Experimental comparison of homodyne demodulation algorithms for phase fiber-optic sensor

Беликин, М Н; Плотников, М Ю; Strigalev, V. E.; Kulikov, A. V.; Киреенков, А Ю

doi:10.17586/2226-1494-2015-15-6-1008-1014

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…A homodyne demodulation algorithm based on the arctangential method [17][18][19][20] was used, the parameters of the interrogation circuit were selected in the desired frequency range (below 200 kHz): the sampling rate of the ADC was 5 MHz, the induced phase modulation frequency was 500 kHz, Low Pass Filter (LPF) -up to 250 kHz, High Pass Filter (HPF) -above 1 kHz, the sampling frequency of the output signal was 2.5 MHz.…”

Section: Advanced Materials and Applicationmentioning

confidence: 99%

Composite Materials Monitoring by Fiber Optic Sensors

Efimov

Volkovskiy

Куликов

et al. 2018

AMR

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The paper presents methods for testing the composite materials using two types of fiber-optic sensors as well as a method for using radiation of the vertical-cavity emitting laser radiation (VCSEL) for checking the material deformation and its performances. The deformation checking sensor is a fiber Bragg grating (FBG) with a spectrum width of 50 pm, which is interrogated by the VCSEL. A new algorithm for modulating the laser diode current is proposed for the FBG interrogation providing a dynamic range of at least 3 nm. A new interrogation method of impulse Fabry-Perot interferometer was proposed. The interrogation method was applied for a fiber-optic acoustic emission sensor manufacturing. The sensor was experimentally investigated by the impact of a 6 mm diameter steel ball and compared to a reference piezoelectric acoustic emission transducer.

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Section: Advanced Materials and Applicationmentioning

confidence: 99%

Composite Materials Monitoring by Fiber Optic Sensors

Efimov

Volkovskiy

Куликов

et al. 2018

AMR

View full text Add to dashboard Cite

show abstract

“…В корпусе также размещались пьезокерамический фазовый модулятор, на который наматывался участок опорного плеча интерферометра, и оптоэлектронная плата, осуществ-ляющая прием и демодуляцию интерференционных сигналов. Для демодуляции интерференционных сигналов использовалась схема гомодинной демодуляции на основе вычисления значений функции арк-тангенса [22]. Схема демодуляции обеспечивала рабочую полосу частот волоконно-оптического гидро-фона от 50 Гц до 8 кГц [23][24][25].…”

Section: результаты экспериментального исследования защитного корпусаunclassified