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1. (WO2018048326) LONG-GAUGE DISTRIBUTED FIBRE OPTIC SENSOR

Pub. No.:    WO/2018/048326    International Application No.:    PCT/RU2017/000620
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Sat Aug 26 01:59:59 CEST 2017
IPC: G01N 21/57
G01B 11/16
Applicants: LIMITED LIABILITY COMPANY "TST ENGINEERING"
ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "ТСТ ИНЖИНИРИНГ"
Inventors: BUROV, Vladimir Nikolaevich
БУРОВ, Владимир Николаевич
SEMENYUGA, Vyacheslav Vladimirovich
СЕМЕНЮГА, Вячеслав Владимирович
ZENKINA, Yana Vladimirovna
ЗЕНКИНА, Яна Владимировна
ZAKHAROV, Dmitriy Borisovich
ЗАХАРОВ, Дмитрий Борисович
PEREDERIY, Vyacheslav Ivanovich
ПЕРЕДЕРИЙ, Вячеслав Иванович
YAKOVLEV, Vadim Anatol'yevich
ЯКОВЛЕВ, Вадим Анатольевич
Title: LONG-GAUGE DISTRIBUTED FIBRE OPTIC SENSOR
Abstract:
The present sensor relates to distributed fibre optic sensors based on the phenomenon of Brillouin light scattering, which use an optical fibre as a sensing element, and can be used for measuring the distribution of mechanical stresses and/or temperature with a high degree of accuracy and a high spatial resolution. A distributed fibre optic sensor for measuring deformation and/or temperature using the phenomenon of Brillouin scattering contains two sources of optical radiation, a sensitive optical fibre, and an optical radiation detector, wherein a first end of the sensitive optical fibre is connected to the first source, and a second end is connected to the second source. The detector is connected to the first end of the sensitive optical fibre to register a signal. The second source is connected to the sensitive optical fibre by a line link of a fibre optic transmission line, the length of which is not less than half of the length of the sensitive optical fibre, wherein the line link is equipped with a device which prevents optical radiation from the sensitive optical fibre from entering the line link. The technical result is an increase in the distance to remote measuring regions, a reduction in measuring time, and an increase in signal-to-noise ratio.