Repetition Rate and Gauge Length Impact on DTGS Temperature Reconstruction

Article Engineering, Electrical & Electronic

Measurement of Gas-Phase Velocities in Two-Phase Flow Using Distributed Acoustic Sensing

Guilherme Heim Weber et al.

Summary: This article introduces the use of distributed acoustic sensing (DAS) for the measurement of slug flow. Experimental measurements were carried out in a horizontal pipeline using fiber optics wrapped along the outer surface to estimate the velocity of the gas phase. The results showed a root-mean-square deviation of 8.34% and 12.18% compared to a commercial conductance-based sensor.

IEEE SENSORS JOURNAL (2023)

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Article Engineering, Electrical & Electronic

Optical Fiber Serpentine Arrangements for Vibration Analysis Using Distributed Acoustic Sensing

Frederico A. Jahnert et al.

Summary: This article presents a novel method for measuring local dynamic strain of structures using distributed acoustic sensors (DASs). Experimental results show that using a serpentine configuration can significantly improve the accuracy of DAS measurements and increase the peak-to-noise ratio.

IEEE SENSORS JOURNAL (2022)

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Article Engineering, Electrical & Electronic

Enhanced Temperature Measurement Performance: Fusing DTS and DAS Results

Thomas Lauber et al.

Summary: This paper presents a method for fusing temperature measurements from different fiber sensing technologies, combining the accuracy of Raman-Distributed Temperature Sensing with the noise properties and sensitivity to temperature gradients of coherent Rayleigh backscatter based Distributed Acoustic Sensing. The fusion result, implemented using Kalman filters, improves temperature resolution by more than three times compared to DTS only, providing more accurate absolute temperature results and faster response to temperature events, especially over long distances.

IEEE SENSORS JOURNAL (2021)

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Review Chemistry, Analytical