RF Tag Communication Device Polarization Switching Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radio-frequency tag communication devices face failures in reading out tags due to sensitivity drops caused by relative positional relationships with the tags, especially when tags are frequently moved and polarization planes are switched at inappropriate times.
Innovation Solution
A radio-frequency tag communication device with a polarization-plane switching control that switches antenna polarization within one-third of the estimated time the tag stays in the communication field, and adjusts communication parameters like frequency, modulating system, and command order to ensure successful communication with multiple tags during this time interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna switches polarization planes during communication with a radio-frequency tag, then the communication reliability is improved by adapting to different tag orientations, but the complexity of the communication control increases due to timing coordination requirements
Solution Approach 1:
The system preliminarily sets an estimated time period for tag presence and calculates the switching time interval (one-third of the estimated time) in advance. This preliminary timing calculation allows the polarization plane switching to be coordinated with the communication process, ensuring that switching occurs at appropriate moments without disrupting ongoing communications, thus improving reliability while managing control complexity.
Solution Approach 2:
The antenna polarization plane is dynamically switched during communication based on calculated timing intervals. The system adapts the polarization orientation in real-time according to the estimated tag presence duration, allowing the communication system to respond to changing tag orientations and positions, thereby improving communication reliability with moving or differently-oriented tags.
2Adaptability or versatility
If the polarization planes are switched frequently to accommodate moving tags, then the adaptability to tag position changes is improved, but the risk of communication failure increases due to switching occurring at inappropriate timings
Solution Approach 1:
The system performs preliminary calculation of the switching time interval based on an estimated time period that the tag will remain in the communication field. By determining the optimal switching timing in advance (as one-third of the estimated presence time), the system avoids switching at inappropriate moments that would disrupt communication, thus maintaining both adaptability and reliability.
Solution Approach 2:
The communication control portion monitors the communication status and adjusts the polarization switching timing based on feedback from the communication process. This feedback mechanism ensures that switching operations are coordinated with actual communication needs, preventing failures while maintaining adaptability to tag movement.
3Productivity
If the communication is completed within a short time interval to match polarization switching, then the efficiency of utilizing polarization switching opportunities is improved, but the complexity of coordinating communication parameters increases
Solution Approach 1:
The system preliminarily determines the switching time interval as one-third of the estimated tag presence time and uses this pre-calculated interval to structure the communication process. This preliminary timing framework allows the communication control to efficiently organize data transmission and reception within appropriate time windows, improving productivity while managing parameter coordination through a structured approach.
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 approach reliably prevents failures in reading out radio-frequency tags by ensuring the tags remain within the communication field during polarization plane switching and completes series of communications efficiently, even when tags are moved or not initially within range.
Implementation Method 1
an antenna (52) which switches polarization planes used in communication
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A radio-frequency tag communication device configured to appropriately minimize a failure in reading out of a targeted radio-frequency tag is provided. The radio-frequency tag communication device comprises a polarization-plane switching control portion 78 operative to switch polarization planes of an antenna within one-third of a time interval TStay preliminarily set in which the targeted radio-frequency tag 14 stays in a communication field, and a communication control portion 76 controlling a parameter used in communication so as to complete the communication in association with a command group to execute a series of communications with plural radio-frequency tags 14 selected in response to a "Select" command once within a time interval in which the polarization-plane switching control portion 78 switches the polarization planes of the antenna.