Indoor Positioning via RFID Tag Segmentation
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Solution Overview
Problem
Conventional GPS technology is ineffective for indoor navigation due to signal reception limitations, and it struggles with accurate positioning in large, complex environments such as exhibition halls, museums, shopping malls, and factories, especially in vertical directions.
Innovation Solution
A positioning navigation system utilizing RFID technology with identification tags placed at various locations, allowing mobile devices to access unique position data and generate position information using a combination of UHF and HF frequency signals, enabling accurate indoor navigation and route planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS technology is used for positioning, then outdoor positioning can be achieved, but indoor positioning is not possible due to signal reception limitations
Solution Approach 1:
The system divides the positioning function into two segments: GPS for outdoor positioning and RFID tag-based positioning for indoor positioning. This segmentation allows each subsystem to operate optimally in its designated environment, resolving the contradiction between outdoor positioning capability and indoor positioning availability.
Solution Approach 2:
RFID tags serve as intermediary objects that enable positioning in indoor environments where GPS signals cannot penetrate. The tags are placed throughout the indoor space and detected by mobile devices, providing position information without requiring direct satellite signal reception.
2Measurement precision
If GPS technology is used for navigation, then general route guidance can be provided, but accurate indoor navigation in large-scale facilities cannot be achieved
Solution Approach 1:
The system applies different positioning methods with different precision characteristics to different spatial contexts. RFID tags provide high-precision positioning within specific indoor zones (local quality), while GPS provides lower-precision but broader coverage positioning outdoors. This resolves the contradiction between positioning accuracy and coverage area.
3Measurement precision
If conventional GPS technology is used, then satellite-based positioning can be achieved, but positioning in vertical directions between different floors generates great errors
Solution Approach 1:
RFID tags placed at specific vertical locations serve as intermediary reference points that enable accurate vertical positioning between floors. Instead of relying on GPS satellite signals that cannot penetrate buildings, the system uses locally deployed tags to mediate position determination in the vertical dimension.
4Measurement precision
If GPS technology is used for automated machine navigation, then outdoor route following can be achieved, but highly accurate positioning in complex indoor factory environments cannot be provided
Solution Approach 1:
The system changes the positioning parameter from satellite-based coordinates (GPS) to locally-referenced RFID tag identifiers. This parameter change enables the system to adapt to complex indoor factory environments where satellite signals are unavailable, providing the high navigation accuracy required for automated machine operations.
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 reliable indoor positioning and navigation services, improving accuracy compared to GPS, and effectively guides users or automated machines through complex environments, including large-scale factories and indoor spaces.
Implementation Method 1
By integrating a data access function of radio frequency identification (RFID) technology and a design of positioning the locations of the identification tags
Data Source
AI summary
A positioning navigation system using identification tags and a method thereof is provided. The system and method are applied to an area having a plurality of identification tags to position and navigate a mobile apparatus. The system includes a plurality of identification tags and a mobile apparatus. The method includes steps of accessing unique position data stored in at least one identification tag and generating position information of the mobile apparatus according to the unique position data stored in the at least one identification tag and a geographic data of the area. The unique position data of each identification tag corresponds to a coordinate position of the geographic data of each identification tag within the area.