IEC TS 62903 : 1ED 2018

Table of Contents

FOREWORD<br>INTRODUCTION<br>1 Scope <br>2 Normative references <br>3 Terms and definitions <br>4 Symbols <br>5 General<br>6 Requirements of the measurement system <br>7 Measurement of the effective half-aperture of the<br>&nbsp;&nbsp;spherically curved transducer <br>8 Measurements of the electroacoustical parameters<br>&nbsp;&nbsp;and the acoustic output power<br>9 Measurement uncertainty <br>Annex A (informative) - Relation of the average<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;amplitude reflection coefficient on a plane<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;interface of water-stainless steel and the focus<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;half-angle for a normally incident beam of a<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;circular spherically curved transducer [1, 2]<br>Annex B (informative) - Diffraction correction<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;coefficient G[sf] in the free-field selfreciprocity<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;calibration method for circular spherically<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;curved transducers in water neglecting<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;attenuation [2, 3, 4]<br>Annex C (informative) - Calculation of the diffraction<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;correction coefficient G[sf](R/[lambda],[beta]) in the<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;free-field self-reciprocity calibration in a<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;non-attenuating medium for a circular spherically<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;curved transducer [2, 3, 4, 7]<br>Annex D (informative) - Speed of sound and attenuation<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;in water<br>Annex E (informative) - Principle of reciprocity calibration<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for spherically curved transducers [2, 3, 4]<br>Annex F (informative) - Experimental arrangements<br>Annex G (informative) - Relationships between the<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;electroacoustical parameters used in this<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;application [13] <br>Annex H (informative) - Evaluation and expression of<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;uncertainty in the measurements of the radiation<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;conductance <br>Bibliography

Abstract

Describes: - the free-field convergent spherical wave self-reciprocity method for ultrasonic transducer calibration, - the measurement conditions and experimental procedure required to determine the transducer's electroacoustic parameters and acoustic output power using the self-reciprocity method, - the criteria for checking the reciprocity of these transducers and the linear range of the focused field, and - guiding information for the assessment of the overall measurement uncertainties for radiation conductance.

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Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 87