Wireless Tag Detection Using Signal Strength Distance Calculation
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Solution Overview
Problem
Existing RFID systems face difficulties in efficiently and promptly locating a specific article among many, as they rely on determining the presence of wireless tags and detecting radio wave strength, which is not sufficient for quick identification.
Innovation Solution
A wireless tag detection apparatus comprising a transmission section for sending query signals, a reception section for receiving response signals, and a controller to determine the distance of the target tag based on signal strength, using a GUI and sound indicators to assist in locating the tag efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RFID reader determines presence of wireless tag by power value of reception signal, then wireless tag detection is achieved, but specific article cannot be efficiently located among many articles
Solution Approach 1:
The patent changes the parameter used for tag identification from simple presence detection (power value threshold) to distance-based identification. By calculating distance from signal strength and using this distance information to guide the reader, the system can efficiently locate specific articles among many, resolving the contradiction between detection accuracy and location efficiency
Solution Approach 2:
The patent implements feedback by displaying detected tag information and distance to the user, and using this information to guide subsequent detection. The system provides continuous feedback about tag presence and distance, enabling efficient navigation to target articles while maintaining accurate detection
2Measurement precision
If RFID system detects strength of radio wave received by wireless tag, then signal quality is measured, but specific article identification remains difficult among numerous articles
Solution Approach 1:
The patent transforms signal strength measurements into distance information through parameter conversion. By changing the parameter representation from raw signal strength to calculated distance, the system enables efficient article location while preserving accurate signal measurement capabilities
Solution Approach 2:
The patent adds a spatial dimension to tag detection by calculating and utilizing distance information. This dimensional transformation from simple signal detection to spatially-aware detection enables efficient article retrieval among numerous articles while maintaining measurement precision
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 efficient and prompt identification of a specific article by visually and audibly indicating the distance and proximity to the target wireless tag, facilitating quick retrieval.
Implementation Method 1
a transmission section which transmits query signals to one or more wireless tags via radio communication
Implementation Method 2
a reception section which receives one or more response signals transmitted via radio communication from the one or more wireless tags
Implementation Method 3
a controller which informs a distance to a wireless tag to be retrieved according to strength of a response signal from the wireless tag to be retrieved
Data Source
AI summary
Query signals to one or more wireless tags are transmitted via radio communication, and a distance to a wireless tag to be retrieved is informed according to strength of a response signal from the wireless tag to be retrieved, which is included in the response signals transmitted from the one or more wireless tags via radio communication.