{"id":408952,"date":"2024-10-20T05:33:15","date_gmt":"2024-10-20T05:33:15","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-61757-3-22022\/"},"modified":"2024-10-26T10:09:29","modified_gmt":"2024-10-26T10:09:29","slug":"bs-en-iec-61757-3-22022","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-61757-3-22022\/","title":{"rendered":"BS EN IEC 61757-3-2:2022"},"content":{"rendered":"

This part of IEC 61757 specifies terminology, characteristic performance parameters, related test and calculation methods, and specific test equipment for interrogation units used in distributed fibre optic acoustic sensing and vibration measurement systems. This document refers to Rayleigh backscatter and phase detection method by phase-sensitive coherent optical time-domain reflectometry (\u03d5-OTDR) only. Quasi-static and low frequency operation modes are not covered by this document. Generic specifications for fibre optic sensors are defined in IEC 61757.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
6<\/td>\nBlank Page <\/td>\n<\/tr>\n
7<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
10<\/td>\nFOREWORD <\/td>\n<\/tr>\n
12<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
13<\/td>\n1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions <\/td>\n<\/tr>\n
14<\/td>\nFigures
Figure 1 \u2013 Distributed acoustic sensing system <\/td>\n<\/tr>\n
16<\/td>\n3.2 Abbreviated terms <\/td>\n<\/tr>\n
17<\/td>\n3.3 Symbols
Figure 2 \u2013 Signal parameters relating to time series and their spatial point identification <\/td>\n<\/tr>\n
18<\/td>\n4 Performance parameters of a distributed acoustic sensing system
5 Test apparatus for performance parameter determination
5.1 Simulated fibre sensor (SFS) <\/td>\n<\/tr>\n
19<\/td>\n5.2 Fibre stretcher
Figure 3 \u2013 Simulated fibre sensor
Figure 4 \u2013 Configuration for SFS showing the locations TP1, TP2, and TP3 <\/td>\n<\/tr>\n
20<\/td>\n5.3 Signal generation and amplification instrumentation
5.4 Optical attenuator
5.5 Isolation chamber <\/td>\n<\/tr>\n
21<\/td>\n6 Test procedures of performance parameters
6.1 General
6.2 Dynamic range
6.2.1 General
6.2.2 Set-up
6.2.3 Stimulus
Figure 5 \u2013 Test set-up for dynamic range test <\/td>\n<\/tr>\n
22<\/td>\n6.2.4 Data collection and processing <\/td>\n<\/tr>\n
23<\/td>\nFigure 6 \u2013 Example of a strain stimulus signal andrecovered phase of IU response with a limit at 17 s <\/td>\n<\/tr>\n
24<\/td>\n6.2.5 Data reporting
6.3 Frequency response
6.3.1 General
6.3.2 Set-up
Figure 7 \u2013 Example of a zoom view of strain stimulus signal andrecovered phase of IU response showing a phase jump at 16,98 s <\/td>\n<\/tr>\n
25<\/td>\n6.3.3 Stimulus
6.3.4 Data collection and processing
Figure 8 \u2013 Test set-up for frequency response test <\/td>\n<\/tr>\n
26<\/td>\n6.3.5 Data reporting
Figure 9 \u2013 Magnitude response showing the 40 stimulus signals all with magnitude <\/td>\n<\/tr>\n
27<\/td>\nFigure 10 \u2013 Interrogation unit response to test stimulus,scaled in strain units, shown in the frequency domain <\/td>\n<\/tr>\n
28<\/td>\n6.4 Fidelity
6.4.1 General
6.4.2 Set-up
6.4.3 Stimulus
Figure 11 \u2013 Interrogation unit normalized frequency response
Figure 12 \u2013 Test set-up for fidelity test <\/td>\n<\/tr>\n
29<\/td>\n6.4.4 Data collection and processing
6.4.5 Data reporting
6.5 Self-noise
6.5.1 General
6.5.2 Set-up <\/td>\n<\/tr>\n
30<\/td>\n6.5.3 Stimulus
6.5.4 Data collection and processing
Figure 13 \u2013 Test set-up for self-noise <\/td>\n<\/tr>\n
31<\/td>\nFigure 14 \u2013 2D data field representing the time varyingacoustic field as a function of distance <\/td>\n<\/tr>\n
32<\/td>\nFigure 15 \u2013 System noise floor data processing schematic <\/td>\n<\/tr>\n
33<\/td>\n6.5.5 Data reporting
6.6 Spatial resolution
6.6.1 General
Figure 16 \u2013 Example plot of self-noise data <\/td>\n<\/tr>\n
34<\/td>\n6.6.2 Set-up
6.6.3 Stimulus
6.6.4 Data collection and processing
Figure 17 \u2013 Test set-up for spatial resolution test <\/td>\n<\/tr>\n
35<\/td>\n6.6.5 Data reporting
Figure 18 \u2013 Spatial sample points to be used for spatial resolution evaluation <\/td>\n<\/tr>\n
36<\/td>\nFigure 19 \u2013 Graphical plotting approach used to determine spatial resolution <\/td>\n<\/tr>\n
37<\/td>\n6.7 Crosstalk
6.7.1 General
6.7.2 Set-up
6.7.3 Stimulus
6.7.4 Data collection and processing
Figure 20 \u2013 Test set-up for crosstalk measurement <\/td>\n<\/tr>\n
38<\/td>\n6.7.5 Data reporting
6.8 Loss budget
6.8.1 General
Figure 21 \u2013 Highlighted points to be sampled for crosstalk test
Figure 22 \u2013 Example plot for crosstalk test results <\/td>\n<\/tr>\n
39<\/td>\n6.8.2 Set-up
6.8.3 Stimulus
6.8.4 Data collection and processing
6.8.5 Data reporting
Figure 23 \u2013 Test set-up for loss budget test <\/td>\n<\/tr>\n
40<\/td>\n6.9 Sensor reflection robustness
6.9.1 General
6.9.2 Set-up <\/td>\n<\/tr>\n
41<\/td>\nFigure 24 \u2013 Test configurations for sensor reflection robustness <\/td>\n<\/tr>\n
42<\/td>\n6.9.3 Stimulus
Figure 25 \u2013 Fabrication examples for creating partial reflections <\/td>\n<\/tr>\n
43<\/td>\n6.9.4 Data collection, processing, and reporting <\/td>\n<\/tr>\n
44<\/td>\nAnnex A (informative)Conversion of optical phase measurement to strain <\/td>\n<\/tr>\n
46<\/td>\nTable A.1 \u2013 Optical phase and strain relationships <\/td>\n<\/tr>\n
47<\/td>\nAnnex B (normative)Requirements for low uncertainty measurement
B.1 Single tone stimulus testing
Figure B.1 \u2013 Fibre stretcher spatial sample points <\/td>\n<\/tr>\n
48<\/td>\nB.2 Frequency response testing
Figure B.2 \u2013 Frequency domain plot of single tone stimulus <\/td>\n<\/tr>\n
49<\/td>\nFigure B.3 \u2013 Frequency response plot of single tone stimulus <\/td>\n<\/tr>\n
50<\/td>\nAnnex C (informative)FFT window functions
C.1 Flat-top window used for frequency domain measurements of spectral peaks
Figure C.1 \u2013 Flat-top window and its Fourier transform characteristics <\/td>\n<\/tr>\n
51<\/td>\nC.2 Window functions used for frequency domain noise measurements
Figure C.2 \u2013 Blackman-Harris window and its Fourier transform characteristics <\/td>\n<\/tr>\n
52<\/td>\nFigure C.3 \u2013 Hamming window and its Fourier transform characteristics <\/td>\n<\/tr>\n
54<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Fibre optic sensors – Acoustic sensing and vibration measurement. Distributed sensing<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2022<\/td>\n56<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":408960,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[650,2641],"product_tag":[],"class_list":{"0":"post-408952","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-180-20","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/408952","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/408960"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=408952"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=408952"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=408952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}