RFID Tag Positioning via Dual-Power Signal Segmentation
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Solution Overview
Problem
Current RFID systems face challenges in accurately controlling the scanning area, leading to miss-reading and error-reading issues due to difficulties in separating target and non-target RFID tags, which hinders large-scale deployment and use.
Innovation Solution
A method that involves acquiring a first and second response signal from RFID tags using radio frequency signals of different powers, where the second response signal is used for positioning and the first response signal for communication, effectively separating the positioning and communication operations to improve accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reading power is increased to ensure target tag reading, then reading reliability improves, but non-target tag error-reading increases
Solution Approach 1:
The patent segments the RFID system into two independent subsystems: a positioning subsystem that uses low-power signals to determine tag locations, and a communication subsystem that uses high-power signals to read target tags. This segmentation allows the system to first identify which tags are within the target area through positioning, then selectively communicate with only those tagged, thereby preventing error-reading of non-target tags while maintaining reliable communication with intended tags.
2Object-affected harmful factors
If reading power is decreased to avoid non-target tag reading, then error-reading reduces, but target tag miss-reading increases
Solution Approach 1:
The patent implements preliminary positioning action before communication. The system first transmits low-power positioning signals to all potential tags and determines their locations in advance. Based on this preliminary positioning information, the system identifies which tags are within the target area and should be read. Only then does the system activate high-power communication signals directed at the identified target tags. This preliminary action ensures that no target tags are missed while avoiding error-reading of non-target tags.
3Device complexity
If single radio frequency signal is used for both positioning and communication, then system complexity is reduced, but positioning precision and communication quality deteriorate
Solution Approach 1:
The patent divides the RFID system into two functionally independent subsystems: a positioning subsystem dedicated to determining tag locations with high precision, and a communication subsystem dedicated to reading and writing tag data with high reliability. The positioning subsystem uses low-power signals optimized for accurate location detection, while the communication subsystem uses high-power signals optimized for data transmission. This functional segmentation allows each subsystem to be optimized for its specific purpose, achieving both high positioning precision and high communication quality, albeit with increased system complexity.
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 quality and efficiency of RFID communication by accurately positioning RFID tags and avoiding miss-reading and error-reading, facilitating the large-scale deployment and use of RFID systems.
Implementation Method 1
acquiring a first response signal and a second response signal which are corresponding to a radio frequency tag, wherein the first response signal and the second response signal are respectively generated by the radio frequency tag responding to radio frequency signals of different powers
Data Source
AI summary
A radio frequency communication method, a vehicle control method, a device, and a system are provided. The radio frequency communication method includes: acquiring a first response signal and a second response signal which are corresponding to a radio frequency tag, wherein the first response signal and the second response signal are respectively generated by the radio frequency tag responding to radio frequency signals of different powers; determining, based on the second response signal, positioning information of the radio frequency tag; and establishing, based on the positioning information and the first response signal, a communication connection to the radio frequency tag.