O. Shpak, Dariia Duviriak, V. Parakuda, I. Kizlivskyi
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Experimental investigation on the effective radiating area of ultrasonic transducers with the aim of increasing the reproduction accuracy of the unit of ultrasonic pressure in water
This paper presents the results of an experimental investigation on the effective radiating areas (AER) of auxiliary ultrasonic transducers forming part of the measurement standard for the unit of ultrasonic pressure in water NDETU AUV-02-2018. When carrying out measurements, the pressure field of MANA Instruments ultrasonic transducers E1025-SU; E2312-SU; E3512-SМ has been subjected to raster scanning at operating frequencies using a raster scanning system. A positioning device for ultrasonic transducers was developed at DP NDI “Systema” in the process of creating the measurement standard NDETU AUV-02-2018, and forms its integral part. The AER calculation protocol has been developed based on IEC 61689. The type A uncertainty has been evaluated from ten repetitions of the full measurement procedure to determine the AER, аnd the type B uncertainty has been estimated from the AER-specific mathematical model based on IEC 61689 and DSTU-N RMG 43 “Metrology. Application of the Guide to the Expression of Uncertainty in Measurement”.
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