Review of a Specialty Fiber for Distributed Acoustic Sensing Technology

Sun, Yixiang; Li, Hao; Fan, Cunzheng; Yan, Binbin; Chen, Junfeng; Yan, Zhijun; Sun, Qizhen

doi:10.3390/photonics9050277

Cited by 37 publications

(27 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…DAS provides a brand new tool for tunnel health monitoring [ 93 , 94 , 95 ]. Based on a scattering-enhanced fiber-optic DAS system, Hu et al performed the intelligent monitoring of a tunnel ring [ 94 ].…”

Section: Applications Of Das In Linear Infrastructure Monitoringmentioning

confidence: 99%

Distributed Acoustic Sensing for Monitoring Linear Infrastructures: Current Status and Trends

Zhu

Liu

Wang

et al. 2022

Sensors

View full text Add to dashboard Cite

Linear infrastructures, such as railways, tunnels, and pipelines, play essential roles in economic and social development worldwide. However, under the influence of geohazards, earthquakes, and human activities, linear infrastructures face the potential risk of damage and may not function properly. Current monitoring systems for linear infrastructures are mainly based on non-contact detection (InSAR, UAV, GNSS, etc.) and geotechnical instrumentation (extensometers, inclinometers, tiltmeters, piezometers, etc.) techniques. Regarding monitoring sensitivity, frequency, and coverage, most of these methods have some shortcomings, which make it difficult to perform the accurate, real-time, and comprehensive monitoring of linear infrastructures. Distributed acoustic sensing (DAS) is an emerging sensing technology that has rapidly developed in recent years. Due to its unique advantages in long-distance, high-density, and real-time monitoring, DAS arrays have shown broad application prospects in many fields, such as oil and gas exploration, seismic observation, and subsurface imaging. In the field of linear infrastructure monitoring, DAS has gradually attracted the attention of researchers and practitioners. In this paper, recent research and the development activities of applying DAS to monitor different types of linear infrastructures are critically reviewed. The sensing principles are briefly introduced, as well as the main features. This is followed by a summary of recent case studies and some critical problems associated with the implementation of DAS monitoring systems in the field. Finally, the challenges and future trends of this research area are presented.

show abstract

Section: Applications Of Das In Linear Infrastructure Monitoringmentioning

confidence: 99%

Distributed Acoustic Sensing for Monitoring Linear Infrastructures: Current Status and Trends

Zhu

Liu

Wang

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…With the maturity of fiber optic sensing technology, the application field of optical fiber sensing continues to expand. Fiber optic acoustic sensing has been widely studied and applied in the fields of intrusion detection, environmental noise monitoring and other fields because of its excellent environmental tolerance, such as anti-electromagnetic interference and anticorrosion [ 1 , 2 , 3 , 4 ]. Among much research on acoustic sensing, the acoustic sensing system based on Sagnac interference is favored by researchers, because it has high sensitivity, a high signal-to-noise rate and, especially, can be applied in harsh environments [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

An Improved Acoustic Pick-Up for Straight Line-Type Sagnac Fiber Optic Acoustic Sensing System

Chen

Wang

et al. 2022

Sensors

View full text Add to dashboard Cite

An improved acoustic pick-up is presented to enhance the acoustic sensing sensitivity of the straight line-type Sagnac fiber optic acoustic sensing system. A hollow elastomer cylinder is introduced into the system, and the optical fiber is tightly wound around the cylinder to construct the pick-up. The theoretical analysis was finished, and it showed that the improved pick-up will bring in an extra phase change and let the phase difference increase almost an order. The extra phase change will enhance the sensing sensitivity correspondingly. The titanium alloy elastic cylinder was designed and manufactured. The experiment system was built, and a sinusoidal acoustic signal was used as the sound source. The tests were taken during 100–1500 Hz, and the experimental study showed that the sensitivity was more than 130 mV/Pa when the pick-up was used as the acoustic sensing element, and compared to the fiber only system, the sensitivity was enhanced more than 71.2%. The improved pick-up will be helpful in sound recognition and expand the application area of the Sagnac acoustic sensing system.

show abstract

“…Fiber distributed acoustic sensor (DAS) based on Rayleigh scattering employs lowcost, existing common single-mode fiber (SMF) to achieve quantitative acoustic measurement of long distance, high spatial resolution, and high sensitivity [1] [2]. These advantages make DAS widely used in fields such as third-party interference (TPI) and leakage detection of pipelines [1] [3], seismic [4] [5], perimeter safety [6] [7], traffic flow [8] [9], etc.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the sensitivity of the φOTDR used in seismic is still far lower than that of the traditional geophone [1]. Recently, more work turned to increase the distributed backscattering throughout the fiber, substantially improving the sensitivity and significantly suppressing the fading [2] [13]. But it is still a great challenge for DAS to detect ultra-weak sounds like airborne sounds.…”

Section: Introductionmentioning

confidence: 99%

Air Acoustic Sensing based on High-performance DAS and Ultra-simple Transducer Structure

Tang¹,

Hu²,

Zheng³

et al. 2022

Preprint

View full text Add to dashboard Cite

Fiber distributed optical fiber acoustic sensor (DAS) is generally used in distributed long-distance acoustic/vibration measurement. We found that DAS with excellent performance of low self-noise and anti-fading in combination with the plastic structure in daily life as an acoustic transducer can achieve high-sensitivity acoustic measurement at a single point rather than designing a state-of-the-art acoustic transducer or using special enhanced scattering fiber. The simple acoustic transducer we proposed for DAS can reach the sensitivity level of -106.5dB re. 1rad/μPa at a sensing range of 5.1 km, which can meet many demands on the industrial site.

show abstract

Review of a Specialty Fiber for Distributed Acoustic Sensing Technology

Cited by 37 publications

References 89 publications

Distributed Acoustic Sensing for Monitoring Linear Infrastructures: Current Status and Trends

Distributed Acoustic Sensing for Monitoring Linear Infrastructures: Current Status and Trends

An Improved Acoustic Pick-Up for Straight Line-Type Sagnac Fiber Optic Acoustic Sensing System

Air Acoustic Sensing based on High-performance DAS and Ultra-simple Transducer Structure

Contact Info

Product

Resources

About