Changes of Working Parameters of a Normal Beam Non-destructive Evaluation Ultrasound Transducer Due to Different Electrical Excitations (CROSBI ID 194983)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Petošić, Antonio ; Čorak-Cvjetičanin, Zrinka ; Budimir, Marko
engleski
Changes of Working Parameters of a Normal Beam Non-destructive Evaluation Ultrasound Transducer Due to Different Electrical Excitations
The electrical excitation dependence of working parameters of a normal beam non-destructive evaluation ultrasound transducer has been investigated. Noteworthy differences between the transducer input electrical impedance and acoustic properties at low excitation voltages (~1V), most often used in electromechanical characterizations by performing frequency sweeps, and at high excitation voltages (~250V), generally used to drive ultrasound transducers in non-destructive evaluation applications, were emphasized. For the purpose of this work, a circular normal beam ultrasound transducer of centre frequency 2 MHz was constructed by using a PZT piezoelectric disk, epoxy-based acoustically passive front matching and backing layers, an electrical impedance matching element, housing and coaxial cable. The transducer was characterized around the thickness extensional vibration mode both by using low and high voltage electrical excitation signals. The characterization of the electromechanical properties was conducted at several different stages of the transducer construction and for several excitation signal waveforms and levels.
non-destructive testing; ultrasound transducer. piezoelectric ceramic; electrical excitation waveform
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Podaci o izdanju
53 (3)
2011.
199-202
objavljeno
0562-1887
620.179.16:681.586.48:681.586.773