International Journal of Frontiers in Engineering Technology, 2023, 5(12); doi: 10.25236/IJFET.2023.051201.
Liu Haolun
Tieyi Middle School, Xi’an, China
This paper presents a real-time sensing system for seating monitoring in smart campuses based on a quasi-distributed weak fiber Bragg grating (w-FBG) array. We utilize fiber Bragg gratings as the key pressure sensor and design a simple spring-loaded packaging structure. The w-FBG array is placed under the seat to detect pressure changes. By sensing pressure variations, the w-FBG array achieves the purpose of monitoring students' seating conditions. We simulated the grating length, coupling coefficient, and their effects on the grating reflectivity and bandwidth using MATLAB software, providing a design reference for the w-FBG array. The optimal result obtained was a grating length of 25mm and a coupling coefficient of 0.327. This paper presents a low-power, simple, practical, and economically feasible optical sensing seating monitoring system, contributing to the construction of smart campuses.
Weak Fiber Bragg Grating; Sensor; Quasi-distributed; Smart Campuses
Liu Haolun. A Real-time Seating Monitoring System for Smart Campuses Based on Quasi-distributed Weak Fiber Bragg Grating Array. International Journal of Frontiers in Engineering Technology (2023), Vol. 5, Issue 12: 1-7. https://doi.org/10.25236/IJFET.2023.051201.
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