FSUE “VNIIFTRI”, Mendeleevo, Moscow region, Russia
Al’manac of Modern Metrology № 3 (31) 2022, pages 31–44
Abstract. As part of the work to improve the state primary standard of an ultrasonic power unit in water GET 169 a reference meter of ultrasound power in water EIMU-3 was developed and put into operation, using the gravitational method of balancing the radiation force of the ultrasonic wave incident on the absorbing ultrasound target, suspended from precision electronic balance and located in the water. The application of this measurement method was allowed to reduce the dynamic range of reproduction and transmission unit of ultrasound power from 5 to 1 mW, as well as to expand the frequency range of reproduction and transmission from 12 to 20 MHz. Metrological characteristics of the meter are given and the budget of measurement uncertainties is justified.
Keywords: ultrasound power, non-exceptional systematic measurement error, measurement uncertainty, absorbing target, radiating force, standard deviation, ultrasound beam.
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