An Electrical Load for Simulating a Transducer in an Array.
TEXAS UNIV AUSTIN APPLIED RESEARCH LABS
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Individual transducer elements of large sonar arrays are subject to electrical impedance changes as a result of acoustical interactions between neighboring driven elements. In order to transmit acoustic power, the elements are driven individually or in groups by power amplifiers. When a prototype amplifier is constructed, an entire array of transducers and amplifiers may not be available for testing the amplifier. A passive electrical dummy load was constructed to have impedance characteristics equivalent to the particular type of transducer which a prototype current-source switching amplifier was to drive. An active port was added to the electrical dummy load to change the amplifiers load impedance at all frequencies of interest, thereby simulating different positions in a transducer array in which more than one element is driven. The dummy load design technique is described. Author
- Acoustic Detection and Detectors