Preview

Devices and Methods of Measurements

Advanced search

QUASI-DISTRIBUTED FIBER-OPTIC RECIRCULATING SYSTEM FOR TEMPERATURE MEASUREMENT BASED ON WAVELENGTH-DIVISION MULTIPLEXING TECHNOLOGIES

https://doi.org/10.21122/2220-9506-2017-8-2-131-141

Abstract

Providing quality and reliable operation as well as temperature monitoring of modern systems are directly related on the use of innovative fiber optic technology based on the concept of so-called distributed and quasi-distributed sensors having large linear dimensions, in which the optical fiber is both sensor and data channel. Existing fiber optic sensors based on stimulated Raman scattering and stimulated Brillouin scattering have relatively high measurement error, long and complicated measurement method, high cost. The purpose of this paper was to develop an automated quasi-distributed fiber optic recirculating temperature measurement system using wavelength division multiplexing technology. Measurement method based on the registration arising due to temperature changes of the frequency of single optical pulses recirculating at adjacent wavelengths. Thus there is a periodic signal restoration on waveform, amplitude and duration. The sensing element is a segment of a multimode silica fiber coated with metal, separated spectrally selective elements, which are mainly offered to use dichroic mirrors. With the help of the developed mathematical model that takes into account the temperature dependence of the coefficient of linear expansion and Young’s modulus of the fiber, the spectral and temperature dependence of the refractive index, the chemical composition of the fibers, the type of metal coating system response function was calculated, which allows to evaluate the sensitivity and measurement accuracy. These studies determined: number of measuring sections (8), the maximal measured temperature (500 °C), the sensitivity (3,28 Hz/°C), the measurement error (±0,2 °C), and the optimum beginning time measurement after starting circulation (15 min), and counting time of the frequency meter (1 s). Carried out estimations have shown that the proposed measuring system can outperform existing analogues on set specifications.

About the Authors

A. V. Polyakov
Belarusian State University
Belarus

Address for correspondence: Polyakov A.V.  - Belarusian State University, Nezavisimosty Ave., 4, Minsk 220030, Belarus    e-mail: polyakov@bsu.by



T. D. Prokopenkova
Belarusian State University
Belarus


References

1. Brown D., Rogachev D. [Distributed temperature control system based on modern fiber-optic sensors]. Tekhnologii TEK, 2005, no. 1, pp. 5–11 (in Russian).

2. Takada H., Kakehata M., Torizuka K. Highenergy dichroic chirped mirror for an ultrashort pulse amplification system. Jpn. J. Appl. Phys., 2003, vol. 42, no. 7А, p. L760–L762. doi: 10.1143/JJAP.42.L760

3. Cooper J.R., McGillem C.D. Probabilistic methods of signal and system analysis. New York, CBS College Publishing, 1986, 376 p.

4. Polyakov A.V. Retsirkulyatsionnye optovolokonnye izmeritel'nye sistemy [Recirculating fiber-optic measuring system]. Minsk, BSU Publ., 2014, 208 p. (in Russian).

5. Gower J. Optical communication systems, London, Prentice-Hall Int. Inc., 1984, 504 p.

6. Skripnikova, N.K., Volokitin O.G. Termofizicheskie svoistva steklovidnykh pokrytii na stroitel'nykh materialakh[Thermophysical properties of glassy coatings on construction materials: methodical instructions for laboratory works]. Tomsk, Tomsk University of architecture and construction, 2012, 23 p. (in Russian).

7. Lunin B.S., Torbin S.N. [Temperature dependence of the young's modulus of pure quartz glasses]. Vestn. Mosk. Univ. Ser. 2. Chemistry, 2000, vol. 41, no. 3, pp. 172–173 (in Russian).

8. Abramov A.A., Bubnov M.M., Vechkanov N.N. [Heat-resistant fiber modules]. Trudy IOFAN, 1987, vol. 5, pp. 72–82 (in Russian).

9. Gibert D.P. [The choice of the suspended optical cable based on the operating conditions]. CABLE-news, 2009, no. 2, pp. 49–53 (in Russian).

10. Bondarenko O.V., Iorgachev D.V., Myradyan L.L. [The choice of design, self-supporting optical cable in a tensile stress]. Technologiya and konstruirovanie v elektronnoj apparature Tekhnologiya i konstruirovanie v elektronnoi apparature, 2001, no. 1, pp. 18–21 (in Russian).

11. Kosyakov O.I., Lipskaya M.A., Mekebaeva A.K., Mataeva A.B. [The possibility of increasing the service life of fiber-optic communication lines]. Izvestiya Vuzov. Priborostroenie, 2015, vol. 58, no. 7, pp. 561–563 (in Russian). doi:10.17586/0021-3454-2015-58-7-561-564.


Review

For citations:


Polyakov A.V., Prokopenkova T.D. QUASI-DISTRIBUTED FIBER-OPTIC RECIRCULATING SYSTEM FOR TEMPERATURE MEASUREMENT BASED ON WAVELENGTH-DIVISION MULTIPLEXING TECHNOLOGIES. Devices and Methods of Measurements. 2017;8(2):131-141. (In Russ.) https://doi.org/10.21122/2220-9506-2017-8-2-131-141

Views: 1925


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.


ISSN 2220-9506 (Print)
ISSN 2414-0473 (Online)