Power measuring apparatus for ultrasonic transducers

Details Power measuring apparatus for ultrasonic transducers Power measuring apparatus for ultrasonic transducers

1978-06-19

1979-07-10

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

G01N 2900

Patent

active

041603885

ABSTRACT:
A measuring apparatus employs a target vane suspended from a movable arm and disposed in a water bath. The transducer under test is arranged to direct its energy at the vane. An electric nulling circuit maintains the arm in its initial position. The current required to do so is a measure of the power of the transducer. An acoustic trap is provided to insure accurate measurement.

REFERENCES:
patent: 2762447 (1956-09-01), Cady
patent: 3915017 (1975-10-01), Robinson
Wells et al., "Milliwatt Ultrasonic Radiometry," Ultrasonics, Jul./Sep. 1964, pp. 124-128.

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