Fiber-optic temperature sensor based on beat frequency and neural network algorithm

Tong, Xingxing; Shen, Yanxia; Mao, Xiaowei; Yu, Chao; Guo, Yu

doi:10.1016/j.yofte.2021.102783

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…The longitudinal mode interval of the laser beat frequency is determined by the length of the laser cavity. When the external heating or strain acts on the laser cavity, the length of the laser cavity will increase or shorten correspondingly, and the frequency of the multi-longitudinal mode (MLM) beat frequency signal (BFS) will shift [22][23][24][25]. However, these sensors based on single-cavity lasers with MLM beat frequency demodulation are generally less sensitive.…”

Section: Introductionmentioning

confidence: 99%

Optical fiber temperature sensor based on beat frequency and Vernier effect of fiber ring resonator composite cavity

Wang,

Li,

et al. 2023

Laser Phys.

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A fiber temperature sensing scheme based on beat frequency and Vernier effect of fiber ring resonator (FRR) with composite cavity is proposed and experimentally demonstrated. The optical FRR as a sensor is put into the linear cavity fiber laser, and Vernier effect is generated when the resonance spectrum of the optical FRR and the longitudinal mode of the laser are superimposed. The beat frequency envelope spectrum corresponding to the longitudinal mode Vernier spectrum is used to realize fiber ring sensing in electrical domain, and the sensing information is obtained by tracing the envelope of beat frequency signal, which has the advantages of stable system, simple structure, low cost and high sensitivity.

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Section: Introductionmentioning

confidence: 99%

Optical fiber temperature sensor based on beat frequency and Vernier effect of fiber ring resonator composite cavity

Wang,

Li,

et al. 2023

Laser Phys.

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“…A fiber optic sensor has the unique advantages of small size, high sensitivity, light weight, being immune to electromagnetic interference, and being easy to multiplex. Therefore, it has been widely used to measure various physical parameters of interest, such as pressure [ 1 , 2 , 3 , 4 , 5 ], temperature [ 4 , 5 , 6 , 7 , 8 , 9 ], salinity [ 7 , 10 , 11 ], as well as some kinematic parameters [ 12 , 13 , 14 , 15 , 16 ]. The fiber optic accelerometer, which takes the acceleration as the measurand, is one type of fiber optic sensor.…”

Section: Introductionmentioning

confidence: 99%

The Two-Stage Suspension System of the Fiber Optic Vector Hydrophone for Isolating the Vibration from the Mooring Rope

Zhang

Wang

et al. 2022

Sensors

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The two-stage suspension system (TSSS) is designed for the fiber optic vector hydrophone (FOVH) to isolate the vibration from the mooring rope. The acceleration transmissibility of the TSSS is studied theoretically and experimentally. The results show that the TSSS has a major advantage over the traditional one-stage suspension system (OSSS). Typically, the vibration isolation of the TSSS is demonstrated to be over 25 dB higher than that of the OSSS at 100 Hz. Meanwhile, it is demonstrated that the TSSS has little negative influence on the in-band acceleration response of the FOVH. The TSSS has the prospect of reducing the mechanical noise of the FOVH, which is conducive to suppressing the self-noise and enhancing the ability of weak signal detection.

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Intelligent inversion analysis of thermal parameters for distributed monitoring data

Bao

et al. 2023

Journal of Building Engineering

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Fiber-optic temperature sensor based on beat frequency and neural network algorithm

Cited by 11 publications

References 35 publications

Optical fiber temperature sensor based on beat frequency and Vernier effect of fiber ring resonator composite cavity

Optical fiber temperature sensor based on beat frequency and Vernier effect of fiber ring resonator composite cavity

The Two-Stage Suspension System of the Fiber Optic Vector Hydrophone for Isolating the Vibration from the Mooring Rope

Intelligent inversion analysis of thermal parameters for distributed monitoring data

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