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BS EN 61757-2-2 ED2 Fibre optic sensors. Part 2-2: Temperature measurement - Distributed sensing

Source:
IEC
Committee:
GEL/86/3 - Fibre optic systems and active devices
Categories:
Fibre optic systems. General
Comment period start date:
Comment period end date:
Number of comments:
0

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Scope

This part of IEC 61757 defines the terminology, structure, and measurement methods of distributed fibre optic sensors for temperature sensing (DTS). DTS includes the use of Raman scattering, Brillouin scattering and Rayleigh scattering effects. In addition, Raman scattering and Rayleigh scattering based measurements are performed with a single-ended fibre configuration only. Brillouin scattering based measurements are performed with a single-ended fibre or fibre loop configuration. The technique accessible from both sides at same time (e. g. Brillouin optical time domain analysis, BOTDA) is referred to here as a loop configuration.

This document specifies the most important DTS performance parameters and defines the procedures for their determination. In addition to the group of performance parameters, a list of additional parameters has been defined to support the definition of the measurement specifications and their associated test procedures. The definitions of these additional parameters are provided for informational purposes and should be included with the sets of performance parameters.

A general test setup is defined in which all parameters can be gathered through a set of tests. The specific tests are described within the clause for each measurement parameter. This general test setup is depicted and described in Clause 4 along with a list of general information that should be documented based upon the specific DTS interrogation unit (DTS-IU) and test setup used to measure these parameters as per IEC 61757-2-2.

Annex A provides a blank performance parameter table which should be used to record the performance parameter values for a given DTS-IU and chosen optical test setup configuration.

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