Dual-Antenna IC Tag Reader Zone Segmentation
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Solution Overview
Problem
RFID systems with interrogators capable of reading multiple IC tags simultaneously face challenges in distinguishing between the intended IC tag and nearby tags, leading to potential false readings.
Innovation Solution
An apparatus and method utilizing a dual-antenna setup with distinct directivities to form specific readable and non-readable areas, allowing the system to determine whether information is intended for the IC tag based on the presence or absence of signals from both antennas and elapsed time, thereby distinguishing between the intended and nearby tags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an interrogator capable of reading multiple IC tags simultaneously is used, then reading efficiency is improved, but false recognition of nearby tags occurs
Solution Approach 1:
The patent divides the reading area into multiple zones using multiple antennas with different directivities. Each antenna is responsible for specific spatial regions, allowing the system to segment the monitoring area and identify which zone the target tag occupies, thereby preventing false recognition from nearby tags.
Solution Approach 2:
The patent assigns different directivities and coverage areas to different antennas, creating local quality differences in the reading fields. This allows each antenna to be optimized for specific directions, enabling precise determination of tag location and preventing interference from tags in other zones.
2Reliability
If antenna output or position is adjusted to prevent reading nearby IC tags, then false recognition is reduced, but reading capability for intended tags may be affected
Solution Approach 1:
The patent dynamically selects and combines signals from multiple antennas based on the determined zone of the target tag. The system adapts its reading strategy by activating specific antennas or adjusting signal weights according to the spatial location, maintaining high reading capability while preventing false recognition from other zones.
Solution Approach 2:
The patent implements a feedback mechanism where the system determines which zone the tag is in based on signal characteristics from multiple antennas, then uses this information to adjust the reading process. This feedback loop ensures that only tags in the intended zone are read, preventing false recognition while maintaining reading efficiency.
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
Effectively prevents false recognition of IC tags by accurately determining the intended tag's information, ensuring precise identification and reducing errors in systems like baggage management.
Implementation Method 1
an RFID (Radio Frequency IDentification) system with electric waves or electromagnetic waves as a medium
Data Source
AI summary
An apparatus and method for apparatus for recognizing information stored in an IC tag. An embodiment includes: an antenna part having a first antenna and a second antenna for receiving electric waves from the IC tag, and configured to form a plurality of areas including an area in a readable range of the first antenna, an area in a readable range of the second antenna, and an area in a readable range of the first antenna and the second antenna; a reader part for reading the information stored in the IC tag via the antenna part; and a determination part for determining whether the information stored in the IC tag should have been read by the reader part, based on a presence or absence of information read via the first antenna and the second antenna in the plurality of areas.