Sensor system based on the Mach-Zehnder interferometer for the rail transport

Nedoma, Jan; Fajkus, Marcel; Martínek, Radek; Witas, Karel; Mec, Pavel; Jargus, Jan; Hejduk, Stanislav; Zavodny, Petr; Vašinek, Vladimír

doi:10.1117/12.2304582

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…Research cooperation between the Faculty of Electrical Engineering and Computer Science (Czech Republic) and Faculty of Operation and Economics of Transport and Communications (Slovakia) has brought several interesting research outputs in this field [1][2][3][4]. This paper directly follows and extends our previously published study [2] in which we present interferometric sensor primarily used for tram vehicle detection, as well as for detection of frequencies generated during trams passage.…”

Section: Introductionmentioning

confidence: 82%

Fiber Optic Phase-Based Sensor for Detection of Axles and Wheels of Tram Vehicles

Nedoma¹,

Kostelanský²,

Fridrich³

et al. 2020

Komunikácie

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This paper presents a novelty approach to usage of the fiber-optic phase-based sensor in railway transportation. We designed and tested the real deployment of this sensor working on the principle of light interferences within optical fibers. The proposed construction of the sensor allowed to increase the sensitivity and thanks to this can be detected and calculated individual axles and wheels of tram vehicles. We performed long-time period measurements (April to September 2019) in diverse climatic conditions, including measurements of 642 tram passages (several different construction types) in real urban traffic. The detection accuracy level was slightly above 99.4 %.

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Section: Introductionmentioning

confidence: 82%

Fiber Optic Phase-Based Sensor for Detection of Axles and Wheels of Tram Vehicles

Nedoma¹,

Kostelanský²,

Fridrich³

et al. 2020

Komunikácie

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“…In recent years, the application of optical fiber sensors (such as Mach–Zehnder, Michelson, or Fabry–Perot) on railway health monitoring was investigated [ 16 ]. The Mach–Zehnder sensor measures the variation of the phase shift between two collimated beams derived by splitting light from a single light source [ 17 , 18 ]. The Michelson interferometer device measures the optical path difference between two splitting laser beams [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Strain Measurement Approach Using Fiber Bragg Grating Sensors for Monitoring of Railway Switches and Crossings

Kerrouche

Najeh

Jaen-Sola

2021

Sensors

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Railway infrastructure plays a major role in providing the most cost-effective way to transport freight and passengers. The increase in train speed, traffic growth, heavier axles, and harsh environments make railway assets susceptible to degradation and failure. Railway switches and crossings (S&C) are a key element in any railway network, providing flexible traffic for trains to switch between tracks (through or turnout direction). S&C systems have complex structures, with many components, such as crossing parts, frogs, switchblades, and point machines. Many technologies (e.g., electrical, mechanical, and electronic devices) are used to operate and control S&C. These S&C systems are subject to failures and malfunctions that can cause delays, traffic disruptions, and even deadly accidents. Suitable field-based monitoring techniques to deal with fault detection in railway S&C systems are sought after. Wear is the major cause of S&C system failures. A novel measuring method to monitor excessive wear on the frog, as part of S&C, based on fiber Bragg grating (FBG) optical fiber sensors, is discussed in this paper. The developed solution is based on FBG sensors measuring the strain profile of the frog of S&C to determine wear size. A numerical model of a 3D prototype was developed through the finite element method, to define loading testing conditions, as well as for comparison with experimental tests. The sensors were examined under periodic and controlled loading tests. Results of this pilot study, based on simulation and laboratory tests, have shown a correlation for the static load. It was shown that the results of the experimental and the numerical studies were in good agreement.

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Sensor system based on the Mach-Zehnder interferometer for the rail transport

Cited by 2 publications

References 5 publications

Fiber Optic Phase-Based Sensor for Detection of Axles and Wheels of Tram Vehicles

Fiber Optic Phase-Based Sensor for Detection of Axles and Wheels of Tram Vehicles

Experimental Strain Measurement Approach Using Fiber Bragg Grating Sensors for Monitoring of Railway Switches and Crossings

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