Community Research and Development Information Service - CORDIS

Abstract

Ultrasonic standard transducers (power standards) are of high potential value for the metrology of ultrasonic fields, and this is of relevance to medical, industrial and other applications. In particular, they could serve as the basis of an international intercomparison campaign in the EC. Three sets of ultrasonic standard transducers for nominal frequencies of 1, 2, 3, 4, 5 and 10 MHz have been designed, constructed and tested. As active transducer elements, x-cut quartz discs of coaxial electrode design are used. The main concern in the development has been to ensure a robust and waterproof mounting of the quartz disc, and at the same time, a highly undisturbed vibrational behaviour, which means an almost perfect decoupling from the transducer housing. The ultrasonic transducer data and in particular the radiated power, have been measured by means of a radiation force balance. The standard transducers in the final version proved to meet all necessary requirements. The measurement results obtained are in close proximity to theoretical estimates, based on the assumption of ideal transducer behaviour, and are highly self-consistent: the scatter in the radiation characteristics of all 18 transducers amounts to a standard deviation of 1.4% only.

Additional information

Authors: BRENDEL K, PHYSIKALISCH-TECHNISCHE BUNDESANSTALT, BRAUNSCHWEIG (GERMANY);BEISSNER K, PHYSIKALISCH-TECHNISCHE BUNDESANSTALT, BRAUNSCHWEIG (GERMANY);LUDWIG G PHYSIKALISCH-TECHNISCHE BUNDESANSTALT, BRAUNSCHWEIG (GERMANY), PHYSIKALISCH-TECHNISCHE BUNDESANSTALT, BRAUNSCHWEIG (GERMANY)
Bibliographic Reference: EUR 10809 EN (1986) MF, 45 P., BFR 150, BLOW-UP COPY BFR 225, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989125051900 / Last updated on: 1987-11-01
Category: PUBLICATION
Available languages: en