action identifies which objects are present and relevant, allowing the RFID reader to focus only on those objects. This prevents wasted time reading tags from objects that shouldn't be read, while ensuring all relevant objects are still captured.
Solution Approach 2:
The system uses feedback from sensor detection to control the RFID reader's operation. The sensor provides real-time information about detected objects, and the RFID reader adjusts its reading behavior based on this feedback. This feedback loop ensures that reading operations are performed only when and where needed, eliminating unnecessary processing time while maintaining data completeness.
3Loss of information
If the system reads and stores all tag data without discrimination, then all possible information is captured, but the data management efficiency decreases due to processing and storing unnecessary duplicate data
Solution Approach 1:
The system extracts only the necessary information by using sensor detection to identify relevant objects before RFID tag reading. This extraction approach pulls out only the data that needs to be processed and stored, leaving unnecessary data behind. The sensor acts as a filter that extracts relevant object information, and the RFID reader then extracts tag data only from those filtered objects, improving data management efficiency while retaining all necessary information.
Solution Approach 2:
The sensor performs preliminary identification of relevant objects before the RFID reading process. This preliminary action pre-screens which objects should have their tags read, preventing the system from processing unnecessary data. By doing this filtering work in advance, the system maintains complete information about all objects while efficiently managing only the relevant subset, thereby improving productivity without losing information.
Data Source
AI summary
Tag data stored in a specific RFID tag is stored in a specific-data storing unit. Tag data is read from an RFID tag present in a communication area by an RFID reader through radio communication according to detection of a specific object by a sensor for detecting the object. When tag data same as the tag data stored in the specific-data storing unit is not included in the tag data read by the RFID reader, the read tag data is transmitted to a host apparatus.