Piezo-electric transducer test apparatus

Details Piezo-electric transducer test apparatus Piezo-electric transducer test apparatus

1989-04-17

1990-10-02

Raevis, Robert

Measuring and testing

Frictional resistance, coefficient or characteristics

Lubricant testing

367 13, H01L 4142

Patent

active

049599925

ABSTRACT:
An acoustic loading rod for use in testing transducers which are intended for use in a liquid medium. The rod comprises an elongated body (10) capable of simulating the normal acoustic impedance presented to a transducer to be tested by the medium in which the transducer is to operate, the rod (10) having a bore (30) in its main body portion containing a core of material having a close match of acoustic impedance with the material of the rod but a higher acoustic loss factor. Active piezo-electric transducer (22) is mounted between the ends of the rod.

REFERENCES:
patent: 4331021 (1982-05-01), Lopez et al.
patent: 4475376 (1984-10-01), Keilman
patent: 4747295 (1988-05-01), Feist et al.
patent: 4838070 (1989-06-01), Bradley

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