Development of the non-damped wide-band ultrasonic transducers

Abstract

In this article low frequency non-damped wide-band ultrasonic transducers are described. The important part of the non-damped transducers is the size of the piezoelement which can operate as a broadband transducer. The two kinds of piezoelements are investigated. The first, the non-damped piezoelement with dimensions of 5×5×5 mm was used as an experimental model. Ultrasonic signals and their frequency responses are presented for a single piezoelement and for the piezoelement with matching layer. The two cases of the transmitter and the receiver, in which the piezoelement alone and with the matching layer was used, are investigated. It is shown, that the piezoelement acting as a receiver gives the shorter pulse and the wider frequency response, than piezoelement acting as a transmitter. Also, it is shown that the single non-damped transducer gives a higher amplitude (by 10 ... 12 dB) than hard damped transducers