IEC 61757-2-2:2016
(Main)Fibre optic sensors - Part 2-2: Temperature measurement - Distributed sensing
Fibre optic sensors - Part 2-2: Temperature measurement - Distributed sensing
IEC 61757-2-2:2016 defines detail specifications for distributed temperature measurement by a fibre optic sensor, also known as fibre optic distributed 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. Generic specifications for fibre optic sensors are defined in IEC 61757-1:2012. This part of IEC 61757 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 instrument 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 instrument and chosen optical test setup configuration. Annex B provides guidelines for optional determination of point defect effects. Keywords: fibre optic distributed temperature sensing (DTS)
This publication is to be read in conjunction with IEC 61757-1:2012
Capteurs à fibres optiques - Partie 2-2 : Mesure de température - Détection répartie
IEC 61757-2-2:2016 définit les spécifications particulières de la mesure de température répartie par un capteur à fibres optiques, également connue sous l’appellation détection de température répartie (DTS) à fibres optiques. La DTS utilise les effets des diffusions de Raman, de Brillouin et de Rayleigh. De plus, les mesures basées sur une diffusion de Raman ou de Rayleigh sont uniquement effectuées avec une configuration à fibre unique. Les mesures basées sur une diffusion de Brillouin sont effectuées avec une configuration à fibre unique ou à boucle de fibre. La technique accessible simultanément des deux extrémités [par exemple Brillouin optical time domain analysis, BOTDA (analyse à capteurs à fibres optiques répartis utilisant la diffusion Brillouin dans le domaine temporel)] est appelée ici configuration à boucle. Les spécifications génériques applicables aux capteurs à fibres optiques sont définies dans l’IEC 61757-1:2012. La présente partie de l’IEC 61757 spécifie les paramètres de performance les plus importants de la DTS et définit les procédures pour leur détermination. En plus du groupe de paramètres de performance, une liste de paramètres supplémentaires a été définie pour venir à l’appui de la définition des spécifications de mesure et de leurs procédures d’essai associées. Les définitions de ces paramètres supplémentaires sont fournies à titre d’information et il convient de les inclure dans les ensembles de paramètres de performance. Un montage d’essai général est défini et permet d’obtenir tous les paramètres par un ensemble d’essais. Les essais spécifiques sont décrits dans l’article pour chaque paramètre de mesure. Ce montage d’essai général est décrit à l’Article 4, ainsi qu’une liste d’informations générales qu’il convient de consigner en fonction de l’instrument DTS spécifique et du montage d’essai utilisé pour mesurer ces paramètres, conformément à l’IEC 61757-2-2. L’Annexe A fournit un tableau de paramètres de performance vierge dans lequel il convient de consigner les valeurs des paramètres de performance d’un instrument DTS donné et de la configuration choisie pour le montage d’essais optiques. L’Annexe B fournit des lignes directrices pour la détermination facultative des effets des défauts ponctuels.
Cette Norme internationale doit être utilisée conjointement avec l’IEC 61757-1:2012.
La présente version bilingue (2020-09) correspond à la version anglaise monolingue publiée en 2016-05.
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IEC 61757-2-2 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
colour
inside
Fibre optic sensors –
Part 2-2: Temperature measurement – Distributed sensing
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.99 ISBN 978-2-8322-3363-4
– 2 – IEC 61757-2-2:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 8
4 General test setups for measurement of performance parameters . 11
4.1 General and test setup requirements . 11
4.2 General required information to be documented . 13
5 Measurement procedures for performance parameters . 14
5.1 Temperature measurement error . 14
5.1.1 Test procedure and conditions . 14
5.1.2 Parameter calculation . 14
5.2 Spatial resolution . 16
5.2.1 Test procedure and conditions . 16
5.2.2 Parameter calculation . 17
5.3 Temperature repeatability . 17
5.3.1 Test procedure and conditions . 17
5.3.2 Parameter calculation . 18
5.3.3 Formulas . 19
5.4 Spatial temperature uncertainty . 19
5.4.1 Test procedure and conditions . 19
5.4.2 Parameter calculation . 19
5.5 Environmental temperature stability . 20
5.5.1 Test procedure and conditions . 20
5.5.2 Parameter calculation . 21
5.6 Warm-up time . 22
5.6.1 Test procedure and conditions . 22
5.6.2 Parameter calculation . 23
5.7 Attenuation range . 24
5.7.1 Test procedure and conditions . 24
5.7.2 Parameter calculation . 25
Annex A (informative) Measurement parameter performance table . 26
Annex B (informative) Point defect effects . 28
B.1 General . 28
B.2 Point defect. 28
B.3 Test procedures and conditions . 28
Bibliography . 31
Figure 1 – Example of a temperature trace with temperature sample points. 10
Figure 2 – General test setup: single-ended . 12
Figure 3 – General test setup: loop configuration . 12
Figure 4 – Temperature measurement error calculation: step 1 . 15
Figure 5 – Temperature measurement error calculation: steps 2 through 3 . 16
Figure 6 – Temperature measurement error calculation: steps 4 through 5 . 16
Figure 7 – Spatial resolution illustration . 17
Figure 8 – Temperature repeatability calculated from Figure 4 . 18
Figure 9 – Spatial temperature uncertainty calculated from Figure 4 . 20
Figure 10 – Environmental temperature cycle (example for a DTS instrument with an
operating temperature range of 0 °C to 40 °C) . 21
Figure 11 – Environmental temperature stability parameter calculation method . 22
Figure 12 – Example illustrating calculation of warm-up time. 23
Figure B.1 – Point defect measurement (example) . 29
Table A.1 – Blank measurement parameter performance table . 26
– 4 – IEC 61757-2-2:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC SENSORS –
Part 2-2: Temperature measurement – Distributed sensing
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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International Standard IEC 61757-2-2 has been prepared by subcommittee SC 86C: Fibre
optic systems and active devices of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
CDV Report on voting
86C/1323/CDV 86C/1354/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61757 series, published under the general title Fibre optic
sensors, can be found on the IEC website.
This International Standard is to be used in conjunction with IEC 61757-1:2012.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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– 6 – IEC 61757-2-2:2016 © IEC 2016
INTRODUCTION
It has been decided to restructure the IEC 61757 series with the following logic. From now on,
the sub-parts will be renumbered as IEC 61757-M-T where M denotes the m
...
IEC 61757-2-2 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
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INTERNATIONALE
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inside
Fibre optic sensors –
Part 2-2: Temperature measurement – Distributed sensing
Capteurs à fibres optiques –
Partie 2-2: Mesure de température – Détection répartie
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IEC 61757-2-2 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic sensors –
Part 2-2: Temperature measurement – Distributed sensing
Capteurs à fibres optiques –
Partie 2-2: Mesure de température – Détection répartie
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.99 ISBN 978-2-8322-8787-3
– 2 – IEC 61757-2-2:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General test setups for measurement of performance parameters . 11
4.1 General and test setup requirements . 11
4.2 General required information to be documented . 13
5 Measurement procedures for performance parameters . 14
5.1 Temperature measurement error . 14
5.1.1 Test procedure and conditions . 14
5.1.2 Parameter calculation . 14
5.2 Spatial resolution . 16
5.2.1 Test procedure and conditions . 16
5.2.2 Parameter calculation . 16
5.3 Temperature repeatability . 17
5.3.1 Test procedure and conditions . 17
5.3.2 Parameter calculation . 17
5.3.3 Formulas . 18
5.4 Spatial temperature uncertainty . 19
5.4.1 Test procedure and conditions . 19
5.4.2 Parameter calculation . 19
5.5 Environmental temperature stability . 20
5.5.1 Test procedure and conditions . 20
5.5.2 Parameter calculation . 21
5.6 Warm-up time . 22
5.6.1 Test procedure and conditions . 22
5.6.2 Parameter calculation . 23
5.7 Attenuation range . 24
5.7.1 Test procedure and conditions . 24
5.7.2 Parameter calculation . 25
Annex A (informative) Measurement parameter performance table . 26
Annex B (informative) Point defect effects . 28
B.1 General . 28
B.2 Point defect . 28
B.3 Test procedures and conditions . 28
Bibliography . 31
Figure 1 – Example of a temperature trace with temperature sample points . 10
Figure 2 – General test setup: single-ended . 12
Figure 3 – General test setup: loop configuration . 12
Figure 4 – Temperature measurement error calculation: step 1 . 15
Figure 5 – Temperature measurement error calculation: steps 2 through 3 . 15
Figure 6 – Temperature measurement error calculation: steps 4 through 5 . 16
Figure 7 – Spatial resolution illustration . 17
Figure 8 – Temperature repeatability calculated from Figure 4 . 18
Figure 9 – Spatial temperature uncertainty calculated from Figure 4 . 20
Figure 10 – Environmental temperature cycle (example for a DTS instrument with an
operating temperature range of 0 °C to 40 °C) . 21
Figure 11 – Environmental temperature stability parameter calculation method . 22
Figure 12 – Example illustrating calculation of warm-up time . 23
Figure B.1 – Point defect measurement (example) . 29
Table A.1 – Blank measurement parameter performance table . 26
– 4 – IEC 61757-2-2:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC SENSORS –
Part 2-2: Temperature measurement – Distributed sensing
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its
...
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