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IEC TS 63001
Edition 1.0 2019-01
TECHNICAL
SPECIFICATION
colour
inside
Measurement of cavitation noise in ultrasonic baths and ultrasonic reactors
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IEC TS 63001
Edition 1.0 2019-01
TECHNICAL
SPECIFICATION
colour
inside
Measurement of cavitation noise in ultrasonic baths and ultrasonic reactors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.140.01; 17.140.50 ISBN 978-2-8322-6410-2
– 2 – IEC TS 63001:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 List of symbols . 11
5 Measurement equipment . 11
5.1 Hydrophone . 11
5.1.1 General . 11
5.1.2 Calibration of hydrophone sensitivity . 12
5.1.3 Hydrophone properties . 12
5.1.4 Hydrophone compatibility with environment . 12
5.2 Analyser . 13
5.2.1 General considerations . 13
5.2.2 Specific measurement method: transient cavitation spectrum at f =
2,25 f . 14
5.2.3 Specific measurement method: broadband transient and stable
cavitation spectra . 14
5.3 Requirements for equipment being characterized . 14
5.3.1 Temperature and chemistry compatibility with the hydrophone . 14
5.3.2 Electrical interference . 14
6 Measurement procedure . 14
6.1 Reference measurements . 14
6.1.1 Control of environmental conditions for reference measurements . 14
6.1.2 Measurement procedure for reference measurements . 15
6.2 Measurement procedures for in-situ monitoring measurements . 15
Annex A (informative) Background . 16
A.1 Cavitation in ultrasonic cleaning . 16
A.2 Practical considerations for measurements . 18
A.3 Measurement procedure in the ultrasonic bath . 19
A.4 Characterization methods that do not utilize the acoustic spectrum . 20
Annex B (normative) Cavitation measurement at 2,25 f . 21
B.1 General . 21
B.2 Measurement method . 21
Annex C (informative) Example of cavitation measurement at 2,25 f . 24
Annex D (normative) Cavitation measurement by extraction of broadband spectral
components . 25
D.1 Compensation for extraneous noise . 25
D.2 Features of the acoustic pressure spectrum . 25
D.3 Identification of the operating frequency f and direct field acoustic pressure . 26
D.3.1 Identification of the operating frequency f . 26
D.3.2 Fit to primary peak (direct field) . 26
D.3.3 Determination of RMS direct field acoustic pressure . 26
D.3.4 Validation . 26
D.4 Identification of stable and transient cavitation component . 26
D.4.1 Subtraction of direct field component of spectrum . 26
D.4.2 Determination of stable cavitation component . 26
D.4.3 Determination of transient cavitation component . 26
D.4.4 Validation . 27
Bibliography . 28
Figure A.1 – Typical setup of an ultrasonic cleaning device . 16
Figure A.2 – Spatial distribution of the acoustic pressure level in water in front of a 25
kHz transducer with reflections on all sides of the water bath (0,12 m × 0,3 m × 0,25 m) . 17
Figure A.3 – Typical Fourier spectrum for sinusoidal ultrasound excitation above the
cavitation threshold at an operating frequency of 35 kHz . 17
Figure A.4 – Sketch of cavitation structure under the water surface at an operating
frequency of 25 kHz . 18
Figure A.5 – Typical rectangular ultrasound signal with a frequency of 25 kHz and 50
Hz double half wave modulation . 19
Figure B.1 – Block diagram of the measuring method of the cavitation noise level L . 22
CN
Figure C.1 – Power dependency of the cavitation noise level L . 24
CN
Figure D.1 – Schematic representation of acoustic pressure spectrum . 25
Pf()
RMS
– 4 – IEC TS 63001:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MEASUREMENT OF CAVITATION NOISE IN ULTRASONIC
BATHS AND ULTRASONIC REACTORS
FOREWORD
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Technical Specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
Technical Specification IEC 63001 has been prepared by IEC technical committee 87:
Ultrasonics.
The text of this Technical Specification is based on the following documents:
Draft TS Report on voting
87/681/DTS 87/693A/RVDTS
Full information on the voting for the approval of this Technical Specification can be found in
the report on voting indicated in the above table.
This document h
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