Title :
Low cost broadband ultrasonic transducers
Author :
Anspach, D. ; Salt, J.E.
Author_Institution :
Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada
Abstract :
The design of a broadband wetted transducer involves stacking a piezoelectric device in layers of adhesives, electrodes and protective coatings. The frequency response of the transducer is heavily influenced by the electrodes, adhesives and protective coatings. A relatively new piezoelectric material, polyvinylidene fluoride, has a very flat linear phase response over a broad frequency band. This paper suggests specific materials for the backing and protective coating to maintain a flat response. Results of modeling, construction, and testing of transducers are reported. The transducer is designed to be used in a water flow meter
Keywords :
frequency response; piezoelectric thin films; piezoelectric transducers; polymer films; protective coatings; testing; ultrasonic transducers; adhesives; backing; broadband wetted transducer; electrodes; frequency response; linear phase response; low cost broadband ultrasonic transducers; piezoelectric device; piezoelectric material; polyvinylidene fluoride; protective coatings; Coatings; Costs; Electrodes; Frequency response; Piezoelectric devices; Piezoelectric materials; Piezoelectric transducers; Protection; Stacking; Ultrasonic transducers;
Conference_Titel :
Electrical and Computer Engineering, 1997. Engineering Innovation: Voyage of Discovery. IEEE 1997 Canadian Conference on
Conference_Location :
St. Johns, Nfld.
Print_ISBN :
0-7803-3716-6
DOI :
10.1109/CCECE.1997.608323
