Dual-Mode Communication Terminal for GPS-Denied Worker Location
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Solution Overview
Problem
In dangerous operations such as firefighting, existing systems struggle to accurately locate workers in areas where GPS satellite radio waves cannot reach, making it difficult to determine which worker needs rescue assistance despite receiving their biological information wirelessly.
Innovation Solution
A communication terminal device system that uses a combination of near field communication and business wireless communication schemes, allowing for the identification of workers in distress and directing nearby workers for rescue through a pairing search and identifier mapping, even in areas without GPS coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS satellite communication is used to locate workers, then location accuracy is improved, but coverage area is limited to areas with satellite visibility
Solution Approach 1:
The patent introduces a dual-communication architecture where a first communication scheme (e.g., radio waves) provides wide-area coverage for locating workers in GPS-denied environments, while a second communication scheme (e.g., optical communication) provides high-precision location data when available. The system acts as an intermediary that switches between or combines these schemes to resolve the contradiction between coverage area and location accuracy.
2Reliability
If wireless biological information monitoring is implemented, then worker safety monitoring is improved, but location identification capability deteriorates in GPS-denied areas
Solution Approach 1:
The patent merges biological information monitoring with location identification functions into a single integrated system. The terminal device simultaneously monitors physiological parameters (heart rate, temperature, etc.) and determines location using the first communication scheme, ensuring that both safety monitoring and location identification functions operate together even in GPS-denied environments.
3Device complexity
If a single communication scheme is used for both wide-area communication and precise location search, then system complexity is reduced, but communication efficiency deteriorates
Solution Approach 1:
The patent segments the communication function into two distinct schemes: a first communication scheme optimized for wide-area coverage and initial worker location, and a second communication scheme optimized for high-precision location searches and detailed communication. This segmentation allows each scheme to operate in its optimal performance range, improving overall communication efficiency while maintaining manageable system complexity through clear functional division.
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
Enables accurate identification and rapid response to workers in dangerous situations by determining the closest worker using radio field intensity in near field communication, ensuring timely rescue even in GPS-denied environments.
Implementation Method 1
a near field communication unit 131 that searches for a first communication terminal device 20
Data Source
AI summary
A first communication unit communicates with a first communication terminal device by using a first communication scheme. A second communication unit communicates with a second communication terminal device by using a second communication scheme capable of communication over a longer distance than the first communication scheme. A search instruction communicating unit communicates a search instruction to the second communication terminal device via the second communication unit, the search instruction including an identifier identifying a first communication terminal device, and instructing the second communication terminal device to search for the first communication terminal device by using the first communication scheme.