Monitoring system of railway track based on identity weak fiber Bragg grating array

Zhang Cui; Tao Yuan; Tong Xinglin; Deng Chengwei; He Wei; Gan Weibing; Wang Lixin

doi:10.3788/IRLA201948.0622001

The existing monitoring technologies of railway tracks mainly use the technologies of electrical sensing. These technologies were easy to be affected by electromagnetic fields and external environments and there were potential security risks. Therefore, the on-line monitoring technology of railway track strain based on an identity weak fiber Bragg grating(wFBG) array was used to monitor the occupancy of the track in the real-time. The sensor's structure of sensing railway strain was designed by finite element simulation and the encapsulation technology of sensors was studied. The strain signal was obtained by detecting wFBG wavelength shift to achieve highly sensitive strain measurement. The identity wFBG arrays were used to verify this sensor and system in the laboratory and field experiments. The results show that the sensor structure can achieve a smaller optical loss, and can ensure that the sensitivity of the sensor reaches 3.4 pm/, the linearity reaches 0.997 82, and the hysteresis error reaches 0.8%. The online monitoring system of railway track can meet the actual needs of railway operation and management.

Monitoring system of railway track based on identity weak fiber Bragg grating array

1. National Engineering Laboratory for Fiber Optic Sensing Technology,Wuhan University of Technology,Wuhan 430070,China;

2. School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China

Received Date: 2019-01-05

Rev Recd Date: 2019-02-03

Publish Date: 2019-06-25

Key words:

Abstract: The existing monitoring technologies of railway tracks mainly use the technologies of electrical sensing. These technologies were easy to be affected by electromagnetic fields and external environments and there were potential security risks. Therefore, the on-line monitoring technology of railway track strain based on an identity weak fiber Bragg grating(wFBG) array was used to monitor the occupancy of the track in the real-time. The sensor's structure of sensing railway strain was designed by finite element simulation and the encapsulation technology of sensors was studied. The strain signal was obtained by detecting wFBG wavelength shift to achieve highly sensitive strain measurement. The identity wFBG arrays were used to verify this sensor and system in the laboratory and field experiments. The results show that the sensor structure can achieve a smaller optical loss, and can ensure that the sensitivity of the sensor reaches 3.4 pm/, the linearity reaches 0.997 82, and the hysteresis error reaches 0.8%. The online monitoring system of railway track can meet the actual needs of railway operation and management.

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Reference (15)

[1]	Peng F, Duan N, Rao Y J, et al. Real-time position and speed monitoring of trains using phase-sensitive OTDR[J].Photonics Technology Letters IEEE, 2014, 26(20):2055-2057.
[2]	Kepak S, Cubik J, Zavodny P, et al. Fibre optic track vibration monitoring system[J]. Optical Quantum Electronics, 2016, 48(7):1-10.
[3]	Minardo A, Coscetta A, Porcaro G, et al. Structural health monitoring in the railway field by fiber-optic sensors[J]. Lecture Notes in Electrical Engineering, 2015, 319:359-363.
[4]	Ecke W, Latka I, Willsch R, et al. Fibre optic sensor network for spacecraft health monitoring[J]. Measurement Science Technology, 2001, 12(7):974-980.
[5]	Anjum N, Sreekanth P C, Nayak J. Fiber optic sensors and optical sensing technology[C]//International Conference on Electrical, Electronics, and Optimization Techniques IEEE, 2016:3884-3891.
[6]	Ou Y, Zhou C, Qian L, et al. A Large WDM FBG sensor network based on frequency-shifted interferometry[J]. IEEE Photonics Technology Letters, 2017, 29(6):535-538.
[7]	Ma L, Ma C, Wang Y, et al. High-speed quasi-distributed strain sensing based on time division multiplexing of fibre Bragg gratings[J]. Electronics Letters, 2016, 52(8):643-645.
[8]	Zhang Wei, Ma Pengge, Wang Jinfeng, et al. Study on lateral force of Bragg grating under infrared spectroscopy[J]. Infrared and Laser Engineering, 2015, 44(6):1841-1844. (in Chinese)
[9]	Zhang Faxiang, Lv Jingsheng, Jiang Shaodong, et al. High-sensitivity anti-impact fiber grating micro-vibration sensor[J]. Infrared and Laser Engineering, 2016, 45(8):0822002. (in Chinese)
[10]	Zhang M, Sun Q, Wang Z, et al. A large capacity sensing network with identical weak fiber Bragg gratings multiplexing[J]. Optics Communications, 2012, 285(13-14):3082-3087.
[11]	Ren L, Jia Z G, Li H N, et al. Design and experimental study on FBG hoop-strain sensor in pipeline monitoring[J]. Optical Fiber Technology, 2014, 20(1):15-23.
[12]	Kisala P, Cieszczyk S. Method of simultaneous measurement of two direction force and temperature using FBG sensor head[J]. Applied Optics, 2015, 54(10):2677-2687.
[13]	Wang C, Jiang S, Sun Z, et al. Dynamic fiber Bragg grating sensor array with increased wavelength-division multiplexing density and low crosstalk[J]. Optical Engineering, 2017, 56(3):037101.
[14]	Elgaud M M, Zan M S D, Abushagur A G, et al. Analysis and simulation of time domain multiplexed (TDM) fiber Bragg sensing array using opti system and OptiGrating[C]//International Conference on Advances in Electrical, Electronic and Systems Engineering, IEEE, 2017:301-304.
[15]	Gao Y S. Time-and wavelength-division multiplex distributed sensing interrogation system based on distributed feedback laser array and ultraweak fiber Bragg grating[J]. Optical Engineering, 2017, 56(11):1-8.

Monitoring system of railway track based on identity weak fiber Bragg grating array

doi: 10.3788/IRLA201948.0622001

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