Hybrid RFID Localization Using Infrared Signposts
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Solution Overview
Problem
Existing RFID systems employing infrared (IR) signals face limitations in localization accuracy, system status information provision, global interconnection, and adaptability for multiple applications, with rigid hardware designs and complex, expensive RF-based localization systems.
Innovation Solution
An RFID system comprising an IR signpost with multiple infrared transmitters, a processor-controlled transmitter, and receivers that use IR, RF, or acoustic signals for localization, status updates, and global control, enabling precise localization, enhanced data acquisition, and flexible operation over various networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If RF signals are used for localization, then signal penetration through walls and obstacles is improved, but localization accuracy deteriorates due to reflections and refractions
Solution Approach 1:
The system divides the localization function into two separate components: RF tags for long-range detection and IR signposts for precise localization. This segmentation allows each component to specialize in its optimal function, with IR providing accurate position data without suffering from RF reflection problems
Solution Approach 2:
The patent introduces IR signposts as an intermediary system between RF tags and the final localization determination. The IR signposts receive RF signals and translate them into precise IR-based location data, mediating between the penetrating RF signals and the accuracy requirements
2Measurement precision
If IR signals are used for precise localization, then localization accuracy is improved, but system complexity and cost increase
Solution Approach 1:
The patent combines RF and IR systems into a unified hybrid localization system where RF tags and IR signposts work together. This merging allows the system to achieve precise localization through IR while using RF for initial detection and long-range communication, reducing overall system complexity
Solution Approach 2:
The hybrid system serves multiple functions: RF tags provide long-range detection and communication, while IR signposts provide precise localization. This multi-functionality allows a single system to handle both long-range and short-range requirements, reducing the need for separate specialized systems
3Measurement precision
If existing IR-based RFID systems are used, then localization precision is improved, but adaptability for multiple applications deteriorates due to rigid hardware designs
Solution Approach 1:
The patent employs a dynamic hybrid architecture where RF and IR components can be selectively activated and configured based on application requirements. This dynamic design allows the system to adapt between different modes of operation, switching between RF-only, IR-only, or hybrid modes depending on the specific application needs
4Length of stationary object
If RF-based localization systems are deployed, then long-range detection capability is improved, but system cost and complexity increase
Solution Approach 1:
The patent extracts the precise localization function from the RF system and assigns it to a separate IR signpost system. This extraction allows the RF system to focus on long-range detection while the IR system handles precise positioning, reducing the complexity burden on the RF component
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 system provides improved localization accuracy, enhanced asset utilization, productivity, and security by using IR signals for precise tracking and control, while allowing for global interconnection and adaptability across diverse applications.
Implementation Method 1
An RFID system employs infrared (IR) signals, particularly in an IR signpost
Implementation Method 2
RFID tags may contain silicon chips and antennas to enable them to receive and respond to radio-frequency queries
Implementation Method 3
Usable RFID localization systems based upon RF signal time-of-flight have been developed and deployed
Data Source
AI summary
A series of radio frequency identification (RFID) systems are delineated. An RFID system comprises an RFID signpost having a transmitter for transmitting signals of a predefined type, and a receiver for receiving signals of the predefined type, wherein the transmitter for transmitting signals of the predefined type cannot transmit until a determination is made that the predefined type of signal is not present at the receiver. Another RFID system comprises an RFID signpost including a transmitter having a continuous power dissipation rating, and a processor for controlling the transmitter such that peak pulse power of a transmission from the transmitter multiplied by its duty cycle does not exceed the continuous power dissipation rating for the transmitter.