Container case
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Solution Overview
Problem
The accuracy of reading wireless tags drops when they are arranged near objects with high dielectric constants, such as wood or resin-based materials, due to wavelength shortening and resonance frequency shifts.
Innovation Solution
A container case with a plate-like component featuring cavities and support parts, made of materials with low dielectric constants, is designed to keep the wireless tag away from high dielectric materials, maintaining the tag in an air environment to prevent wavelength shortening and resonance frequency shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless tag is arranged near the placing stand made of high dielectric constant material, then the tag can be supported and displayed, but wavelength shortening occurs and resonance frequency shifts to lower frequency, causing reading accuracy to drop
Solution Approach 1:
The patent introduces a dielectric sheet as an intermediary layer between the wireless tag and the high dielectric constant placing stand. This mediator reduces the direct interaction between the tag and the harmful high dielectric material, thereby minimizing wavelength shortening and resonance frequency shifts while still allowing the tag to be supported for display.
Solution Approach 2:
The patent changes the dielectric parameter of the interface between the tag and the placing stand by introducing a dielectric sheet with controlled dielectric constant. This parameter change reduces the overall dielectric constant at the tag's location, preventing excessive wavelength shortening and resonance frequency shifts, thus maintaining reading accuracy.
2Reliability
If the wireless tag is placed on the placing stand, then the object can be supported, but the high dielectric constant material causes electric length to become longer and shifts resonance frequency
Solution Approach 1:
The dielectric sheet serves as a mediator that decouples the wireless tag from the high dielectric constant placing stand. This intermediary layer stabilizes the electromagnetic environment around the tag, preventing resonance frequency shifts caused by the high dielectric material, thereby maintaining both reading reliability and frequency stability.
Solution Approach 2:
By changing the dielectric parameter at the tag's location through the introduction of a dielectric sheet with appropriate dielectric constant, the patent stabilizes the resonance frequency while maintaining reliable tag reading functionality.
3Strength
If a solid plate-like component is used to support objects, then structural strength is provided, but it creates a large contact area with high dielectric constant material, worsening wavelength shortening effects
Solution Approach 1:
The patent employs a dielectric sheet with a porous or cellular structure (such as foam material) as the plate-like component. This porous structure reduces the effective dielectric constant of the material while maintaining sufficient structural strength to support objects. The reduced dielectric constant minimizes wavelength shortening effects on the wireless tag.
Solution Approach 2:
The patent uses composite material structure combining air pockets (low dielectric constant) with solid matrix (providing strength). This composite approach achieves both structural strength and reduced dielectric constant, thereby minimizing wavelength shortening while maintaining support functionality.
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 container case effectively maintains the accuracy of reading wireless tags by minimizing the impact of high dielectric materials on the tag's resonance frequency, ensuring reliable tag reading.
Implementation Method 1
an antenna that radiates a radio wave for reading a wireless tag
Implementation Method 2
wavelength shortening occurs in the wireless tag and the electric length of the signal becomes longer. That is, the resonance frequency of the wireless tag shifts to a lower frequency. Consequently, if the wireless tag is arranged at a position near the placing stand, the accuracy of reading the wireless tag by the reading device drops
Data Source
Figure 1~2
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Figure 5
AI summary
A container case that can restrain a drop in the accuracy of reading a wireless tag. According to one embodiment, a container case that contains an antenna radiating a radio wave for reading a wireless tag includes a plate-like component including a cavity, on a side where a reading area for the wireless tag is formed by the antenna.