RFID System Reception Level Visualization for Positioning
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Solution Overview
Problem
In ultra-high frequency (UHF) band RFID systems, adjusting the installation positions of multiple readers/writers to optimize communication range and accuracy is challenging, as existing technologies do not provide effective methods for determining suitable positions based on reception levels from RF tags.
Innovation Solution
An RFID system that includes a display device, a first communication device, and a second communication device, which communicate with RF tags in a non-contact manner, repetitively output communication signals, measure reception levels, and generate chronological data to display graphs showing reception level transitions, allowing users to adjust installation positions for improved communication accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple readers/writers are installed in an RFID system, then the communication coverage and reading capability are improved, but the difficulty of adjusting installation positions to optimize communication accuracy increases
Solution Approach 1:
The system measures reception levels from RF tags at multiple positions and displays this information to provide feedback for adjusting reader/writer installation positions. The display shows reception level data that enables operators to optimize communication accuracy by positioning readers based on actual measurement results.
Solution Approach 2:
The system creates a visual representation (graph) of reception level data obtained from actual measurements. This graphical copy of the measurement data allows operators to analyze communication quality without physically moving readers, enabling position optimization through analysis of the copied information.
2Ease of manufacture
If readers/writers are installed at fixed positions, then the system setup is simplified, but the communication accuracy and reading reliability deteriorate
Solution Approach 1:
The system enables dynamic adjustment of reader/writer positions by providing measurement data and display functions. Instead of fixed installation, operators can adjust positions based on real-time reception level measurements, transforming the system from static to dynamic for optimized performance.
Solution Approach 2:
By displaying reception level measurements, the system provides feedback that enables iterative adjustment of reader positions. This feedback loop allows operators to optimize communication accuracy by positioning readers based on actual measurement results rather than relying on fixed installation only.
3Measurement precision
If reception level measurements are taken at multiple positions and times, then the accuracy of determining suitable installation positions is improved, but the measurement time and data processing complexity increase
Solution Approach 1:
The system adds a temporal dimension to position measurements by collecting reception level data at multiple time points. This enables analysis of communication quality changes over time and space, providing comprehensive insights for optimal reader positioning while managing measurement complexity through structured data collection.
Solution Approach 2:
The system creates graphical representations of reception level data collected at multiple positions and times. This visual copy of the measurement data simplifies analysis by transforming complex multi-dimensional data into intuitive graphs that can be quickly interpreted to determine suitable installation positions.
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
Enables users to find suitable installation positions for communication devices by visualizing reception level transitions, thereby enhancing communication accuracy and efficiency in reading RF tags.
Implementation Method 1
a first communication device (100A) which communicates with a first radio frequency (RF) tag (500A), which moves, in a non-contact manner, and a second communication device (100B) which communicates with the first RF tag (500A) in a non-contact manner
Data Source
AI summary
The disclosure supports installation of a plurality of communication devices at suitable positions. An RFID system stores first chronological data representing a reception level of a signal at a first communication device and second chronological data representing a reception level of a signal at a second communication device in a measurement period. The system specifies a higher reception level of the reception levels at the first and second communication devices corresponding to an elapsed time from a start time of the measurement period in the first and second chronological data at every elapsed time from the start time and generates third chronological data representing the specified reception level. The system selectively displays at least one of an image based on the first chronological data, an image based on the second chronological data, and an image based on the third chronological data, or display these images at the same time.