RFID Reader Antenna Asymmetry for Height Adaptability
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Solution Overview
Problem
Conventional RFID readers are square in shape, limiting the use of ID cards with camera functions to specific heights, resulting in uncomfortable and unnatural head positions for users, especially those of different heights or wheelchair users, which affects the reliability of facial recognition.
Innovation Solution
An RFID reader with a taller-than-wide antenna design, allowing for contactless ID card use at various heights, featuring a housing with a transparent inner part for LED lighting and a stand for flexible placement, enabling convenient use with ID cards and camera cards across different heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional square RFID readers are used, then the device structure is simple and manufacturing is easy, but the usability is limited for people of different heights and wheelchair users
Solution Approach 1:
The patent applies asymmetry by changing the antenna from a conventional square shape to a vertically elongated rectangular shape with height greater than width. This asymmetric design creates a taller reading field that accommodates users of different heights and wheelchair users, directly resolving the contradiction between ease of operation and device complexity by introducing a simple geometric modification.
Solution Approach 2:
The patent applies dimensionality change by emphasizing the vertical dimension of the antenna structure. By making the antenna height significantly greater than its width, the reading field extends vertically to cover a larger range of heights, transforming a two-dimensional square plan into a three-dimensional vertically-oriented structure that solves the usability problem.
2Adaptability or versatility
If the antenna height is increased to accommodate various user heights, then the field of view coverage is improved, but the device dimensions increase
Solution Approach 1:
The patent applies universality by designing the vertically elongated antenna to serve multiple user groups simultaneously - standing users, shorter users, and wheelchair users - all within a single device configuration. The extended vertical coverage allows one antenna to perform the function that would otherwise require multiple antennas at different heights, resolving the contradiction between adaptability and device dimensions.
3Adaptability or versatility
If conventional square antennas are used, then the manufacturing cost is low, but multiple readers are needed for different heights
Solution Approach 1:
The patent applies merging by combining the functionality of multiple readers (needed for different height zones) into a single vertically elongated antenna structure. The extended vertical reading field consolidates what would require separate devices into one unit, reducing the quantity of equipment needed while maintaining versatility across different user heights.
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 design allows for barrier-free and comfortable use of contactless ID cards by people of varying heights, enhancing facial recognition reliability and reducing the need for multiple readers at different heights, while being cost-effective and visually recognizable.
Implementation Method 1
Communication or coupling between the transponder and reader is achieved through a high-frequency alternating electromagnetic field generated by the reader
Implementation Method 2
at least one plate, in particular the front plate (13) and/or the inner part (14) and/or the rear plate (15), is cut to size using a laser to produce the housing (11)
Implementation Method 3
The housing (11) comprises a front panel (13), a rear panel (15) and an inner part (14) arranged in the direction of the central axis (16) between the front panel (13) and the rear panel (15)
Data Source
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AI summary
An RFID reader (10) is described which allows use at different heights. The reader (10) comprises a housing (11) and at least one antenna (22) arranged in the housing (11), the antenna being formed from at least one conductor loop. The conductor loop has a central axis (16), a height h in a longitudinal direction (17) extending perpendicular to the central axis (16), and a width b in a transverse direction (18) extending perpendicular to both the central axis (16) and the longitudinal direction (17). According to the invention, the height h is greater than the width b.