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http://dx.doi.org/10.5369/JSST.2004.13.6.417

Frequency Controllable Wide-Beam Ultrasonic Transducer with Transverse Mode  

Kim, Jung-Soon (Department of Physics, Pukyong National University)
Kim, Moo-Joon (Department of Physics, Pukyong National University)
Ha, Kang-Lyeol (Department of Physics, Pukyong National University)
Kang, Kab-Jung (Department of Physics, Pukyong National University)
Publication Information
Journal of Sensor Science and Technology / v.13, no.6, 2004 , pp. 417-423 More about this Journal
Abstract
In order to obtain wide-beam characteristics and variable resonant frequency of a ultrasonic transducer for the array source, an electrode of transverse mode piezoelectric vibrator is divided, and an electronic inductance is connected to the divided electrodes. The electronic inductance is made by GIC (General Impedance Converter) circuit. Because the GIC circuit is made of OP-Amps and other passive elements, the value of the inductance can be selected easily. As the results, the electronic inductance is variable in the range from 0.2 mH to 1.2 mH. Using the inductance, the resonance frequency of the transducer can be changed in the range from 73 kHz to 86 kHz. In the directivity of the transducer, it is confirmed that the beam width of the transducer is wider than $80^{\circ}$ at -3 dB in water.
Keywords
transverse mode; wide band ultrasonic transducer; variable frequency; array source; GIC circuit; electronic inductance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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