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International Journal of Frontiers in Engineering Technology, 2023, 5(12); doi: 10.25236/IJFET.2023.051201.

A Real-time Seating Monitoring System for Smart Campuses Based on Quasi-distributed Weak Fiber Bragg Grating Array

Author(s)

Liu Haolun

Corresponding Author:
Liu Haolun
Affiliation(s)

Tieyi Middle School, Xi’an, China

Abstract

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.

Keywords

Weak Fiber Bragg Grating; Sensor; Quasi-distributed; Smart Campuses

Cite This Paper

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.

References

[1] Yang G, Huang T S. Human face detection in a complex background[J]. Pattern recognition, 1994, 27(1): 53-63. 

[2] Kumar A, Kaur A, Kumar M. Face detection techniques: a review[J]. Artificial Intelligence Review, 2019, 52: 927-948. 

[3] Ripka P. Electric current sensors: a review[J]. Measurement Science and Technology, 2010, 21(11): 112001. 

[4] Leland E S, Sherman C T, Minor P, et al. A new MEMS sensor for AC electric current [C]//SENSORS, 2010 IEEE. IEEE, 2010: 1177-1182.

[5] Hui L, Hao X, Bing X. Long-distance Sensing System Based on Ultra-weak Fiber Bragg Grating Array [J]. Laser & Optoelectronics Progress, 2023, 11:1-13.

[6] Wei C, Qing L, Yan M, et al. High-Resolution Array Fiber Grating Temperature Sensing System Based on Narrow Linewidth Swept Light Source [J]. Acta Optica Sinica, 2023, 43(09):32-38.

[7] QI Hua, FENG Yan, PAN Ruizhi, et al. Bionic Touch Sensing of Wearable Fingerstall Based on Optical Fiber Bragg Grating[J]. Acta Photonica Sinica, 2023, 52(7):0706003.

[8] Turan Erdogan. Fiber Grating Spectra[J]. J. Lightwave Technol; 1997, 15(08):1277-1294