Movable Antenna Tag Reader for Reliable RFID Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tag reading devices face challenges in reliably reading information from wireless tags attached to articles, particularly when tags are densely packed or at varying distances, due to issues with radio wave intensity and interference, leading to potential missed readings or erroneous readings from outside noise.
Innovation Solution
A wireless tag reading device with a chamber and two movable RFID antennas, where the antennas can change distance and direction to optimize radio wave intensity and coverage, using a moving mechanism to ensure reliable reading of tags even in densely packed conditions, while minimizing interference and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the intensity of radio waves emitted by the antenna is increased, then the reliability of reading wireless tags is improved, but wireless tags may be inadvertently read from beyond the intended reading region
Solution Approach 1:
The patent employs a movable antenna that can dynamically adjust its position and orientation to optimize the reading region. By making the antenna position variable rather than fixed, the system can concentrate radio wave energy precisely where needed while minimizing spill-over to unintended areas, thus maintaining high reading reliability without causing inadvertent readings.
Solution Approach 2:
The system changes the physical parameters of the antenna (position, orientation, distance from articles) to optimize radio wave distribution. By adjusting these parameters, the reading region can be precisely controlled to match the intended target area, achieving reliable reading without extending coverage to unintended zones.
2Object-affected harmful factors
If the intensity of radio waves emitted by the antenna is decreased, then inadvertent reading is reduced, but missed readings occur with respect to wireless tags on articles tightly packed together
Solution Approach 1:
The movable antenna can dynamically adjust its position to get closer to tightly packed articles when needed, concentrating radio wave energy precisely on the target tags. This dynamic positioning allows the system to maintain lower overall intensity while achieving sufficient signal strength for densely packed articles, preventing both inadvertent reading and missed readings.
Solution Approach 2:
The system applies radio wave energy locally and precisely to the intended reading region by positioning the antenna optimally. This localized approach ensures that energy is concentrated where needed (on tightly packed tags) without unnecessarily increasing overall intensity that would cause inadvertent reading of distant tags.
3Device complexity
If a single antenna is used, then the device complexity is reduced, but the ability to read tags in densely packed conditions is insufficient
Solution Approach 1:
The patent uses a single movable antenna instead of multiple fixed antennas. This dynamic single-antenna approach achieves the reading capability of multiple antennas by positioning the single antenna optimally to cover all target articles, thereby maintaining reading reliability for densely packed conditions while reducing device complexity.
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
The solution enables reliable and efficient reading of RFID tags attached to articles, preventing missed readings and reducing errors by dynamically adjusting antenna position and radio wave intensity within the chamber, ensuring accurate inventory tracking and management.
Implementation Method 1
a first antenna (15-1) is provided for outputting a signal for reading information from a wireless tag (30) attached to an article (G) stored in the chamber (12)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A wireless tag reading device includes a chamber in which an article having a wireless tag attached thereto can be stored. A first antenna is provided for outputting a signal for reading information from the wireless tag attached to the article stored in the chamber. A second antenna is also provided for outputting the signal for reading information from the wireless tag. A first moving mechanism is configured to change a distance between the wireless tag and the first antenna during a reading process for reading information from the wireless tag in the chamber.