IEC_61685-2001.pdf

INTERNATIONALSTANDARDIEC61685First edition2001-07Ultrasonics Flow measurement systems Flow test objectUltrasons Systmes de mesure de dbit Montage pour essai de dbitReference numberIEC 61685:2001(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(www.iec.ch/catlg-e.htm)enablesyou to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just PublishedThis summary of recently issued publications(www.iec.ch/JP.htm)is alsoavailable by email.Please contact the Customer Service Centre(see below)forfurther information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC61685First edition2001-07Ultrasonics Flow measurement systems Flow test objectUltrasons Systmes de mesure de dbit Montage pour essai de dbitPRICE CODE IEC 2001 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300e-mail:inmailiec.ch IEC web site http:/www.iec.chWFor price,see current catalogue Commission Electrotechnique Internationale International Electrotechnical CommissionLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61685 IEC:2001(E)CONTENTSFOREWORD.4INTRODUCTION.51Scope.62Normative references.63Definitions.64List of symbols.115General outline of flow Doppler test object.126Specification of the flow Doppler test object.126.1General.126.2Blood-mimicking fluid(BMF).136.3Tube.146.4Tissue-mimicking material(TMM).156.5Geometry.157Precautions to prevent changes in the composition of the blood-mimicking fluid(BMF).158Specifications for labelling.16Annex A(informative)Rationale concerning the position of this standard.17Annex B(normative)Formulae relating various quantities.20Annex C(informative)Rationale for the numerical values chosen in this standard.21Annex D(informative)Description of an example flow Doppler test object.23Annex E(informative)Schematic diagram of a possible flow circuit.32Annex F(informative)Measuring methods.33Bibliography.34Figure 1 Three configurations for Doppler flow test objects.12Figure D.1 The main elements of a flow test object.24Figure D.2 Backscattering coefficient of BMF as a function of frequency.26Figure D.3 Attenuation of TMM(?)and BMF(?)as a function of frequency.26Figure D.4 Attenuation of ultrasound by material of tube wall,as a function offrequency.27Figure D.5 Deformation of velocity spectrum of parabolic flow by attenuation due totube wall(wall thickness 1,5 mm).28Figure D.6 Backscattering coefficient of two samples of TMM as a function offrequency.29Figure D.7 The quotient of attenuation by TMM(1-way passage)and frequency as afunction of frequency.29Figure D.8 Testing for penetration depth.31Figure E.1 Schematic diagram of a possible flow circuit,showing the place of the flowDoppler test object.32LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61685 IEC:2001(E)3 Table 1 Typical ranges of parameters for blood at 37 C,where f is the acoustic-working frequency in hertz.13Table 2 Specification of blood-mimicking fluid(BMF).13Table 3 Parameters of tissue-mimicking material(TMM).15Table A.1 Parameters