Display Control System for RFID Location Tracking
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Solution Overview
Problem
Existing RFID-based management systems face challenges in effectively displaying the location of multiple targets in a construction work site, leading to information congestion and poor visibility due to the reliance on dense RFID tag installation and susceptible self-location estimation methods prone to cumulative errors.
Innovation Solution
A display control system that includes first wireless devices attached to targets of management, at least one reading device, and processors to estimate position coordinates of targets based on RFID readings, segment the space into coordinate areas, and display block area information, coordinate area information, and target information to enhance visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RFID tags are installed with high density to estimate the located place of articles, then the accuracy of location estimation is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The real space is segmented into multiple coordinate areas through regular division, allowing the system to display location information in a structured grid format rather than as continuous coordinates. This segmentation reduces the complexity of tracking and displaying numerous RFID tags by organizing them into manageable spatial zones.
Solution Approach 2:
Coordinate areas serve as an intermediary layer between the RFID tags and the display system. Instead of directly displaying information from numerous RFID tags, the system uses coordinate areas as a mediator to aggregate and organize location data, reducing the complexity of the display while maintaining location estimation accuracy.
2Loss of information
If information regarding all articles is visualized on the screen, then complete information is provided, but information congestion occurs resulting in poor visibility
Solution Approach 1:
The display screen is segmented into coordinate areas that correspond to the divided real space. Information about multiple articles is organized within these segmented regions rather than displayed as a congested whole, improving visibility while maintaining information completeness through structured spatial organization.
Solution Approach 2:
The system transitions from displaying article information in a two-dimensional list or map view to a three-dimensional spatial representation using coordinate areas. This dimensional approach allows users to perceive the distribution and density of articles across different spatial zones, reducing information congestion while preserving completeness.
3Device complexity
If self-location estimation method is used to overcome RFID tag density requirements, then device complexity is reduced, but cumulative errors affect measurement precision
Solution Approach 1:
By segmenting the environment into coordinate areas with known positions, the system provides fixed reference points that can correct cumulative errors in self-location estimation. The segmented spatial framework serves as a reference grid that anchors the otherwise drift-prone pedestrian dead reckoning calculations.
Solution Approach 2:
The system uses the segmented coordinate areas as feedback references to correct cumulative errors in self-location estimation. By periodically comparing estimated positions against the known coordinate area boundaries and centers, the system can reset or adjust accumulated errors, maintaining long-term location accuracy without requiring dense RFID tag installation.
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 effectively manages the display of information regarding the located place of multiple targets, reducing information congestion and improving visibility by segmenting the space into coordinate areas and displaying relevant information in a structured manner.
Implementation Method 1
Radio frequency identification (RFID) is a technique for making it possible to read information embedded in a small-sized device, also called 'tag,' by means of an external reader using near field wireless communication.
Data Source
AI summary
A display control system segments a real space into a plurality of coordinate areas regularly. The display control system includes one or more processors and one or more memories storing instructions. When executed by the one or more processors, the instructions cause the display control system to set a block area from at least one of the coordinate areas and display, on a display device, block area information that represents the block area and coordinate area information regarding the coordinate area to which position coordinates estimated for each of a plurality of targets of management belong.