Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz

Ultraschall - Hydrophone - Teil 2: Kalibrierung für Ultraschallfelder bis zu 40 MHz

Ultrasons - Hydrophones - Partie 2: Etalonnage des champs ultrasoniques jusqu'à 40 Mhz

Ultrazvok - Hidrofoni - 2. del: Kalibracija za ultrazvočna polja do 40 MHz - Dopolnilo A2 (IEC 62127-2:2007/A2:2017)

General Information

Status
Published
Publication Date
15-Jun-2017
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
01-Jan-2018

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EN 62127-2:2008/A2:2017
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SLOVENSKI STANDARD
SIST EN 62127-2:2008/A2:2017
01-september-2017
8OWUD]YRN+LGURIRQLGHO.DOLEUDFLMD]DXOWUD]YRþQDSROMDGR0+]
'RSROQLOR$ ,(&$

Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz (IEC

62127-2:2007/A2:2017)

Ultraschall - Hydrophone - Teil 2: Kalibrierung für Ultraschallfelder bis zu 40 MHz (IEC

62127-2:2007/A2:2017)

Ultrasons - Hydrophones - Partie 2: Etalonnage des champs ultrasoniques jusqu'à 40

Mhz (IEC 62127-2:2007/A2:2017)
Ta slovenski standard je istoveten z: EN 62127-2:2007/A2:2017
ICS:
11.040.01 Medicinska oprema na Medical equipment in general
splošno
17.140.50 Elektroakustika Electroacoustics
SIST EN 62127-2:2008/A2:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62127-2:2008/A2:2017
---------------------- Page: 2 ----------------------
SIST EN 62127-2:2008/A2:2017
EUROPEAN STANDARD EN 62127-2:2007/A2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2017
ICS 17.140.50
English Version
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic
fields up to 40 MHz
(IEC 62127-2:2007/A2:2017)

Ultrasons - Hydrophones - Partie 2: Etalonnage des Ultraschall - Hydrophone - Teil 2: Kalibrierung für

champs ultrasoniques jusqu'à 40 Mhz Ultraschallfelder bis zu 40 MHz
(IEC 62127-2:2007/A2:2017) (IEC 62127-2:2007/A2:2017)

This amendment A2 modifies the European Standard EN 62127-2:2007; it was approved by CENELEC on 2017-04-26. CENELEC

members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the

status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the

responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as

the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62127-2:2007/A2:2017 E
---------------------- Page: 3 ----------------------
SIST EN 62127-2:2008/A2:2017
EN 62127-2:2007/A2:2017
European foreword

The text of document 87/612/CDV, future IEC 62127-2:2007/A2, prepared by IEC/TC 87 "Ultrasonics"

was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62127-

2:2007/A2:2017.
The following dates are fixed:
• latest date by which the document has to be (dop) 2018-01-26
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2020-04-26
• latest date by which the national
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 62127-2:2007/A2:2017 was approved by CENELEC as a

European Standard without any modification.
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SIST EN 62127-2:2008/A2:2017
EN 62127-2:2007/A2:2017
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Addition:
Publication Year Title EN/HD Year
IEC 61689 - Ultrasonics - Physiotherapy systems - Field EN 61689 -
specifications and methods of
measurement in the frequency range 0,5
MHz to 5 MHz
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SIST EN 62127-2:2008/A2:2017
---------------------- Page: 6 ----------------------
SIST EN 62127-2:2008/A2:2017
IEC 62127-2
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 2
AM ENDEMENT 2
Ultrasonics – Hydrophones –
Part 2: Calibration for ultrasonic fields up to 40 MHz
Ultrasons – Hydrophones –
Partie 2: Etalonnage des champs ultrasoniques jusqu’à 40 MHz
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8322-3904-9

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 62127-2:2008/A2:2017
– 2 – IEC 62127-2:2007/AMD2:2017
© IEC 2017
FOREWORD
This amendment has been prepared by IEC technical committee 87: Ultrasonics.
The text of this amendment is based on the following documents:
CDV Report on voting
87/612/CDV 87/639/RVC

Full information on the voting for the approval of this amendment can be found in the report

on voting indicated in the above table.

The committee has decided that the contents of this amendment and the base 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.
_____________
2 Normative references
Add the following new reference:

IEC 61689, Ultrasonics – Physiotherapy systems – Field specifications and methods of

measurement in the frequency range 0,5 MHz to 5 MHz
3 Terms, definitions and symbols
3.26
derived instantaneous intensity
(added by Amendment 1)
Delete the following text below the term:
"approximation of the instantaneous intensity"
Replace the existing four lines before Equation (1) by the following:

quotient of squared instantaneous acoustic pressure and characteristic acoustic impedance of

the medium at a particular instant in time at a particular point in an acoustic field

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SIST EN 62127-2:2008/A2:2017
IEC 62127-2:2007/AMD2:2017 – 3 –
© IEC 2017
4 List of symbols
Replace:
ρc specific acoustic impedance
ρc characteristic acoustic impedance of the measurement liquid (water)
Add the following new symbols:

d distance between the auxiliary transducer and the reflector measured along the axis of

symmetry

d distance between the auxiliary transducer and the active element of the hydrophone

measured along the axis of symmetry
d distance between the auxiliary transducer and the last minimum of the acoustic
pressure amplitude along the axis of symmetry of the auxiliary transducer
R amplitude reflection coefficient for the reflector/water interface
Z characteristic acoustic impedance of the reflector
J reciprocity coefficient for plane waves
S apparent transmitting current response of an auxiliary transducer
M apparent receiving voltage response of an auxiliary transducer
p acoustic pressure generated by a transducer at its surface
p acoustic pressure incident on a transducer surface
p acoustic pressure incident on the hydrophone surface
I transmitting current driven to a transducer
U voltage generated by a transducer in the receiving mode

G correction that accounts for the diffraction in the propagation field and is related to the

waveform generation by the transducer and the reception by the hydrophone

G correction that accounts for the diffraction in the propagation field and is related to the

generation and the reception by the transducer
U voltage measured with the transducer coupled to the system
load
I current measured over a short circuit jumper replacing the transducer
9 Free field reciprocity calibration
9.1 General
Replace the existing text by the following:

This clause specifies the primary reference measurement procedure (see JCGM 200:2012,

2.8 [79]) calibration of hydrophones under free field conditions using the principle of

reciprocity.
Add the following new note:

NOTE The free field condition can be achieved in a confined water space by following any of a variety of

measurement procedures, such as with the use of tone-burst (time-gated sine wave – see 10.5.3), time-delay

spectrometry [63, 68], frequency modulated chirp [80, 81] or other techniques [82].

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SIST EN 62127-2:2008/A2:2017
– 4 – IEC 62127-2:2007/AMD2:2017
© IEC 2017
9.4 Two-transducer reciprocity calibration method
9.4.1 Apparatus
Replace the existing subclause title and text by the following:
9.4.1 Auxiliary transducers

Circularly plane piston auxiliary transducers should be used to generate the ultrasonic field in

the frequency range of interest, limited to the maximum range between 1 MHz and 15 MHz.

The effective radiation area (A ) shall be determined, according to IEC 61689, for each

transducer and at all frequencies the transducer is intended to be used. If a frequency

modulated chirp is to be used as excitation signal, the A shall be determined at least in the

minimum, maximum and one intermediate frequency in the range of interest.

The position of the last minimum of acoustic pressure amplitude along the axis of symmetry,

d , shall be determined with an uncertainty not larger than 1 mm. It shall be done as an on-

axis line scan, according to IEC 61689, at the same frequencies the A was determined. The

near field distance produced by the auxiliary transducer is defined as N = a /λ, where λ is

1 t

the ultrasonic wavelength in water at the frequency of operation and a = 2λd +λ is the

t m
effective radius of the ultrasonic transducer.

NOTE Focusing auxiliary transducers can be used, but several corrections need to be applied, and this document

is only intended for plane-piston transducers. A detailed implementation of a reciprocity-based calibration method

using focusing transducers can be found in [84].

The effective radiation area (A ) is used in the equations of Annex K to properly assess the

diffraction correction and the reciprocity coefficient for plane waves, whilst the last minimum

) is used to indirectly define the near
of pressure amplitude along the axis of symmetry (d

field distance (N ), being N = (2λd + λ )/λ. Although both quantities A and d are directly

1 1 m ER m

linked for ideal transducers, both shall be determined experimentally according to IEC 61689.

9.4.2 Procedure
Replace the existing subclause title and text by the following:
9.4.2 Reflector

The reflector should comprise a flat surface whose smallest linear dimension shall be at least

four times the effective radius of the ultrasonic transducer a . The reflector shall also be flat to

±10 μm, with a surface finish good to ±5 μm (surface roughness: R < 5 μm; R < 5 μm;

v p

R < 1 μm). The thickness of the reflector shall be such that the first reflection from the rear

surface will not interfere with that directly from the front surface for any of the excitation

signals to be used. Special attention shall be given for long burst or low-rate frequency

modulated chirps, mainly at the lowest frequencies of interest.

The amplitude reflection coefficient for the reflector/water interface R shall be

experimentally determined, for instance by the relation R = (Z – ρc)/(Z + ρc), were ρc

RT RT RT

is the characteristic acoustic impedance of the water and Z is the characteristic acoustic

impedance of the reflector.

NOTE R is the maximum valley depth, R is the maximum peak height and R is the arithmetic average

v p a
describing the reflector profile roughness amplitude parameters.
Add the following new subclauses:
9.4.3 Measurement field

As both the auxiliary transducer and the hydrophone have finite apertures, a diffraction

pattern is present in the ultrasonic field. To minimize uncertainties due to the analytical or

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SIST EN 62127-2:2008/A2:2017
IEC 62127-2:2007/AMD2:2017 – 5 –
© IEC 2017

numerical corrections to be applied to the measurement quantities, the nearest measurement

shall be performed at least at 0,9 × N , and the furthest distance shall not be larger than

2,2 × N . Water-air surface and tank walls shall be far enough from the ultrasonic path such

that any reflected waveform will not interfere with the direct waveform at the measurement

spot.

If any structure is too close to the direct ultrasonic waveform path, it shall be covered with

absorbing lining to minimize the interference with the measurement signal, an
...

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