RFID Gate Passage Detection Using RSSI and Flow Line Tracking
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Solution Overview
Problem
Existing RFID systems struggle to reliably determine whether an article has passed through a gate, as they cannot differentiate between tags that have merely approached or moved away from the gate without actually passing through, leading to incorrect determinations.
Innovation Solution
An information processing apparatus that combines flow line specification using sensors to track object movement and RSSI acquisition from RFID tags to accurately determine passage through a gate, utilizing patterns for starting and ending reading processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only RSSI magnitude is used to determine passage, then the system is simple to operate, but the determination reliability is low
Solution Approach 1:
The patent combines multiple detection methods (RSSI magnitude detection and flow line detection) into a unified passage determination system. The determination unit integrates results from both the RSSI acquisition unit and the flow line specification unit to make a comprehensive judgment, thereby improving reliability while maintaining operational simplicity through automated integration.
Solution Approach 2:
The determination unit acts as an intermediary that processes and integrates information from multiple sources (RSSI values and flow line data) to produce the final passage determination. This intermediary component协调s the different detection methods and resolves their combined information to achieve reliable passage detection.
2Measurement precision
If RSSI acquisition and flow line specification are combined, then passage determination accuracy improves, but the device complexity increases
Solution Approach 1:
The patent merges RSSI acquisition functionality and flow line specification functionality into a single integrated reading system. The determination unit combines both detection results to accurately judge passage, achieving high measurement precision through multi-parameter analysis while managing complexity through systematic integration.
Solution Approach 2:
The reading apparatus is designed with multi-functionality, capable of performing both RSSI acquisition and flow line specification operations. This universal device can execute multiple detection tasks and integrate their results, achieving accurate passage detection without requiring separate specialized systems for each function.
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
Enhances the reliability of managing article carrying-in or carrying-out by accurately distinguishing between actual passage and proximity, reducing erroneous determinations.
Implementation Method 1
various technologies using a radio frequency identifier (RFID) have been proposed
Implementation Method 2
it is determined whether an article with an RFID tag attached thereto has passed through a gate by using an RSSI (Received Signal Strength Indicator) of a signal transmitted from the tag
Data Source
AI summary
An information processing apparatus, a reading system, an information processing method, and a program capable of manage carrying-in or carrying-out of articles more reliably are provided.An information processing apparatus (1) includes a flow line specification unit (2) that specifies a flow line of a movement of an object in a predetermined area near a gate, an RSSI acquisition unit (3) that acquires an RSSI of a signal transmitted from an RFID tag located near the gate, and a passage determination unit (4) that determines whether or not an article specified by identification information read from the RFID tag has passed through the gate based on the specified flow line and the acquired RSSI.