Wireless Tag Flag State Control for Reading Efficiency
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Solution Overview
Problem
Existing wireless tag communication systems face inefficiencies in reading identification information from multiple wireless tags due to misreading caused by relative movement and radio wave reflection, leading to increased time and reduced reading rate.
Innovation Solution
A wireless tag communication apparatus that transmits a read command designating a flag state to wireless tags, allowing only tags with the corresponding flag state to return identification information, and instructs tags with detected positions to rewrite their flag state, preventing unnecessary re-reading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless tag communication apparatus transmits a read command a plurality of times to prevent misreading, then the reliability of reading identification information is improved, but the time required to read all wireless tags increases and the reading rate decreases
Solution Approach 1:
The wireless tag communication apparatus transmits a read command designating a flag state as a preliminary action before actual reading. This allows the system to identify and exclude tags that have already been read (by checking their flag state) before initiating the reading process, thereby preventing unnecessary re-reading and reducing the time required to read all wireless tags while maintaining reading reliability
Solution Approach 2:
The system uses flag state information from wireless tags as feedback to determine whether a tag has already been read. The read command designates a specific flag state, and tags with this flag state are excluded from reading operations. This feedback mechanism allows the system to adaptively control the reading process and avoid redundant operations, resolving the contradiction between reliability and time consumption
2Reliability
If the wireless tag communication apparatus reads a wireless tag whose position has been detected to ensure complete data collection, then the completeness of position detection is improved, but the chances of reading wireless tags whose position has not been detected decreases
Solution Approach 1:
The system applies different reading strategies to different groups of wireless tags based on their flag states. Tags with a first flag state (indicating position detected) are handled differently from tags with a second flag state (indicating position not detected). The read command designates the first flag state to specifically target and read tags that need position detection, while excluding tags that have already been processed. This local differentiation ensures complete position detection for relevant tags while maintaining high reading rates by avoiding unnecessary re-reading of tags whose positions are already known
Data Source
AI summary
In accordance with an embodiment, a wireless tag communication apparatus transmits a read command designating a first state as a flag state of a wireless tag. The wireless tag communication apparatus acquires identification information returned from a wireless tag whose flag state is the first state. In the wireless tag communication apparatus, a determination unit determines, on the basis of the acquired identification information, whether or not a position of the wireless tag that has returned identification information has been detected, and instructs the wireless tag whose position has been detected to rewrite the flag state to a second state by a wireless communication device.