NFC Tag Mapping in GPS-Denied Underground Environments
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Solution Overview
Problem
Mobile devices cannot provide accurate mapping in underground or shielded environments where GPS signals are unavailable, such as underground parking garages, making it difficult for users to locate their parked vehicles.
Innovation Solution
The use of fixed-location NFC tags and a mobile device with NFC reading capabilities, combined with a local Wi-Fi router, allows the device to access map data from a server, enabling the display of a map showing the location of the vehicle and the user's current position within the garage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS-based mapping systems are used, then mapping precision is improved, but they cannot function in underground or shielded environments where GPS signals are blocked
Solution Approach 1:
The patent introduces NFC tags as intermediary objects placed at fixed locations in the environment. These tags serve as mediators between the mobile device and the physical space, allowing the device to determine its location by reading tag identifiers without requiring GPS signals. This intermediary system enables mapping functionality in GPS-denied environments like underground parking garages.
Solution Approach 2:
The patent replaces the GPS-based electromagnetic signal system with an NFC-based proximity detection system. Instead of relying on satellite signals that penetrate through the atmosphere, the system uses near-field communication between the mobile device and NFC tags at known locations. This substitution allows location determination in shielded environments where GPS signals cannot reach.
2Measurement precision
If fixed-location NFC tags are deployed throughout an environment, then location determination capability is improved, but device complexity and infrastructure requirements increase
Solution Approach 1:
The patent divides the environment into discrete location segments marked by individual NFC tags. Each tag represents a specific location or zone, and the mobile device determines its position by identifying which tag it is currently near. This segmentation approach simplifies the overall system compared to continuous positioning systems, as each tag is an independent, simple unit that can be deployed without complex coordination.
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 provides precise mapping in GPS-denied areas, allowing users to navigate back to their vehicles by displaying a map of the underground environment, enhancing user experience and convenience.
Implementation Method 1
The mobile device includes a tag reader (e.g., NFC reader, RFID reader)
Data Source
AI summary
A method for providing location information such as a map in an underground or shielded environment entails storing first near-field communication (NFC) data obtained by reading a first NFC tag at a first location, reading a second NFC tag at a second location, obtaining map data for an area encompassing the first and second locations, and displaying a map showing the first location and the second location.