Fale krawędziowe przetworników piezoelektrycznych w świetle problematyki pomiarowej

• Autorzy: Filipczyński L. , Kujawska T.

Warianty tytułu

EN

Edge waves of piezoelectric transducers in measurement problems

• Konferencja: XLVIII Otwarte Seminarium z Akustyki, Wrocław-Polanica Zdrój, 11-14 września 2001 r.
• Języki publikacji: PL

Abstrakty

EN

Measurements in the very near field of piezoelectric transducers are fundamental for many ultrasonic problems. In such cases also the transducer vibrations should be known to perform mathematical models of the radiated beams. Acoustical pressure measurements near to the transducer surface can give the necessary information. The pressure of the radiated wave at the transducer surface corresponds to its normal vibration velocity multiplied by the pc value of the medium. However, this is valid only for the central wave, when the edge wave of the transducer can be ignored. On the other hand the pressure measurements on and very near to the transducer surface are not possible because of the voltage leakage between the electronic transmitter and the PVDF hydrophone used in measurements. By means of the numerical model the central and edge waves were found for a plane PZT transducer 7.5 mm in radius, supplied with a 3 MHz voltage pulse composed of 3.5 cycles. Hence practical conditions were elaborated which make it possible to carry out pressure measurements corresponding to vibration velocities of the piezoelectric transducer under consideration.

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Telekomunikacji i Akustyki Politechniki Wrocławskiej. Konferencje
• Rocznik: 2001
• Tom: Vol. 83, nr 27
• Strony: 393--398
• Opis fizyczny: bibliogr.7 poz.

Twórcy

autor

Filipczyński L.

autor

Kujawska T.

• Instytut Podstawowych Problemów, Techniki PAN, ul. Świętokrzyska 21, Warszawa