AI Article Synopsis
- The proposed technique combines two methods, φ-OTDR and BOTDR, to create a distributed dynamic absolute strain sensing system.
- It achieves high sensitivity and fast sampling while also measuring absolute strain values and providing a wide dynamic range.
- Experimental results show it can measure strain dynamically up to over 2500 µɛ with a wide frequency response (0.1 to over 30 Hz) across a sensing distance of around 1 kilometer.
Article Abstract
We propose and demonstrate a high-performance distributed dynamic absolute strain sensing technique by synthesizing φ-OTDR and BOTDR. The technique synthesizes the relative strain obtained by the φ-OTDR part and the initial strain offset estimated by fitting the relative strain with the absolute strain signal from the BOTDR part. As a result, it provides not only the characteristics of high sensing accuracy and high sampling rate like φ-OTDR, but also the absolute strain measurement and the large sensing dynamic range like BOTDR. The experiment results indicate the proposed technique can realize the distributed dynamic absolute strain sensing with a sensing dynamic range of over 2500 µɛ, a peak-to-peak amplitude of 1165 µɛ, and a wide frequency response range from 0.1 to over 30 Hz over a sensing range of about 1 km.
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| http://dx.doi.org/10.1364/OE.484529 | DOI Listing |
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