Electronic Seal Coupling Antenna for Longer RFID Reading Distance
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Solution Overview
Problem
Existing electronic seal devices face economic inefficiencies due to complex structure arrangements and poor antenna performance, with non-standard dipole antenna formations resulting in inadequate signal reading distances.
Innovation Solution
A circuit device with a radiation frequency circuit integrated into the bolt pin, using a coupling feed effect with the hole body to form a standard dipole antenna by electrically connecting with both the upper and lower monopole antennas, eliminating direct contact issues and enhancing antenna gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit device connects to the upper lid through direct contact to form an upper monopole antenna, then the antenna function is achieved, but the production cost increases and production stability deteriorates due to complex structure arrangements requiring accurate separation and recontact
Solution Approach 1:
The patent replaces the mechanical direct contact connection between the circuit device and upper lid with an electromagnetic coupling field connection. The coupling field antenna uses electromagnetic induction to transfer energy and signals without physical contact, thereby eliminating the need for complex mechanical separation and recontact structures, reducing production complexity, and improving production stability.
Solution Approach 2:
The patent introduces a coupling field as an intermediary between the circuit device and upper lid. This coupling field serves as a mediator that enables antenna functionality through electromagnetic interaction rather than direct mechanical contact, simplifying the overall structure and reducing production requirements for precise alignment and contact.
2Reliability
If the bolt pin forms an inverted L-shaped antenna arrangement connecting to the upper lid, then the antenna function is achieved, but the antenna gain is far smaller than a standard dipole antenna arrangement resulting in insufficient reading distance
Solution Approach 1:
The patent inverts the traditional antenna connection approach by using electromagnetic coupling fields instead of direct mechanical connections. This inversion transforms the inverted L-shaped antenna arrangement into a configuration that can achieve standard dipole antenna characteristics through field interaction, thereby improving antenna gain and reading distance without being constrained by mechanical connection geometries.
Solution Approach 2:
The patent changes the fundamental operating parameter of the antenna system from mechanical contact-based current flow to electromagnetic field-based energy transfer. This parameter change enables the system to achieve standard dipole antenna performance characteristics regardless of the physical bolt pin configuration, thereby improving antenna gain and reading distance.
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
This solution simplifies production, reduces costs, and significantly improves antenna performance by forming a standard dipole antenna, increasing signal reading distance and reliability.
Implementation Method 1
the radiation unit and a hole body of the receiving hole generate an effect of coupling feed so as to transmit an electromagnetic wave signal by means of frequency response
Implementation Method 2
the upper and lower monopole antennas jointly form a standard dipole antenna, and thus, the entirety of operation of the present invention surely provides an antenna gain
Data Source
AI summary
The present invention includes a plug bolt and a bolt seat. The plug bolt includes a bolt pin having a receiving hole that receives a circuit device including an RFID chip electrically connected with a main circuit and a radiation unit. The receiving hole defines a hole body arranged in an axial direction, and an open hole bottom at a bottom of the hole body. The main circuit includes a lower contact point. The radiation unit induces an effect of coupling feed with respect to the hold body to make the bolt pin forming an upper monopole antenna. The bolt seat includes a lower monopole antenna and a locking hole into which the bolt pin is insertable. When the lower monopole antenna is electrically connected with the lower contact point, the upper and lower monopole antennas jointly form a standard dipole antenna to emit a signal that is monitorable.