RFID Tag Backscatter Code Combination for Inventory Speed
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Solution Overview
Problem
Existing RFID systems face inefficiencies in reading multiple codes from RFID tags, especially when there are many tags or the host items are moving, as they require separate commands for each code and limited time for reading.
Innovation Solution
RFID tags and chips capable of backscattering a combination of first and second codes without receiving intermediate commands, allowing for simultaneous reading of both codes without the need for separate commands, which can save time in inventorying and enable reading during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate reader commands are sent for reading each code from RFID tags, then each code can be read accurately, but the time required for inventorying increases significantly
Solution Approach 1:
The patent combines multiple code reading operations into a single reader command. The RFID tag is designed to backscatter a combination of first and second codes in response to one command, eliminating the need for separate commands for each code. This merging of operations directly reduces inventorying time while maintaining code reading accuracy.
Solution Approach 2:
The RFID tag prepares and stores multiple codes (first code and second code) in advance within its memory structure. When a single reader command is received, the tag can immediately backscatter the combination of codes without requiring additional command cycles, thus performing the data preparation action preliminarily to speed up the reading process.
2Device complexity
If separate commands are used for reading multiple codes, then command structure remains simple, but the number of communication cycles increases
Solution Approach 1:
The patent merges multiple code transmission operations into a single backscatter response. The RFID tag combines the first code and second code into one backscattered signal sequence, reducing the number of communication cycles from multiple separate exchanges to a single exchange, thereby improving productivity without significantly complicating the command structure.
Solution Approach 2:
The RFID tag is designed with multi-functionality to store and backscatter multiple types of codes (first code and second code) within a single communication response. This universal capability allows the tag to fulfill multiple data retrieval functions in one operation, increasing productivity while keeping the reader's command structure relatively simple.
3Use of energy by moving object
If RFID tags wait for separate commands for each code, then power consumption remains low, but reading speed decreases
Solution Approach 1:
The RFID tag preliminarily prepares multiple codes for transmission by storing them in memory in advance. When a single reader command is received, the tag can quickly backscatter the combination of codes without requiring multiple waiting periods for separate commands, thus improving reading speed while maintaining relatively low power consumption by avoiding extended active states.
Solution Approach 2:
The patent enables continuous useful action by allowing the RFID tag to backscatter multiple codes in an uninterrupted single operation. This eliminates the idle waiting time between separate command-response cycles, maintaining the tag in a productive state longer and improving overall data retrieval speed without proportionally increasing power consumption.
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 enhances the efficiency of reading RFID tags by eliminating the need for separate commands for each code, allowing for faster data retrieval and enabling the reading of tag codes during manufacturing, even when host items are moving.
Implementation Method 1
The tag generates the transmitted back RF wave either originally, or by reflecting back a portion of the interrogating RF wave in a process known as backscatter.
Data Source
AI summary
RFID reader systems, readers, components, software and methods for causing RFID tags to backscatter a combination made from at least portions of a first code and a second code stored in tag memory, without transmitting any commands in the interim. In a number of embodiments, therefore, a separate command does not have to be sent for also reading the second code, thereby saving time in inventorying the tags. Plus, the combination can enable reading tag codes during tag manufacturing that are not otherwise readily available to read in the field.