Monitoring of a Highly Flexible Aircraft Model Wing Using Time-Expanded Phase-Sensitive OTDR

Soriano-Amat, Miguel; Fragas-Sánchez, David; Martins, Hugo F.; Vallespín-Fontcuberta, David; Preciado-Garbayo, Javier; Martín‐López, Sonia; González‐Herráez, Miguel; Fernández‐Ruiz, María R.

doi:10.3390/s21113766

Cited by 14 publications

(4 citation statements)

References 29 publications

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“…In that work, strain measurements with resolution of 2 cm, and sampling rate of 2 kHz were performed over a shorter fiber range of 3.56 m. Results are shown in Figure 2B. The technique has been evaluated for monitoring the bonding, torsion and vibration of a model of wing of an UAV in (Soriano-Amat et al, 2021a). For this purpose, an appropriate topology of fiber cable was glued on the wing (shown in the inset of Figure 2C) in order to measure any 2D perturbation.…”

Section: Resultsmentioning

confidence: 99%

High Resolution Distributed Optical Fiber Sensing Using Time-Expanded Phase-Sensitive Reflectometry

Fernández‐Ruiz¹,

Soriano-Amat²,

Martins³

et al. 2022

Front. Sens.

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We have demonstrated a novel scheme for distributed optical fiber sensing based on the use of a dual frequency comb, which enables the development of a high-resolution (in the cm range) distributed sensor with significantly relaxed electronic requirements compared with previous schemes. This approach offers a promising solution for real time structure monitoring in a variety of fields, including transportation, manufacturing or mechatronics. In this work, we review the principle of operation of the technique, recent advances to improve its performance and different experimental tests.

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Section: Resultsmentioning

confidence: 99%

High Resolution Distributed Optical Fiber Sensing Using Time-Expanded Phase-Sensitive Reflectometry

Fernández‐Ruiz¹,

Soriano-Amat²,

Martins³

et al. 2022

Front. Sens.

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“…Phase-sensitive optical time-domain reflectometry (Φ-OTDR) has garnered increasing interest in recent years as a powerful detection method. It boasts several advantages, such as quantitative measurement [1,2], a broadband response [3,4], and high sensitivity [5,6], making it widely used in geological exploration [7,8], structural health monitoring [9,10], and intrusion detection [11,12]. Despite its strengths, Φ-OTDR systems that rely on Rayleigh backscattering for sensing face limitations due to the weak intensity of RBS light.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Rayleigh Scattering in UWFBG Array-Based Φ-OTDR and Its Suppression Method

Wang

Yan

Hong

et al. 2023

Sensors

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Ultra-weak fiber Bragg grating (UWFBG) array-based phase-sensitive optical time-domain reflectometry (Φ-OTDR) utilizes the interference interaction between the reference light and the reflected light from the broadband gratings for sensing. It significantly improves the performance of the distributed acoustic sensing system (DAS) because the intensity of the reflected signal is much higher than that of the Rayleigh backscattering. This paper shows that Rayleigh backscattering (RBS) has become one of the primary noise sources in the UWFBG array-based Φ-OTDR system. We reveal the impact of the Rayleigh backscattering signal on the intensity of the reflective signal and the precision of the demodulated signal, and we suggest reducing the pulse duration to improve the demodulation accuracy. Experimental results demonstrate that using light with a 100 ns pulse duration can improve the measurement precision by three times compared with the use of a 300 ns pulse duration.

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“…ISTRIBUTED acoustic sensing (DAS) is a technology that uses the in-fiber backscattered light to locate and measure the dynamic micro-strain caused by sound applied to an optical fiber [1][2][3][4]. Due to its outstanding advantages such as high sensitivity, long sensing range, light weight, compatibility with telecom fibers and excellent robustness in harsh environments [5][6][7], DAS has found applications in various areas including oil and gas detection [8], perimeter intrusion detection [9], railway monitoring [10] and structural health monitoring [11]. Recently, DAS has also been successfully demonstrated in seismic detection caused by earthquake, ocean wave propagation and glacial activities [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A High-Performance DAS System Using Point-Backscattering-Enhanced Fiber and Study of Its Noise Characteristics

Li,

Ma,

Zhuang

et al. 2023

IEEE Sensors J.

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Distributed acoustic sensing (DAS) system with point-backscattering-enhanced fiber (PBSEF) has the capability of breaking the signal to noise ratio limit of traditional DAS, therefore, it would become one of the most powerful DAS technologies and expand the applications of DAS systems. To optimize the performance when designing DAS system with PBSEF, it is crucial to understand the relationship between the system noise and the reflectance enhancement, which is yet to be systematically studied. In this paper, both experimental investigation and theoretical analysis of a typical 33 heterodyne DAS system with PBSEF were carried out. The relationship between system noise level and the reflectance enhancement was studied by both experiments and simulations. And the results, with good agreements between each other, show that the system noise level drops exponentially as the reflectance increases. With 29.7 dB reflectance enhancement, the system noise level decreased from 9.5 pε/√Hz to 0.44 pε/√Hz. The influences of intensity noise and phase noise were also analyzed based on the theoretical model. The findings of the quantitative relationship and the noise influence can be used as a universal guidance for the design of PBSEF-based high performance DAS systems.

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Monitoring of a Highly Flexible Aircraft Model Wing Using Time-Expanded Phase-Sensitive OTDR

Cited by 14 publications

References 29 publications

High Resolution Distributed Optical Fiber Sensing Using Time-Expanded Phase-Sensitive Reflectometry

High Resolution Distributed Optical Fiber Sensing Using Time-Expanded Phase-Sensitive Reflectometry

The Impact of Rayleigh Scattering in UWFBG Array-Based Φ-OTDR and Its Suppression Method

A High-Performance DAS System Using Point-Backscattering-Enhanced Fiber and Study of Its Noise Characteristics

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