Piezoelectric transducer assembly and method

摘要

A piezoelectric transducer assembly comprises a piezoelectric transducer (2) having transmitting and receiving portions. A control system (Figure 4) supplies a control signal to the transmitting portion of the piezoelectric transducer (2) and receives a signal from the receiving portion. The control system includes an electronic simulation circuit (27) which simulates the coupling between the transmitting and receiving portions of the piezoelectric transducer (2) and the effects of the receiving portion on the received signal. The simulation circuit (27) receives a copy of the control signal and generates an output signal equivalent to the output signal which is generated by the piezoelectric transducer (2) as a result of the receiving portion receiving a signal from the transmitting portion directly. Modifying means (21) modifies the signal from the receiving portion with the signal output from the electronic simulation circuit (27). <IMAGE>