Method of driving ultrasonic transducer

Details Method of driving ultrasonic transducer Method of driving ultrasonic transducer

2005-03-29

2009-12-29

SanMartin, J. (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S334000, C600S437000, C600S459000, C367S155000, C367S157000

Reexamination Certificate

active

07638924

ABSTRACT:
An ultrasonic transducer includes a piezoelectric resonator including a pair of electrodes sandwiching a piezoelectric body and provided with the backing layer in contact with one of the electrodes of the piezoelectric resonator and having the same acoustic characteristic impedance as the piezoelectric body. A method includes the step of driving the ultrasonic transducer so as to satisfy a condition: 2Th≦Td≦6Th where Th is a propagation time of an ultrasonic wave in the piezoelectric body sandwiched by the pair of electrodes, and Td is a pulse width of a drive pulse driving the piezoelectric resonator.

REFERENCES:
patent: 7432638 (2008-10-01), Yamashita et al.
patent: 06-30933 (1994-02-01), None
patent: 2003-37896 (2003-02-01), None
patent: 2003-259490 (2003-09-01), None
International Search Report issued in the corresponding International Application No. PCT/JP2005/005883, mailed on Aug. 16, 2005.
Official communication issued in the counterpart Chinese Application No. 200580001696.9, mailed on Sep. 7, 2007.

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