Title :
10D-4 Waveguide Transducers with Limited Diffraction Beam for Ultrasonic Flow Measuring at High Temperature and Pressure
Author :
Hamidullin, V.K. ; Malakhanov, R.N. ; Gnedov, A.A. ; Osokin, G.R. ; Nagaevskiy, S.V.
Author_Institution :
VZLJOT Co., St. Petersburg
Abstract :
An impulse response approach was applied for analysis of acoustic field, creating by the end of the transducer with waveguide having multilayered (multi-tube) structure and considering it as an annular array. This approach is based on calculation of 3-D impulse response acoustic field generated by flat annular arrays of different apertures under unit impulse excitation. A quick damping transient field has been obtained by selecting certain thickness of layers and distance between them. Tests were conducted with transducers (length 60 mm) having waveguides filled with spiraled metal foil of 0.2 mm (carbon steel) and 0.1 mm (stainless steel). Tests provided transmitting through water short wave packet of 1MHz with SNR about 20.
Keywords :
acoustic field; acoustic intensity measurement; acoustic waveguides; flow measurement; ultrasonic transducers; 3D impulse response acoustic field; carbon steel; limited diffraction beam; multilayered structure waveguide; spiraled metal foil; stainless steel; ultrasonic flow measurement; waveguide transducers; Acoustic arrays; Acoustic transducers; Acoustic waveguides; Diffraction; Fluid flow measurement; Pressure measurement; Steel; Temperature measurement; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 2007. IEEE
Conference_Location :
New York, NY
Print_ISBN :
978-1-4244-1384-3
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2007.234
