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High spatial resolution microwave detection system for Brillouin-based distributed temperature and strain sensors

High spatial resolution microwave detection system for Brillouin-based distributed temperature and strain sensors
High spatial resolution microwave detection system for Brillouin-based distributed temperature and strain sensors
We present a microwave detection system for coherent detection of spontaneous Brillouin-based distributed temperature and strain measurements. The system was designed to overcome the existing bandwidth limitations of a previously used commercial spectrum analyser and provide a commercially practical solution to the detection of the Brillouin frequency shift and intensity for long range high spatial resolution measurements. The detection system bandwidth corresponds to a potential spatial resolution of ~60 cm. The system was demonstrated as a temperature sensor over a range of 30 km, with a temperature resolution of 1.6 °C and spatial resolution of ~2 m. It was also demonstrated as a combined temperature and strain sensor over a range of 6.3 km with ~1.3 m spatial resolution; temperature and strain resolutions of 3 °C and 80 µ.epsilon respectively were achieved.
0957-0233
1539-1543
Alahbabi, M.N.
d1831f9f-7696-4b27-86f2-d9cc7f8c00e7
Lawrence, N.P.
5b5e4062-5aee-4514-8f76-3147c0db1c93
Cho, Y.T.
eea77b90-e7f3-4496-9637-721dfe8fb5a4
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
Alahbabi, M.N.
d1831f9f-7696-4b27-86f2-d9cc7f8c00e7
Lawrence, N.P.
5b5e4062-5aee-4514-8f76-3147c0db1c93
Cho, Y.T.
eea77b90-e7f3-4496-9637-721dfe8fb5a4
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7

Alahbabi, M.N., Lawrence, N.P., Cho, Y.T. and Newson, T.P. (2004) High spatial resolution microwave detection system for Brillouin-based distributed temperature and strain sensors. Measurement Science and Technology, 15 (8), 1539-1543. (doi:10.1088/0957-0233/15/8/019).

Record type: Article

Abstract

We present a microwave detection system for coherent detection of spontaneous Brillouin-based distributed temperature and strain measurements. The system was designed to overcome the existing bandwidth limitations of a previously used commercial spectrum analyser and provide a commercially practical solution to the detection of the Brillouin frequency shift and intensity for long range high spatial resolution measurements. The detection system bandwidth corresponds to a potential spatial resolution of ~60 cm. The system was demonstrated as a temperature sensor over a range of 30 km, with a temperature resolution of 1.6 °C and spatial resolution of ~2 m. It was also demonstrated as a combined temperature and strain sensor over a range of 6.3 km with ~1.3 m spatial resolution; temperature and strain resolutions of 3 °C and 80 µ.epsilon respectively were achieved.

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Published date: 2004

Identifiers

Local EPrints ID: 13915
URI: https://eprints.soton.ac.uk/id/eprint/13915
ISSN: 0957-0233
PURE UUID: 9e074a66-671c-444d-add0-4e9db0db5fd8

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Date deposited: 13 Jan 2005
Last modified: 17 Jul 2017 16:59

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Contributors

Author: M.N. Alahbabi
Author: N.P. Lawrence
Author: Y.T. Cho
Author: T.P. Newson

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