RFID Bookcase Unit Layout With Metal Shielding Between Shelves
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Solution Overview
Problem
Traditional RFID-based bookcase systems face challenges in identifying books due to electromagnetic field penetration issues caused by book density and moisture variations, leading to incomplete identification of books.
Innovation Solution
A bookcase system with adjacently arranged units, each equipped with an RFID reader and a separating structure composed of three metal plates, which prevents electromagnetic waves from spreading between units, allowing for effective identification of books within individual units using a single RFID reader.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If books are placed continuously in the bookcase system to increase storage capacity, then the volume of books stored is improved, but the electromagnetic field penetration is blocked by paper density and moisture variation, causing identification failure
Solution Approach 1:
The bookcase system is divided into multiple bookcase units, each equipped with its own RFID reader. This segmentation allows each reader to independently manage and identify books within its specific unit, preventing interference from books in other units and ensuring reliable identification even when books are densely stored.
2Measurement precision
If RFID readers are used to identify books in adjacently arranged bookcase units, then the identification capability is improved, but electromagnetic waves are received by wrong bookcase units causing misidentification
Solution Approach 1:
The harmful electromagnetic wave interference is extracted and isolated by placing separating structures between adjacently arranged bookcase units. These separating structures contain the electromagnetic waves generated by each RFID reader within its own bookcase unit, preventing them from interfering with neighboring units and eliminating misidentification.
3Device complexity
If traditional RFID tags are used on books without separating structures, then the device complexity is kept simple, but the electromagnetic waves cannot penetrate through dense book arrangements
Solution Approach 1:
Separating structures are introduced as intermediary elements between adjacently arranged bookcase units. These structures serve as mediators that manage electromagnetic wave propagation, allowing each RFID reader to effectively communicate with RFID tags on books within its own unit while preventing interference from neighboring units, thus solving the penetration issue without requiring complex system changes.
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 book identification by ensuring that only the RFID reader in the relevant unit can identify the books, improving accuracy and reducing misidentification, while the metal structure maintains electromagnetic waves within the unit.
Implementation Method 1
a separating structure placed between two of the adjacently arranged bookcase units. The separating structure may further include at least three metal plates forming a three-layer stacked structure
Implementation Method 2
The RFID technology utilizes RFID readers which are electro-magnetic readers with antennas to generate electro-magnetic fields or emit electro-magnetic waves to RFID tags
Data Source
AI summary
A bookcase system is provided. The bookcase system includes at least adjacently arranged two bookcase units. Each of the bookcase units further includes a first RFID reader having an antenna and placed on a first lateral side of the bookcase unit. The bookcase unit further includes a separating structure placed between two of the adjacently arranged bookcase units. The separating structure may further include at least three metal plates forming a three-layer stacked structure, and a lateral side of each of the metal plates is larger than half of a wavelength of an operating frequency of the antenna. And books are placed along a direction parallel to the lateral side.