Dual-Region RFID Tag Reader for POS Transaction Accuracy
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Solution Overview
Problem
Existing commodity sales data processing systems, such as POS terminals, face inefficiencies in collectively reading wireless tags due to the time required to write information indicating a sale on each tag during the transaction process.
Innovation Solution
A commodity sales data processing apparatus is designed with two regions and corresponding antennas to read and write information on RFID tags, allowing for initial collective reading and subsequent individual reading during bagging, with a sales finishing command written to tags during the bagging process to prevent redundant registration and ensure accurate transaction completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If information indicating sale is written in wireless tags during collective reading, then transaction accuracy is ensured, but reading time increases significantly
Solution Approach 1:
The patent divides the wireless tag processing into two separate phases: (1) collective reading phase where multiple tags are read simultaneously without writing, and (2) individual writing phase where sale information is written to each tag separately after collective reading completes. This segmentation eliminates the time conflict between reading and writing operations.
Solution Approach 2:
The system performs preliminary collective reading of all wireless tags before writing sale information. By completing the reading operation first and then performing writing operations in subsequent individual steps, the system ensures accurate transaction recording without extending the critical reading path.
2Productivity
If multiple wireless tags are collectively read simultaneously, then processing efficiency improves, but writing information to each tag becomes more time-consuming
Solution Approach 1:
The patent segments the tag processing workflow into distinct reading and writing phases. Multiple tags are read in parallel during the collective reading phase, while writing operations are performed individually in a separate phase, allowing efficient batch reading without writing time penalties.
Solution Approach 2:
The system performs the collective reading operation preliminarily before any writing operations. This preliminary action captures all tag information in a single efficient batch operation, and subsequent writing operations are performed on the already-read data without interfering with the reading efficiency.
3Ease of operation
If sale information is written during the reading process, then transaction completion is achieved, but redundant registrations may occur
Solution Approach 1:
The patent separates reading and writing operations into distinct phases to prevent redundant registrations. By completing all readings first and then performing writes in a controlled subsequent phase, the system ensures each tag is registered exactly once based on the collective reading results, eliminating the risk of duplicate registrations during the reading process.
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
This approach reduces the overall time required for reading wireless tags and ensures accurate transaction processing by writing sale information during the bagging phase, minimizing redundant registrations and enhancing operational efficiency.
Implementation Method 1
A first antenna is positioned to read information from a wireless tag on the article when the article is placed in the first region
Implementation Method 2
A second antenna is positioned to read information from the wireless tag on the article when the article is in the second region
Data Source
AI summary
A commodity sales data processing apparatus includes a registration unit a first antenna positioned to read information from a wireless tag in a first region in which an article is to be placed for registration in a sales transaction. A first tag reader sends article information read from the wireless tag in the first region to the registration unit. A second antenna is positioned to read information from the wireless tag a second region. A second tag reader is connected to second antenna and configured to send article information read from the wireless tag to the registration unit to register the article in the sale transaction, if not already registered, and transmit a sale finished command to the wireless tag when the article has already been registered in the transaction.